4.2L FSI => 2.0L FSI HPFP. - Page 2 - VW GTI Forum / VW Rabbit Forum / VW R32 Forum / VW Golf Forum

xola3que · 05-17-2012, 03:00 PM

Emailing A_P_R for R8's HPFP fuel flow rate. Shsss... everyone be quiet! they sells fuel pumps too.

I guess another clue to found out the HPFP capacity would be the injectors flow rate. It's a direct comparison since the 4.2V8 is so similar to the 2.0L I4

4.2L S5 injector: PN: 079906036C
2.0L FSI injector PN: 06F906036A

The two parts, again, look identical.

AndoN · 05-17-2012, 03:27 PM

Quote:

Originally Posted by TheEnforcer98

How does this compare to the BPY pump?

I would like to correct myself. It is 136 bar and not 120. Our stock pump is 120.

TheEnforcer98 · 05-17-2012, 03:46 PM

Quote:

Originally Posted by AndoN

I would like to correct myself. It is 136 bar and not 120. Our stock pump is 120.

So, by your account of the fuel pump specs that you have (BTW where did you get them from? Just curious), it'd exceed the max requested bar on a stage 2+ APR tune?

xola3que · 05-17-2012, 03:50 PM

Quote:

Originally Posted by TheEnforcer98

So, by your account of the fuel pump specs that you have (BTW where did you get them from? Just curious), it'd exceed the max requested bar on a stage 2+ APR tune?

Would love to know where he got the data from too. May be I can do some homework myself.

TheEnforcer98 · 05-17-2012, 03:55 PM

Well the RS4 PRV cracks at 136 bar, soooo....

From my very short search on my shitty work computer, the APR stage 2+ requests 130 bar? Sooo... Buy $180 fuel pump, and buy RS4 PRV. Win.

xola3que · 05-17-2012, 04:01 PM

Quote:

Originally Posted by TheEnforcer98

Well the RS4 PRV cracks at 136 bar, soooo....

From my very short search on my shitty work computer, the APR stage 2+ requests 130 bar? Sooo... Buy $180 fuel pump, and buy RS4 PRV. Win.

Heh...I wish it's that simple.

I don't think there's a direct correlation between pressure and flow rate. A pump with 136 bar doesn't mean it will flow more...or does it?

AndoN · 05-17-2012, 04:03 PM

So I found a similar topic discussed and APR confirmed that it is 136 bar. check here : http://forums.fourtitude.com/showthr...ure-gt-120-bar

and also http://www.volkspage.net/technik/ssp/ssp/SSP_377.pdf ;

Strikered · 05-17-2012, 04:06 PM

This sounds great and all, but am I the only one to notice the "cap" on the pumps are different? (where the pressure relief valve is - there's 2 threaded "exits" on ours, and it looks like only one on the R8)

Could we mix and match parts between the pumps - like transferring the barbed fuel part to the R8 pump - to end up with a higher flow "OEM" pump?

You would assume they just modified the internals to match the flow required by each engine...this would be great for the VW enthusiast community!

Alik4041 · 05-17-2012, 04:30 PM

I simply have my doubts about this and honestly don't think it will come out in our favor.

xola3que · 05-17-2012, 04:38 PM

Quote:

Originally Posted by Alik4041

I simply have my doubts about this and honestly don't think it will come out in our favor.

partycrasher type..eh?

I'm doing the research and look at the numbers. Worst thing, I could just buy the 4.2L pump for $189 and do a detail analysis to put this at rest. May be try to install and do a vagcom run at WOT to see if the fuel cut out. If things doesn't fit at the first try, no worries, I can still return the pump for 100% store credit. But if it does, FUCK OFF APR!!!!

If the Q7 pumps fit the 2.0FSI with little mods, I will seriously try out the 4.2 and 5.2 R8's next. Let's just hope it's cheaper than APR pump.

Alik4041 · 05-17-2012, 04:57 PM

Haha sorry if I sounded like buzzkillington! I just think that the stock 4.2L has dual pumps for a reason. I doubt that it will be able to supply that much more than our pumps. If it does, fitment will be the next issue as I'm sure you will not be able to simply swap the pumps. Internals will need to be changed. I'm wondering why our HPFP is worth 2x the cost of the 4.2L though.

