C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Ported intake manifolds

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Old Jan 11, 2012 | 05:58 AM
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Default Ported intake manifolds

I recently just bought headers for my 90 and was thinking about bying a ported TPI setup. My engine is stock but I do have muffler eliminators and not cats. I autocross the car and would like some more power but don't want to lose the torque that the TPI has to offer. What are your thoughts on getting an aftermarket intake that has been ported? I figured it would be a nice power gain from where I'm at now once I would install the headers and the intake manifold setup.
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Old Jan 11, 2012 | 10:20 AM
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your next cheapest horsepower upgrade would be 1.6 roller rockers.
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Old Jan 11, 2012 | 10:42 AM
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Originally Posted by steven mack
your next cheapest horsepower upgrade would be 1.6 roller rockers.


About 1/4th the price for 10-15hp.

LT intake is helpful too. 15-25 depending on how it's ported.
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Old Jan 11, 2012 | 11:32 AM
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You are going in the right direction. Would be nice to do the Cylinder Heads also cause you are getting more/smoother air in through the ported intake and runners but then when it hits the heads and those rough and small ports it kinda kills it. Kinda like pouring air into a megaphone then it comes out the other end into a straw. The headers are a great idea. Keep rolling Pipe
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