After watching some of my in car race videos last night I notice something with the 2 pump gas engines I ran last year.
Engine A is a .040 350 SBC flat top piston 9.75:1 compression
.600 lift roller cam with all related hardware
Mild ported Sportsman II 200cc heads
Modified Eddy Air Gap
850 FST VS
1 3/4 Hooker S/C headers
Best time was
1.55 60ft.
7.16 1/8 mile @95 mph
11.30@117.82 mph 1/4 mile with 4.88 gear and my 10" TCI race converter 72° day
Engine B is a .030 flat top piston 461 BBC 7.95:1 compression
Crower flat tappet (solid) .543/.595 243°/ 250° on a 106 lca
Ported 360 peanut port heads with 2.19 and 1.88 valves
Eddy Air Gap, 1000 Race Demon carb
1 3/4" headers
Best time was 1.52 60ft
7.04 1/8 @96mph
11.16@118mph 4.10 gear with my 8" TCI race converter 83° day
It is very surprising that the 2 engines one with over 100 cubes more with the bigger engine only having a slight advantage. I think with the 8" converter the 358 will be right on par with the 461. I love testing stuff like this as it does surprise people that the little engine can hang that well with the bigger stuff but it's all about the combination and nothing more. Future mods to these 2 engines are,
Ported L-29 Gen VI heads (on the engine now, 1 7/8" headers, 3.73 gearing and test out the FST 850 on the 461 BBC
Changes on the 358 are 8" converter, use the Ported Victor Jr. or my (don't laugh) ported old school "torker" intake manifold and possibly 2 different sets of heads.
Goal is to get both of these in the high 10's running on pump gas.
Then there's the Vortec 406 I ran in the high 10's back in 2019 just waiting to have the AFR heads and a roller cam test in that engine.
Engine A is a .040 350 SBC flat top piston 9.75:1 compression
.600 lift roller cam with all related hardware
Mild ported Sportsman II 200cc heads
Modified Eddy Air Gap
850 FST VS
1 3/4 Hooker S/C headers
Best time was
1.55 60ft.
7.16 1/8 mile @95 mph
11.30@117.82 mph 1/4 mile with 4.88 gear and my 10" TCI race converter 72° day
Engine B is a .030 flat top piston 461 BBC 7.95:1 compression
Crower flat tappet (solid) .543/.595 243°/ 250° on a 106 lca
Ported 360 peanut port heads with 2.19 and 1.88 valves
Eddy Air Gap, 1000 Race Demon carb
1 3/4" headers
Best time was 1.52 60ft
7.04 1/8 @96mph
11.16@118mph 4.10 gear with my 8" TCI race converter 83° day
It is very surprising that the 2 engines one with over 100 cubes more with the bigger engine only having a slight advantage. I think with the 8" converter the 358 will be right on par with the 461. I love testing stuff like this as it does surprise people that the little engine can hang that well with the bigger stuff but it's all about the combination and nothing more. Future mods to these 2 engines are,
Ported L-29 Gen VI heads (on the engine now, 1 7/8" headers, 3.73 gearing and test out the FST 850 on the 461 BBC
Changes on the 358 are 8" converter, use the Ported Victor Jr. or my (don't laugh) ported old school "torker" intake manifold and possibly 2 different sets of heads.
Goal is to get both of these in the high 10's running on pump gas.
Then there's the Vortec 406 I ran in the high 10's back in 2019 just waiting to have the AFR heads and a roller cam test in that engine.