12aT header glow prob
#1
12a turbo by FBII
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12aT header glow prob
This just started happening one day and has not gone away. Under any load condition my header will glow. At first I thought it was the ignition because I had a bad magnetic pickup in the distributor, replaced the distibutor an redid all my electircal connections. Ive tried everything that I can think of that would relate to this problem. My air/fuels are around 11.5/12 when cruising. Me and FBII are out of ideas, any suggestions.
My setup:
Renes tubular manifold
S4 TII turbo
MSD fuel injection pump
Aeromotive 1:1 RRFPR
FBII's boost prepped Nikki
MSD 6a w/ Accel Super Coil
Accel 8mm wires
My setup:
Renes tubular manifold
S4 TII turbo
MSD fuel injection pump
Aeromotive 1:1 RRFPR
FBII's boost prepped Nikki
MSD 6a w/ Accel Super Coil
Accel 8mm wires
#6
blown up motors
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Originally Posted by sand121
I think thats too rich. You might be burning the excess gas in the exhaust.
^^^ again i was still thinking backwards sorry sand121 thanks for pointing out my mistake
Last edited by 81gsl12a; 01-08-06 at 04:09 PM.
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#8
blown up motors
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The graph below illustrates a few key points. First, the concept of stoichiometric mixture...that is the point where, chemically, there are exactly enough atoms of oxygen to burn 100% of the fuel. This point is at an air-fuel ratio of 14.7:1. If you have more air with same amount of fuel you have a lean mixture, less air than stoichiometric is a rich mixture. As you can see from the graph, maximum power is produced with a slightly rich mixture (12.6:1) and maximum economy with a slightly lean mixture.
#10
Hunting Skylines
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Originally Posted by 84gsNC
This just started happening one day and has not gone away. Under any load condition my header will glow. At first I thought it was the ignition because I had a bad magnetic pickup in the distributor, replaced the distibutor an redid all my electircal connections. Ive tried everything that I can think of that would relate to this problem. My air/fuels are around 11.5/12 when cruising. Me and FBII are out of ideas, any suggestions.
My setup:
Renes tubular manifold
S4 TII turbo
MSD fuel injection pump
Aeromotive 1:1 RRFPR
FBII's boost prepped Nikki
MSD 6a w/ Accel Super Coil
Accel 8mm wires
My setup:
Renes tubular manifold
S4 TII turbo
MSD fuel injection pump
Aeromotive 1:1 RRFPR
FBII's boost prepped Nikki
MSD 6a w/ Accel Super Coil
Accel 8mm wires
#13
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he basically has the same turbo setup as me. 10 degrees advance. nothing has changed, just all of a sudden his header started glowing all the time. those afr's are fine.. it's a turbo setup
mine does not glow and i'm not sure where to look anymore. ignition is on par, msd is rockin out, new distributor, cap, etc... fuel is there, timing same as mine, we're lost.
it never did this before till recently. we're going to change plugs and try a different gap next. so we'll see.
mine does not glow and i'm not sure where to look anymore. ignition is on par, msd is rockin out, new distributor, cap, etc... fuel is there, timing same as mine, we're lost.
it never did this before till recently. we're going to change plugs and try a different gap next. so we'll see.
#14
12a turbo by FBII
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Yea, ignition is set to 10 degrees advanced, which is where its been this entire time. I am running a modified TII downpipe that couples to the RB mid section, but no muffler section, so its a strait through with no restrictions. Im lost as far as what it could be, the only thing thats changed is when I changed the plugs last we gapped at .020 instead of .014, but that shouldnt matter, but im going to try it cause I have nothing left to check.
#15
FB+FC=F-ME
Check everything out,timing,mixture and such....but if it still glows,I wouldnt worry too much.
My TII hybrid had always glowed.Stock primary injectors,stock timing,stock ECU,passes smog,ect,ect,ect.It is streetported,which could introduce a little more fuel to the exhaust stream.
For the last 4 years it has glowed a dull red around the turbine housing and the front of the cat glows a tad brighter.......Hell,even the inner pipes of my RB muffler are a very dull red when you look at them in the pitch dark, and thats all the way back at the rear of the car!
My TII hybrid had always glowed.Stock primary injectors,stock timing,stock ECU,passes smog,ect,ect,ect.It is streetported,which could introduce a little more fuel to the exhaust stream.
For the last 4 years it has glowed a dull red around the turbine housing and the front of the cat glows a tad brighter.......Hell,even the inner pipes of my RB muffler are a very dull red when you look at them in the pitch dark, and thats all the way back at the rear of the car!
#17
12a turbo by FBII
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I know rotary exhaust is hot, but this is not normal. It has never done this. Me and FBII go out every weekend and give these cars hell and the headers never have heated up like this. Even when I had them wrapped they would never glow. I guess the things Im most worried about is the tubular header cracking and that much heat is making the turbo glow bright *** red. I dont want to damage the header or the turbo. Ill keep looking
#18
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why dont you try richening up the mix and playing with the timing to get it to stop glowing.
U tried cleaning out the fuel system/changed filters etc etc
My car glows cherry red after giving it some hell. Just put a heat shield over the snail and make sure you cool it down before switching off
-James
U tried cleaning out the fuel system/changed filters etc etc
My car glows cherry red after giving it some hell. Just put a heat shield over the snail and make sure you cool it down before switching off
-James
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the wideband sensor is near the turbo, it's fine there. no need to richen the mix up any more than it already is. if the plugs don't do it then i'm going to mess with his timing.
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yes EGT's are a great "tell-all " of the tune, i agree completely. we do not have an egt gauge on his car yet.
alex, would you suggest putting the probe in the downpipe or one of the runners of the manifold? i know on piston cars here we always put egt probes in the manifolds, but i'd like to get your input on this.
alex, would you suggest putting the probe in the downpipe or one of the runners of the manifold? i know on piston cars here we always put egt probes in the manifolds, but i'd like to get your input on this.
#23
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there are only a very few things left you could try. Does the header heat up evenly? Could it be possible that the heat is coming from one rotor? like maybe having fuel delivery problems to that rotor. That's a hell of a long shot though. And if it isn't the timing, then it has got to be that it needs to be richened up more. There is one other thing i've heard of, but it was another very rare occassion, is if it is running too rich and there was a crack like say on the bottom side of the header, where it was actually getting a good burn from the excess fuel...but i highly doubt that also. Anyways...just some spitball ideas, while i'm killin' time. Good luck
#25
12a turbo by FBII
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I seem to think I have found the problem though it doesnt make sense. I still have to think about it. But I put my old plugs back in that are gapped to .014 and drove it around tonite and no glow. The brand new plugs that I had in there were gapped to .020 which is what FBII uses. It could of been a mix between the wrong gap and maybe a bad plug. BoostedHulk, I have thought about the idea of just one rotor running lean. Still am gonna play with the timing a little and I need to get a compression test as FBII's headers glowed right before he lost his first motor.