350 engine swap: Power loss at higher RPMs
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Junior Member
Joined: Jan 2009
Posts: 16
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From: Chicago, IL
Car: 1987 Camaro Z28
Engine: 350 TPI
Transmission: 700R4
350 engine swap: Power loss at higher RPMs
I have an '87 Camaro Z28 TPI in which I replaced the 305 for a 350 (block and heads).
The only other parts that I've switched out to upgrade for the 350 are the Knock sensor and the fuel injectors. Everything else is the same (maybe replaced or cleaned but still the same) the computer, the intake, all other sensors, etc. Whenever I open it up it does incredibly at first, it has great power. Then as it gets up to about 3000/3500 RPMs the power dies off incredibly. It still sounds great and doesn't seem like it's missing any cylinders but I get Honda Accords that begin to zip past me.
Are there any parts (sensors, computers) that I have missed in order to make it complete? I'm completely out of ideas...
The only other parts that I've switched out to upgrade for the 350 are the Knock sensor and the fuel injectors. Everything else is the same (maybe replaced or cleaned but still the same) the computer, the intake, all other sensors, etc. Whenever I open it up it does incredibly at first, it has great power. Then as it gets up to about 3000/3500 RPMs the power dies off incredibly. It still sounds great and doesn't seem like it's missing any cylinders but I get Honda Accords that begin to zip past me.
Are there any parts (sensors, computers) that I have missed in order to make it complete? I'm completely out of ideas...
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Joined: Nov 2001
Posts: 2,428
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From: Fairview Heights Illinois
Car: 1986 Irocz
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: 3.25:1
Re: 350 engine swap: Power loss at higher RPMs
Do some datalogging to see what's going on with it. It may end up being something mechanical.
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theshackle
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Sep 17, 2020 08:26 AM
