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Johnny
Forums Junkie

Location:
Sydney, OZ
Registered:
May 2002

Re: how much to port, polish and shave 20V

Wed, 10 December 2003 05:55

Quote:

how much reliability and driveability are you willing to sacrifice?

None

Quote:

standard 4age extractors have been proven to be good enough up to 200 hp
20v exhaust manifold craps on the 4age one

Proven for 200Hp?? any exhaust can do that! they aren't like a turbo...a good exhaust enhances the power, eg Standard 20V 80hp, when we change the exhaust, we made 100Hp, this engine with a stocker bottom with a Yager head, very mild cams 250 deg, well? 120Hp... but with 120Hp at the wheels in an EP91 non-turbo, mate thats heaps... Perfectly legal, perfectly reliable. The $3000 I'm spending is cause I thrash the crap out of mine in the bush and it's very easy to 'slip up'.This will be on the upper end in scale of what can be done, especiallly when competing ARC F16, you have to look for Hp hence cost. Again rally car's Have to be register and have to be road legal, and I can drive it through Peak Hour M4 traffic without and have done so in current form.... The 7AFE I use currently For NSWRC makes 75kw at the wheels and as much torque as a WRX as still uses the Standard manifolds. I'm Postive that the 20V will eat this.

Quote:

92kw at the wheels mark, totally street driveable

How does and n/a 4AGE 160Hp(approx 120kw) at the wheels, total street driveable and it's a 16V. We've all Read Bills Webpage, and It's got even the best of us scratching our heads as Nothing Really special's be done.. Just headwork, TRD shim unders, GZE coils, MTX8 and 20V quads and 260 cams, standard bottom balanced. But from this Experience I will agree with Bill that a good 16V will produce more power than a 20V after tuning that thing....
Anyway, to answer the question of this thread....

Quote:

Head work will cost anywhere from $600-1500 pending on what you want. $800 for proper custom race headers, tuned to your engine... And all proven to make power...

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