HPFP at what point??

[DubED30]

At what point do I need to consider a HPFP??
I'm looking at Revo1, DV, probably Carbonio intake and a Cat back exhaust.  As there is a group buy on, I was thinking about the fuel pump.
Spent a hour on the "search" and trying to check other peoples specs, but still can not find a definitive answer.  I'm unlikely to go for the turbo back exhaust, IC etc so will not be going to Revo2 or 2+.
Any information gratefully received.

[bacillus]

You will only really need an uprated hpfp if you are running a stage 2+ map.

[revo carl]

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 :)

[vRS Carl]

What are the benefits?

Carl

[Hedge]

Without wishing to tread on Carl's toes I think even Revo stage 1 requests higher than stock rail pressures.

Remember this, not bad for stage 1.


PS. Not my car but we do know who. 

[RedRobin]

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 :)

....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

[KRL]

If you monitor your rail pressure VCDS engine block 230 you will see that the standard HPFP does struggle even at stage 1.  This will be very apparent if you are running a high boost setting.

[tony_danza]

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 :)

....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.

It is a well known issue, it has plagued the mapping of the 2.0T from day one and everyone has had to work around it.

You're looking at this from the wrong perspective. You don't NEED one because every tuner has mapped accordingly to work within the limits of the OEM pump.. It is the compromise the HPFP removes.

Now, I agree Robin. I've said I'm more than happy with stage2 for a long time but it has always niggled me that I know I'm near its limit..  Â£250 is a drop in the ocean for that peace of mind.

Lastly - I can't believe you're going for that APR propeganda and dismissing Carl's advice, I'm sure he doesn't care what pump you fit, he isn't getting the profit off it. Sure Autotech might have had a few bad uns early on, but that statement put out by JKM was a bit too far if you ask me. Autotech 100% addressed the issue.

I don't know of 1 failure, do you? I understand why JKM said what they said, and why they may not want to supply based on old events. But you can't completely write something off without first listening to those telling you the problem is no longer there.

Don't make me break out the Milltek/VWR not getting it right first time analogy again  

[DubED30]

Thanks for all the replys.  I guess paranoia plays a big part.

[vRS Carl]

As I said in the other thread I have had autotech internals in mine for over 40k with no issues

So they obviously did something right first time round. 

Carl  

[revo carl]

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 :)

....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.

Robin you can disagree with me all you like but the fact is that even with the car in it's stock guise is struggles to keep requested rail pressure, data logs prove this categorically.