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911st 911st is offline
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Join Date: Jan 2004
Location: Sacramento
Posts: 7,269
How much HP are you going for?

I am not a real expert.

I did read in Bruce Anderson's book that Protomotive used extrude honed alloy manifolds but if he needed more be went with the plastic one's and they were "12% more efficient" for what it is worth. He also shows a dyno sheet on a 3.8 TT he built that made 750hp.

If you manifold is set up for a 930 style intercooler it might be easier to go with the Blown Six C2 intercooler for a nice motor. Some have not been tottaly happy with there quality but the end tanks are a better design that most fabricated tanks.

There is a lot to making a big HP turbo that will live on the track. Keep it pulled back to a mild tune at say 500hp and you can have a lot of fun. Don't forget it takes a lot more cooling, clutch, brakes, transmission ....

A built NA 3.8 w sport cams, chip, headers in a light car could be a lot of fun and give even the largest turbos a fit on the track.

Me, I would love a set of PMO carbs on a 3.8 in a light car w great suspension.
Old 01-28-2010, 06:45 PM
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