S13costa
04-08-2013, 06:13 PM
so i finally decided id turn to the forums after searching and searching and going through many local people im stumped as to whats going on.
il try to give all the info so we can get right down to it.
i swapped a redtop sr into my s13 coupe about a month ago the swap went great no issues, i got the motor from a buddy, it had been sitting for about 2 years, it is a bone stock sr20det redtop, as word of mouth goes he told me it ran perfect up to the day he pulled it,
Setup: bone stock sr20det redtop early model
running open downpipe
stock ka fuel pump(i know not a good idea but not the issue)
frontmount intercooler
greddy bov
running stock boost directly from wastegate
now onto the issue, the car starts up perfect, idles pretty perfect
it cruies around perfectly but heres where it gets weird if i go wot in any gear any rpm, it almost feels like its running n/a, it doesnt sputter or backfire or anything like thay, i dont beleive it smokes though its hard to tell cause open dp, it feels n/a up to about 4 to 4500 rpm, then it actually starts pulling decently, the thing is, my boost gauge will show me 7 pounds by at least 3 grand alothough im not feeling anything untill much higher rpm, iv checked mechanical timing it is correct, iv set ignition timing multiple times its correct.
i have no boost leaks, my vaccume lines are correct, my turbo has no shaft play, i dont beleive i have any exhaust leaks from mani to turbo or mani to block although i am missing to studs on exhaust mani but on two different runners. i cant hear a leak though. iv restabbed the cas a few times now and even put a known working one in, maf is good, tps is good, coilpacks seem to be good, i dont beleive it can be a fuel issure due to the fact that it gains power the higher the rpm, im completly stumped i keep going back to thinking its a timing issue but all that is correct, i even tried my buddies ecu and zero change. i am completly stumped if anyone can shed some light or has had a simialr issue pleas please helpp! im doing a compression test later toinght as a last resort, i also
il try to give all the info so we can get right down to it.
i swapped a redtop sr into my s13 coupe about a month ago the swap went great no issues, i got the motor from a buddy, it had been sitting for about 2 years, it is a bone stock sr20det redtop, as word of mouth goes he told me it ran perfect up to the day he pulled it,
Setup: bone stock sr20det redtop early model
running open downpipe
stock ka fuel pump(i know not a good idea but not the issue)
frontmount intercooler
greddy bov
running stock boost directly from wastegate
now onto the issue, the car starts up perfect, idles pretty perfect
it cruies around perfectly but heres where it gets weird if i go wot in any gear any rpm, it almost feels like its running n/a, it doesnt sputter or backfire or anything like thay, i dont beleive it smokes though its hard to tell cause open dp, it feels n/a up to about 4 to 4500 rpm, then it actually starts pulling decently, the thing is, my boost gauge will show me 7 pounds by at least 3 grand alothough im not feeling anything untill much higher rpm, iv checked mechanical timing it is correct, iv set ignition timing multiple times its correct.
i have no boost leaks, my vaccume lines are correct, my turbo has no shaft play, i dont beleive i have any exhaust leaks from mani to turbo or mani to block although i am missing to studs on exhaust mani but on two different runners. i cant hear a leak though. iv restabbed the cas a few times now and even put a known working one in, maf is good, tps is good, coilpacks seem to be good, i dont beleive it can be a fuel issure due to the fact that it gains power the higher the rpm, im completly stumped i keep going back to thinking its a timing issue but all that is correct, i even tried my buddies ecu and zero change. i am completly stumped if anyone can shed some light or has had a simialr issue pleas please helpp! im doing a compression test later toinght as a last resort, i also