75 shot and not a bit more is reliable. Also with stockish timing. My car popped on about a 75 shot and GM stage maps, maybe a little more. Just a cracked piston, nothing serious, but still blown. Drivable, but blown.

And I know why it happened, in most situations it would have been fine. Spun then hooked, and that was it. Gotta love real tires on the street.

 

He is not talking about after multiple runs, m-dub is talking about cruising at 80mph on the highway on a 90 degree day, he gets 108 iat2's which is very normal.

With the stock gm stage 2 tune and no cooling mods my temps are generally 15-20 degrees above my iat1. We will see what they drop down to with the dual pass and meth on thursday.

I am really really tempted to get a 50 shot of nitrous just for the hell of it....although I don't know if it would be pushing the stock stuff to hard or not with the mods in my sig....What internals would you guys recommend I buy if I want to run a 50 shot?

 

my IAT2s with no cooling mods on stage 2 were about 20 above the IATs.

 

yeah, back at cruise speed the outside air cools everything down. Gotta go by the temps at a given point, I do a full pull from a stop or 10-20mph, to the middle of 4th, around 130mph. I was seeing 160's when it was right, 220s when the pump was dead. No meth, just the H/E and Dual-Pass, on a 2.8, and those were the temps right at the end of the pull, as I let off the gas. It goes back down really quick, thats why I like to see logs, look at boost, rpms, speeds, it all makes a difference.

FWIW: When my pump was shot, if I shifted at 6200 rpms instead of 7200, temps would not exceed 160. ******* 60 degree difference just by not running the last 1000 rpms.

You'd be fine on a 50, would be a lot like my car was at the start, but you actually have more exhaust work done, so you'd be better off. See the link in my sig for how my car was against a regular stage 2 car.

 

fluidyne

 

got a link to a vendor that sells one?

 

cxracing. go to ottperformance.com

 

I was talking about to the fluidyne heat exchanger that pjk91 was referring to.

 

dude once again, you don't listen well at all..... I said it was after some WOT runs making sure everything was peachy with the 60's we just put in....

But once again, back to your bickering and what not!

 

Yea, but it was DIRECTLY after a WOT run was it? If so, thats simply amazing. I misunderstood you because you said you were cruising at 80mph. If you did a full wot run and then had 108 for an iat2, grats. I was just going off of what you said mate, relax.

 

Thats why I ask for logs, people interpret things differently, the only way I can compare someone else to what I have, is to look at both myself.

 

1st off i was saying i read on this site that porting could help reduce iats...i did not say i know if this is so or not..the reason i made the comment was for others to comment on if its true or not...ill try and find the post in here but i remember when this was said no body disagreed so i assumed it to be accurate

 

so what rough numbers would i be looking at with those mods i first posted, a 2.6-2.7, 60's, new header back exhaust, and a good dyno tune?

 

i would push for 275-300 mate.

 

CXRacing is NOT poor quality. That H/E is BIG and it is BLINGING! It looks better than A LOT of other after market heat exchangers on the market, and it's one of the biggest!

 

What were the IAT2's at the top of the gear when you were still at WOT? I think thats what they are asking. I know my car cools quickly when I let off the gas.

Very true, I'm quite pleased with my CX Racing exchanger. Its a very good quality unit.

 

Highest my car ever went with my shopws heat exchanger after a wide open run to about 130 was about 120 IAT2, it is possible if its set up correctly, then they dropped extremely quickly. Cruising the temps stayed only about 7-9 degrees higher then the iat1 temp

this was on an 85-90 or so degree day

Do you mean let off the gas and go to neutral or leave the clutch in or do you just mean let off the gas. Because if you just let off the gas and the engine is doing the braking with your clutch engaged your temps do not go down, they will go up. Just want to make sure what your saying

 

WOT means wide open throttle. AKA the pedal to the metal. He is curious, as am I now, to see what your IAT2s are when you are wide open from 1st, to 2nd, to the end of 3rd if possible. Let us know what your IAT1 and IAT2s are.

I am going to do some runs today and get some logs of my temps and then tomorrow the meth and dual pass will be put on. Then I will redo the logs and see whats up. The logs will be hand written down so nothing perfect, as I don't think I am going to buy hptuners.

None the less, there will be a drop, and I will let you know how much of one there is.

 

just like i said on a WOT run to 130 my temps never exceeded what I said above your last post. Ofcourse if I were to do multiple back to back runs they would increase slightly. I cant exactly go out and log right now wither since the dealer owns my car. Plus I stopped making the H/E for the cobalt so that wouldnt do you any good either. Just letting you know that the H/E I was building was very efficient

 

Thats great. What other cooling mods did you have, meth, dual pass w option b or JUST the heat exchanger?

 

had just the heat exchanger, we did testing on the cobra, cxracing and a dual pass setup and the dual pass did the least.

let me clarify, the stock heat exchanger stayed on too, fluid into the stock exchanger then into mine, used them in series

 

hptuners is a great cooling mod. turn on your fans and turn on your intercooler pump keeps things cool and cools things down faster... just to get back on track

 

I will have to do some runs and see what mine is, however I hate going up to 130 on the streets and currently I won't see that at the track. Blah.

I will do 1 pull from a roll to the end of 3rd and see what the iat1 and iat2s are and letcha guys know, then when the dual pass end plate is put on i will do the same and see if there is a difference, then once the meth is installed i will do the same and see how big of a drop there is =D.

Worse case scenario i will just do 1 stock run so to speak, and 1 run with the meth and dual pass, it all depends on how much time my shop has tomorrow to do stuff. I want to get some dyno runs in too lol.

 

yeah i dont suggest doing 130 on the streets, i was in the back country in the late afternoon when we did our testing

 

I live in the middle of nowhere but still wont do 130 on the streets. However I know of a place where I can get up to 130 and see what the temps are.