DynoSim combinations
From Crankshaft Coalition Wiki
m (→SBC pump gas street cruiser: remove broken link) |
m (Reverted edits by 71.236.213.218 (talk) to last revision by Cobalt327) |
||
| Line 30: | Line 30: | ||
===355 SBC street motor, budget build=== | ===355 SBC street motor, budget build=== | ||
| − | *Block: '68-'86 Chevy 350 Gen I bored +0.030". Check main bearing bore for round and parallel, align | + | *Block: '68-'86 Chevy 350 Gen I bored +0.030". Check main bearing bore for round and parallel, align hone or align bore as necessary to correct the bores and insure they are ''round''. Once the main bores are done, register the block from the main saddle and cut the block decks to square the block up and set the squish where you want it. Don't try to cut corners here, this lays the foundation for the work and parts to come. |
| − | *Crank | + | *Crank is the stock 350, 3.48" stroke, 2.450" main journal diameter. |
| − | * | + | *[http://www.competitionproducts.com/Custom-Rebuilt-GM-Rod-Chev-350-LJ/productinfo/804335/ Rebuilt rods] are sufficient for this build. If using an existing set of stock rods, ARP hardware and resizing is recommended. |
| − | **Scat makes a | + | **Scat makes a decent set of [http://www.summitracing.com/parts/SCA-25700P/ 5.7" forged rods] that are affordable. |
| − | *Pistons: [http://www.kb-silvolite.com/kb_car/performance.php?action=details&P_id=155 Keith Black hypereutectic], | + | *Pistons: [http://www.kb-silvolite.com/kb_car/performance.php?action=details&P_id=155 Keith Black hypereutectic], p/n KB193, 12cc D-cup, 5/64,5/64,3/16 rings. 1.561" compression height. Gap top ring 0.026", second ring 0.018". |
| − | * | + | *[http://www.competitionproducts.com/RHS-ProTorker-Vortec-Cast-Iron-Head-170cc_64cc-Bare-Each/productinfo/RHS12410/ RHS Pro Torquer Vortec] heads, p/n 12410, 2.02" intake, 1.60" exhaust. These heads will accept either conventional or Vortec type intake manifolds, they are drilled and tapped for both types. More on using an early style intake on a Vortec style head can be seen [http://www.crankshaftcoalition.com/wiki/Intake_manifold#Using_an_early_style_intake_on_an_aftermarket_Vortec-type_head '''here''']. |
| − | *Intake manifold: Dual | + | *Intake manifold: Dual plane, highrise such as the Edelbrock RPM p/n 7101, Weiand Stealth p/n 8016, Holley p/n 300-36 or Professional Products Typhoon. Check ebay and craigslist for used manifolds if your budget is tight. |
*Carburetor: Vacuum secondaries 750 CFM. | *Carburetor: Vacuum secondaries 750 CFM. | ||
| − | *Headers: 1 | + | *Headers: 1-5/8" primaries, long-tube. Install "X" pipe between collectors and mufflers. Run 2-1/2" pipe to the rear through mufflers of your choice. |
| − | *Camshaft: | + | *Camshaft: [http://www.compcams.com/Cam_Specs/CamDetails.aspx?csid=72&sb=0 Comp Cams 260H] flat tappet hydraulic, installed straight up. |
*Rocker Arms: 1.6 ratio on both intake and exhaust. | *Rocker Arms: 1.6 ratio on both intake and exhaust. | ||
*Static Compression Ratio: 9.6:1 | *Static Compression Ratio: 9.6:1 | ||
*Dynamic Compression Ratio: 8.4:1 | *Dynamic Compression Ratio: 8.4:1 | ||
| − | *Quench: 0.035" to 0.045". Zero piston deck height with 0.035" to 0.045" head gasket or 0.010" to 0.020" piston deck height with Victor Reinz | + | *Quench: 0.035" to 0.045". Zero piston deck height with 0.035" to 0.045" head gasket or 0.010" to 0.020" piston deck height with Victor Reinz p/n 5746 head gasket that compresses to 0.025". |
====Results==== | ====Results==== | ||
| Line 59: | Line 59: | ||
*5500 453 433 | *5500 453 433 | ||
*6000 450 394 | *6000 450 394 | ||
| − | Stock converter and stock rear gear will work, but would be more fun with a converter that stalls at 2000 to 2200 rpm and a 3.73 rear gear. | + | Stock converter and stock rear gear will work, but would be more fun with a converter that stalls at 2000 to 2200 rpm and a 3.73 rear gear. |
===383 SBC stroker 485 hp/496 ft-lbs torque=== | ===383 SBC stroker 485 hp/496 ft-lbs torque=== | ||
| Line 73: | Line 73: | ||
