DynoSim combinations
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====Results==== | ====Results==== | ||
| − | '''RPM HP TQ''' | + | :'''RPM HP TQ''' |
*2000 148 389 | *2000 148 389 | ||
*2500 188 395 | *2500 188 395 | ||
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====Results==== | ====Results==== | ||
| − | '''RPM HP TQ''' | + | :'''RPM HP TQ''' |
*2000 145 382 | *2000 145 382 | ||
*2500 185 390 | *2500 185 390 | ||
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*Cut top of guide for 0.550" play from bottom of retainer to top of guide seal. Pin the pressed-in rocker studs with [http://www.summitracing.com/parts/MRG-806G?autofilter=1&part=MRG-806G&N=700+4294746236+115&autoview=sku this kit]. | *Cut top of guide for 0.550" play from bottom of retainer to top of guide seal. Pin the pressed-in rocker studs with [http://www.summitracing.com/parts/MRG-806G?autofilter=1&part=MRG-806G&N=700+4294746236+115&autoview=sku this kit]. | ||
*Performance Distributors custom curved HEI distributor, [http://www.performancedistributors.com/gmssdui.htm p/n 12720], or [http://www.crankshaftcoalition.com/wiki/Hot_rodding_the_HEI_distributor '''build your own'''] from a GM HEI. | *Performance Distributors custom curved HEI distributor, [http://www.performancedistributors.com/gmssdui.htm p/n 12720], or [http://www.crankshaftcoalition.com/wiki/Hot_rodding_the_HEI_distributor '''build your own'''] from a GM HEI. | ||
| − | *Edelbrock RPM Vortec intake mounting a 750 vacuum secondary carb of your choice. Edelbrock, Rochester 5 psi max at the inlet, Holley | + | *Edelbrock RPM Vortec intake mounting a 750 vacuum secondary carb of your choice. Edelbrock, Rochester 5 psi max at the inlet, Holley 6 psi max at the inlet. |
| − | *Performer RPM Vortec w/natural finish: #7116, w/EnduraShine finish: #71164, w/polished finish: #71161 | + | *Performer RPM Vortec w/natural finish: #7116, w/EnduraShine finish: #71164, w/polished finish: #71161, or look for a used manifold on craigslist to save a few shekels. |
| − | + | *Long-tube 1-5/8" headers with X or H pipe right after the collectors, 2-1/2" to 3" pipes to the rear through mufflers of your choice. | |
| − | *Long-tube 1 5/8" headers with X or H pipe right after the collectors, 2 1/2" | + | |
*Use 2500 stall converter, shorter rear gears. | *Use 2500 stall converter, shorter rear gears. | ||
| + | ====Results==== | ||
:'''RPM HP TQ''' | :'''RPM HP TQ''' | ||
*2000 138 364 | *2000 138 364 | ||
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**Peak BMEP 184.5 @4000 | **Peak BMEP 184.5 @4000 | ||
| + | ===350 with dual four barrels=== | ||
| + | * Pistons: flat-top, 7cc's, 1.561" CH [http://www.kb-silvolite.com/kb_car/...php?action=comp p/n KB106-030] | ||
| + | *Heads: [http://www.summitracing.com/parts/EDL-5073/ Edelbrock E-Street] p/n 5073, 185cc intake runners, 70cc chambers, 9.53:1 SCR. Published flow was factored by 0.95 for this exercise. | ||
| + | *High leak-down rate flat tappet hydraulic lifters such as Crane 99377-16 Hi Intensity Hydraulic Lifters because we are going to use "too much" cam for the SCR. These lifters will reduce duration by 6-10 degrees under 3000 rpm for better bottom end torque. | ||
| + | *Cam: Crane [http://www.summitracing.com/parts/CRN-110591/ '''p/n 110591'''] Saturday Night Special flat tappet hydraulic, installed 2 degrees retarded. | ||
| + | *With pistons at 1.561", rods at 5.703" and crank radius at 1.740", the stack measures 9.004", so with a nominal 9.025" block deck height, you would need to make a cut of 0.021" to get to zero deck. A 0.040" compressed gasket would then put the squish at 0.040". | ||
| + | *1-5/8" long tube headers. | ||
| + | *Edelbrock 2x4 RPM intake manifold mounting two 500cfm carbs. | ||
| − | + | ====Results==== | |
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:'''RPM HP TQ''' | :'''RPM HP TQ''' | ||
*2000 145 381 | *2000 145 381 | ||
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**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. | ||
