help!!! turbo is killing me!, 7afe turbo issues Options

[darkhorse]

ok well.... first off i'm newish here. was on a while back but lost info and kinda stepped away from it all for a while. any-who, finishing up my 7afe turbo build and having minor issues. aka lack of performance.

mind you all its a budget/junkyard build.

96 7afe

list of whats done...

t3/t4
manifold
external waste gate
obx fmu
bov
gm 3bar map
vac and oil lines


just to give a little background i have had my own shop for a while with my sis (who was a frequent on here for a while(had a 7afe show car bagged and all kind of crap done to it candy red paint with airbrushed flames)) and old man. done plenty of turbo systems before and plenty of street tunes but this one is really pushing my buttons. (prob cuz its a build for myself) but a simple build has been a nightmare so far.
long story short......


1 water pump killed motor

2 junkyard motor swapped turbo kit added

3 head gasket bad rods bad turbo shot (should have looked better at it)

4 no car for work week 1

5 no work on car raining! week two

6 2nd junkyard motor 2nd turbo re-fab manifold/header for turbo. works ish...

7 fmu is not rising rate so tuning does not do s....! and horrific breaking up at boost.

8 breaking up solved with plug gap (don't trust pre gap plugs) still no power more than factory

9 fmu swapped out with correct one better vac to 0 range (not flooding) stumbles at 0 to 2 psi and 2 to 7 has factory performance.

10 stumped!!! i have read that factory fuel pump and injectors are ok to the 5 to 7 range. pressure and vac tested piping. waste gate fully functional. bov fully functional. piping removed car runs perfect. turbo spooling perfect (from sound and response) cant adjust timing (spent three hours swapping dizzy guts into a different dizzy housing with the adjustable bolt hole.... didn't do a d.... thing) i have researched posts here from oobe and hurley (prob misspelled) and i didn't notice my issue anywhere anyone have any ideas??? before my wife shoots me???




help!!!!!

[huntsmcgee2]

I know this is a somewhat dated thread but I have put about 1500 miles on my new 7afe build. I am using a t25 with safc and wide band. Also I'm running 265cc Miata injectors it's plug and play I turned the dizzy back to 5 degree instead of 10. I have a switch I made to reset the ecu in cabin and that helps keep my safc tune from getting kicked out. The car runs near stock when off boost and has plenty of power. I also had bad misfire until plug gap at .22 but I'm also running at 12-13 psi so might have something to do with it. Anyway if I where you I'd go safc wideband and Miata injectors or safc wideband 320cc supra injectors and 3sgte 2 bar map and if your staying fmu perhaps the begi unit since you can leave fuel alone for the onset of boost. Btw 320cc will run nasty rich on warm up even with safc tuning if running stock map and 320 is not needed unless you plan on 200-220whp. The stock will get you to about 160, the Miata stock 180es.