.700 257 185<br> | .700 257 185<br> | ||
| − | *This uses a 350 block bored to size, a 3.750" stroke crank and 5.7" rods. Scat makes a cast crank and capscrew I-beam rods that will work here. Have your machine shop | + | *This uses a 350 block bored to size, a 3.750" stroke crank and 5.7" rods. Scat makes a cast crank and capscrew I-beam rods that will work here. Have your machine shop sonic test the cylinder walls for thickness if the bores need to go more than 0.030" over. Smokey Yunick used to recommend a minimum cylinder wall thickness of 0.135" after boring and honing. |
*Heads: Racing Head Service Pro Action 180, 72cc chambers, 2.02" intake, 1.60" exhaust. | *Heads: Racing Head Service Pro Action 180, 72cc chambers, 2.02" intake, 1.60" exhaust. | ||
| − | *Pistons: Keith Black hypereutectic #KB134, 7cc flat-top, 5/64 | + | *Pistons: Keith Black hypereutectic #KB134, 7cc flat-top, 5/64-5/64-3/16 rings, 1.433" compression height. |
| − | *Intake manifold: Dual | + | *Intake manifold: Dual plane, highrise such as the Edelbrock RPM, Weiand Stealth or Professional Products Typhoon. |
*Carburetor: 850 cfm vacuum secondary. | *Carburetor: 850 cfm vacuum secondary. | ||
| − | *Headers: 1-3/4" primaries, long-tube | + | *Headers: 1-5/8" to 1-3/4" primaries, long-tube. Install "X" pipe between collectors and mufflers. Run 2-1/2" to 2-3/4" pipe to the rear through mufflers of your choice. |
*Camshaft: [http://www.compcams.com/Cam_Specs/CamDetails.aspx?csid=79&sb=0 Comp cams 12-212-2 Comp Cams hydraulic flat tappet], installed 2 degrees retarded. | *Camshaft: [http://www.compcams.com/Cam_Specs/CamDetails.aspx?csid=79&sb=0 Comp cams 12-212-2 Comp Cams hydraulic flat tappet], installed 2 degrees retarded. | ||
*Rocker arms: 1.6, lift at valve 0.512". | *Rocker arms: 1.6, lift at valve 0.512". | ||
| Line 113: | Line 113: | ||
===350 SBC L31 heads=== | ===350 SBC L31 heads=== | ||
| − | Flat tappet hydraulic cam, stock | + | Flat tappet hydraulic cam, stock self aligning (SA) rockers, some head work for better springs. |
| − | In this build, a tight budget is | + | In this build, a tight budget is called for. To that end, use stock self aligning rockers. Lift is under a half inch, so the SA rockers should be OK. Check to see if using a -0.050" lock will be needed to insure the valve tip sticks up far enough above the retainer so that the retainer top surface doesn't get loaded by the side rails of the rail rockers. More info on checking clearances, etc. under [[DynoSim combinations#Resources|'''Resources''']]. |
*Bore the block 0.030", use [http://www.kb-silvolite.com/test/kb_car/performance.php?action=details&P_id=155 '''these'''] or similar 12cc dished pistons w/5.7 rods. | *Bore the block 0.030", use [http://www.kb-silvolite.com/test/kb_car/performance.php?action=details&P_id=155 '''these'''] or similar 12cc dished pistons w/5.7 rods. | ||
| Line 125: | Line 125: | ||
*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 6 psi max at the inlet. | *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: | + | *Performer RPM Vortec w/natural finish: p/n 7116, w/EnduraShine finish: p/n 71164, w/polished finish: p/n 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" to 3" pipes to the rear through mufflers of your choice. | ||
*Use 2500 stall converter, shorter rear gears. | *Use 2500 stall converter, shorter rear gears. | ||
| Line 145: | Line 145: | ||
===350 SBC dual four barrels=== | ===350 SBC dual four barrels=== | ||
| − | * Pistons: flat-top, 7cc's, 1.561" CH | + | * Pistons: Keith Black flat-top, 7cc's, 1.561" CH 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. | *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. | + | *High leak-down rate flat tappet hydraulic lifters such as Crane p/n 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/ | + | *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". | *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. | *1-5/8" long tube headers. | ||
| Line 170: | Line 170: | ||
