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Old 07-11-2006, 11:29 AM   #1
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Default intercooler too big...what happens

What would happen if say someone got an intercooler that was 31x3x11 or 12 and threw it on a 260-300hp honda. Would it be that bad of an idea?? curious on everyones input. I know bigger is not always better and that there would probably be some boost lag. what does everyone think??
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Old 07-11-2006, 11:40 AM   #2
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Default Re: intercooler too big...what happens (D-meet07)

Larger intercoolers lead to pressure drop. Shouldn't affect power #'s too much though.
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Old 07-11-2006, 05:50 PM   #3
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Default Re: intercooler too big...what happens (HybridKOOP)

my friend had a stock gsx with the stock t25 turbo, and bought a huge slowboy racing front mount, and it was too big for his turbo and blew his turbo.....but thats a dinky *** turbo
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Old 07-11-2006, 06:00 PM   #4
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Default Re: intercooler too big...what happens (97turboteg)

Quote:
Originally Posted by 97turboteg
my friend had a stock gsx with the stock t25 turbo, and bought a huge slowboy racing front mount, and it was too big for his turbo and blew his turbo.....but thats a dinky *** turbo
i dont believe that
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Old 07-11-2006, 06:20 PM   #5
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Default Re: intercooler too big...what happens (komat)

Thats the funniest bullsh!t ive heard today. haha...
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Old 07-11-2006, 06:29 PM   #6
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Default Re: intercooler too big...what happens (sohc_turd)

Just about everybody with a DSM blows up their T-25.
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Old 07-11-2006, 06:42 PM   #7
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Default

too big may result in a slower spoolup time, but I would say go for it. bigger the better Click the image to open in full size.
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Old 07-11-2006, 06:44 PM   #8
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Default Re: (dunkd)

Quote:
Originally Posted by dunkd
bigger the better Click the image to open in full size.
to a certain limit
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Old 07-11-2006, 06:45 PM   #9
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Default Re: (dunkd)

you can never go to big Click the image to open in full size.
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Old 07-11-2006, 06:45 PM   #10
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Default

31x3x11 isnt that HUGE, ive seen much bigger. it will be fine.
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Old 07-11-2006, 07:37 PM   #11
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Default Re: intercooler too big...what happens (HybridKOOP)

Quote:
Originally Posted by HybridKOOP
Larger intercoolers lead to pressure drop.
Nope, they lead to less pressure drop, for a given flow. Think about it. And, how the expletive is your build going?? I should have noticed it if you bumped your thread recently... hit the PMs if you've anything interesting to say.

Quote:
Originally Posted by dunkd
too big may result in a slower spoolup time, but I would say go for it. bigger the better
I went from a non-IC setup and .48 turbine to a 24X11X4" FMIC and a .63 turbine at the same time... my FMIC had about the same volume as a 31X12X3" core... the whole shebang took 500 rpms longer to spool.

Oh, the horror. Click the image to open in full size.
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Old 07-12-2006, 02:03 PM   #12
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Default Re: intercooler too big...what happens (Joseph Davis)

see i noticed something similar when i modified my 1st intercooler. I went from a modded side mount to a 28x7x3 and it felt slow as ****. Then I got use to it. I went ahead and bought a 28x2.75x9. Thats a little bigger than my last one as far as the height goes. But I would think that if an intercooler is rated at lets say 600hp and your only making 270-280 then it would be sluggish?? correct me if im wrong. Intercoolers are like a turbo with an engine setup. To big would result in not so good performance.
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Old 07-12-2006, 07:39 PM   #13
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Default Re: intercooler too big...what happens (D-meet07)

That's what some people say, but I went from 2500 to 3000 rpm spool, and the car ripped.

You are the first person I've ever heard who upgraded intercoolers and felt a decrease in performance... not trying to explain you away or anything, but small holes in the charge piping can cause you to spool and hit boost fine, but the compressor is spinning all to hell to make the pressure with the leak and is out of it's efficiency range.

What's your experience with spool when you upgraded?
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Old 07-13-2006, 08:56 AM   #14
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Default Re: intercooler too big...what happens (Joseph Davis)

It felt sluggish but I never returned back to my side mount. the bigger intercooler definetly gave me more hp but it felt sluggish at first. I got use to it in about a day or so.
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Old 07-13-2006, 09:10 AM   #15
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Default Re: intercooler too big...what happens (D-meet07)

Can you define sluggish in terms of rpm?
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Old 07-13-2006, 09:11 AM   #16
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Default

This is a myth....in the case of Fluid dynamics. If you want to fill a known space...I.E. a cylinder, you will have to deal with the conduction of the lines. So if the lines are too conductive in nature, you either double the line diameter or shorten the legnth. Now obviously we are not working with super low Delta T's but we would like rapid spool. So if you can increase the size of the intercooler and piping...within reason, you should see a slight increase in performance. Not to mention, the cooler the air in going into the engine the better. Proof in point, I just installed my new Precision 750HP IC replacing the old one.. from 29X8.25X2.75 to 24X10.25X3 core size and did not change anything else. The car feels a bit more responsive. But the IAT's have dropped by 18degrees on average.
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Old 07-13-2006, 09:20 AM   #17
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Default Re: intercooler too big...what happens (D-meet07)

well intercooler size shouldnt affect much. I dont have a very big intercooler on my car with 400hp pulls both sides of the intercooler stay cool. its about 22 tall 25 wide and 3 thick. all depends on the effeciency of the turbo as to how big of an intercooler your going to need and also how effeciently the intercooler is cooling the air charge coming into it. the other day makign pulls on the highway it was about 85 degress and very humid i didnt see over 95 intake temps

It might be split seconds of spooling difference but i dont think noticable at all with the butt dyno and larger should cool the charge better and show minor HP gains with cooler intake charge
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Old 07-14-2006, 03:03 PM   #18
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Default Re: intercooler too big...what happens (Turbo-LS)

I dont know if there was a diffrence in rpms but bottom line get a fmic over a side mount. I dont regret getting one. never upgraded to something taller and bigger so I cant speak from that aspect.
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