059 Vortec head improvement on my stock 1991 305 TBI
03-08-2010, 02:58 PM
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Car: 1987 Firebird Formula
Engine: 2004 LQ4
Transmission: T-5 WC
Axle/Gears: 3.42
059 Vortec head improvement on my stock 1991 305 TBI
I have a set of Vortec 059 heads, they need valve seals, and springs, but they're very clean. I'm considering putting them on my 305 TBI, as well as a set of short Hedman headers. What kind of improvement would I see from stock?
03-08-2010, 06:59 PM
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Re: 059 Vortec head improvement on my stock 1991 305 TBI
Remember that u would also need Vortec specific intake manifold , ur stock one wont bolt up.
03-08-2010, 07:18 PM
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Car: 87 GTA
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Transmission: 700R4
Axle/Gears: Dana M78 3.27 posi
Re: 059 Vortec head improvement on my stock 1991 305 TBI
To save $ & hit the road ASAP...Could you use a truck intake, that came stock on the Vortec engines?
Then just swap intakes, if you wanted to?
Then just swap intakes, if you wanted to?
03-08-2010, 08:35 PM
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Car: 87 GTA
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Axle/Gears: Dana M78 3.27 posi
Re: 059 Vortec head improvement on my stock 1991 305 TBI
I would wonder if the tuck manifold is too tall to fit the TBI under a 3rd gen hood?
We know that EGR crossover (i think it is) is an issue for Vortec heads on "standard" SBCs, so that would solve one issue.
We know that EGR crossover (i think it is) is an issue for Vortec heads on "standard" SBCs, so that would solve one issue.
03-09-2010, 06:05 AM
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Car: 1987 Firebird Formula
Engine: 2004 LQ4
Transmission: T-5 WC
Axle/Gears: 3.42
Re: 059 Vortec head improvement on my stock 1991 305 TBI
I was considering the aluminum one, and deleting the EGR from the PROM (My cousin knows how to do that stuff) It's the emmisions testing up here in Ontario that's worrying me though.
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