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Wodjno
20-10-2003, 07:34 PM
does anybody know of the safe boost limit for the vr4 engine.. also what the present boost level is of the turbo's
BraindG
21-10-2003, 12:34 AM
stick with 13psi/0.9 bar, should suffice for the time being..
pjjohnson
21-10-2003, 09:03 AM
I've had it at 1.1 or 1.2 bar for years without engine problems. It doesn't hold the boost at high revs.
Standard is around .65 bar I think.
enigma
21-10-2003, 10:26 AM
Are you using an HKS FCD? Mine doesn't seem to work??
pjjohnson
21-10-2003, 12:28 PM
When I originally had the boost increased to 1.1 bar INSERT INTO post VALUES ( 16 psi) I didn't have a problem with fuel cut. Nothing was done to the ECU.

A 'specialist' jap tuner advised me that I was running the risk of fuel cut out, and sold me an HKS FCD to cure what was at the the time a non existent problem.

When it was fitted a started to get fuel cut !

Eventually it was sorted by the tuner, but I do not know if I've still got the FCD or not, I never saw it at the time, and I've never seen it since. Don't even know where it would be.