===400 SBC street/strip truck motor=== | ===400 SBC street/strip truck motor=== | ||
*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 p/n 9-400-3750-5700 cast steel Pro Comp crankshaft. |
| − | *Scat | + | *Scat forged I-beam 5.7" rods. |
*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. | *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. | *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. | ||
| Line 180: | Line 180: | ||
*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). | *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 [http://www.amazon.com/Barry-Grant-1...r/dp/B000CIN32M Speed Demon 750] (BG is now defunct, so a similar carb may be substituted). | *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). | ||
| − | |||
| − | |||
| − | |||
*Hedman [http://www.summitracing.com/parts/HED-69088 Elite headers], 1-3/4" primaries. | *Hedman [http://www.summitracing.com/parts/HED-69088 Elite headers], 1-3/4" primaries. | ||
| Line 222: | Line 219: | ||
*Around 3.50:1 rear gear | *Around 3.50:1 rear gear | ||
| − | *[http://www. | + | *This build uses bare [http://www.racingheadservice.com/ RHS heads]. They're inexpensive and they work good. They're filled out with good quality valves, etc. Or they can be bought assembled. |
| − | + | ||
| − | + | ||
| − | + | ||
*[http://www.summitracing.com/parts/HRS-110315-10/ Here's the cam] (installed retarded 2 degrees). | *[http://www.summitracing.com/parts/HRS-110315-10/ Here's the cam] (installed retarded 2 degrees). | ||
| − | *[http://www.summitracing.com/parts/HRS-91164N/ Roller lifters | + | *[http://www.summitracing.com/parts/HRS-91164N/ Roller lifters]. |
| − | + | *Use a [http://www.daymotorsports.com/proddisp.php?ln=16665&product=HOWARDS+COMPOSITE+DISTRIBUTOR+GEARS&partnumber=HWD-94402&description=Make+bronze+distributor+gear+wear+a+thing+of+the+past!+NASCAR-proven+technology+ Howards p/n 94402 composite distributor gear], it will outlast a bronze gear 3 to 1. | |
| − | *Use a | + | |
====Results==== | ====Results==== | ||
| Line 265: | Line 258: | ||
Crane's description says this cam needs a 2500 converter, but with the amount of torque the engine will make down low a stock converter and a 3.50 gear will suffice. The lobe separation angle of 106 degrees will help make the bottom end torque that's needed for a stock converter and 3.5:1 range rear gears. The 0.450" lift will work with the stock springs and retainers. Be sure to use feeler gauges between the spring coils at full valve lift to insure that the springs don't stack solid. In theory, they shouldn't, but they have to be checked to be sure. Use 16-18 degrees of initial advance with an additional amount of mechanical advance to bring the total initial and mechanical to 34 degrees. That's all you need with these heads. You need more at the crank than you would with a stock cam though, for the motor to idle properly. We need to bring the idle down for use with a stock converter so we don't have to stand on the brake pedal at stoplights. See [[Hot rodding the HEI distributor]] for details on this and for using a vacuum advance. | Crane's description says this cam needs a 2500 converter, but with the amount of torque the engine will make down low a stock converter and a 3.50 gear will suffice. The lobe separation angle of 106 degrees will help make the bottom end torque that's needed for a stock converter and 3.5:1 range rear gears. The 0.450" lift will work with the stock springs and retainers. Be sure to use feeler gauges between the spring coils at full valve lift to insure that the springs don't stack solid. In theory, they shouldn't, but they have to be checked to be sure. Use 16-18 degrees of initial advance with an additional amount of mechanical advance to bring the total initial and mechanical to 34 degrees. That's all you need with these heads. You need more at the crank than you would with a stock cam though, for the motor to idle properly. We need to bring the idle down for use with a stock converter so we don't have to stand on the brake pedal at stoplights. See [[Hot rodding the HEI distributor]] for details on this and for using a vacuum advance. | ||
