Hi Guys

 

I'm thinking about fitting an adjustable fuel pressure regulator. I notice that three types seem to come up when doing a search on this forum and these are:

 

 

Cartech:

http://www.lextreme.com/FMU.htm

 

 

Nismo:

http://www.courtesyparts.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=22670-RR710US&Category_Code=

 

 

FSE power boost valve:

http://www.fuelsystem.co.uk/pbv.htm

 

Is the Nismo FPR rising rate like the other two?

 

Any comments or recommendations on the above would be much appreciated.

 

Cheers

 

Jon

You don't want a rising rate one. There's a throttle enrichment function in the ECU to give 'stab' enrichment. A rising rate regulator will just overfuel it with no benefit.

Go with the NISMO if you want one, it allows you to raise the base line pressure, but more importantly it retains the 1:1 fuel pressure : manifold pressure relationship.. It fits in the stock location too.

If your running Nismo 555's, is increasing the baselien pressure a necessity John?

 

Or is it dependant on your chip? JWT any good?

Thanks John. :)

If your running Nismo 555's, is increasing the baselien pressure a necessity John?

 

Or is it dependant on your chip? JWT any good?

 

Shouldn't be, it's more effective to squeeze a little more from the 370's. The JWT 555 chip is terrible IMO. Too lean in the mid range, too rich at the top.

OK, well I was told your theman to speak to so I'll PM you for some advice if thats ok?

Shouldn't be, it's more effective to squeeze a little more from the 370's. The JWT 555 chip is terrible IMO. Too lean in the mid range, too rich at the top.

 

Or even too lean,as i found out on my old Z :mad: not impressed.

 

Tony :)