0-6psi < 48hrs

[MidnightriderZ24]

u will need to run a tgp code. that thing looks badass man! what size turbo is that? take it easy on that trans.. or go 5 speed. yeaaa

[IsaacHayes]

The 2.5" pipe that goes right to the MAF likely is causing problems. Since the air doesn't have time to smooth out to the diameter of the MAF. It's just ramming right into the center of it. That's my guess.

Also, if you could move the BOV back further (I know that's not optimal, closest to TB is best) to right after where the pipe comes out of the fender, then go to 3" and then put the MAF after that a bit so that the MAF is by the compressor housing instead of by the exhaust housing. Of course that might not help put the MAF far enough away from the 2.5" charge pipe to smooth out the air again.... I'd keep the screen in the MAF if you have took it out.

Perhaps putting the MAF right by the TB would work too, but not sure if that's good for smooth flow through it either being so close....

Midnightriderz24: He is OBDII... Can't exactly use TGP code. Or even go to OBDI because his trans is a 4T60-E electronic controlled...

Loner, I'm not sure but I heard of a 2 bar "patch" for either HPT or DHP. Not sure which. I know rickeykline is using 2bar IIRC. Might want to get in touch with him, his setup is like yours. (turbo, 3400/3500). Otherwise perhaps adjusting the MAF flow tables would be the route to go. Not sure if you will max out the MAF, might have to go to LS1 MAF then.

Do you have a wideband? Keep it on the rich side always when in boost to be safe especially until it's dialed in.

[ForcedFirebird]

The 2.5" pipe that goes right to the MAF likely is causing problems. Since the air doesn't have time to smooth out to the diameter of the MAF. It's just ramming right into the center of it. That's my guess.

Also, if you could move the BOV back further (I know that's not optimal, closest to TB is best) to right after where the pipe comes out of the fender, then go to 3" and then put the MAF after that a bit so that the MAF is by the compressor housing instead of by the exhaust housing. Of course that might not help put the MAF far enough away from the 2.5" charge pipe to smooth out the air again.... I'd keep the screen in the MAF if you have took it out.

Perhaps putting the MAF right by the TB would work too, but not sure if that's good for smooth flow through it either being so close....

Midnightriderz24: He is OBDII... Can't exactly use TGP code. Or even go to OBDI because his trans is a 4T60-E electronic controlled...

Loner, I'm not sure but I heard of a 2 bar "patch" for either HPT or DHP. Not sure which. I know rickeykline is using 2bar IIRC. Might want to get in touch with him, his setup is like yours. (turbo, 3400/3500). Otherwise perhaps adjusting the MAF flow tables would be the route to go. Not sure if you will max out the MAF, might have to go to LS1 MAF then.

Do you have a wideband? Keep it on the rich side always when in boost to be safe especially until it's dialed in.

MAF screen is in. Many people have mentioned heat screwing with the MAF on various boards we have posted the build on.

Wideband is on and if you watch the video, you can hear Bo mentioning how rich it is.

[IsaacHayes]

I saw a gauge, wasn't sure if it was wideband or what in the video.

[sprucegagt]

Does anyone know what i have to do if anything to install a 2 bar MAP? i have one to put in but i dunno what needs to be changed in the ECM to make it see it

So far only GTP or GS code will work with a 2 bar MAP. DHP tried to make the conversion work but when people tried it, they found out the PCM was resetting the barometric reading to the max boost pressure reading.

http://www.grandamgt.com/forum/showt...MAP+conversion

[loner666]

turbo is a 60 trim Garret with a .63A/R stage 3 exhaust

the piping is going to get more work done to it in time..we took the windshield washer tank out to work so i think im going to relocate it so the piping can be brought up some more for the intercooler to fit better and allow for a larger pipe on the cold side

and i might swap in a 5 speed as i might have lost the auto already..its got 140k miles on it anyway

[ForcedFirebird]

I saw a gauge, wasn't sure if it was wideband or what in the video.

Wideband and boost on the pillar.

[IsaacHayes]

Hopefully the crossover clears the 5speed mount and bellhousing...

[ForcedFirebird]

Hopefully the crossover clears the 5speed mount and bellhousing...

Looks like I'll be hlping with that install as well We can cut/weld whatever we need to do.

BTW Loner, just remembered I saw a 5 speed swap kit at domesticcrew...

http://domestic.3400z24.com/660board...pic.php?t=1468

Maybe you can get the tranny local and get the rest of the stuff for the swap

[IsaacHayes]

From what was said on bstuff the 92+ mount is smaller and gives you more room.

[loner666]

ive got a lead on most of the stuff i would need..just have to get a trans and body mount i think is all i would need to get it going

[merlot566jka]

there is a circut diagram in one of my fiero books that shows how to 'fool' the ecm with a 2 bar map. its really simple to make, results are published in a $9 book, fast fieros or something

[1988GTU]

there is a circut diagram in one of my fiero books that shows how to 'fool' the ecm with a 2 bar map. its really simple to make, results are published in a $9 book, fast fieros or something

That trick is the diode trick IIRC and it's really not the best option. Basically when psi is reached it just dumps fuel in and has no clue whats going on.

[merlot566jka]

nope, your thinking something else....

this changes the values of the map output. it makes it so that at 2bar the signal is 5v to the ecm, but everywhere before lines up the way it should. ill see if i can find it online somewhere

[merlot566jka]

i drew it in paint...sorry for the quality

in order to allow the 2bar map to operate at slightly higher boost, the circut below was added between the output of the map and the ecm. this allows the 2bar map to operate normally between 0 and 1 bar, and then operate on a different slope between 1 and 2 bar, so that it will actually sense accurately up to about 18psi of boost. it also keeps the output voltage from exceeding the limit that causes the fiero ecm to momentarily shut off the engine and gie an error code. this change is slope of the 2 bar map sensor must be coordinated with the VE for values above 1 bar. this change allowed the fiero to idle well because it responds like it did previously with manifold vacuum (absolute < 1 BAR)