SBC CHEVY 434 PRO STREET MOTOR, AFR HEADS, CRATE MOTOR 655 hp BASE ENGINE
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SBC CHEVY PRO STREET HYDRAULIC ROLLER CAM 434 CUBIC INCH ENGINE 655 HP STREET ROD SETUP.
RUNS ON PUMP GAS.
This engine is fully assembled from intake to oil pan.
DART SHP BLOCK WITH SPLAYED MAIN CAPS.
FORGED 4.155 BORE WISECO PISTONS, SCAT 4.00 STROKE FORGED CRANK, AND 6.0 SCAT RODS WITH ARP 2000 CAP SCREWS. AFR 220cc FULL CNC'd HEADS ALUMINUM HEADS.
FULLY ASSEMBLED FROM INTAKE TO OIL PAN.
- DART SHP BLOCK WITH SPLAYED MAIN CAPS. COMMONLY USED IN ENGINES BUILT TO 800+ HORSE POWER.
- AFR FULL CNC'd HEADS ALUMINUM ALLOY HEADS.
- EDELBROCK SUPER VICTOR II INTAKE MANIFOLD
- COMP REDUCED BASE HYD. ROLLER CAM WITH COMP SHORT TRAVEL HYD. ROLLER TIE BAR LIFTERS.
- SA GEAR BILLET TIMING SET WITH TORRINGTON BEARING AND ROLON CHAIN 9 KEYWAY. TOP OF THE LINE.
- SCORPION RACE ALUMINUM ROCKERS.
- NEW EXCALIBUR SERIES SCAT FORGED CRANKSHAFT,
- CLEVITE HP BEARINGS. BALANCED ON OUR CWT BALANCER TO BELOW 2 GRAMS.
- SCAT COMPETITION RODS WITH ARP 2000 CAP SCREWS.
- WISECO PREMIUM FORGED PISTONS. 800+HP RATED. 2618 ALLOY
- MELLING M-SELECT SERIES OIL PUMP WITH M-SELECT DRIVE ROD.
- CHAMP CUSTOM OIL PAN WITH OIL CONTROL SYSTEM. 5qt. or 7qt
- ATI SUPER DAMPER SFI RATED
- ONE YEAR WARRANTY.
This engine is designed for street/strip use. Pump gas friendly.
See our other listings for the fully dressed out version of this engine.
We also offer this engine in a de-tuned form with multiple cam and intake options in our other listings. Those engines are titled as our "Stage 5.5" 434 engines. They are available in a base model, turn key, or serpentine turn key. The Pro Street engines will have diminished drivability, and are not recommended for high mileage driving in excess of 5,000 miles per year. They are setup to obtain the highest practical horse power numbers for street and strip use, and they also have a very aggressive idle and overall engine tone. The Pro Street engines are not recommended for use in cars with overdrive transmissions, or cars with steep gearing. Our Pro Street engines have several internal upgrades that our regular "Stage" series of engines do not have. We also offer this engine is a Super Pro Street series. The hp numbers are in the 700hp range. See our other listings for that engine.
Our 434 Pro Street engine is setup for those wanting the best possible hp numbers available in an sbc engine while maintaining decent street manners, and running pump gas as well as low maintenance. We also offer these engines with in a de-tuned version with multiple cam and intake choices tailored to your exact specifications. This engine should only be used in light to medium weight vehicles with decent gearing. The carb required on this engine would need to be right at 950 cfm to make the projected hp numbers. The carbs used on the most recent ones we built were the Holley Ultra XP 950cfm. If you use any of the Quick Fuel carbs, expect a drop in power from what we have seen. The Quick Fuel Q-1000 made about 18hp less. The Holley mentioned above really worked well on this build.
We do a full test run on every engine we build on a test mule. The engine is run for two intervals of 15 minutes each, and every possible issue is addressed. When you install the engine, you must verify that the timing is set at the correct value, and the fuel to air ratio must be verified. We also include an engine stand like the one pictured, wheels included, and an engine lift plate.