| − | To the long block, add an Edelbrock Performer RPM intake manifold and top it off with a rebuilt | + | To the long block, add an Edelbrock Performer RPM intake manifold and top it off with a rebuilt [http://www.edelbrock.com/automotive_new/mc/carbs_acc/carbs_access_main.shtml Edelbrock] Thunder series AVS 650 CFM manual choke carburetor, p/n 1805. Also get the Edelbrock choke cable p/n 8013. |
Mount a 14" x 4" air filter on top. Stack two 14 x 2's if you can't find a 4" thick element. This (and any) motor needs to breathe. Bolt on a pair of long-tube 1-5/8" to 1-3/4" headers and connect the two sides of the exhaust system by using either an X or an H pipe right after the collectors. Use the mufflers of your choice. | Mount a 14" x 4" air filter on top. Stack two 14 x 2's if you can't find a 4" thick element. This (and any) motor needs to breathe. Bolt on a pair of long-tube 1-5/8" to 1-3/4" headers and connect the two sides of the exhaust system by using either an X or an H pipe right after the collectors. Use the mufflers of your choice. | ||
| Line 283: | Line 276: | ||
There you have it boys and girls, a tire-shredding motor with a "flat-as-a-table" torque curve and a cam that will have a slightly rough idle so the OP can pose cool down at the Sonic Drive-In. | There you have it boys and girls, a tire-shredding motor with a "flat-as-a-table" torque curve and a cam that will have a slightly rough idle so the OP can pose cool down at the Sonic Drive-In. | ||
| − | When using a flat tappet cam, break in is uber important. Read up on what to do and how to do it [http://www.crankshaftcoalition.com/ | + | When using a flat tappet cam, break in is ''uber'' important. Read up on what to do and how to do it [http://www.crankshaftcoalition.com/wiki/Camshaft_install_tips_and_tricks '''here''']. |
| − | + | ||
===350 SBC- Cheap to build/regular fuel street motor=== | ===350 SBC- Cheap to build/regular fuel street motor=== | ||
| Line 295: | Line 287: | ||
*Makes 365 hp @ 5000 rpm with a double torque peak of 420 ft/lbs @ 3500 and 4000 rpm. Should make this power on regular pump gas without detonation and make for a real nice daily driver motor. | *Makes 365 hp @ 5000 rpm with a double torque peak of 420 ft/lbs @ 3500 and 4000 rpm. Should make this power on regular pump gas without detonation and make for a real nice daily driver motor. | ||
*The cam begins making power at 1200 rpm, so there's little need for a looser converter. A 2000 stall converter would be all that wouold be needed to keep the car from creeping at stoplights and also to get up into the 1500 rpm bottom range of the intake manifold at the hit of the throttle. | *The cam begins making power at 1200 rpm, so there's little need for a looser converter. A 2000 stall converter would be all that wouold be needed to keep the car from creeping at stoplights and also to get up into the 1500 rpm bottom range of the intake manifold at the hit of the throttle. | ||
| + | |||
| + | ==Comp Cams free simulation program== | ||
| + | *[http://www.compcams.com/camquest/default.asp Camquest], Comp Cams engine simulation program | ||
==Resources== | ==Resources== | ||
| − | *[[Valve spring | + | *[[Valve spring tech]] |
*[[Valve train geometry]] | *[[Valve train geometry]] | ||
*[[Valve train points to check]] | *[[Valve train points to check]] | ||
| Line 304: | Line 299: | ||
*[[Drilling steam holes in smallblock Chevy heads]] | *[[Drilling steam holes in smallblock Chevy heads]] | ||
*[[Camshaft install tips and tricks]] | *[[Camshaft install tips and tricks]] | ||
| − | *[[Computer dyno simulation and engine building software]] | + | *[[Computer dyno simulation and engine building software]]<br> |
| + | {{!}}Return to [[DynoSim combinations#350 SBC L31 heads|'''''350 SBC L31 heads''''']] | ||
| + | |||
[[Category:General hotrodding]] | [[Category:General hotrodding]] | ||
[[Category:Engine]] | [[Category:Engine]] | ||
Your Privacy Choices