305 heads on a 350
02-22-2007, 03:22 PM
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Car: 91 z28, 07 trailblazer ss
Engine: lt1lt4 hot cam,ls2
Transmission: t56
Axle/Gears: 3.73
305 heads on a 350
i have a 89 tpi motor and was wandering if using 305 tpi heads would do me any good or just stick with the ones i have
02-22-2007, 06:44 PM
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Car: Cobalt SS/SC and 88 IROCZ
Engine: 383 TPI
Transmission: 700R4
Axle/Gears: 3.73 Eaton Posi
it would raise compression and it would then cause you to have to use higher octane fuel. personally i would stick with what you have with the price of gas now a days
02-23-2007, 07:07 AM
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Car: 92 GTA/ 00 TA
Engine: 383/350
Transmission: 700R4/T-56
Do you have access to a datalogging tool? You'd only need higher octane gas with the 305 heads if you start detonating.
Old schoolers used to throw 305 heads on 350's all the time.
Detonation is the only thing you'd have to worry about. Maybe you could retard your timing a bit to help alleviate that worry.
Old schoolers used to throw 305 heads on 350's all the time.
Detonation is the only thing you'd have to worry about. Maybe you could retard your timing a bit to help alleviate that worry.
02-23-2007, 08:00 AM
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Car: Cobalt SS/SC and 88 IROCZ
Engine: 383 TPI
Transmission: 700R4
Axle/Gears: 3.73 Eaton Posi
Do you have access to a datalogging tool? You'd only need higher octane gas with the 305 heads if you start detonating.
Old schoolers used to throw 305 heads on 350's all the time.
Detonation is the only thing you'd have to worry about. Maybe you could retard your timing a bit to help alleviate that worry.
Old schoolers used to throw 305 heads on 350's all the time.
Detonation is the only thing you'd have to worry about. Maybe you could retard your timing a bit to help alleviate that worry.
02-23-2007, 10:23 AM
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Car: 91 z28, 07 trailblazer ss
Engine: lt1lt4 hot cam,ls2
Transmission: t56
Axle/Gears: 3.73
ah that idea just died.i found a set of vortec heads for 200 with no miles. thanks for the help
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