Hi guys, I have a MAF TPI setup that I am going to be feeding a retrofitted muscle car era 327 with double hump fuelie heads and a moderately aggressive flat tappet cam. Does anyone have any tips, pictures, or web addresses I can check out for info on porting the plenum, runners, and/or manifold base for better flow at higher rpms? The 327 peaked at around 5500 rpms, and I'd shift at 6K with a Holley 600 DP. I'd like to get the TPI to pull strong to at least the 5000 mark with the stock tpi manifold.

 

The 327 and those heads are high reving, TPI isn't, in other words, TPI on that combo would be a bad match up. A better bet would be the LT1 intake, it will rev much higher than TPI and can be had for the same price or less than the TPI.

Talk to John Millican, he should be able to answer any questions you have about the swap.

 

Morley, I already have absolutely everything for the swap, down to the painless retrofit harness and all the sensors. I have $1100 into the whole deal, so I am going to use the TPI. I am just interested in porting the stock setup so I can run it until I have the money for aftermarket runners some day.

 

Well, the stock manifold doesn't have a lot of room for porting, do a search on siamesing the base manifold. the runners are too thin to port, except port matching. The plenum has room for porting, again a search on it here will give results.
The runners aren't the restriction, it is the base manifold and the whole TPI design, it was never intended to run high RPM, 4500 is about it. The LT1 is about the cheapest, most effective way to go for higher RPM.