HELP - IAT issue - HELP
10-11-2009, 05:17 PM
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HELP - IAT issue - HELP Well, the last time on the dyno my IAT's reached a crazy 220degrees F, and yes I was almost going to 
seeing that on the scanner.
I figured out a big portion of the problem though, I had the turbo inlets completely off, so the turbos were breathing from the compressor inlet, and a few inches above and behind the turbos are the exhaust manifold/ turbine housing, which was heating the crap out of the surrounding air and causing this. This was just a temporary set-up which we needed to do to rule out the silicon coupler sucking onto itself causing "misfire-like" symptoms (solved).
Will be installing the turbo inlet pipes, which should allow the car to breathe from the front, but still the turbo OUTLET pipe passes about an inch from the manifold, yes all hot/cold pipes are ceramic coated inside out, but still IAT's rise quicker than id like them to.
Im doing an intercooler mod, which can only do much. I have a feeling much of the airflow is passing out the sides of the intercooler and not THROUGH it, so im adding fins on the sides to make sure it flows through, that itself should be an improvement on the high-way at high speeds, but thats no match for a manifold heating up the intake temps
Question: Will heat wrapping the turbo inlet and outlet pipes (which are already ceramic coated - spray) do any difference in how much heat soaks into the pipes from the manifolds?
Does adding a turbo blanket do anything?
what works better, heatwrap or heat reflector sheilds for my case?
My final resort would be to add the meth injection, but I was trying to stay away from that as much as possible.
What are normal IATs for turbo cars running 12-13PSI of boost??
EDIT: posted log with car going 7PSI for very few moments, do IATs look fine?
seeing that on the scanner.I figured out a big portion of the problem though, I had the turbo inlets completely off, so the turbos were breathing from the compressor inlet, and a few inches above and behind the turbos are the exhaust manifold/ turbine housing, which was heating the crap out of the surrounding air and causing this. This was just a temporary set-up which we needed to do to rule out the silicon coupler sucking onto itself causing "misfire-like" symptoms (solved).
Will be installing the turbo inlet pipes, which should allow the car to breathe from the front, but still the turbo OUTLET pipe passes about an inch from the manifold, yes all hot/cold pipes are ceramic coated inside out, but still IAT's rise quicker than id like them to.
Im doing an intercooler mod, which can only do much. I have a feeling much of the airflow is passing out the sides of the intercooler and not THROUGH it, so im adding fins on the sides to make sure it flows through, that itself should be an improvement on the high-way at high speeds, but thats no match for a manifold heating up the intake temps
Question: Will heat wrapping the turbo inlet and outlet pipes (which are already ceramic coated - spray) do any difference in how much heat soaks into the pipes from the manifolds?
Does adding a turbo blanket do anything?
what works better, heatwrap or heat reflector sheilds for my case?
My final resort would be to add the meth injection, but I was trying to stay away from that as much as possible.
What are normal IATs for turbo cars running 12-13PSI of boost??
EDIT: posted log with car going 7PSI for very few moments, do IATs look fine?
Last edited by ayousef; 10-11-2009 at 05:40 PM.
10-11-2009, 05:44 PM
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Well, the last time on the dyno my IAT's reached a crazy 220degrees F, and yes I was almost going to seeing that on the scanner.
I figured out a big portion of the problem though, I had the turbo inlets completely off, so the turbos were breathing from the compressor inlet, and a few inches above and behind the turbos are the exhaust manifold/ turbine housing, which was heating the crap out of the surrounding air and causing this. This was just a temporary set-up which we needed to do to rule out the silicon coupler sucking onto itself causing "misfire-like" symptoms (solved).
Will be installing the turbo inlet pipes, which should allow the car to breathe from the front, but still the turbo OUTLET pipe passes about an inch from the manifold, yes all hot/cold pipes are ceramic coated inside out, but still IAT's rise quicker than id like them to.
Im doing an intercooler mod, which can only do much. I have a feeling much of the airflow is passing out the sides of the intercooler and not THROUGH it, so im adding fins on the sides to make sure it flows through, that itself should be an improvement on the high-way at high speeds, but thats no match for a manifold heating up the intake temps
Question: Will heat wrapping the turbo inlet and outlet pipes (which are already ceramic coated - spray) do any difference in how much heat soaks into the pipes from the manifolds?
