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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.
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.
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.
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.
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.
From: Freedom is never more than one generation away from extinction.
St. Jude '03 thru '24
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.
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.