why my IATs so high?
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On The Tree
Joined: Sep 2004
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why my IATs so high? I have the STS kit, and with no meth and IC on 3psi, my IATs were WAY over 150 (nearing 180 after 15 sec run)
i did a full run to 150 and thats actually when i broke my motor... i formatted my comp so the ataps are gone, but i know if i stayed on boost for more then 4-5 secs it would near 160... is that normal with the STS?
can my IAT gone bad? ( i highly doubt this)
I know with the STS kid (2 of my friends have it) u dont near 150 with 3psi... u get close to 150ish on 5psi, so why did mine heat up so much?
maybe its the crazy NA cam i had? (230 / 244, .510 / .540 112 LSA/LT1) with that crazy exhaust duration and 112 LSA maybe i was getting some exhaust into the intake which caused the temps to go up a lil bit?
i did a full run to 150 and thats actually when i broke my motor... i formatted my comp so the ataps are gone, but i know if i stayed on boost for more then 4-5 secs it would near 160... is that normal with the STS?
can my IAT gone bad? ( i highly doubt this)
I know with the STS kid (2 of my friends have it) u dont near 150 with 3psi... u get close to 150ish on 5psi, so why did mine heat up so much?
maybe its the crazy NA cam i had? (230 / 244, .510 / .540 112 LSA/LT1) with that crazy exhaust duration and 112 LSA maybe i was getting some exhaust into the intake which caused the temps to go up a lil bit?
First,your not suppose to boost ant turbo that long(did the same thing in my wife's GN and blew it up)
The highest I've seen is 149 degree's from 6lbs so far,so maybe it was in the tune or possibly the Cam.
The highest I've seen is 149 degree's from 6lbs so far,so maybe it was in the tune or possibly the Cam.
Originally Posted by Slowhawk
First,your not suppose to boost ant turbo that long(did the same thing in my wife's GN and blew it up)
The highest I've seen is 149 degree's from 6lbs so far,so maybe it was in the tune or possibly the Cam.
The highest I've seen is 149 degree's from 6lbs so far,so maybe it was in the tune or possibly the Cam.
huh? not really sure what you mean...not supposed to boost a turbo for so long? What? The intake temps are normal. That was in 90+ degree humid south florida weather. Most people up north see 150 as their upper limit due to more dry cool weather.
Cam overlap causing it to push hot air into intake? Extremely doubtful!
Thread Starter
On The Tree
Joined: Sep 2004
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I see...
good point... hot FL air would def not help, and humidity would not help if not make it even worse...
slowhawk, what do u mean not supposed to boost for that long? 0-150 is prolly like a 20-30 sec thing for me
good point... hot FL air would def not help, and humidity would not help if not make it even worse...
slowhawk, what do u mean not supposed to boost for that long? 0-150 is prolly like a 20-30 sec thing for me
Originally Posted by SSnakekiller
huh? not really sure what you mean...not supposed to boost a turbo for so long? What? The intake temps are normal. That was in 90+ degree humid south florida weather. Most people up north see 150 as their upper limit due to more dry cool weather.
Cam overlap causing it to push hot air into intake? Extremely doubtful!
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Originally Posted by Tiago
what do you consider excessive?
I had extra cyl clearance honed in for that extra expansion that will occur under long pulls
I had extra cyl clearance honed in for that extra expansion that will occur under long pulls
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Originally Posted by seal
never thought 1 single run woulda broke stuff...
I agree the stock gaskets are not great for boost, but the reason you blew a gasket is most likely because:
1. You were detonating or
2. Engine was getting hot or
3. Your IAT's were really high
doing something like MLS will work great and doing that requires no block modification.
0 - 150 runs are fine with proper tuning and cooling
btw we have made almost 600rwtq on stock motor. dyno results will be up soon
1. You were detonating or
2. Engine was getting hot or
3. Your IAT's were really high
doing something like MLS will work great and doing that requires no block modification.
0 - 150 runs are fine with proper tuning and cooling
btw we have made almost 600rwtq on stock motor. dyno results will be up soon
hhhmmm, when is one of these STS cars going to go fast. Lets stop with Supra dyno number stuff and see one fly down the track in the 9 second area, cause with 600 to the tires thats close to were you should be.
Originally Posted by hellbents10
hhhmmm, when is one of these STS cars going to go fast. Lets stop with Supra dyno number stuff and see one fly down the track in the 9 second area, cause with 600 to the tires thats close to were you should be.
Originally Posted by SSnakekiller
I agree the stock gaskets are not great for boost, but the reason you blew a gasket is most likely because:
1. You were detonating or
2. Engine was getting hot or
3. Your IAT's were really high
doing something like MLS will work great and doing that requires no block modification.
0 - 150 runs are fine with proper tuning and cooling
btw we have made almost 600rwtq on stock motor. dyno results will be up soon
1. You were detonating or
2. Engine was getting hot or
3. Your IAT's were really high
doing something like MLS will work great and doing that requires no block modification.
0 - 150 runs are fine with proper tuning and cooling
btw we have made almost 600rwtq on stock motor. dyno results will be up soon
This thursday will tell the tale of the gt70 sts on a fmic forged h/c setup
Originally Posted by PurEvl
Well if those are geared toward my setup, your wrong. My iats were 68, engine not even close to 200. And certainly no detonating. **** the timing was 14 and the boost was 10psi. I got mls now, not sure why the gasket blew, it was a felpro but im hoping the gt70 is just making that much more power then the d1 at 10 psi This thursday will tell the tale of the gt70 sts on a fmic forged h/c setup
This thursday will tell the tale of the gt70 sts on a fmic forged h/c setup10psi is quite a bit on a stock motor. Still not sure why you blew the felpro.
The gt70 setup should be interesting...
Originally Posted by SSnakekiller
Yeah I have heard to stay away from the Felpro and Cometic. Get MLS and be done.
10psi is quite a bit on a stock motor. Still not sure why you blew the felpro.
The gt70 setup should be interesting...
10psi is quite a bit on a stock motor. Still not sure why you blew the felpro.
The gt70 setup should be interesting...
My motor isnt even close to stock so this should be good. I replaced my SC cam as well with a cam more geared to turbo, didnt feel like having a peak of 6800 with the gt70 so hopefully the new cam will bring it down to 5800ish Lot's of boost in a motor for a long period of time will heat the cylinder/heads up alot and can easilly cause a head gasket or piston to blow.Now,I would point towards the tuning/cam as the problem with the poster because it was only 3lbs.
Yes,a Cam does affect the heat in the motor.Not the inlet temp but the block temp.
Even Turbo deisel trucks have problems with them overheating while holding boost/load to long and they are built for Turbo's.
Yes,a Cam does affect the heat in the motor.Not the inlet temp but the block temp.
Even Turbo deisel trucks have problems with them overheating while holding boost/load to long and they are built for Turbo's.
Originally Posted by Armageddon
purevl, your setup sounds identical to mine. H/C Forged 370 GT70 FMIC. I'm having clutch troubles, but when thats straightened out I should be able to get some numbers.
TECH Addict
Joined: Nov 2001
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From: Bellevue, Wa
the felpros suck. they seem to blow out all the time. happened to a car here with a 370 and 10psi on a D1. Blew out in a day or two, switched to the GM gaskets and the car has been running for months with more boost, no problems.