Mutiple RB20det questions

Discuss the RB20, RB25 and RB26 series engines.
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pilmpd
Posts: 108
Joined: Tue Aug 12, 2003 12:43 pm
Car: 1991 white 240sx hatch w/ rb20det and 1990 240sx hatch w/ka24de swap the "TERD"

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So ive got my rb in and running and driveable, but i have a few questions.I am using a z32 MAF and my car is running rich as dog balls. Has anyone else had a problem with their rb20 loading up on fuel at idle and partial throtle using a z32 maf? Also, how inaccurate is the ka tach when using the rb20 tach singal wire? Any help would be appreciated.

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pilmpd
Posts: 108
Joined: Tue Aug 12, 2003 12:43 pm
Car: 1991 white 240sx hatch w/ rb20det and 1990 240sx hatch w/ka24de swap the "TERD"

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I have one more question. How much vaccum are you all running at idle? I know that i have a vaccum leak somewhere but i cant seem to find out where. I have damn near pulled the engine back out just tring to find the vaccum leak.
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goofynick6
Posts: 1216
Joined: Thu Feb 05, 2004 9:58 am
Car: 1995 S14.5 RB20DET

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You can't just drop in a z32 maf and expect it to work. You have to use an SAFC, or PowerFC or an eprom chip to accomodate for it. KA tach is way off, like 1.5x higher until you take it apart and calibrate it.

Nick
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