350 heads on a 305
04-04-2011, 10:49 AM
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Car: 1987 tpi camaro not sure of motor
Engine: 5.0 tpi
Transmission: 5spd
Axle/Gears: posi track rear end gears unknown
350 heads on a 305
well i have some 350 heads the casting number is #191 currently on the car i have some #416s. i am running the tpi setup and the base block is a l03 motor that was originally a tbi motor. Am i going to have issues if i run these heads on the motor with a tpi setup or am i going to have to do some tuning and what not? I did do a search about it and all i got was people arguing about who was right and who was wrong. Thanks again for all the help
04-04-2011, 10:55 AM
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Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Re: 350 heads on a 305
You're going to lose a ton of compression if you do that.
04-04-2011, 11:02 AM
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Car: 1987 tpi camaro not sure of motor
Engine: 5.0 tpi
Transmission: 5spd
Axle/Gears: posi track rear end gears unknown
Re: 350 heads on a 305
like how much compression and what kinda effect will that have on the motor
04-04-2011, 12:15 PM
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Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Re: 350 heads on a 305
You'll bring it from 9.3:1 to about 7.8:1, and it'll run like a lawn tractor.
04-04-2011, 02:53 PM
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04-04-2011, 07:19 PM
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Re: 350 heads on a 305
I must say I love the lawn tractor comment...!!! It's a great analogy... 
I guess you could always mill the heads to decrease the 64cc combustion chamber of the 350 head down to 58cc, but you would also have to mill the Intake to match it... then they would essentially became a matched pair because nothing else would work with them.
It's not hard to find 64cc 350 heads if you do alittle digging... Good Luck!
I guess you could always mill the heads to decrease the 64cc combustion chamber of the 350 head down to 58cc, but you would also have to mill the Intake to match it... then they would essentially became a matched pair because nothing else would work with them.
It's not hard to find 64cc 350 heads if you do alittle digging... Good Luck!
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