Fuel Pressure drops under boost - Page 3

AaronGTR · 11-02-2008, 01:09 PM

That setup looks pretty nice. Which FPR is that? I was thinking if I do this in the future I might switch to the LT1 unit.

cncguy · 11-02-2008, 08:36 PM

Not that it was really needed for my application but I did a returnless fuel system as shown below. Opens up options for regulators and fuel flow should be close to double since both fuel rails are being fed.

PhantomLover007 · 11-02-2008, 08:48 PM

DROOLZ!!!

Nice.

AleroB888 · 11-02-2008, 11:26 PM

Quote:

Originally Posted by cncguy

Not that it was really needed for my application but I did a returnless fuel system as shown below. Opens up options for regulators and fuel flow should be close to double since both fuel rails are being fed.

I'm hoping I can still use that option with the Aeromotive regulator I have now, it can be remote mounted also....

Are there any known downsides to that type of system?

AleroB888 · 11-03-2008, 12:15 AM

Quote:

Originally Posted by AaronGTR

That setup looks pretty nice. Which FPR is that? I was thinking if I do this in the future I might switch to the LT1 unit.

Aeromotive #13107, (won't fit with stock intake manifold) they also make a universal version for remote mount.

cncguy · 11-03-2008, 05:10 AM

Quote:

Originally Posted by AleroB888

I'm hoping I can still use that option with the Aeromotive regulator I have now, it can be remote mounted also....

Are there any known downsides to that type of system?

That regulator will work fine as it appears the fittings can be changed.

I have found no downsides other than the initial plumbing costs. Some of the benefits include increased plumbing, routing, mounting and regulator options. In addition to greatly improved fuel flow, this setup also returns the excess fuel to the tank before it has a chance to be heated by the fuel rails. Drag racers could also opt to install a fuel cooling unit between the regulator and fuel rails for a cooler charge.

AleroB888 · 11-20-2008, 02:12 AM

Quote:

Originally Posted by AleroB888

..........
The reason I'm doing this is if I let the engine go into a hot soak, I can duplicate the fuel pressure drop under boost at WOT symptom that Schweppe's car has, but mine has the additional trouble of dropping to zero if I let it sit and idle long enough. So I think it's caused by the pump failing in my case, but not his. But I want to see if this pump can be made to work good enough to debug the system before I install the Racetronix............

Got the dual feed (correct terms?) set up for testing, the pump did not shut off after extended idling, at least not this time. Just made a quick run down the road.....I am still sure the pump is not 100%, the car did not seem to have the power it should, but it was too dark to see the gauge well enough, and I didn't scan it yet at WOT.

The FPR is not usually configured like this. I'll also have to take pressure readings at the fuel rail test point, and compare that to what I get at the FPR.

Nick-G · 03-10-2009, 10:11 PM

The performance section is pretty dead so I figured I would resurrect an old thread.

Quote:

Originally Posted by AleroB888

Got the dual feed (correct terms?) set up for testing, the pump did not shut off after extended idling, at least not this time. Just made a quick run down the road.....I am still sure the pump is not 100%, the car did not seem to have the power it should, but it was too dark to see the gauge well enough, and I didn't scan it yet at WOT.

The FPR is not usually configured like this. I'll also have to take pressure readings at the fuel rail test point, and compare that to what I get at the FPR.

I'm just curious did you keep your fuel system returnless like you have shown in the picture?

Did you have any problems with the fuel system being setup like that?

I had been planning on trying a similar setup and I was just curious how well that worked out for you.

AleroB888 · 03-11-2009, 12:14 AM

Quote:

Originally Posted by Nick-G

The performance section is pretty dead so I figured I would resurrect an old thread.

I'm just curious did you keep your fuel system returnless like you have shown in the picture?

Did you have any problems with the fuel system being setup like that?

I had been planning on trying a similar setup and I was just curious how well that worked out for you.

I still have it basically set up as in the picture, except with a more simplified routing of the fuel lines.

No problems from a performance standpoint so far. With the new regulator and Racetronix/Walbro installed, pressure has been rock solid under boost, seems to have more power, but I won't know for sure till the track opens next month.

There is a chance it could affect emissions -- after a bit of a hot soak, the fuel rail stayed cooler than the surrounding IM metal (

) -- but it can easily be put back to stock if need be.

I wish I had tried this before changing from the stock fuel pump. My biggest concern is still these damn Walbro type pumps. It is working good now, but when we had some record-breaking warm days here lately, the pump's "sound" got louder. I am still working on an in-line as a back-up system.

99Alero_Boy · 03-15-2009, 09:18 AM

hey greg, if you want to go back to a stock pump, i'll trade you straight across for your racetronix...

Schweppe23 · 03-15-2009, 04:05 PM

anyone tried a bap?

Nick-G · 03-15-2009, 04:15 PM

Quote:

Originally Posted by Schweppe23

anyone tried a bap?

