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Old 05-15-2013, 04:52 PM   #29
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I've got one of those heat generating maggies. Quarter mile pass started at 104 ended at 118. No meth.
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Old 05-15-2013, 06:04 PM   #30
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Not defending Vortech over Maggie or turbo but 12 psi on a 6.2 engine is ALOT more air moved and compressed than 8 or 9 psi. Also if your cam isn't stock then IAT's will be lower, all else the same. I'd bet the Maggie at 12 psi and stock cam would be at or over 160 on a 1/4 mile pass.

I'd love to have a TT setup.
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Old 05-15-2013, 06:26 PM   #31
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Quote:
Originally Posted by dan0617 View Post
Not defending Vortech over Maggie or turbo but 12 psi on a 6.2 engine is ALOT more air moved and compressed than 8 or 9 psi. Also if your cam isn't stock then IAT's will be lower, all else the same. I'd bet the Maggie at 12 psi and stock cam would be at or over 160 on a 1/4 mile pass.
I haven't been able to try 13psi for the whole run as I am having trouble with the boost controller plus traction is a big problem even with full slicks.

BTW, this is with a 416ci with a cam. As far as air being moved goes it should be moving more than a stock 6.2L at same 8-9 psi.
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Old 05-15-2013, 06:27 PM   #32
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I've got one of those heat generating maggies. Quarter mile pass started at 104 ended at 118. No meth.
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Old 05-15-2013, 06:43 PM   #33
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You're probably right. I just wanted to let the OP know a low 11 second Maggie car can run 18* of timing at WOT throughout the quarter mile without any KR and IAT's at the traps under 120*.
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Old 05-15-2013, 07:44 PM   #34
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It is amazing the difference in IAT's in different setups. I have the same setup and see the same IAT results as the op and I'm also trying to decide if I should do anything.
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Old 05-15-2013, 07:50 PM   #35
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I just wanted to see if it was normal. I currently have no way to log it. I do have an ultraguage though. Im sure like matt said you would never see 160 on the street this was after 4 back to back dyno pulls
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Old 05-16-2013, 11:39 PM   #36
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I had a "ah, ha!" moment after I got home from work where I read this... Pretty much all Centri's I have seen mount the MAF/IAT combo sensor after the intercooler near the TB, correct? Where is the same sensor on most Eldebrock, Maggie, Whilpple, etc installs? It's still on the air intake side before it get's compressed or run through the heat exchanger. True IAT's on one of these would need the sensor buried deep inside the intake manifold. PD's should be seeing similar temps to most car's simply equipped with CAI's.

What does everybody think? Would account for why the PD's are staying consistent during 1 run, but getting hotter after multiples.

By the way I'm very Jealous of BullF-16 and his setup!!! If at all possible I would love to buy your setup! I will be needing to save my pennies first, buy you got what I want!!!
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Old 05-17-2013, 06:50 AM   #37
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I'm pretty sure most everyone relocates their IAT sensor.

My question is whether or not the aftermarket relocated sensor is reacting quick enough to get an accurate reading. For us centri guys the one in the MAF does, but I had an aftermarket relocated one on my last setup that reacted way too slowly. Showed decent IAT's, but in reality at the end of the run the IAT sensor was way behind. IAT's were reading 30 to 40 degrees less than they actually were at the end of a 1/4 mile run.
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Old 05-17-2013, 08:59 AM   #38
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Quote:
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I'm pretty sure most everyone relocates their IAT sensor.

My question is whether or not the aftermarket relocated sensor is reacting quick enough to get an accurate reading. For us centri guys the one in the MAF does, but I had an aftermarket relocated one on my last setup that reacted way too slowly. Showed decent IAT's, but in reality at the end of the run the IAT sensor was way behind. IAT's were reading 30 to 40 degrees less than they actually were at the end of a 1/4 mile run.

On a launch at the strip, what distance does an L99 car travel and what is the ET to the top of FIRST GEAR! Look at my log and see the IAT actually go down and get cooler with the movement of the car from the starting line to the top of first gear.....IMO that's a pretty fast response to a change in IAT.
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Old 05-17-2013, 09:25 AM   #39
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I just can't imagine a top mount blower (or any blower) going from 104 degrees F to 118 degrees F on a 1/4 mile pass. Only 14degrees of increase in IAT according to your log. No meth or chiller. Something just seems amiss.

I start just above ambient and end at about 140. About a 60 to 70 degree change. If it is a 2nd run with little cool down time it pushes up to 160 by the end. I know the stock cam hurts the IAT's but I didn't think by that much.
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Old 05-17-2013, 10:01 AM   #40
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I've got about 150 of these logs saved. Here's another one done with my SCT tool. I also have LS2 EDIT. They all pretty much read the same way. This was a run done after previous runs with a cool down between runs. The launch IAT was 41C or 106F and the finish line was 50C or 122F. I'm not clever enough to make this stuff up!
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Old 05-17-2013, 10:03 AM   #41
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I've got about 150 of these logs saved. Here's another one done with my SCT tool. I also have LS2 EDIT. They all pretty much read the same way. This was a run done after previous runs with a cool down between runs. The launch IAT was 41C or 106F and the finish line was 50C or 122F. I'm not clever enough to make this stuff up!
Sorry the log didn't attach.
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Old 05-17-2013, 10:07 AM   #42
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Ooh I'm not saying you are making anything up. By saying hard to believe I mean it seems either some sensor or something isn't reading right, or IAT's on top mounts aren't as bad as everyone makes them out to be.

One other thing with my IAT's is that I haven't made it to a track yet, so all my readings are on a wot pass immediately after decelerating on the street. The more reading I do I'm finding that decelerating seriously increases IAT's and heat soak.

Not sure yet if the OP and I need to change anything yet, or not.
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