The Fed · 05-17-2012, 05:08 PM

Does APR have a tune for the 4.2? I'm too lazy to look.

xola3que · 05-17-2012, 05:13 PM

they do, Stage1 only

The Fed · 05-17-2012, 05:26 PM

How much HP does it put out? Much less than twice a Stage 1 GTI, so I don't think a 4.2 pump flows much. And do both 4.2 pumps only have one fitting?

Arin@APR · 05-17-2012, 05:30 PM

The 4.2L FSI V8 pump internals are identical to the 2.0T FSI.

Alik4041 · 05-17-2012, 05:38 PM

/thread

xola3que · 05-17-2012, 09:00 PM

bummer...
that's two birds shot for APR w/ the 4.2L HPFP
@ Arin, R8's HPFP is the same as all other 4.2L?

Arin@APR · 05-17-2012, 09:34 PM

Quote:

Originally Posted by xola3que

bummer...
that's two birds shot for APR w/ the 4.2L HPFP
@ Arin, R8's HPFP is the same as all other 4.2L?

Yes, the R8 pump is the same. Trust me, in 2006 or so this was all the rage. We already had the technical drawings showing the pumps were the same size but we bought and tried them anyways.

AndoN · 05-18-2012, 09:44 AM

It's good to have clarification now. Thanks Arin.

JPBlair87 · 05-18-2012, 11:35 AM

So whats the verdict on this??

Sent from my mind via mental projection

xola3que · 05-18-2012, 11:39 AM

verdict
4.2LFSI pump is 95% same as 2.0LFSI and there's no benefit mounting the 4.2Ls on the GTI. I still have to see what the 5.2L HPFP like and see if that worths a shot.

Qwoz · 05-18-2012, 12:45 PM

Well there goes my hopes and dreams of going 2+ this summer....

05-17-2012, 03:00 PM	#23
xola3que euroturd Drives: 2008 Golf Join Date: Mar 2008 Location: Morristown, NJ Posts: 1,791	Emailing A_P_R for R8's HPFP fuel flow rate. Shsss... everyone be quiet! they sells fuel pumps too. I guess another clue to found out the HPFP capacity would be the injectors flow rate. It's a direct comparison since the 4.2V8 is so similar to the 2.0L I4 4.2L S5 injector: PN: 079906036C 2.0L FSI injector PN: 06F906036A The two parts, again, look identical. Last edited by xola3que; 05-17-2012 at 04:29 PM.

05-17-2012, 03:55 PM	#27
TheEnforcer98 FIA World Rally Car Champion Drives: 01 BT 225 TT Quattro Coupe Join Date: Jul 2010 Location: Pittsburgh, PA Posts: 660	Well the RS4 PRV cracks at 136 bar, soooo.... From my very short search on my shitty work computer, the APR stage 2+ requests 130 bar? Sooo... Buy $180 fuel pump, and buy RS4 PRV. Win. __________________ Pittsburgh Area VW VAG's Facebook Group DUBurgh.com A website for VW and Audi enthusiasts in the Greater Pittsburgh Area

05-17-2012, 04:06 PM	#30
Strikered Touring Car Champion Drives: 2007 MK5 GTI Join Date: Dec 2009 Location: Seatown Posts: 223	This sounds great and all, but am I the only one to notice the "cap" on the pumps are different? (where the pressure relief valve is - there's 2 threaded "exits" on ours, and it looks like only one on the R8) Could we mix and match parts between the pumps - like transferring the barbed fuel part to the R8 pump - to end up with a higher flow "OEM" pump? You would assume they just modified the internals to match the flow required by each engine...this would be great for the VW enthusiast community! __________________ APR Stage 2+ - HPFPUpgrade S1 Pump - 42DD Catted & Resonated DP - BSH True-Seal Intake - Neuspeed TDP - Rev "D" DV - BSH Stage 1 PCV - AWE Boost Gauge (M) - Koni FSD & Eibach - Votex Lip - Thule Rack (SB) - 19" VMR 710's (Silver)

05-17-2012, 05:08 PM	#34
The Fed Old Guys Rule Drives: 2007 GTI DSG APR S1 Join Date: Oct 2008 Location: Tampa Bay Posts: 7,866	Does APR have a tune for the 4.2? I'm too lazy to look. __________________ NRA Life Member

