059 Vortec head improvement on my stock 1991 305 TBI

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Mar 8, 2010 | 02:58 PM

Kevman

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From: Windsor Ontario

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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?

Mar 8, 2010 | 06:59 PM

john1483

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Re: 059 Vortec head improvement on my stock 1991 305 TBI

Quote:

Originally Posted by Kevman

Remember that u would also need Vortec specific intake manifold , ur stock one wont bolt up.

Mar 8, 2010 | 07:13 PM

Kevman

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From: Windsor Ontario

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

Quote:

Originally Posted by john1483

Remember that u would also need Vortec specific intake manifold , ur stock one wont bolt up.

oh yea, I seen it on Summit, $400. I'm considering an LT1 cam, too.

Mar 8, 2010 | 07:18 PM

Stephen

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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?

Mar 8, 2010 | 08:07 PM

Awesome-X

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From: Bloomfield, IN

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Re: 059 Vortec head improvement on my stock 1991 305 TBI

I was wondering the same thing, actually.

Mar 8, 2010 | 08:35 PM

Stephen

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From: Bertram (outside Austin), TX

Car: 87 GTA

Engine: L98

Transmission: 700R4

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.

Mar 9, 2010 | 06:05 AM

Kevman

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From: Windsor Ontario

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

Quote:

Originally Posted by Stephen

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.