Turbo Help asap

[RedZMonte]

This is what my gauge does. If you scoll down the page
http://www.afn.org/~wjh/tsc/supra/afguage/airfuel.htm

thats normal. is it tappd into your stock O2 sensor or is it a Wideband O2 (Aem, ect)... with its own sensor? I wouldnt rely on a narrow band that taps the stock O2 sensor. they are not really very accurate.. Altho mine does give me a ballpark reading of what is actually there. but again i would not tune off of it. For the most part you can pretty much ignore any narrow band O2 guage. when i was WOT i allways read Rich, Boosted or not. running lean at low RPMs is nothing to worry about. unless its running rough, you may get a "Missfire" but at 1000 to ~3000 rpm's your not really building boost and i have never heard of anyone poping an engine at low speed rpms its allways 3000+ rpm's. At 1200 rpms your car is not adding allot of fuel, its pretty much idleing, basicly no load on the engine and if you had more fuel you would get gas fumes.

use good clamps i have "Werm drive" clamps on mine. they should hold up to about 10-15psi, don't need T-bolts. also if you weld on a "lip" on the edge of the pipes be carefull to smooth them out or you can rip you couplers.

I ran a 12:1 FMU on stock injectors and 5psi for over a year. i wouldnt do a FMU with any more boost but again if you hear any funny noises "detination" anything then let off. I would do a couple partial throttle runs and make sure everything feels good before WOT.

S

[RedZMonte]

Your BOV (top valve) should be hooked to your intake plenum, the wastegate (bottom valve) should be hooked to the turbo, keep both lines as shot as possible (espacially the WG).

OK.... Thats sounds kinda confusting....

The BOV should be on your charge pipes before your MAF. If it is added after your MAF you HAVE to resurculate the pressure back your your turbo intake or you will load up on fuel and stall (or shoot flames... Right Tim?). the wategate is obviously before the turbo.

Do you have a boost guage? make sure your FMU and your wastegate have a GOOD vaccume source. my Wastegate and FMU has the vaccume straight off the compressor housing of the turbo like so.

[d.o.h.c]

Ok I did this for vacuum, dont know if it would work. I drilled a port on the plenum and ran that hose to a manifold. The manifold holds 4 other ports. Then from there I ran the wastegate, bov, and fmu. I will shoot a pic up today of it. I dont know if it is working thought. I do have the bov before the maf sensor.I do have all t-bolt clamps, the reason it poped off is because it was not tight. I will shoot up a pic of the manifold I made and you guyes can tell me if it is ok or not. If not I will fix it. As far as a/f gauge. It is a autometer short sweep gauge. It does go up and down when I push on the gas so I am deffinitly getting fuel. Thanks for all your help and I will shoot those pics up in about 3 hr when I get out of here. Please respond tonight.

[RedZMonte]

i would not run to many items off one vac source. if you run the FMU and the BOV on the one and run the Wastegate straight from the turbo i would be a little more confident. you loose vac. strenth when you tap to many items into one vac. source.

I ran the WG and the FMU straight off the turbo because i know it will get a good strong source of boost when the turbo is spoold. The WG and FMU are 2 of your most important components of your system, fuel control and boost control, wanna make sure you get them a nice strong boost source.

S

[d.o.h.c]

True, I will change that shit. but my turbo does not have a port on the turbo side. So i guess i have to drill and tap one. Thanks

[ForcedFirebird]

OK.... Thats sounds kinda confusting....

The BOV should be on your charge pipes before your MAF. If it is added after your MAF you HAVE to resurculate the pressure back your your turbo intake or you will load up on fuel and stall (or shoot flames... Right Tim?). the wategate is obviously before the turbo.

He had the BOV connected to boost, I don't know what is confusing about that. The BOV I have has two ports on it, one above the diaphram and the other below. With no boost controller, the top of the BOV diaphram needs to see vacuum when the TB plate is closed. If apply boost to the BOV, then it will be forced shut.

[RedZMonte]

He had the BOV connected to boost, I don't know what is confusing about that. The BOV I have has two ports on it, one above the diaphram and the other below. With no boost controller, the top of the BOV diaphram needs to see vacuum when the TB plate is closed. If apply boost to the BOV, then it will be forced shut.

most BOV's only have 1 vac port and it should be ran to a vac source on the plenum. the WG has 2 ports. you said in your other post that the bov should be hooked to your intake plenum, i misunderstood what you ment.... reading it again i know you mean the Vac lines. My bad.

[RedZMonte]

True, I will change that shit. but my turbo does not have a port on the turbo side. So i guess i have to drill and tap one. Thanks

Or you can drill and tap your charge pipe right after the turbo. that would be easier. just make sure to use some thread sealer and a nice thick vac hose. make sure your fitting has some good barbs and is a tight fit. you don't want that vac line poping off or you will lose the FMU and WG.

S

[ForcedFirebird]

Or you can drill and tap your charge pipe right after the turbo. that would be easier. just make sure to use some thread sealer and a nice thick vac hose. make sure your fitting has some good barbs and is a tight fit. you don't want that vac line poping off or you will lose the FMU and WG.

S

Excellent advice. If the WG line comes off, you will have no wat to bleed boost . 5/16" hose is the minimum I would recommend. Also the shorter, the better, you don't want much delay in the opening of the WG.

[d.o.h.c]

I took the charge pipe off and drilled 3 holes. bov,wg and fmu. Now I used a grommet and a plastic fitting. It is pretty loose thought. Now when I was driving it I noticed that the car drives it self at 1500 rpm. Basically I dont have to touch the gas. Also I get no A/F reading when this happens. How touchy are those lines. I will post a pic. give me a sec

[d.o.h.c]

here you go.

[d.o.h.c]

I am wondering if it wouldnt be the transmission modular check valve that would keep the rpm up? I might have put it on backwards?

[d.o.h.c]

ON the tranny check valve. What part goes towards the tranny. THe big side or small side

[RedZMonte]

i would get brass fittings for the holes. under pressure i dunno if the rubber gromments would hold it. like i said before you don't want them to blow out. or have metal nipples welded on.

S

[ForcedFirebird]

You are still referancing boost for your BOV? You need to hook your BOV to the plenum.

If those fittings are loose, and you have a MAF ECM, then you have a vac leak.

Wait, it looks like a you do have a MAF, and it's after the turbo, it needs to be before the turbo. The MAF shouldn't see boost.