C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Best FPR?

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Old May 9, 2005 | 12:34 AM
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Default Best FPR?

who has the bet made FPR for a L98? also i have seen a few and none of them have gauges attached, how do you check the flow?
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Old May 9, 2005 | 12:58 AM
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Not many choices for an L98 .
The comp cams one is not that great,I had to install a nut on the adjuster to hold it in place.
realy made cheap.
I think Mid america has one,a few others .
Just throw a quarter under the top and the presure will increase.
It is almost impossiable to get to the adjustment screw.
It also does not hold the fuel presure that great.
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Old May 9, 2005 | 07:22 AM
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Holley makes a nice low profile and easily adjustable FPR.
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Old May 9, 2005 | 08:13 AM
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Originally Posted by 85vet
Holley makes a nice low profile and easily adjustable FPR.
Nice piece
Listed for TPI Camaro
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Old May 9, 2005 | 12:59 PM
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thanks guys where can i find info and order?
the holley site sucks
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Old May 9, 2005 | 01:03 PM
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http://www.jegs.com/cgi-bin/ncommerc...28&prmenbr=361

is this me?
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Old May 9, 2005 | 01:14 PM
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This is the one I got. It monts in place of the stock. If it doesnt work oh well. The one that was on there was trashed.
summitracing.com/
Part # BBK-1714

Last edited by Wheels Up; May 9, 2005 at 02:51 PM.
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Old May 9, 2005 | 02:15 PM
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You want the tpi 512-501 - just watch after installing. It will allow the pressure so low that the car will not start.
Be sure to get a baseline pressure, too.
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Old May 9, 2005 | 02:38 PM
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what do you mean baseline pressure?
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Old May 9, 2005 | 03:14 PM
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Originally Posted by CrazyInBlack
what do you mean baseline pressure?
You need to know what pressure your fuel is actually at now, before you instal the new AFPR. The car is running - current settings would be your baseline to work from.
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Old May 9, 2005 | 03:19 PM
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can you mount a gauge to the shrader (sp.) valve in these cars?
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Old May 9, 2005 | 04:01 PM
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I run a HyperTech AFPR and like it. It takes a small wrench to adjust it and has held up well for over 4yrs.

Yes, you need to attach a FP gauge to the Schraeder valve on the fuel rail (look out for spraying fuel). remove the vacuum line from the FPR, start the engine and check fuel pressure.

After you install the AFPR do the same and set the pressure to the old stock setting, as your baseline. From there you can vary fuel pressure for best power.
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Old May 10, 2005 | 12:28 AM
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I have a BBK from Summit. Had to cut back the adjusting screw as it was about 3/8" too long and won't fit under the plenum. Once the baseline of 40 lbs was set, one full turn on the adjustment screw comes out to 2.5 lbs. Total time to install, one hour.
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Old May 10, 2005 | 12:30 AM
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Holley Holley holley! Its the nicest unit out there. Slap a $25 FP gauge from autozone on the schrader valve and set your pressure.
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Old May 10, 2005 | 12:57 AM
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Originally Posted by scorp508
Holley Holley holley! Its the nicest unit out there. Slap a $25 FP gauge from autozone on the schrader valve and set your pressure.

which one of these do i need?

http://store.summitracing.com/egnsea...=KeywordSearch
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Old May 10, 2005 | 01:05 AM
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no, this one

http://www.partsamerica.com/ProductD...tnumber=CP7818

chris
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Old May 10, 2005 | 01:09 AM
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that takes me to a site that ask my zip code
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Old May 10, 2005 | 01:13 AM
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0-60 psi is all the range you'll need.
This is the one I picked up. Easy to install and read when setting the pressure. P/N ACC-74745
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Old May 10, 2005 | 01:16 AM
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Originally Posted by CrazyInBlack
which one of these do i need?
I don't ever recommend installing an underhood mechanical fuel pressure gauge. I may just be psychotic and nervous, but the idea of one failing and fuel spilling all over a set of hot headers doesn't sit well with me. I prefer an electronic gauge with just a sending unit on the fuel rail.

With that said, I just use a FP gauge on a 3' rubber line that you screw on, set the pressure, and then remove.
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Old May 10, 2005 | 01:31 AM
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here

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