im having a problem my car pulls great up till about 5 grand the turbo is spooling great8psi (thought that i was getting a 15lb wastegate from hahn) till then . after that the thing dosent pull anymore . egt climbs up to about 1400 .sfmu has the big disk in it i think dark spring idle fp is at like 19 and no boost port screw . i don't know what compression pistons i have but i know they are je's and eagle rods i did a compression test i got 190 190 195 190 what could be the problem




my set up is
accell 415s, crane 16s , oversized indy valves , built bottum end , hrc s16g,
starion ic, rfl bov, sfmu , missing link, 255lph fuel pump, was atx

its on a stock clutch that can't be it. could it be to rich . any ideas

punctuation and proper grammer is always good for starters! beyond that, if you got the 7-9 psi actuater with the adjustable end on the wastegate arm, you good be only geting 5psi from that. try adjusting that.

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Could you explain what happens to the boost after 5k - does it go down? To what - 0psi? Or does it stay at 8psi?


95 Eclipse RS : 5 speed
15.7 @ 87.9mph
Jeep TB writeup - http://www.dimensia.com:81/jimbo/JeepTBfor2gnt.html

stays at 8 psi. it seems to lack power after 5k . i did lean it out a little and it got better . but it still isn't great. im waiting to turn the boost up . or could that be the problem too much fuel (415cc) on 8 psi . i had a problem with a boost controller so i have to wait for it to be returned

I'd wait until you get your boost controller to really diagnose the problem. You don't have a small vac. leak somewhere do you? Check all your vac lines. That will kill boost fast.

What kinda of FP are you running at idle?

1999 Eclipse GST 4G63

19psi fp at idle . i am not pulling any timing with the dis2 . ill check for a vac leak . i don't have the filter in the missing link if that would do anything

The big disk? the 2.75" or something one?

I'd say you're way too rich. But then, i've never used an SFMU..

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'95 Eclipse TurboGS (garage deco)
'95 TSi AWD (restoring a survivor)
'97 Talon ESi-T (poor impulse control)
'99 Eclipse RS-T (daily beater)
'13 Evo X (mostly stock)
'17 Sienna (Middle Aged Dad Mobile)



Factory Service Manuals: http://nawdu.de/files/

I'd put the filter back in. The ML mounts direclty to your intake manifold, which is were your vac lines are tied in to. Any opening is going to cause a leak.

1999 Eclipse GST 4G63