Does adding a turbo blanket do anything?
what works better, heatwrap or heat reflector sheilds for my case?
My final resort would be to add the meth injection, but I was trying to stay away from that as much as possible.
What are normal IATs for turbo cars running 12-13PSI of boost??
EDIT: posted log with car going 7PSI for very few moments, do IATs look fine?
seeing that on the scanner.I figured out a big portion of the problem though, I had the turbo inlets completely off, so the turbos were breathing from the compressor inlet, and a few inches above and behind the turbos are the exhaust manifold/ turbine housing, which was heating the crap out of the surrounding air and causing this. This was just a temporary set-up which we needed to do to rule out the silicon coupler sucking onto itself causing "misfire-like" symptoms (solved).
Will be installing the turbo inlet pipes, which should allow the car to breathe from the front, but still the turbo OUTLET pipe passes about an inch from the manifold, yes all hot/cold pipes are ceramic coated inside out, but still IAT's rise quicker than id like them to.
Im doing an intercooler mod, which can only do much. I have a feeling much of the airflow is passing out the sides of the intercooler and not THROUGH it, so im adding fins on the sides to make sure it flows through, that itself should be an improvement on the high-way at high speeds, but thats no match for a manifold heating up the intake temps
Question: Will heat wrapping the turbo inlet and outlet pipes (which are already ceramic coated - spray) do any difference in how much heat soaks into the pipes from the manifolds?
Does adding a turbo blanket do anything?
what works better, heatwrap or heat reflector sheilds for my case?
My final resort would be to add the meth injection, but I was trying to stay away from that as much as possible.
What are normal IATs for turbo cars running 12-13PSI of boost??
EDIT: posted log with car going 7PSI for very few moments, do IATs look fine?
10-11-2009, 05:47 PM
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10-11-2009, 07:19 PM
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man, I really hope you're right. Tuning will reduce this a little also, getting the timing up, and a leaner AFR would reduce my exhaust gas temps which end up soaking on the inlet pipes
10-12-2009, 03:07 AM
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Why you don't use Water/Alky injection?
I'm using it on all my FI cars, Denali with Paxton and My moded 997TT.
That’s will help you.
We have 6,2 Denali in Dubai and now at summer the IAT is lower that the outside temperature # by 5-10* min.
Isn't that enough for you?
I'm using it on all my FI cars, Denali with Paxton and My moded 997TT.
That’s will help you.
We have 6,2 Denali in Dubai and now at summer the IAT is lower that the outside temperature # by 5-10* min.
Isn't that enough for you?
10-12-2009, 04:26 AM
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200+ is too high,tt and blower cars that we worked on max temps were 120-130F* with our hell's temps over here lol.
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10-12-2009, 08:48 AM
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ill see what happens in those few days though.
10-12-2009, 08:57 AM
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Where is your IAT sensor mounted? I had mine mounted in a Edelbrock cast intake and it was reading crazy IAT's. Once I moved it to an inlet pipe it started reading correctly.
10-12-2009, 10:40 AM
#11
+1 about the IAT sensor position. I have mine in a bad spot and was told to move it so it would read better. I think you should do that and find out if that helps. What set-ups are you guys running to have your IAT's at 125 at full boost are you spraying meth or just IC'd?
10-12-2009, 04:08 PM
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I removed the IAT sensor from the intake and put it between the throttle and the Methanol Nozzle, so when i ran empty tank the IAT sensor will read the normal temperature and starts to pull timing if needed to be in the safe side.
10-12-2009, 04:19 PM
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Ull understand what im trying to imply in a PM, because what im gonna say might be a little sensitive for "some"
10-12-2009, 04:20 PM
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I have no problems with the IAT sensor location though, its placed properly, a few inches before the throttle in the inlet pipe, so thats not my issue.
Ill post up my findings soon after I do a few changes.
Ill post up my findings soon after I do a few changes.