05-17-2012, 05:26 PM	#36
The Fed Old Guys Rule Drives: 2007 GTI DSG APR S1 Join Date: Oct 2008 Location: Tampa Bay Posts: 7,866	How much HP does it put out? Much less than twice a Stage 1 GTI, so I don't think a 4.2 pump flows much. And do both 4.2 pumps only have one fitting? __________________ NRA Life Member

05-17-2012, 04:03 PM	#29
AndoN Autocross Newbie Drives: 07 RS GTI Join Date: Sep 2008 Location: SLC, UT Posts: 85	So I found a similar topic discussed and APR confirmed that it is 136 bar. check here : http://forums.fourtitude.com/showthr...ure-gt-120-bar and also http://www.volkspage.net/technik/ssp/ssp/SSP_377.pdf ;

05-17-2012, 04:30 PM	#31
Alik4041 Habibi! Drives: 08 Wolfsburg FSI Join Date: Apr 2009 Location: -- Posts: 551	I simply have my doubts about this and honestly don't think it will come out in our favor.

05-17-2012, 04:57 PM	#33
Alik4041 Habibi! Drives: 08 Wolfsburg FSI Join Date: Apr 2009 Location: -- Posts: 551	Haha sorry if I sounded like buzzkillington! I just think that the stock 4.2L has dual pumps for a reason. I doubt that it will be able to supply that much more than our pumps. If it does, fitment will be the next issue as I'm sure you will not be able to simply swap the pumps. Internals will need to be changed. I'm wondering why our HPFP is worth 2x the cost of the 4.2L though.

05-17-2012, 05:13 PM	#35
xola3que euroturd Drives: 2008 Golf Join Date: Mar 2008 Location: Morristown, NJ Posts: 1,791	they do, Stage1 only

05-17-2012, 05:30 PM	#37
Arin@APR X runs leaner than Y Drives: B8 S4 & MK5 GTI Join Date: May 2006 Location: Opelika, AL Posts: 5,481 View Arin@APR's Garage	The 4.2L FSI V8 pump internals are identical to the 2.0T FSI. __________________ GoAPR.com \| Facebook \| YouTube \| Twitter Phone: (800) 680-7921 Local Phone: +1 (334) 502-5181 Fax: +1 (334) 502-5180 Address: APR LLC, 4800 US HWY 280 West, Opelika, AL 36801 The bitterness of poor quality is remembered long after the sweetness of low price is forgotten. Last edited by Arin@APR; 05-17-2012 at 05:40 PM.

05-17-2012, 05:38 PM	#38
Alik4041 Habibi! Drives: 08 Wolfsburg FSI Join Date: Apr 2009 Location: -- Posts: 551	/thread

05-17-2012, 09:00 PM	#39
xola3que euroturd Drives: 2008 Golf Join Date: Mar 2008 Location: Morristown, NJ Posts: 1,791	bummer... that's two birds shot for APR w/ the 4.2L HPFP @ Arin, R8's HPFP is the same as all other 4.2L?

05-18-2012, 09:44 AM	#41
AndoN Autocross Newbie Drives: 07 RS GTI Join Date: Sep 2008 Location: SLC, UT Posts: 85	It's good to have clarification now. Thanks Arin.

05-18-2012, 11:35 AM	#42
JPBlair87 Drag Race Newbie Drives: 2007 GTi Join Date: Oct 2011 Location: Charleston Posts: 48	So whats the verdict on this?? Sent from my mind via mental projection

05-18-2012, 11:39 AM	#43
xola3que euroturd Drives: 2008 Golf Join Date: Mar 2008 Location: Morristown, NJ Posts: 1,791	verdict 4.2LFSI pump is 95% same as 2.0LFSI and there's no benefit mounting the 4.2Ls on the GTI. I still have to see what the 5.2L HPFP like and see if that worths a shot.

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05-18-2012, 12:45 PM	#44
Qwoz Roflcopter pilot Drives: 08 VW GTI United Gray Join Date: Sep 2008 Location: Redmond WA Posts: 890	Well there goes my hopes and dreams of going 2+ this summer.... __________________ Plasti-Dip FTW