something is going on...

 

Ding Ding Ding...we have a winner. Good call

I went to the track last night and watched the fuel pressure and at around 5000 rpm my fuel pressure was @ 20 psi . What do you guys think....run another intank pump on a switch or should I hook up that booster pump that comes with the procharger?

 

too bad you didn't catch that on the dyno..

What do you have as far as a pump now?

 

Racetronix PNP

 

I'd start checking the fuel lines for bends and cracks and even take a look at the fuel filter.

 

Isn't the racetronix kit a HI PSI kit and not a high volume pump? I thought forced induction needed high volume so coupled with an inline tank.

 

I was thinking about buying the racetronix plug and play kit for a blown 383 set up also...... however if you don't have enough pressure I just may have to buy the dual intake pump.

-B

 

Yeah one racetronix isnt enough for only 8 psi

 

My racetronix pump keeps pressure up fine even at 8 psi. That was 475 rwhp...and holdinh just fine.

 

Dont know man, maybe it has something to due with the larger displacement. I only know what the guage tells me. My 50#ers are already screaming at 125% DC

 

System should be good for apx. 550RWHP FI at 43.5PSI base.
Running the FP too high will greatly impact the fuel volume.
If you need higher pressure due to undersized injectors you may add an in-line pump to maintain volume at higher pressures.

Please read the last post here from Blowerworks:
http://forums.corvetteforum.com/show...ix&forum_id=48

 

I thought that I had read that an in-line pump on a racetronix kit or any other 255 pump would be like putting a firehose through a straw. I have emailed you about the dual pump setup BTW

 

Adding a T-Rex in-line pump in series with a Walbro 255L/Hr in-tank pump is not a great idea as the T-Rex does not flow the same. If you are going to add an in-line booster you should run the Walbro GSL392 255L/Hr HP pump.

We are not making DP's at this time. We are setting up some dealers to make them in-house with our harnesses, pumps, plumbing etc.

 

Did you run any DataMaster logs on your passes? I fought fuel pressure problems for a long time and finally figured out my alternator was crappy out at high rpm. Check the Voltage on your logs this may be your issue to.

Jeff
96 SS BLOWN
96 TA 396 D1

 

Do you run at 75/80?