Is the rolling radius smaller with this slick than the stocker, and how much lighter is that steely than the stocker? Smaller rolling radius and less weight will help a little with the floppy tire. Also I would look into another steely for the rear with a small skinny tire so you don't have to drag those big ass 18's down the track. My average trap is 105 and around 2500 feet above sea level. My best run was a 13.7 @106, 2.4 60'. I would love to throw some axle's, slicks, and a clutch on the car and see what happens but I just don't want Anny up that much cash at once. Any way I think you have a good chance at 12's and it will be one hell of a ride launching this car at a high rpm and not roasting the tires.



Ok definitely not trying to be a dick, but the statement you made is not true. The HE will not add a single HP to your car. Its job is to keep heat down so you do not loose power due to high temps like heat to your blower. So your not getting any better performance than when your car is cool. So yes it is good for the car and allows less of a cool down period for the car but not give any horse power. If you don't have an HE the smart thing to do would be to allow your car to cool in between runs or use ice bags on the blower to speed up the process. Unless you are running a really small pulley I don't think the 14 sec or less it takes to get down the track is going to heat up the blower enough to hurt your performance on a cool start run. Now the second run with no cool down or HE is were heat soak starts to kill your performance. Now when you are running something lower than like a 2.8 it may create enough heat to lesson performance before you get down the track do to the over spin and extreme heat you are putting out. Ok I'm done sorry for the rambling.

 

ok, well, you are pretty much dead wrong. I had a theory that adding a bigger heat exchanger does more than just keep you from heat soaking. So I went out and proved it. The theory is, that as you are drag racing, you car is developing so much heat from the eaton that you are losing hp. Even with the stock heat exchanger. So I threw on a cobra heat exchanger and went to the track. I gained A LOT! I went from trapping 96mph to 101mph from just adding a cobra heat exchanger to my car. I also went from trapping about 77mph in the 1/8th to 80mph in the 1/8th. So top end got real strong. You should read up on my write up I did. Click on the link below.

https://www.cobaltss.net/forums/2-0l-lsj-performance-tech-47/different-approach-modding-your-cobalt-75313/

 

that is pretty much the same thing that I said. BUT NO IT DOES NOT ADD POWER! You are dead wrong. And yes I do agree that it helps

 

ok, so How does it not add power when I gained 5mph? Isn't that what makes you gain MPH in a drag race? It is basically adding more power because it is taking the heat away that the blower generates. Less heat=more power. Which means that Heat exchangers ADD power cause they take away heat and ADD POWER!

If you don't get that then I don't know what to tell you. It adds power man. Otherwise I wouldn't have gained 5mph from just a heat exchanger install.

 

I don't know how to explain this any better to you, but if you have any knowledge of how this works and I assume you do, it only keeps you from loosing power and or damaging something do to getting to hot. Plain and simple. There are many different variables on why you could of picked up 5mph. So I am not going to argue with you on what I know, someone please back me up on this.

 

I understand that. But in our case, (a blower application) adding more cooling does in fact add power, because of all the heat that the blower makes. It's just like when you upgrade intercoolers on turbo applications. A intercooler upgrade is in fact a power upgrade, even though it is nothing more than a cooling mod. JUST LIKE OUR HEAT EXCHANGER UPGRADE.

 

Ugh.

It didn't add any DIRECT power, it simply keeps you from LOSING power due to heat soak and such which in turns lets you KEEP your power.

 

I understand that. but in doing that, it adds power that isn't there due to heat. If an intercooler on a turbo car is a power upgrade, then a heat exchanger/meth kit is a power upgrade on a blower car.

 

I give up your hopeless

 

Yay! I Win!

 

i actually agree with ralli... Maybe in your terms it is not a power upgrade... But either way the eaton makes its heat

so you take a 2.8 pully car with 60's and a tune- say 250 hp due to the tune, or overheating
now take a 2.8 pully car with 60's and a tune, and a heat exchanger- the car isnt causing as much heat, which in turn makes more power so 260 hp for the heat exchanger alone.... No this isnt a real figure but i think you get the point....

