i will give you guys the run down on what is happening with my car....
i tuned my car on race gas & 28psi (t3/t67/.63 hotside) 780cc injectors 255 pump other than that the fuel system is stock... (aem,272 cams all the other bolt on's)
i went to the track last weekend & felt my car slowing down on high boost so i put my wideband on my car & it has gone from solid 11.5afr's to like 13.0's ??
with this turbo do you think my fuel pump just can't handle it & it's dropping pressure???
any input would be appreciated...
i dynoed 465awhp i notice my fuel pump sounds like it's about to die when i prime it before startup... (not the usual humming noise)any info would be appreciated greatly..

i have already replaced my 255 pump once because it kicked the bucket......
thanks again
any vendors with info on fuel system problems or capabilities would be fantastic...

 

At what rpm did you notice the "slowing down".


Have you ever used unusual additives? Some alcoholic fuel additives tear up fuel system parts designed to be used with gas

Are all the vacuum lines tight?

 

do you have access to a fuel pressure gauge? if so hook it up and it will be quite simple to see the answer to your question. giver her some boost and see where the needle goes.

 

what is your durty cycle on your injectors ?

Hook upa fuel pressure gauge

Good luck

 

i have not checked it on race gas but the injectors were @ 70% on 21psi... but why would they be fine on 28psi for a month now but all of the sudden it goes lean has anyone ran two walbaro's one in tank one out of tank??? ( i know ams & buschur have there kits)
now on 20psi it's going lean also.. i will get a fuel pressure guage on it & see what happens thanks guys anyone else have any thoughts or have had issues with there 35r like this??

 

no addatives just c16/c12 & normal pump gas

 

Any changes or different parts used since you last noticed car was running normal (not going dry up top)?

 

Do you have any way of logging info on the car...what em are you running...

 

Are you sure your wideband isn't fried from the leaded gasoline? Maybe the effect of a fried main 02 (not the wideband) from all the leaded fuel leading to some sort of long term fuel trim? What engine management are you running?

 

aem, i just bought a new sensor last week & calibrated it...