Reducing IAT for racing

[wreckwriter]

Car is a Pontiac G8 GT used exclusively for bracket racing, zero street use. Engine is stock bottom end 6.0 with cam and multiple bolt-on parts. Running a Procharger D1SC at 10-11 psi boost with a 2 core air to air intercooler. Dynos 618/529, fuel is 110 lead race gas. Best runs are 11.01 1/4 / 6.99 1/8 with slipping trans (being rebuilt now).

http://i266.photobucket.com/albums/ii262/wreckwriter/2011-03-07_13-22-48_933.jpg

The biggest issue I have is high IATs. I'm seeing anywhere between 160-200 degrees F at the end of a run. The car picks up 3-4/10s in the eighth mile at night. Lately I've been researching ways to get the temps down. As you can see in the engine pic, one of the biggest issues is the crappy intake location. Not only is it deep in the engine compartment but its also right over the header.

Towards solving this problem I'm going to be mounting a good sized hood scoop and fabbing a turkey pan type air box. This should help a lot but I'm thinking it won't completely solve the IAT issues on hot days. Below are some other options I'm looking at with the pros and cons as I see them. I'm looking for opinions and real-world experiences as to what you think my best options are....

Larger air to air intercooler
Pros- easiest install
Cons- intial cost, unlikely to drop temps drastically

Air to Water intercooler
Pros- likely the most drastic temp drop
Cons- complex install due to limited space, quantity of ice needed for a track day appears to be prohibitive (I'm a one man operation, have Suburban and open trailer, no way I can carry a couple hundred pounds of ice per track day)

Meth injection
Pros- easy availability
Cons- Uncertain how much it will actually lower IATs

Nitrous or CO2 intercooler spray bar
Pros- likely to provide good temp drop
Cons- Uncertain how much gas used. Might require I carry multiple bottles per track day which will raise both initial and ongoing costs and hassle factor

[G8GTSBM]

How about custom air inlet piping to route that filter to a better location.
Since this is a strip only car you will have more choices where the filter can be located.

[locrzn#92]

That is exactly why I didn't buy the procharger. Really thats the only reason, just the poor location of the filter. Cause they some serious hp and torque. Meth would help the most as it will cool the charge into the intake and make an additional 30 hp. I just don't know if there is room for intake tubing to relocate the filter. That would definetly be the best.

[G8GT721]

http://www.alcoholinjectionsystems.com/p102/Stage-2-Competition-Trunk-Mount-Water-Methanol-Injection-System/product_info.html

They claim 50-250 degree drop in iat. 600 bucks and probably a Saturday afternoon install plus tuning doesn't seem too bad.


Sent from my iPhone using Tapatalk

[wreckwriter]

How about custom air inlet piping to route that filter to a better location.
Since this is a strip only car you will have more choices where the filter can be located.

Other than going to a scoop like I'm planning; no room.

[wreckwriter]

http://www.alcoholinjectionsystems.com/p102/Stage-2-Competition-Trunk-Mount-Water-Methanol-Injection-System/product_info.html

They claim 50-250 degree drop in iat. 600 bucks and probably a Saturday afternoon install plus tuning doesn't seem too bad.


Sent from my iPhone using Tapatalk

My tuner does not believe it will drop anywhere near that much (not even the low end of the claim). And by the time you add the required upgrades its almost 800.

[G8GT721]

My tuner does not believe it will drop anywhere near that much (not even the low end of the claim). And by the time you add the required upgrades its almost 800.

That seems like a lot, that's why I said claim. Check with zosoboogie, he had meth and lives in the south and raced a lot. He will probably be able to give you first hand experience.


Sent from my iPhone using Tapatalk

[bwooten492]

You couldn't do a air to water with an ice box in the trunk?

Something like what is in this Vette? (sorry its a really long thread)

http://www.ls1tech.com/forums/texas-members/1306565-rcc-twin-turbo-build-update-12.html

[wreckwriter]

You couldn't do a air to water with an ice box in the trunk?

Something like what is in this Vette? (sorry its a really long thread)

http://www.ls1tech.com/forums/texas-members/1306565-rcc-twin-turbo-build-update-12.html

Yea, I could. Only problem is my inability to carry a couple hundred pounds of ice per race day. truck is already jammed.

[Darkmanx]

i was gonna say install a air to water intercooler and use water wetter , distilled water and a icebox that should get your a good drop in temp. The icebox shouldnt be that expensive you can pick one up offline for cheap

[Patrick G]

Tom, air to water is your best bet. You don't need ice. The water will be more temperature stable for a longer period than air to air. But yes, the stock air inlet location is less than ideal for reducing temps. What about adapting a Vortech air hat? On the Camaros and G8s, their head unit has an air hat that loops back around to the front to grab cooler air.

[SpeedRacerX]

Tom, air to water is your best bet. You don't need ice. The water will be more temperature stable for a longer period than air to air. But yes, the stock air inlet location is less than ideal for reducing temps. What about adapting a Vortech air hat? On the Camaros and G8s, their head unit has an air hat that loops back around to the front to grab cooler air.

