buying an Intercooler

[Raptor]

That is why I ask the question, People with different performance goals are going to have different thresholds where they believe the effect is worth the cost and effort. One thing I can do is find the formulas to give estimates on horsepower based on temperature drop. I will get them and post it. That info should be useful to have for other reasons.

[Goat Blower]

I've already got SS piping. I'll probably use some of my upper IC piping and stick with SS for my new setup this winter, although if I was starting from scratch, I still think I'd switch to aluminum unless there was a measurable difference, on the order of 5 horserpower or more on my setup. It would probably take a decent difference in intake temp to lose that horsepower.

[Anduinlight]

Alright,
All of you guys have been very helpful with all your information, I think that SS might be the way for me. I don't think I will be going into th 9s anytime soon (at least not with this car) Just looking for somthing that can support me in the upwards or 500+ hp. Like i said earlier in the post I might be going up to maybe a 50-56 trim for a turbo later, so somthing that will support that.
I think that I will call QPR to see about their prices for IC and piping and maybe a couple of others
Thank you all for the advise
If anyone else has any more info, feel free to post :D

[Raptor]

You can call or come down anytime you like, there are a lot of options as far as pricing and what we can do. Just make sure you ask for Mike.

[Raptor]

Well after digging and questioning a bunch of auto engineers, I can't find a better equasion to determine the benefit of reduced intake charge exactly. The old standby of 1% power increase for every reduction of 10 degrees was confirmed by several engineers for me at least for a N/A application they said if anything it was a bit conservative. We actually stand to benefit more from it from a standpoint of being able to run more boost with less knock so the gains should be a bit higher than 1%. I am still harrassing them for more info and getting their viewpoints on the piping, I will post that info when it is all settled.

[Enes]

Don't you think if it is 1% @ 1 bar that at 2bar it would be more like 2% or even 3% .. and at 3bar it would go higher than 3%...

If he was talking about NA which is going to be non compressed, less dense.. that if you drop the temp of denser air by 10degrees it would make bigger difference than non compressed air.

-E

[Kracka]

I am thinking that intake temp may effect a boosted car less than an N/A car if you go on a straight degree-by-degree basis since the intake temps are already so much higher. My personal opinion is that it should be looked at as such: A X% drop/rise in intake temp will yield a gain/loss of Y% hp.

[Raptor]

It will definately have a larger effect on higher boost levels, how much is hard to figure exactly. Some vary carefull testing will need to be done to get accurate info. The truely telling tests will have to wait till spring at the trac since that is where the performance gains are desired and under those conditions. I am bugging the engineering groups into telling me their opinions on the effect in our situation considering the speed of the charge etc as well. By the time this is done, we should all be a little smarter.

[Shane@DBPerformance]

Don't you think if it is 1% @ 1 bar that at 2bar it would be more like 2% or even 3% .. and at 3bar it would go higher than 3%...



Since it is already a percent, I don't think it is going to drasticly rise with more boost. It might go up or down some, but I don't think it is going to double or triple. I don't see big HP changes on the dyno when my intake air temps are 10 degrees higher, not anything like a 3%(20whp) change at 3 bar absolute if the temp is 10 degrees different. I would like to try some drastic cooling of the intercooler with nitrous or CO2, but it would be hard to get 100% factual results with the CO2 or nitrous contaminating the surround intake air. I guess, if you can get a big HP gain with CO2 then you know it's working, since sucking in CO2 should kill HP. Jason Siebels, the guy who designed the Pro-EFI and AEM EMS standalone doesn't even run an air intake temp sensor on his turbo MKIV Supra. He thinks it is not nearly as important on a turbo car compared to an NA car. I don't know why.

[Goat Blower]

If I remember right, Corky Bell's turbo book has the formula in it for boosted applications. I don't have it here in front of me, but that's probably a better place to start than all of our guesses.