High IATs - Causes and solutions?
09-19-2007, 07:51 AM
#112
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Originally Posted by dhpro
Spent the day on the dyno yest to make some passes with and without the cats...they're all good. It was noteable tho that we ran it with open headers and it lost 80rwhp. We pulled ~440rwhp and 501tq (uncorrected) in the cooler weather. As its tuned pretty conservatively with only 14* timing, I suspect that if we crank it up a bit with the coller temps now it'll prob find another 60ish ponies. Either way, its a beast and I'm pretty happy - and so's the State after my speeding ticket! 
It'll get fixed up once we play around with cams and pulleys over the next few months. 
I'll try and post the new Dyno results today...R/
It'll get fixed up once we play around with cams and pulleys over the next few months. I'll try and post the new Dyno results today...R/
09-20-2007, 06:37 AM
#114
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I think that I read all of these posts and I didn't see where you verified that the IAT sensor is accurate. Has this been done? I replace them from time to time due to overly high readings. If you have data compare it to ambient after it's sat overnight before it's running.
Vernon
Vernon
09-20-2007, 07:11 AM
#115
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Originally Posted by Manic Mechanic
I think that I read all of these posts and I didn't see where you verified that the IAT sensor is accurate. Has this been done? I replace them from time to time due to overly high readings. If you have data compare it to ambient after it's sat overnight before it's running.
Vernon
Vernon
09-20-2007, 07:11 AM
#116
Originally Posted by Manic Mechanic
I think that I read all of these posts and I didn't see where you verified that the IAT sensor is accurate. Has this been done? I replace them from time to time due to overly high readings. If you have data compare it to ambient after it's sat overnight before it's running.
Vernon
Vernon
09-26-2007, 06:50 AM
#117
LATEST: did 1400 miles in last 10days...pissing oil all over the place. Before all the miles found small oil pool on top on head covers and on pass side motor mount. After all the miles whole bottom of truck is covered, had to add 2 qrts so far. All the plug heat socks are soaked. Valve covers dont seem to be the prob as the heads are clean above the headers. Drivers side looks like a small head gasket leak...gonna do a leak down test and see if the cylinders have been washed down and my rings are shot (hopefully not or at least its only rings if so 
). Half way thru the mileage the SNOW meth pump went haywire and drowned my engione in fluid stalling the motor...thankfully it didn't hydrolock! 
I'm guessing this is the ultimate reason for the high IAT/low power probs...the scarey part is my builder/installer think we only need to retorq the heads! It'll be headed back to the shop in the next few weeks. I TAKE BACK EVERYTHING BAD I EVER SAID ABOUT ANYTHING AND EVERYBODY - PLS JUST MAKE MY CAR RUN BEFORE I GO BROKE 
). Half way thru the mileage the SNOW meth pump went haywire and drowned my engione in fluid stalling the motor...thankfully it didn't hydrolock! I'm guessing this is the ultimate reason for the high IAT/low power probs...the scarey part is my builder/installer think we only need to retorq the heads! It'll be headed back to the shop in the next few weeks. I TAKE BACK EVERYTHING BAD I EVER SAID ABOUT ANYTHING AND EVERYBODY - PLS JUST MAKE MY CAR RUN BEFORE I GO BROKE
09-26-2007, 01:16 PM
#118
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Sorry you are having so many problems with your build. I am sure you will get it all sorted out. I don't think re-torqing the heads is going to fix your problem. Did you ever think about having it checked out by another mechanic?
09-26-2007, 03:22 PM
#119
Originally Posted by bagged7104SS
Sorry you are having so many problems with your build. I am sure you will get it all sorted out. I don't think re-torqing the heads is going to fix your problem. Did you ever think about having it checked out by another mechanic?