The build sheet is as follows:
Pictured below is the new Dart SHP block. This block is the absolute ultimate in quality, durability, and value.
Dart SHP block, splayed caps
The block is bored to size with our new Centroid touch probe machine. Few machine shops have a machine of this accuracy.
We also deck the blocks to an RA finish of approx. 15 or better. The decking procedure is also done by our Centroid CNC machine.
We often find many brand new blocks to have a sloping deck of up to 4 thous. When we're finished decking the block, it is within approx. .001 accuracy from end to end. Many machine shops fail to catch this as the machinery they use does not allow for such accuracy.
We then plate hone the block with our new Sunnen SV10 diamond hone machine. This is also a very advanced machine that hones the block with a finish unlike conventional machines.
The final step is to clean the block in our high pressure block washer.
Pictured below is the rotating assembly that comes in this engine.
(file photo, actual parts may vary, see details below)
The photos above and below are file photos. Actual appearance may vary. This picture is to give you an idea of parts used in the rotating assembly portion of this engine. All parts are brand new, first line, unblemished, and balanced in house.
READ THIS LISTING COMPLETELY BEFORE YOU BUY ELSEWHERE!
Connecting Rod Specs.
Piston & Ring Specs.
Bearing, Damper, and Flexplate Specs.
WISECO FULLY FORGED PISTONS, RATED AT 800+ HP. WISECO PISTONS ARE 100% MANUFACTURED IN THE USA. THEY ARE ONE OF THE HIGHEST RATED PISTON BUILDERS IN THE COUNTRY.
Our Wiseco Forged pistons are custom designed with an increase in compression height. This has many advantages. Here are a few facts about compression height and deck height.
Our custom made pistons have a compression height that is .010 taller on bbc pistons, and .015 taller on sbc pistons, as compared to most all of the catalog pistons on the market. We find this to be a very valuable feature.
Since our pistons sit at a taller than normal compression height, we only have to remove approx. .005-.010 off the deck surface of the block. Our goal is set the piston at zero deck (flush with the deck surface). This maintains the deck's thickness, making it much stronger than a block that has been cut down .025. The engine will also run a bit cooler with a thicker deck. It's well known that the deck dissipates much of the built up heat an engine generates. This also allows for future deck re-surfacing without compromising the integrity of the block. On our bbc engines, we actually leave the piston about .003 to .005 in the hole to allow for possible piston rock. Our sbc engines will have the pistons setting right at zero with the deck.
You may have noticed that our Wiseco custom made forged pistons are referred to as Racing Pistons on the package. This does not mean that the pistons are for racing only. This is a generic term, referring to their ability to be used in high performance applications as well as for street rod use. These pistons are perfectly designed for use on the street, as well as for medium to upper level drag racing.
We have built approximately 5000 engines using the Wiseco pistons. The engines have been for street rod and strip use. We have seen no problems, nor have there been any complaints. They are an excellent product in every respect.
These pistons are also suitable for use with nitrous or blower setups.
The Wiseco forged pistons are rated very high in the street/strip performance industry. They
are made using the 2618 aircraft alloy and have fully machined crowns. We prefer the 2618 alloy over the lower cost 4032 alloy. This alloy may fragment from the effects of detonation and if this happens, it can be very destructive to the engine.
Those types of pistons are fine for stock or mild engine builds, but should never be used in carbureted engines built to high horse power levels.
The forged 2618 alloy piston is much more resistant to the effects of detonation and heat.
The picture below is a file photo of our Wiseco flat top piston used in this engine.
MAHLE HIGH PERFORMANCE FILE FIT RINGS
The New Scat Excalibur 4340 Forged Crankshaft.
The picture below is a generic file photo of a Scat crankshaft.