The same thing with meth injection, if not tuned for it the car will still be alot cooler than a stock blower, in turn making more hp.....

 

Look you take 2 cars with a 2.8' pulley one with a HE and one without. Run both cars down the track and they will run the same. Now if you run 2 runs back to back the HE car will start to shine and maintain a better temp and LOOSE LESS power because of more cooling capacity. There is no agreeing that is just the way it is. I have stated both your guys argument and said the same things that you guys are saying with the exception the HE MAKES horse power. Once again the HE allows the car to maintain the power it already has instead of dropping off do to heat. Agree or disagree it doesn't matter this is the way it is end of discussion.

 

See, that's where you are wrong. I've already proven this point. I personally ran 14.6@96mph without my heat exchanger. I put the heat exchanger on and ran a 14.4@101mph. It was all because of the heat exchanger. There was a stage 2 car at the track with me only trapping 99mph. He couldn't believe I was running faster than him with nothing more than a heat exchanger as far as power mods go. You WILL run faster with just a heat exchanger. It helps MORE than just on back to back runs.

 

And to think...I have no cooling mods....

When I get on my car, you can actually feel the power loss up top from the heat...and see the iat temps rise to 160+ in a matter of seconds lol

My car had a pretty good 1/8 time but when you compare the 1/8 time to my 1/4 time....you can acutally see it isn't as quick as it should be

I think my 1/8 time was like an 8.4 or 8.6 at about 84 mph or somehwere around there...i'll have to look it up

 

if you trapped 108 with no cooling mods, then my god, you'd probably trap 115 with them. that's crazy to even think about.

 

ok so please explain your theory when it comes down to a 2.6 pully?? a 2.6 pullied car will need that heat exchanger to be effective, but sure you can run 60's and a 2.6 but who knows for how long.... Makes sense you make more power and you creat less heat

 

you have proved nothing! I ran a 14.2 bone stock at 2500 feet above sea level and trapped over 100mph. IF THE CAR IS COOL IT WILL MAKE NO DIFFERENCE. We can go back and forth all day long and I can keep saying the same thing. But look at it any way you want you just need to come to the realization that you are wrong and thats it. Do you want me to teach you any thing else about cars?

 

ok lets do this.... You take the 2.6 with 60;s no cooling mods, and ill take the 60's with the 2.6 with cooling mods.... Lets see who makes more power then?? that just proves the point right there

 

The power comes from the pulley the HE allows the car to keep that power and not over heat. Read above and you would see that.

 

well obviously you have never worked on a turbo car.... it is the same thing in this issue....

 

+1

nice stuff none the less ( the axles are one of the fav things on my car) but now you need more go.

the extra traction and limited to no wheel spin with drop that trap speed down.

 

obviously you haven't read my write up that I posted. It's the link in my sig also. The e.t. really has nothing to do with anything so we'll just leave that out. The trap speed is where your power is. I trapped 94mph bone stock. I raised the rev limit and trapped 96mph. Then I added the head exchanger and trapped 101mph. So if the heat exchanger didn't give me the added power to gain 5mph from my previous trap speeds then tell me what did. Cause obviously I must be missing something. I thought for sure since the heat exchanger was the only thing I added, then that was the reason for my increase in trap speeds.

 

shift points, DA, baro, temps, ect.....

its a long ass list of stuff you missed....

 

ok, shift points were the same, DA was the same. Temp was maybe 10 degrees cooler. You trying to tell me that I gained 5mph from nothing then. YEA right. I've been drag racing and modding cars for a long time and I know that I'm not gonna just gain 5mph on 1 great day without changing anything on the car. It was the heat exchanger man. It cooled the engine down by dropping those IAT's and I made more hp which in turn resulted in gaining 5mph. Yes, 5mph means that I gained like 20-30hp from doing that mod. That means that I gained 20-30hp from nothing more than a 100 dollar cobra heat exchanger. Well worth the penny if you ask me.

 

ralli how did your overall ET compare between the 96 and 101 trap runs?