Not that I know of.

AleroB888 · 03-15-2009, 07:22 PM

Quote:

Originally Posted by 99Alero_Boy

hey greg, if you want to go back to a stock pump, i'll trade you straight across for your racetronix...

Haha, the 2001 canister won't fit the '99. The problem is none of the OEM replacements they have available now are as well made as the one that originally came with the car in '99.

AleroB888 · 04-09-2009, 09:27 PM

Quote:

Originally Posted by AleroB888

............ My biggest concern is still these damn Walbro type pumps. It is working good now, but when we had some record-breaking warm days here lately, the pump's "sound" got louder. .

Nothing to worry about.......Nothing at all!

99Alero_Boy · 04-09-2009, 09:51 PM

looks good greg!! glad you got that cut out nicely!!!

AaronGTR · 04-10-2009, 05:39 AM

haha that's cool. Made a cut out for quick fuel pump access huh? That's a pretty good idea.

cmtapanes · 04-10-2009, 09:23 AM

came out nice. easy access to the pump.

SpyhunteR · 04-10-2009, 09:32 PM

a brilliant idea. on hondas, mitsus, et al ........ they kinda have this easy way of accessing their pumps a similar way too

11-02-2008, 01:09 PM	#41
AaronGTR BlingWithBallz AKA: Aaron Join Date: Aug 2002 Location: Detroit area, MI Age: 43 Posts: 12,254 Vehicle: 2000 Grand Am GT1 2dr	That setup looks pretty nice. Which FPR is that? I was thinking if I do this in the future I might switch to the LT1 unit. __________________ The few, the proud, the boosted! 13.788 @ 103.73 mph (3/2011) 320 whp and 300 ft/lbs torque. (3/2011) See it here. the total package.

11-02-2008, 08:36 PM	#42
cncguy GAGT - Newbie AKA: Marc Join Date: Nov 2007 Location: Dayton, OH Posts: 28 Vehicle: 2004 -ONE	Not that it was really needed for my application but I did a returnless fuel system as shown below. Opens up options for regulators and fuel flow should be close to double since both fuel rails are being fed. __________________ Marc http://www.tcemotorsports.com http://www.killerbv6.com

03-15-2009, 09:18 AM	#50
99Alero_Boy Oldz Sleeper AKA: Kyle Join Date: Apr 2003 Location: Belle Fourche, SD Age: 37 Posts: 817 Vehicle: 2001 Olds Alero GL3	hey greg, if you want to go back to a stock pump, i'll trade you straight across for your racetronix... __________________ Aleromod.com co-owner

03-15-2009, 04:05 PM	#51
Schweppe23 GAGT - Senior Member Join Date: Sep 2002 Location: Ohio Age: 41 Posts: 1,549 Vehicle: Pontiac	anyone tried a bap? __________________ First 99+ GAGT to run 14s First E/M (only) GA to run 13s First turbo'D GAGT to run 12s 11's coming soon

04-09-2009, 09:51 PM	#55
99Alero_Boy Oldz Sleeper AKA: Kyle Join Date: Apr 2003 Location: Belle Fourche, SD Age: 37 Posts: 817 Vehicle: 2001 Olds Alero GL3	looks good greg!! glad you got that cut out nicely!!! __________________ Aleromod.com co-owner

04-10-2009, 05:39 AM	#56
AaronGTR BlingWithBallz AKA: Aaron Join Date: Aug 2002 Location: Detroit area, MI Age: 43 Posts: 12,254 Vehicle: 2000 Grand Am GT1 2dr	haha that's cool. Made a cut out for quick fuel pump access huh? That's a pretty good idea. __________________ The few, the proud, the boosted! 13.788 @ 103.73 mph (3/2011) 320 whp and 300 ft/lbs torque. (3/2011) See it here. the total package.

04-10-2009, 09:23 AM	#57
cmtapanes GAGT - Member AKA: Carlos Join Date: Jan 2006 Location: Ruskin, Florida Age: 45 Posts: 608 Vehicle: 1999 Grand Am Coupe	came out nice. easy access to the pump.

04-10-2009, 09:32 PM	#58
SpyhunteR #1 hater AKA: Rob Join Date: Aug 2002 Location: Las Vegas Age: 38 Posts: 4,968 Vehicle: 01' 2.4T GA / 08 TBSS	a brilliant idea. on hondas, mitsus, et al ........ they kinda have this easy way of accessing their pumps a similar way too __________________ Hey kids going to Vegas? Let me help you help me help you! Shoot me an email or PM for all your Vegas Night Club bottle hallucinations & strip club desires! FACEBOOKFACE! "Understeer is when you hit the wall with the front of the car and oversteer is when you hit the wall with the rear of the car. Horsepower is how fast you hit the wall, torque is how far you take the wall with you."

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