Hi guys!
I'm worried with some HPFP modification I saw last weekend, and I'm asking for some advise from you.
The car is Euro A4 B8 1.8TFSI (Bosch closed style HPFP - not upgradable with different internals).
Two years ago I made for this friend moderated tune for K04-064 and it was working ok on the stock HPFP.
However it seems power is never sufficient, so now the car have proper BIG turbo, and because I mentioned to him fueling will be an issue they decide to put on the car HPFP from 2017 RS3 DAZA engine.
He told me this pump is good for over 700HP, our target is not more than 500, so should be enough.
Good thing is that control signal to HPFP should be the same like his old HPFP - car idles well (beside fuel pressure too high DTC error) - let's say that is fixable.
I start to look for parameters (piston diameter, cylinder volume) of this DAZA HPFP and unfortunately I can't find anything to starts with.
What really bothers me is that 1.8/2.0TSI EA888 gen2 HPFP have cam lobe with 3.5mm lift and I can see this in KLNEHDP in his original file.
However RS3 pump have 4.7mm and it is defined as such in KLNEHDP in every RS3 original file I could find.
It seems driving lobe of those two cars is totally different. Now I'm afraid RS3 HPFP will not make enough pressure with 1.2mm less push when paired with 1.8TSI driving lobe.
Am I right this will not end well paired with capable turbocharger?
Is there a way to use vacuum pump from different car, so we can get bigger stroke, more close to standard 4.7mm of RS3?
bosch hpfp same as cawb engine ?
this hpfp working different
replace new version same desing like ccz hpfp overheating
control different