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rb20 wont run at 14psi?

dwhe009

By dwhe009,
in Engines & Forced Induction

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tomj Veteran

tomj

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to everybody who says put it on dyno,

I know this would be the best way to slove the problem but im the kind of guy that loves to solve problems myself and not just watch someone else do it. I would rather blow up the motor than have someone fix everything and not knowing exactly what was happening and what he did.  

The most fun about having a quick car is playing with it.

Thanks for all your help though

are you also the type of person who likes replacing thier own engine?

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dwhe009 Contributor

dwhe009

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tomj,

yeah sure, love pulling motors in and out and pulling them apart. I have a snatch block hanging from my garage all year round. still, it does not beat sex, i don't have a wank over cars like some do.

Can anyone verify that my fuel pressure is too low (50psi) at 15psi boost?

cheers

predator Grand Master

predator

Posted
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50psi is about right.. stock rail pressure is 38psi + 15psi boost = 53psi.. which is close enough as BHdave is saying also.. I think you may be adding the standard boost pressure there in your mind to whatever you are thinking... the workshop manual is saying 37.5 + 7 (stock boost) = close enough to 45 :rofl: .. where as 15psi + 38 = 53psi..

why you are trying to run 14psi+ on a stock intercooled, stock turbo (I assume?), stock ecu, rb20 is beyond me a bit.. but you can try.

tomj Veteran

tomj

Posted
Posted
tomj,

        yeah sure, love pulling motors in and out and pulling them apart. I have a snatch block hanging from my garage all year round. still, it does not beat sex, i don't have a wank over cars like some do.

Can anyone verify that my fuel pressure is too low (50psi)  at 15psi boost?

cheers

im not having a dig, but why go through all these headaches when one run could save you so much time stress and maybe an engine.

50psi seems about right though

dwhe009 Contributor

dwhe009

Posted
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predator,

I have a 600*400*80mm front mount, standard turbo, yes i know but im just playing till i find a rb25 turbo.

I did a search and rang around and the fuel pressuse is supposed 2 be 45psi +/- boost, ie 37.5psi at idle, and should be 60psi at 15psi boost. I can clearly see it rise to 60, then fall off to 50 at the higher revs.

In goes another pump, yay.

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