All Things Mk5 > Performance Modifications
Hpfp upgrade
Marshall:
APR use a different design piston and use an uprated seal to ensure no fuel goes into the engine oil.
Have a great reputation for reliability too.
But yes all pumps start as a oem pump.
Sent from my iPhone
E30Dom:
I thought then machined internals to really high tolerances and fit new seals and suited pistons etc... well worth the money for the reliabilty...
As for making a difference on stage 2, I think it just smooths out the power delivery, making sure it meets requested fuelling, so does run better. I know after going stage 2 with a ITG Panel filter and 3"/200CEL downpipe I dropped power to 272bhp(289bhp stage 1) and fitted the APR pump, EVOMS and BCS Exhaust and now at 310bhp... think that's more down to the EVOMS though as it derestricted it...
I hope to go stage 2+ though where the fuel pump will come into it's own... :)
scopes:
--- Quote from: kevs fr on September 30, 2012, 09:14:58 am ---APR use a different design piston and use an uprated seal to ensure no fuel goes into the engine oil.
Have a great reputation for reliability too.
But yes all pumps start as a oem pump.
Sent from my iPhone
--- End quote ---
Why is it known for other internals to let fuel in to the oil ?
RedRobin:
--- Quote from: scopes on September 30, 2012, 11:54:08 am ---
--- Quote from: kevs fr on September 30, 2012, 09:14:58 am ---
APR use a different design piston and use an uprated seal to ensure no fuel goes into the engine oil.
Have a great reputation for reliability too.
But yes all pumps start as a oem pump.
--- End quote ---
Why is it known for other internals to let fuel in to the oil ?
--- End quote ---
....At the risk of appearing to trash the reputation of Autotech internals just because I have an APR pump (I am just reporting and have no such intentions):
There has been a case of a car with Autotech internals catching fire and getting wrecked. Investigations showed that the pump's failure started the fire. I don't know of any other similar cases but that doesn't mean that there aren't any.
For anyone who does decide to buy Autotech pump internals I would advise buying them new and also buying a brand new OEM pump to install them in and have it done by an expert.
RedRobin:
--- Quote from: E30Dom on September 30, 2012, 09:45:37 am ---
As for making a difference on stage 2, I think it just smooths out the power delivery, making sure it meets requested fuelling, so does run better.
--- End quote ---
.... x 2
I found that with my K03 Mk5 GTI running on Revo Stage 2 with Twintake and Milltek, the APR pump improved my AFR (shown on JKM's dyno-plot) and also cured an occasional hesitation when accelerating hard. Fortunately I didn't experience any fuel cuts but that problem is not uncommon.
As a direct consequence, JKM were able to increase my B/T/F setting and my car feels much stronger in the mid to higher range. In fact, when needed for a quick overtake, the acceleration from ~60 to ~95 astounds me! I strictly keep it under 100 in the UK.
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