All Things Mk5 > Performance Modifications
What upgraded HPFP are you running
fuscobal:
Alex, on a k04 car with S3 injectors, is there any benefit in increasing the pressure from 130bar to say 140bar if the HPFP allows it or there are other limitations (like maxxed out turbo, injectors...) that won't allow the power/torque to go up ?
vRSAlex:
Only if the injectors are maxed out at 130 bar. The extra pressure will allow more fuel. APR run 460 odd bhp on the S3 injectors at 150 bar.
Hurdy:
--- Quote from: vRSAlex on November 05, 2013, 11:52:02 am ---APR is tested to 150 bar as the stage 3 turbo kit runs a 150bar FPRV.
--- End quote ---
This is news to me. The last time I saw the fuel pump it had a smaller head on the piston which didn't have the chamfer. Also the last time I heard 140bar was what they tested at. Just looked on their website and looks like things have moved on. Thanks for the update Alex. Looks like the difference is just price point then. :happy2:
On a side note, It must also be fairly recently that APR started using the 150bar FPRV......probably since the stage 3 golf R development was completed. I know they have changed a few things like going back to S3/R injectors and removed the need for the LPFP as they had a few issues with the controller, specifically voltage related.
gazbutS3:
there doesn't seem to be much in it between the APR and LOBA pump except price, lets get a few miles on these LOBA pumps and see how they fair. If alls good it will be good to have a choice and maybe it will trigger APR into doing something about their price :happy2:
Shorty:
You can get 155 bar FPRV's from America, could run massive fuel pressure then on a LOBA or APR pump.
You could run a LOBA LO400 with standard injectors and no need to worry about bigger injectors..
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