Some of the benefits of the new Scat Excalibur crankshaft supplied with this engine:
The material used in Scat Excalibur series crankshaft is manufactured from an exclusive Space Age material that was designed for high strength and fatigue resistance. The Scat forged cranks are many times stronger than stock OEM cast cranks and are the best value you will ever find. The Scat forged crankshafts are the best way to build a strong bottom end for street rods, dirt and circle track racing, and drag strip racing. This crank is suitable for use up to approx. 750-850 hp. The new Excalibur series cranks from Scat have several key advantages over the regular Scat forged cranks. The chamfered journal holes have been improved. The bull nose counter weights reduce windage, and when drilling the counter weights during the balancing procedure, we have noticed that the material the cranks are made from is much harder than the regular forged cranks.
Pictured below is our ABS crank polishing machine in action. We polish the crank on every engine we build. This extends bearing life, keeps oil cooler, and with the reduced friction, a slight increase in horsepower is gained. Many machine shops fail to do this. The finish on most cranks are at the bare minimum of acceptance, and we know this can affect bearing life. We have measured the RA finish with our profilometer, and found it to be as high as 25 RA finish on many of the cranks. We bring that number down considerably.
We now use the Clevite bearings in our engines.
Our choice of rods are the SCAT COMPETITION SERIES rods with ARP-2000 cap screws.
The Scat Pro-Comp extreme duty I-beam rods should not be mistaken for ProComp rods. These rods are made exclusively by Scat, and have nothing to do with the ProComp company. The critical sizing and installation of the ARP cap screws is performed on a Sunnen machine in the USA by Scat Industries. These rods are excellent for those wanting the extra security offered by a rod with 7/16 ARP cap screws.
Take notice of the design of these rods. They are far superior to conventional style I-beam rods. We are now using this rod in all of our Stage 4 and up SBC engines. We also use this rod in our big block 505/540/555 engines, making approx. 700+hp.
If you do a search on the Scat Pro-Comp rods, you will find a vast amount of info on many car forums. All of the info is 100% positive. These rods are run in engines that not only produce high horsepower levels, but also run at continuous RPM. Notice the general appearance in the pictures. These rods do look impressive. The style is reminiscent of a steel billet rod.
The fact that these rods are incredibly strong and well made, coupled with the fact they are light weight and offer better clearance than any H-Beam rod on the market, made it an easy decision to use them in all of our high horsepower street/strip engines.
We use genuine Scat rods with ARP 2000 cap screws in this engine. Our Scat rods are bronze bushed, and unlike Eagle I beam rods, these are fully forged 4340 alloy.
We have noticed some engine builders using low cost generic rods and crankshafts in their engines. These non-branded, (no-name) products are often poor quality in many ways. You will notice many of the low end engine builders fail to mention the actual brand of the rods or cranks used in their engines. Upon further investigation you will find such parts not to be a branded name product. They may label these parts with a name, but one that is totally unrecognizable in the industry. Our experience in years past with such rods and cranks has been disappointing to say the least. Besides the obvious issues such as incorrect sizing and machining that is difficult to correct, the questionable alloy these items may be produced from and the potentially incorrect heat treating methods used, could prove to be disastrous. Little can be done to verify this and nothing can be done to correct it. Failures of such critical parts will usually result in catastrophic damage to the engine. As you may have noticed, this is why we specify the brand name and series of every part used in our engines.
Genuine ARP 2000 cap screws.
Many of the inferior "no-name" rods on the market will also have "no-name" rod bolts in them. We have seen these bolts before, and they are very low quality. They don't have ARP's rolled thread design, and they don't torque down with the same characteristics as a genuine ARP bolt. It's not just a matter of having a different brand bolt in the rods; these bolts are low quality in many ways. They have been known to fail in engines to a much greater degree than a high quality rod bolt, and this failure usually causes catastrophic damage in the engine. Beware of rods that don't mention the rod bolt brand. As far as we're concerned, ARP bolts are the only brand we would ever use or accept in a set of rods.
ATI SUPER DAMPER SFI INCLUDED.
INTERNALLY BALANCED, SFI rated, 6.325" DIAMETER REDUCED ROTATIONAL MASS, OFFERS EXCELLENT CLEARANCE.
BILLET ALUMINUM TIMING POINTER. FEW SELLERS FINISH OFF THEIR TURN KEY ENGINES AS WE DO.
