Thread: HP Question
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911st 911st is offline
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Join Date: Jan 2004
Location: Sacramento
Posts: 7,269
Stock 3.3 euro is about 300fwhp (no cat). Boost from .8 bar to 1 bar can add about 30hp, low restriction muffler say 10-15hp for a total of about 340fwhp or 290rwhp depending on the dyno.

You have the euro style headers and it looks like a sport muffler. Spending dollard there would be a dollars chasing a small about of improvement in boost response or HP. Not a lot of HP hiding there. However, the lower the back pressure at the muffler the faster you will get boost and the longer you will hold full boost up top.

Running 1 bar is ok on a cool day w a stock intercooler if you are very careful but not a great idea on a a hot day or if you have been sitting in traffic (heat soak).

I would keep boost under .85 bar until you can get an Inter-cooler. An inter-cooler is good for 30hp-35hp by creating a denser mix to pack into the cylinder. This will be your best single investment and return safe HP. This will get you in the 375fwhp or 325rwhp range which is about the limit of your 7006 turbo.

A 7200 would bring in your boost in about 3-400rpm sooner but will start to fall off a little early at 1 bar.

Next step is SC or C2 cams with larger intake ports and a bigger turbo. Best to put off doing this unless you do them all togeather. This also puts your transmission at much more risk.

Just my opinion.
Old 02-18-2009, 09:12 AM
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