| − | + | ===400 SBC street/strip truck motor.=== | |
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*400 block bored 0.030" and zero decked to the piston crowns, align honed main bearing bore. | *400 block bored 0.030" and zero decked to the piston crowns, align honed main bearing bore. | ||
| − | *Scat | + | *Scat [http://www.race-mart.com/Scat_Manuf...-3750-5700.html p/n 9-400-3750-5700] cast steel Pro Comp crankshaft. |
| − | *Scat | + | *Scat [http://www.race-mart.com/Scat_Manuf...2-ICR5700P.html forged I-beam 5.7" rods]. |
| − | *Keith Black | + | *Keith Black [http://www.summitracing.com/parts/UEM-KB168-030 p/n UEM-KB168-030] hypereutectic pistons with 22cc dish to make 9.8:1 static compression ratio with 64cc heads. |
| − | + | *Comp Cams [http://www.summitracing.com/parts/CCA-12-430-8/ p/n CCA-12-430-8] retro-fit hydraulic roller cam installed 2 degrees retarded. | |
| − | *Howard's | + | *Howard's [http://www.summitracing.com/parts/HRS-91164N/ retro-fit hydraulic roller lifters]. |
| − | * | + | *Comp Cams [http://www.summitracing.com/parts/CCA-200/ p/n CCA-200] thrust button. |
| − | * | + | *Comp Cams [http://www.summitracing.com/parts/CCA-201/ p/n CCA-201] wear plate. |
| − | *Edelbrock | + | *Edelbrock [http://www.summitracing.com/parts/EDL-7101/ p/n EDL-7101] Performer RPM intake manifold. |
| − | *Dart Iron Eagle Platinum 215 cast iron heads | + | *Dart Iron Eagle Platinum 215 cast iron heads, [http://www.summitracing.com/parts/DRT-10521123P/ p/n DRT-10521123P] (price shown is for one head). |
| − | *Barry Grant | + | *Barry Grant [http://www.amazon.com/Barry-Grant-1...r/dp/B000CIN32M Speed Demon 750] (BG is now defunct, so a similar carb may be substituted). |
| − | *Jegs | + | *Jegs [http://www.jegs.com/i/JEGS/555/5003...roductId=751908 air filter base]. Run a hose from the base to your PCV system's clean air inlet on opposite side from the PCV valve. |
| − | *Jegs | + | *Jegs [http://www.jegs.com/i/JEGS/555/5003...roductId=751908 air filter lid]. |
| − | *14" x 4" | + | *14" x 4" [http://www.shopping.com/Allstar-ALL...4hO3SNWw==/info paper filter element]. Snag the correct length stud and a wing nut from your local Ace Hardware. |
| − | *Hedman | + | *Hedman [http://www.summitracing.com/parts/HED-69088 Elite headers], 1-3/4" primaries. |
| + | ====Results==== | ||
:'''RPM HP TQ''' | :'''RPM HP TQ''' | ||
*2000 154 405 | *2000 154 405 | ||
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*6000 515 451 | *6000 515 451 | ||
*6500 490 396 | *6500 490 396 | ||
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| − | + | {{Note1}} L31 Vortec heads need work to use enough cam to make really good power. This can run into a lot of money. It may be cheaper to start off with an aftermarket head in the first place. That said, using production Vortec heads this 406 SBC combo did make an estimated 450 hp and 482 ft/lb of torque. But using a set of Dart heads the same combo made 515 hp and 521 ft/lb torque. | |
| − | + | =====Timing===== | |
| + | Use 16 degrees initial timing advance and 18 degrees of mechanical advance 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 a high-dollar ignition system. A rebuilt GM HEI will work nicely. See '''[[Hot rodding the HEI distributor]]''' for more info. | ||
| − | + | =====Fuel pressure===== | |
| + | 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 assume that published pressures are correct- you need to verify the pressure by using a gauge. | ||
| − | + | 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 to 5-1/2 psi. | |
| + | =====Steam holes===== | ||
| + | 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 [http://www.crankshaftcoalition.com/wiki/Drilling_steam_holes_in_smallblock_Chevy_heads '''more info''']. | ||
| + | Use a composition gasket that compresses to 0.039" to 0.041". With the zero deck of the block, this will put the piston crown at 0.039" to 0.041" from the underside of the cylinder head with the piston at TDC. This establishes your "squish" dimension at 0.039" to 0.041", which will optimize the motor for detonation-free operation on pump gas. | ||