We did not offer this billet timing pointer in the past. However, we noticed that there was a birds-eye view of the timing pointer from the driver side of the engine, so we decided to use these on all of our engines.
HEAVY DUTY SFI RATED FLEXPLATE MADE IN THE USA INCLUDED.
This SFI flexplate is made in the USA and will resist cracking and warpage to a very high degree. One good telltale in identifying a low quality flexplate is the lack of welding on each side where the plate mates to the ring gear. They usually have a pale grey color to them, as they are not coated, and will rust quickly. Ours are welded on both sides, and are much thicker than an OE plate, and are zinc dichromate coated.
We do offer this engine with a manual flywheel. In most cases we do have both sizes, 153 and 168 tooth, available.
Our CWT 5500 Balancer.
We do our own balancing with our new state of the art CWT 5500 Series balancers. The CWT 5500 is the ultimate for precision balancing. We now have three of these in our machine shop. We consider this machine to be highly advanced compared to the Hines balancer we once used. We balance every rotating assembly we sell within 2 grams or less at no extra charge. A balance sheet is included with your engine.
Three new CWT balance machines under one roof is a rare sight.
Our crew wrapping up for the day. Pardon the mess.
AFR FULLY CNC'D 220cc HEADS, depending on cam choice.
The AFR heads are the best aftermarket cylinder heads in the world. Quality, performance, and reliability are excellent.
Head gaskets are Fel Pro 17031 premium race grade series, and ARP head bolts, and rocker studs.
ARP HEAD BOLTS AND WASHERS.
Scorpion Race series 1.5 OR 1.6 ratio roller rockers with 7/16 ARP rocker studs. We recommend the 1.5 ratio for better low end response and extended valve train life.
THE BEST HIGH PERFORMANCE RACING ROCKER ARMS MANUFACTURED IN THE USA.
We were amazed at the low level of sound produced in the valve train when we did a test run using our first set of Scorpions. We attribute this quiet operation to the close tolerances in the trunnion section. The trunnion barrels are also micro polished.
The rockers have a lifetime warranty. The aluminum body is made from a 7000 series aircraft alloy. Most rockers have a considerable amount of side play in the trunnion section, and may have an excessive amount of needle bearing clearance. The Scorpion does not have much of a loose feel in the trunnion. Many round track and drag racers run these at very high rpm levels and even run them on solid roller setups. With the milder spring pressures of our engines, these rockers should last a lifetime.
All Scorpion Rockers Feature:
Needle Bearing Fulcrum and Roller Tip, Centerless Ground Trunnion, Centerless Ground Pin & Roller, Burr-Free Thru Hole in Trunnion, Large Machined Seat, Thick Walled Adjusting Nut, Pedestals Machined from Solid Steel, Black Oxide Coated Steel Parts, & 100% CNC Machined.
EDELBROCK SUPER VICTOR II INTAKE MANIFOLD FOR SBC CHEVY # 2892
We use Scorpion, Comp Ultra Pro Magnum, and Comp Gold Arc rockers in all of our engines. The difference in these compared to the low grade no-name rockers on the market is huge. Do a Google search on this subject and you will know then what we're talking about.
COMP Cams Short Travel Race Grade Hydraulic Roller Lifters 15853-16
HOWARDS .080 WALL CHROMOLY ONE PC. PUSHRODS
We use Howards brand premium pushrods in all of our engines. They are lightweight in design, yet very strong. Made in the USA from 4130 chromoly steel. Regular hardened pushrods will most likely flex in the engine when running above normal RPM ranges, and risk bending under high RPM. These do not have the welded ball on the end. We only use the swedged one pc. design, which is a well proven design far superior to the style many others use in engines. 4130 chromoly steel is also much stronger, and will resist flexing. When a pushrod flexes in the engine, you lose lift. Don't be misled by the term "hardened," as this is nothing more than a stock style low cost push rod. They will flex in the engine or possibly bend permanently.