Tom, I know I've posted these before. You can't make something like this work? I think this is what Patrick G is referring to...

http://i631.photobucket.com/albums/uu40/SpeedRacerXPB/g8_16.jpg

http://i631.photobucket.com/albums/uu40/SpeedRacerXPB/gto_uh2.jpg

[1ChargedG8]

^This could work, the problem is that you might need to relocate the coolant overflow tank. I actually didn't get rid off the water meth, im still spraying with a 175ml nozzle and lowered the pump pressure a bit, the max IAT temp drops I've seen here in Arizona is about 30 degrees with the snow performance kit. Even though I'm running straight E85 i still see the IAT sky rocketing to about 190 degrees without spraying water/meth, and this in with an ambient temp of 103 degrees.

[wreckwriter]

There isn't room for the Vortec type plumbing; I've checked and it just won't work. I've already got people lined up to do the scoop and air box, that will get me real fresh air from the top and will be better than anything else since it won't require more big bends in the tubing.

Do you think there's room inside the front fascia for an air water of sufficient size? I can put the tank in the trunk with no problem.

[gr8lover]

There isn't room for the Vortec type plumbing; I've checked and it just won't work. I've already got people lined up to do the scoop and air box, that will get me real fresh air from the top and will be better than anything else since it won't require more big bends in the tubing.

Do you think there's room inside the front fascia for an air water of sufficient size? I can put the tank in the trunk with no problem.

You could just hook up a external water pump that cycles cold water thru your system in-between runs......... put in some external quick connect hookups that you just connect after the race to cool the engine down.... alot of the "big" guys do it.... we do it on our Malibu and it cools it down in a hurry...... one bag of ice in the water will last along time..... and it doesnt add weight to your car.....

[neuralfraud]

I would suggest a system similar to, or even from this guy: http://www.alkycontrol.com/ he goes by Razor on turbobuick.com and makes a pretty good system, just use regular alcohol. The idea here of course is to lower cylinder temperatures as well as increase octane to allow higher psi and the TR guys jumped all over this stuff a few years back because it works; I see no reason why it wouldn't help you at all. Keep in mind they're all running air to air intercoolers too.

Some guys are even using propane as it seems to have a more profound cooling effect, but those are about twice as expensive. HTH

[gr8lover]

May I be so kind to suggest :

http://www.na-motorsports.com/Tracks/AK/AlaskaRP.html

:)..... lol....

[matthewo]

can you use the stock hood scoops and gut all the plastic and take out the hood liner and make a fiberglass mold of the bottom of it.

then route the air into a custom air box where your cone filter is right now. personally that would be my first try before cutting up the hood, but then again hoods are not that expensive for a g8, if you plan to ever go back to stock.

but i think getting cool air to start with will really help dropping the iat. then after that you might just be able to get away with a 3 core intercooler and maybe you could spray the intercooler with no2 or co2 for runs.

[daniel9357]

I am trying to do they same thing with my magnacharged g8, I think im about to add this as a 2nd heat exchanger..http://www.frozenboost.com/product_info.php?cPath=217&products_id=1026&osCsid=055bd78970fd3b40e0c989816c71fb82....would look good beind the lower grills also.

[STL_G8GT]

can you use the stock hood scoops and gut all the plastic and take out the hood liner and make a fiberglass mold of the bottom of it.

then route the air into a custom air box where your cone filter is right now. personally that would be my first try before cutting up the hood, but then again hoods are not that expensive for a g8, if you plan to ever go back to stock.

but i think getting cool air to start with will really help dropping the iat. then after that you might just be able to get away with a 3 core intercooler and maybe you could spray the intercooler with no2 or co2 for runs.

I think I remember reading about this when the G8 first came out... the stock hood scoops don't sit high enough based on the lines of the nose of the car to actually capture any appreciable amount of air.

[wreckwriter]

My scoop will be 9 inches high.
Cutting the stock hood doesn't bother me a bit.


Sent from my DROID2 using Tapatalk

[shane]

i would suggest meth

[popsicle]

Check with zosoboogie, he had meth and lives in the south and raced a lot.

He had a Maggie though

[-Ray-]

There isn't room for the Vortec type plumbing; I've checked and it just won't work. I've already got people lined up to do the scoop and air box, that will get me real fresh air from the top and will be better than anything else since it won't require more big bends in the tubing.

Do you think there's room inside the front fascia for an air water of sufficient size? I can put the tank in the trunk with no problem.

Did you talk to Joe?

[wreckwriter]

Did you talk to Joe?

I sent him email but didn't hear back yet. I found a local guy so I think I'm good on that part.

[Devilish34]

i would suggest meth

this^^

[WickedMom]

Look up the superchiller on camaro5... If you still have AC


Sent from my amazing and awesome iPhone4

[wreckwriter]

Look up the superchiller on camaro5... If you still have AC


Sent from my amazing and awesome iPhone4

I saw that. I do not have a/c though.

[Mier]

Look up the superchiller on camaro5... If you still have AC

That is freakin awesome. That will have to be added on my list, thanks so much for bringing that to my attention.