Stroke choice for turbo motor
So, I am building a twin turbo motor for 2020 Drag Week. I have a 1970 400 block bored 30 over with Program center caps, arp studs. I have, on order from Dave at SD Performance, a set of 95cc 325cfm Edelbrock round ports with a few turbo tricks including T washers.
My issue is rotating assembly choice. I have a very nice Crower billet 4.25 stroke crank and 6.800 Oliver rods on hand but from what I've been reading, everyone is suggesting a shorter stroke.
So what would be the disadvantage to me using the 4.25 combo, and the advantages to selling it and going with say a 4.0 stroke? Thanks for any input.
Erik
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1964 GTO
501, Edelbrock Heads NA, 3460 lbs.
9.76 @ 137mph
1971 Trans Am Lucy Blue, 11.56 @ 115
1966 LeMans. 462, SD prepped Kaufman D ports. 11.90 @ 112
1976 Trans Am twin turbo 462, SD Edelbrock heads 8.50@159
2009 G8 GT
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