We use Comp cams only in our engines.
Special Grind # 13459
PART NUMBER: 08-000-8-11321
110 lobe sep.
This cam will make its peak power right at 6600 rpm. The idle is very radical. Power comes in around 3000 rpm.
We recommend a stall converter of around 3000 or up to 3500, preferably closer to the high side of this range. Final gearing would need to be at 355 or higher if used in a car weighing more than 3400 lbs. A 373 final gear is most optimal with this cam, providing the car is reasonably light. This cam does make the most horse power but will trade off bottom end throttle response and low speed cruising in the low rpm range.
You would not be able to run an overdrive trans with this cam choice unless the rpm range in overdrive is approximately 2300 rpm. Valve train life is reduced with this cam as compared to the other choices. This would only be a concern for those wanting to drive their vehicles on long trips or with frequent use. This cam choice puts your setup into the Pro-Street league.
Drivability is fair at best with this cam. Those with an automatic trans in cars weighing 3300 lbs or more should have a 373 or higher gear if they chose this cam choice.
If you choose this engine it is highly recommended that you use the MSD Pro Billet distributor and MSD CDI unit. This is essential for improved idling and overall performance. If you do decide to use the MSD Pro Billet distributor, we suggest you use the black timing degree bushing to increase the initial timing and possibly the lighter springs to control how soon the total mechanical advance comes in. You may even "lock-out" the distributor, depending on your car's overall setup. Low speed cruising will be greatly improved, as well as high rpm operation.
Below are our dyno results on one of our 434 Pro Street engines. The horse power numbers will always improve anywhere from 5-10 more than what the dyno results show after the rings have fully seated. The carb used seemed to make a substantial difference compared to our last Pro Street 434. The Holley Ultra XP is an excellent choice. We gained about 18hp using this carb as compared to the same size Quick Fuel Q series 1000 cfm. This engine made 672hp at 6300 rpm. That's very impressive considering it's a pump gas engine with a hyd. roller cam.
Official Dyno report on our 434 Pro Street engine.
304 STAINLESS ALLEN HEAD INTAKE BOLTS ARE USED ON ALL OUR ENGINES.
Pictured below are some of our most popular valve covers. They are fabricated aluminum, and very high quality. You may select from any of the valve covers we have listed at no additional cost for your engine.
The satin covers below are by far the most popular.
Timing components: SA Gear 8999T billet double roller timing set.
Polished Aluminum Timing Cover.
We use the top of the line SA Gear timing set with a torrington bearing and rolon chain. The difference in quality is dramatic compared to the common low-cost timing set. The upper sprocket is made from billet steel and the lower is induction hardened with nine keyways. These sets are hand matched for selective sizing.
The cost on this high end timing set is approx $97.50, more than double the cost of the low level budget timing set used by many other engine builders. Should you ever want to confirm that this is what is actually in your engine, you can remove the timing cover, and you will see that this timing set is very different in appearance to the run of the mill low cost sets often used by others.
This timing set is offered in three different chain tension setups, allowing us to set it up perfectly every time. One more benefit is that timing accuracy is very precise and will remain that way. This timing set will likely last for the life of the engine. This is what you will find in most solid roller engines, as they have very high spring rates, and create an enormous load on the chain and gears, compared to non solid roller setups. It may seem like a bit of overkill to use such a high end timing set, but the versatility and extreme quality outweigh the cost, in our opinion.
Melling M-Select Oil Pump, and M-Select Drive rod with ARP stud.
The M-Select series oil pump by Melling has several important upgrades compared to the regular Melling M-55 Series. The gears are billet steel, and the body is stronger, coated with corrosion-resistant nitrite. This oil pump also includes the M-Select drive rod. Both components are far superior to the regular Melling oil pump and drive rods used by most other engine builders.
Champ premium oil pan.
The oil pans we use on all of our engines are made in the USA by Champ. The Champ oil pan has a full windage tray, crank scraper, and trap door. Threaded dipstick is included. Extreme duty pickup designed not to fail. The oil pan is made from a thicker than normal gauge material, and has embossed ribs in the body.
