For those of you running heat exchangers are you running just one heat exchanger? I run two the stock cobalt one (for the air bleed) and also the aftermarket CX Racing one. I'm wondering if I'm hurting myself by continuing to run the stock one
1989 Turbo Trans Am #82, 2007 Cobalt SS G85
I also run both H/E on my Cobalt... I tested IAT temps with just one and then running both and IAT's were about 10 or so degrees cooler when running the stock one as well as my aftermarket Garrett Cobra H/E.
President/Founder - 607 Motorsports
I find it hard to believe it does any good being sandwiched between the ac condenser and radiator
1989 Turbo Trans Am #82, 2007 Cobalt SS G85
So wait... you asked a question... I gave you my personal confirmed tested results and you say you find it hard to believe? Believe what you want I could care less but you may also want to consider the fact that you're also increasing the surface area and re-circulation time by leaving the stock one in there... the longer time the fluid can circulate away from the IC the cooler it will be when it gets back to it.
President/Founder - 607 Motorsports
Rodimus Prime wrote:For those of you running heat exchangers are you running just one heat exchanger? I run two the stock cobalt one (for the air bleed) and also the aftermarket CX Racing one. I'm wondering if I'm hurting myself by continuing to run the stock one
its a heat exchanger not a fmic. Your not bottle necking anything so why would it be hurting yourself? Coolant flow is coolant flow.
I have a friend with a SS/SC he has the stock HE as well as a Cobra HE running together.
FU Tuning
Im hearing several others say that they get lower temps just running the cobra only
1989 Turbo Trans Am #82, 2007 Cobalt SS G85
well instead of listening to what people say....why don't you just try it out and confirm what the flock is telling you? Use your HPT to log the diff...but thats prob to much work for ya..
Rodimus Prime wrote:Im hearing several others say that they get lower temps just running the cobra only
When my other friend had a SS/SC he did a different HE and dumpped the stock one. I datalogged both there cars on different days but similar temps, and thier temps were close to the same.
FU Tuning
JUCNBST wrote:well instead of listening to what people say....why don't you just try it out and confirm what the flock is telling you? Use your HPT to log the diff...but thats prob to much work for ya..
he wouldn't know anything about serious tuning...he only makes 298 hp
Rememeber kids... spell check is your friend
Why post if you're going to mock an actual answer with testing behind it?
Who are these "several others" and how could you be hurting yourself when in-theory what Jimmy said makes perfect sense.
Better yet why ask?
Wow intelligent response from a moron with collectively less than 298whp from his entire registry. Real tuners also don't live at home with their parents trying to sell cars parked in the yard.
Anyways back on topic, what kinda IATs are ppl seeing if theres a way of measuring that post supercharger on the Js
1989 Turbo Trans Am #82, 2007 Cobalt SS G85
Joe- I've had people say that they have saw increases in IAT without the stock heat exchanger in line and others saying that they got a decrease from removing it. I know for a fact on here theres alot of folks just running one HE which seem to have no issues at all, even without dual pass. I'm just trying to figure out why, to rip out the stock one and then have to put it back in only to find that it didn't work is alot of time that I don't have right now.
1989 Turbo Trans Am #82, 2007 Cobalt SS G85
My big question is why post this here? There might be one person on the forum that is running a 2nd H/E. It seems more appropriate for CSS.net.
Tinkles
2003 Cavalier 1SV
Bagged and Blown
hardly anyone on cssnet goes without the original, so theres really no data, and on here pretty much everyone on here does not use them, but seems to have less issues at the track with heat soak. I want to know how these folks are doing it
1989 Turbo Trans Am #82, 2007 Cobalt SS G85
As long as you have sufficient coolant flow to both heat exchangers, I don't see why 2 exchangers with more overall coolant would be less effective than one with less coolant.
The only way the OE heat exchanger might hurt you is if you use the A/C.
Also, to completly bleed out all the air in the system I would vacuum the system (with something like
this), when I did this to my car It sucked in a bunch more coolant that was previously air in the system.
On a 90* day I see a high of 130ish after blower IAT.
Ok.
To me it seems like the results would be dependent of how you have both plumbed. If you use the stock one as a "precooler" shouldnt you're IATs be lower?
Tinkles
2003 Cavalier 1SV
Bagged and Blown
air just goes right through all three items...
dont see how it would get 'less' air being sandwiched....
Familiar Taste of Poison.
Im thinking more of the temp of the air passing threw.
Tinkles
2003 Cavalier 1SV
Bagged and Blown
I run a CX Racing HE with a dual pass and Stg.2 pulley. Stig ported blower. WAI. I See IAT's 30*F above ambient when cruising. IAT's don't go up much more than 145 after a good pull on a 90+ degree day. I used to have a Cobra HE, and saw minimal improvement with the bigger CX unit.
I always assumed the problem with having too much capacity/dual heat exchangers was that once all the coolant gets heated up it is just that much tougher to cool off.
Well maybe I don't know @!#$ but I did manage to put down 313whp and run a 13.4 on street tires without the use of a Harrop so you be the judge.
Beyond posting up HPT screen shots I don't know what more proof you would need from me... My IAT temps with my car running the dual pass, meth injection and the 2 heat exchangers rarely reaches above 130 degrees... with the stock one unhooked for testing it was a bit over 140... end of story, thanks.
President/Founder - 607 Motorsports
Hey jimmy. hey hi.
313 and a 13.4. that's funny. pretty bold statement. what's your setup? because i know of 2 people that made over 300 on the m62. people running 12's with 250hp....people running 13.5's with gms2... just goes to show dyno numbers don't mean @!#$ and people like to inflate.
you know what i would like you to post up a data log of your findings because quite frankly i don't believe you.
did you do these tests in a controlled environment? when are you taking your temperatures? are you using meth while trying to test this also??
I have seen multiple tests from much more reputible sources deferring your answer to the bull@!#$ bucket.
anyways. i've already expressed this on a different forum to rodimus but for others to keep in mind...
while maybe you have more coolant, the h/e is sandwiched like said inbetween 2 heated up devices..radiator/ac condensor...
also with more coolant comes a prolonged time to cool this coolant down. it's easier to cool down a smaller amount of liquid.
you need to find the point where its beneficial to avoid heating up AND can also cool down just as quick.
think what you want but this has all been gone over before....i'll enjoy my sub IAT1 IAT2's soon
.
Lols.
