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if it were me i would start with the safc because it is easier to tune, the afc also tunes timming but its intergraded in when you pull or add fuel... for example when you add fuel like +15% that would retard timing a certain degree, but i don't know how much exactly. then when you pull fuel...

did you ever get this issue resolved? i still haven't figured mine out yet...

i have a similar problem that i never figured out... wheres the fuel pump relay and do you have a wideband? when your car cuts out is your car going lean 15+ air fuel raitos? to test your map you can try unplugging it while the car is running to see if that makes a difference

do you own the white na-t mk4?

you should be able to buy it from the vendors if you have a look at what they got... but it should come with the kit

do everything all those guys mentioned and get something like a afc to tune... tunning will net you more power than just slapping on those parts without a tune

i would try replacing the master cylinder, or did you say that was new?

something like a 61mm (gt35r) or a 63mm (gt4088r) would be fine

i think mine took some thing like 2.5 to 3

i've also been told that there is a screw in chevy o2 sensor that will work, its a universal one that i think some have used... is there any info of this one?

an exhuast system shouldn't affect how high you can rev... it maybe your tach or ecu cuz i remember mine sometimes reving to 73 and sometimes only 68, more than likely its your tach

no problem

i had the same problem at one point, i replace the cable that went from the short part off the tranny to the guage cluster... what you can also do is spray lubicant like wd-40 or something similar in the end that connects to the short part of the tranny and just hook up a power drill to the same...

which tranny will you be using?

wow nice ---------- Post added at 11:50 PM ---------- Previous post was at 11:49 PM ---------- how much boost was that on?

i would agree with every one... you should be some where in the 400s, why did you go 4" back to 3"? i would fix that and go back to 4" cuz i'm sure its gonna hurt your power

damn sounds like we both have the same problem... i never figured mine out either... does your run really rough and idle really low? mine runs super rich, in the 9 afr at idel then runs super lean 16+ above 3k rpms i'm thinking about replacing my 550s for the hell of it cuz that was the last...

^^+1 those were the ones i was running also before i switched to colder plugs... if you do a research there will be others that you can run

are you on stock injectors? with my fuel pressure cranked way up and a tune with a safc2 i was able to run 18 psi without a problem for dyno numbers

nice! if only you guys had e85 in canada, it would be a beast!