CAI"S, OTR CAI's , IAT and HEAT SOAK

**jsmith564`** · 08-30-2009, 04:49 PM

Well, this is a topic i wanted to bring up. as this is talked about in the gto forum.

over in australia they make an "otr" cai (over the radiator) kit. and i've been looking hard for one over here in the U.S. but come up short handed for the 2004 gto. I have a K&N CAI and have noticed no real gain at all.

the reasion i bring this up is b/c i have had this car for a year, during cool weather of last year i was over the road working, this year i started the car up and for some reasion before it was fully warmed up during a cool moring, mashed the gas and the damn car hauled ass.. i mean in a way that has me looking into this heak soak problem.

if any one fallows me so far then you can relate to haveing miss all this power during the day after the car is warmed up, during a warm day, after things get heat soaked. the IAT reads hotter air then ambient. which pulls timing and well.. a loss of power. to make a longer story kind of short. after hours, even days of reading.. here is what it boils down to me.

1st.. find a way to get cooler air in..
2nd.. take advantage of that cooler air

how? well after seeing many different intake set ups tested, seems that an OTR CAI wins hands down. Useing a better thermistor (omega.com part # 44005) will help the computer pick the best timing, and pick it faster to aid in better performance.

below are a few links to relate to the matter.. i cant possibley go threw everything i've been reading in on thread. when funds are better i plan on getting down to this heak soak problem.. if any one has anything to add please chime in... i/we could use all the info we can get on the matter.

this is a good write up on a DIY OTR CAI; http://www.gtoforum.com/f38/how-diy-...ing-56k-18805/

or for the ls2 guys; http://marylandspeed.com/vararam-col...to-p-2246.html

IAT relocation write up; http://www.ls1gto.com/forums/showthr...sor+Relocation

**0rion** · 08-31-2009, 09:40 AM

maybe gto1 will chime in here.....he went to a otr set up this year and solved his heat soak issues so he should be able to steer you in the right direction.

**6.0LiterImportEater** · 08-31-2009, 11:19 AM

Heat soak I have come to just live with. It doesnt take much time before these engines create extensive heat. I take a 5 min drive and then lift the hood just to get basked in the face with a nice blow of really hot air haha. I do recommend if your changin plugs not to even the run the car that day or you will wait around six hours.....i know haha. So in terms of IAT relocation I don't think it will benefit in the long run. Short runs of the engine yes but after 15 mins in warm weather everything under the hood is heat soaked and nothing you can do about that unless you want to drive around with no hood.

A SD tune will help along with pulling cool air into the intake thru the OTRCAI. The rest I think is pointless and stated above is where I'm going.

**GTO1_OHIO** · 08-31-2009, 02:28 PM

Svede1212 in michigan makes them custom for the 04.

local thread

http://www.ls1.com/forums/showthread.php?t=113393

Install and dyno tune results

http://www.ls1gto.com/forums/showthread.php?t=313016

Here are threads I made on running it at the track

http://www.ls1gto.com/forums/showthr...ghlight=OTRCAI

http://www.ls1gto.com/forums/showthr...ghlight=OTRCAI

**jsmith564`** · 08-31-2009, 02:50 PM

i read these threads... good reads
from what i have read, svede1212's intake is working out well for those who have intalled it. i replied to one of his posted in gtoforum. gto1.. are you useing the omega?

**GTO1_OHIO** · 08-31-2009, 05:33 PM

Originally Posted by jsmith564`

i read these threads... good reads
from what i have read, svede1212's intake is working out well for those who have intalled it. i replied to one of his posted in gtoforum. gto1.. are you useing the omega?

No. I may try it next year.

The temps supposed to be low 60s after work tomorrow so the cars up on the trailer ready to go to the track. I want to see if my 60s drop in cooler weather over last year with this intake.

**ls1fan74** · 09-03-2009, 09:04 AM

Will removing that underhood insulation (for 05-06 hoods) and letting air flow freely into the engine bay help any?

What about wrapping the intake tube in that aluminum/fiberglass insulation from the hardware store? I def noticed the BLAST of hot air when you open the hood after driving for more than ten mins....