| − | + | ===Street cruiser running on cheapo pump gas=== | |
| − | + | ||
*375-400 horsepower, 425+ lbs/ft of torque with 9.0:1 static compression ratio. | *375-400 horsepower, 425+ lbs/ft of torque with 9.0:1 static compression ratio. | ||
*Stock converter | *Stock converter | ||
| − | *Mild cam (204-212 intake duration @0.050", 110 LSA) | + | *Mild cam (204-212 degrees intake duration @ 0.050" lift, 110 LSA) |
| − | *RPM intake | + | *Edelbrock Performer RPM intake |
| − | * | + | *750cfm carb |
| − | *1 5/8" long-tube headers | + | *1-5/8" long-tube headers |
| − | *3.50 rear gear | + | *Around 3.50:1 rear gear |
| − | + | ||
| − | + | *[http://www.competitionproducts.com/...tinfo/RHS12407/ RHS heads] (one bare head). They're inexpensive and they work good. | |
| − | * | + | *Then use one [http://www.competitionproducts.com/...oductinfo/8511/ valve kit] (fills 2 heads). |
| − | *Then | + | *One [http://www.competitionproducts.com/...ctinfo/42151-8/ guide plate kit] (fills 2 heads). |
| − | + | *And one [http://www.competitionproducts.com/...tinfo/134-7101/ rocker stud kit] (fills 2 heads). | |
| − | *And one | + | *[http://www.summitracing.com/parts/HRS-110315-10/ '''Here's the cam'''] (installed retarded 2 degrees), also see [http://www.competitionproducts.com/...info/110315-10/ '''this''']. |
| − | * | + | *[http://www.summitracing.com/parts/HRS-91164N/ Roller lifters], or |
| − | ''' | + | [http://www.competitionproducts.com/...ductinfo/91164/ '''these''']. |
| − | [http://www.competitionproducts.com/...info/110315-10/]. | + | *Use a Howards [http://www.competitionproducts.com/...ductinfo/94402/ composite distributor gear, it will outlast a bronze gear 3 to 1. |
| − | * | + | |
| − | + | ||
| − | [http://www.competitionproducts.com/...ductinfo/91164/]. | + | |
| − | *Use a Howards | + | |
| + | ====Results==== | ||
:'''RPM HP TQ''' | :'''RPM HP TQ''' | ||
*2000 148 390 | *2000 148 390 | ||
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*6000 355 310 | *6000 355 310 | ||
| + | ===400 SBC with Vortec heads=== | ||
| + | This combo is best at building a lot of torque in the 3,500 rpm range. L31 heads on a 406 will not lend themselves to top end hp, so use them where they work the best. On a 400 ci engine that will be to make biottom end and midrange torque. | ||
| − | + | *Keith Black hypereutectic pistons, [http://www.summitracing.com/parts/SCA-25700P/ p/n KB168-030]. | |
| − | + | *Scat Pro Stock 5.7" rods. These rods are clearanced for the cam right out of the box. Minimum clearancing may be necessary at the pan rail for the big end of the rods. | |
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| − | 6 | + | 6" rods can cause the wrist pin to get up into the oil ring land. This adds a little more complexity and more things to go wrong than if you were to use a 5.7" rod. |
| + | |||
| + | With nominal +/- 66cc heads (production head combustion chamber volumes are often larger than published data), these 22cc D-cup pistons will produce 9.6:1 static compression ratio. An added benefit is the tall 1.433" compression height, meaning less block deck to cut off to reach a target squish of 0.035" to 0.045". | ||
*http://www.summitracing.com/parts/UEM-KB168-030/ | *http://www.summitracing.com/parts/UEM-KB168-030/ | ||
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*[[Valve train points to check]] | *[[Valve train points to check]] | ||
*[[Quench]] | *[[Quench]] | ||
| − | + | *[[Hot rodding the HEI distributor]] | |
| + | *[[Drilling steam holes in smallblock Chevy heads]] | ||
| + | *[[Camshaft install tips and tricks]] | ||
| + | *[[Computer dyno simulation and engine building software]] | ||
| + | [[Category:General hotrodding]] | ||
[[Category:Engine]] | [[Category:Engine]] | ||
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