All Things Mk5 > Performance Modifications
HPFP at what point??
RedRobin:
--- Quote from: revo carl on January 21, 2010, 09:36:58 am ---
but..... even in the car's stock guize it will benifit from a HPFP as the stock item isn't fully up to the job, so again the car will benifit with stage1 also :)
--- End quote ---
....I can't say I agree with you. If you were right, it would be a very well known issue by now, rather like the oem DV was.
Obviously, an aftermarket HPFP (On JKM's advice I favour the APR over the Autotech) has benefits but unless Stage2+ or if experiencing misfires/fuel-cuts I don't think it's necessary.
RedRobin:
....
We know that the Revo2+ map needs a HPFP, but does an aftermarket HPFP really need Stage 2+?
Other than solving potential misfires/fuel-cuts, what are the benefits of an aftermarket HPFP?
Janner_Sy:
when even revo carl states it is a good idea even at stage 1, must mean something especially as he wont gain anything by saying that
Hedge:
Actually High Pressure Fuel Pump is a bit of a mis-nomer.
They actually squirt a higher volume of fuel into the same size fuel rail which has the result of raising the rail pressure.
By making more fuel available it can fatten up the torque curve provided the engine is getting enough air irrespective of which variant of stage1/2/2+/3 you have.
See the stage 1 plot from above.
gazbutS3:
I ran the APR pump at stg1 for a week or so and it deffo made a difference, the throttle response seemed crisper throughout the rev range
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