Manifold recommendation - Pontiac GTO Forum
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post #1 of 4 (permalink) Old 12-02-2014, 07:54 PM Thread Starter
 
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Manifold recommendation

As I rebuild my '70 YS 400 block, I am trying to decide whether to go with and after-market intake manifold or stay with the original cast iron. I am installing Edelbrock Performer Heads and will use my correct Q-Jet Carb. (already rebuilt by Cliff).

Are there any real performance benefits to going with an aluminum manifold? (Performer) I know I would have to convert to an electric choke if I do and have heard mixed reviews on that. What about port matching/alignment?

Thanks
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post #2 of 4 (permalink) Old 12-02-2014, 10:39 PM
 
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Just my opinion, since you aren't concerned with originality I would go with edelbrock performer manifold and yes I would port match it and yes quadrajet carb all the way! my Pontiacs run well with this combo. not to mention the added bonus , weight savings!
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post #3 of 4 (permalink) Old 12-03-2014, 12:24 PM
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Pretty much any aftermarket intake manifold is a performance downgrade from the stock cast iron unit. The stock unit makes more power over a wider rpm range than 98% of the aftermarket intakes....and was designed by the factory specifically for this engine.
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post #4 of 4 (permalink) Old 12-03-2014, 02:47 PM Thread Starter
 
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Thanks guys,

I think I'll get it cleaned up and use it. I don't care too much about the weight. I'm saving a lot with the e-heads and don't think the difference should be too much. My car has AC anyway which I intend on getting in eventually so there is that weight too.
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