DynoSim combinations
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*Peak BMEP 187.8 @4000 | *Peak BMEP 187.8 @4000 | ||
*This motor should be waaaaaay fun with a 4-speed or auto with a loose converter. | *This motor should be waaaaaay fun with a 4-speed or auto with a loose converter. | ||
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| + | This would be my recipe for a street/strip truck motor. | ||
| + | 400 block bored 0.030" and zero decked to the piston crowns, align honed main bearing bore. | ||
| + | Scat 9-400-3750-5700 cast steel Pro Comp crankshaft.... | ||
| + | http://www.race-mart.com/Scat_Manuf...-3750-5700.html | ||
| + | Scat Forged I-beam 5.7" rods.... | ||
| + | http://www.race-mart.com/Scat_Manuf...2-ICR5700P.html | ||
| + | Keith Black hypereutectic pistons 22cc dish to make 9.8:1 static compression ratio with 64cc heads... | ||
| + | http://www.summitracing.com/parts/UEM-KB168-030 | ||
| + | CompCams retro-fit hydraulic roller cam installed 2 degrees retarded... | ||
| + | http://www.summitracing.com/parts/CCA-12-430-8/ | ||
| + | Howard's retro-fit hydraulic roller lifters... | ||
| + | http://www.summitracing.com/parts/HRS-91164N/ | ||
| + | CompCams thrust button... | ||
| + | http://www.summitracing.com/parts/CCA-200/ | ||
| + | CompCams wear plate... | ||
| + | http://www.summitracing.com/parts/CCA-201/ | ||
| + | Edelbrock RPM intake manifold... | ||
| + | http://www.summitracing.com/parts/EDL-7101/ | ||
| + | Dart Iron Eagle Platinum 215 cast iron heads...price shown is for one head... | ||
| + | http://www.summitracing.com/parts/DRT-10521123P/ | ||
| + | Barry Grant Speed Demon 750... | ||
| + | http://www.amazon.com/Barry-Grant-1...r/dp/B000CIN32M | ||
| + | Jegs air filter base...run a hose from the base to your PCV valve... | ||
| + | http://www.jegs.com/i/JEGS/555/5003...roductId=751908 | ||
| + | Jegs air filter lid... | ||
| + | http://www.jegs.com/i/JEGS/555/5003...roductId=751908 | ||
| + | 14" x 4" paper element...snag the correct length stud and a wing nut from your local Ace Hardware... | ||
| + | http://www.shopping.com/Allstar-ALL...4hO3SNWw==/info | ||
| + | Hedman Elite headers, 1 3/4" primaries... | ||
| + | http://www.summitracing.com/parts/HED-69088 | ||
| + | *RPM HP TQ | ||
| + | *2000 154 405 | ||
| + | *2500 195 410 | ||
| + | *3000 250 438 | ||
| + | *3500 319 479 | ||
| + | *4000 386 507 | ||
| + | *4500 446 521 | ||
| + | *5000 486 511 | ||
| + | *5500 511 488 | ||
| + | *6000 515 451 | ||
| + | *6500 490 396 | ||
| + | L31 Vortec heads need a lot of work to get them to the point that you can make any power with them and use enough cam to make that power and it will take a lot of money. Start off with the correct heads to do the job in the first place. I did manage to make 450 hp and 482 ft/lbs of torque with a set on a 406, but that's a long ways from the 515/521 made with the "correct for the application" Dart heads. | ||
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| + | Use 16 degrees ignition lead at the crank and put another 18 degrees in at the distributor weights for a total of 34. If the motor needs a little more total, move the lead at the crank to 18 degrees. You will not need some Super-Slick, Double-Throwdown ignition system. A rebuilt GM HEI will work nicely. Roller lifters are heavy and will limit the RPM's to just over 6000 anyway, so you don't need fire above that anyway. | ||
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| + | Run a nylon or copper line from the carburetor inlet back to the firewall and up past the hood lip to the cowl of the truck. On the cowl, temporarily mount a mechanical fuel pressure gauge (0-15 psi) so that you can view it through the windshield as you drive. Regulate fuel pressure down to 5-5 1/2 psi. If you have too much fuel pressure, it will blow past the needle and seat in the bowl and into the intake manifold as raw fuel. This will cause you untold tuning nightmares, so get this under control first thing. DO NOT TAKE ANYBODY'S WORD FOR THE AMOUNT OF PRESSURE THEIR PUMP PUTS OUT. MONITOR THE GAUGE AND CHECK IT YOURSELF OR SUFFER THE CONSEQUENCES. | ||
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| + | The 400 block will require that you drill steam holes in the heads. Any manufacturer you buy from will drill them for you before they ship the heads to you. Install the heads with a head gasket that is designed for installation on a 400 block because the gaskets will also have steam holes in them from the manufacturer. Here is the procedure in the event you want to know how to do it... | ||
| + | http://www.gregsengine.com/converti...ads-to-400.html | ||
| + | Use a composition gasket that compresses to 0.039" or 0.040". With the zero deck of the block, this will put the piston crown at 0.039" to 0.040" from the underside of the cylinder head with the piston at TDC. This establishes your "squish" dimension at 0.039" or 0.040", which will optimize the motor for detonation-free operation on pump gas. | ||
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