20b Turbo Or N/a

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07-01-2003, 05:34 PM

WishIhadaRX7

Senior Member

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Join Date: Jun 2003

Location: Toledo, OH

Posts: 736

What I'm trying to ask is, if you got a 20b and you want to set it up as an n/a now, what all would you have to do to boost it later? I'm only concerned with the engine itself right now not the turbo, ic, piping, fuel maps, etc.

Thanks

07-02-2003, 01:22 AM

Jeff20B

Senior Member

Join Date: Nov 2001

Posts: 2,284

You'd want to leave the rotors as is. They have 9.0 compression which is close to 9.2 of the first 13Bs back in '74-'78. If you were going to run NA forever, I'd go with NA '89-'92 rotors which have something like 9.7. They'll still balance correctly with your counterweights.

My 20B is staying at 9.0 compression because I may one day supercharge or do a blow through turbo. Anything that's simple.