If your engine is equipped with the 7 qt. Champ oil pan, it has kickouts that swell outward approx. 3 inches on each side. If you think you will encounter clearance issues with the kickouts, we recommend opting for the stock appearing 5 qt. oil pan. The 5 qt. pan will still be a Champ pan and will have the windage tray and crank scraper. We strongly recommend reducing the amount of oil used in these oil pans by approx. 1/4th of a quart. Doing this may reduce the chance of oil leaks and reduce oil temps. The larger counter weights used on stroker crankshafts are why we recommend reducing the oil capacity in these engines. The higher capacity 7 quart oil pan is an optional upgrade on some of our engines.
To be clear on what we're saying, we would like to see you add right at 6.75 quarts of oil grand total in your engine and oil filter when using the higher capacity oil pan. When using the stock appearing oil pan, we would like to see you add right at 4.75 quarts grand total in your engine and oil filter.
Our engines include a dipstick. It's very important that you re-calibrate the oil level marking on the dipstick. This is due to the fact that the dipstick, oil pan, and block are all made from various manufacturers and we often see great variances. Couple this with the fact that you may be running a reduced amount of oil, and the "full" mark on the dipstick will most likely not indicate correctly. Once you have put a predetermined amount of oil in your engine, and run it for a few minutes, let it sit for awhile on level ground, check the oil, and mark your dipstick with a flat file to re-establish the full mark.
We do not use the knock off oil pan gaskets on the market. Felpro premium oil pan gaskets are used on all of our engines.
Pictured below is a file photo. The actual Felpro gasket used will be the correct model for this application.
Studded Mini Nut Set.
We use our premium studded mini nut set on all of our oil pans and valve covers. The nuts have a serrated face and built in washers. This is the ultimate set for securing the oil pan and valve covers to the engine and is far superior to the typical bolts used by most other engine builders. Our standard engine color is black. Custom paint work on engine blocks and oil pans is available as an optional upgrade. The pictures above and below are file photos to display the studded mini nuts. Other items seen in these pictures may not represent your actual engine.
We include an engine lift plate and heavy duty engine stand with casters with every engine we build.
We offer this engine with selected upgrades. Listed below are some of the most requested ones. Many not only improve performance, but further enhance the reliability and longevity of your engine, along with resale value. Most of these upgrades are low in cost considering the benefits they offer.
The Super Flow is the best dyno in the industry.
If you purchase a starter from us you will have to install it. There is no way for us to properly shim the starter (should it be needed) while the torque converter and transmission are not installed. The flexplate will change position when the transmission is installed and the torque converter is hooked up to the flexplate. Some flexplates have a slight amount of run-out/warpage when the trans. and torque converter are not connected to it. This makes correct starter installation difficult. Only when you have the torque converter mounted to the flexplate can you properly install and adjust the starter.
Suggestion: While the engine is out of the car, still mounted on the engine stand, bolt up your torque converter to the flexplate. This will flatten out the flexplate to a great degree. Then, mount your starter on the engine. This is the only time you will have a birds eye view of the starter gear and ring gear from the back of the engine. You can see ifthe proper amount of mesh is there.
It's possible that once the transmission is installed and the torque converter is hooked up to the flexplate, the position of the ring gear may move a slight bit more. The transmission shaft centers up to the torque converter, and this causes the flexplate to further change shape slightly. This may alter your initial starter adjustment, and if it does, you may need to do a light adjustment once the transmission is installed.
We strongly suggest using our Powermaster 9100 or 9400 starter on this engine. These starters have proven to be highly reliable, and offer excellent header clearance.
Our machinists each have many years of experience in building racing engines. This very critical work is done to exacting specs and with great care. Many vendors do not have machinists with the experience or the proper equipment that we are fortunate to have. We have built engines that cost upwards of $50,000. All of our engine builders have been in the engine machining and engine building line of work for their entire working lives. Their ages range from 40 to 67. We have a total of seven machinists/engine builders.
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