305 Heads
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Joined: Dec 2010
Posts: 62
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From: Caro, Michigan
Car: 89 Camaro RS
Engine: 350 TPI
Transmission: 5 Speed
305 Heads
I have a 305 with TBI heads now with a TPI installed. I found a set of 416 305 ho heads rebuilt for 100. Would I see much power gain swapping to these heads? I'm currently running a LT1 cam also. Thanks
Joined: Dec 2004
Posts: 16,737
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: 305 Heads
The 416 flow better than tbi heads, just a guess they maybe worth 30hp at the flywheel.
You can run a Corvette TPI intake manifold or elongate the center four holes of the intake unless your using a 85 manifold.
You can run a Corvette TPI intake manifold or elongate the center four holes of the intake unless your using a 85 manifold.
Joined: Jan 2005
Posts: 10,404
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From: Hurst, Texas
Car: 1983 G20 Chevy
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 14 bolt with 3.07 gears
Re: 305 Heads
You will see very little in the way of HP gains even if you port the 416s. I would suspect less than 25 hp @ 5,500 rpm. You will see a power loss clear through 4,500 rpm.