Intercooler Help

[CA18Fastback]

Hey guys. I am going to be using my MKIV Supra Intercooler to handle the boost on my CA. I have decided to mount the core behind the front bumper. I just have a few questions as to how to do so:

1. How should I make the core fit? Should the bumper and its support be cut to occomodate the core? What can/cant be cut if this is the case?

2. Could someone show some pictures of how their IC pipes are routed? I dont want to have to move the battery, but will if there is no other option.

3. I would like to use 2.5inch piping. Is this too big? What sizes are you guys using?

Sorry for all the questions but I dont know much about where the piping goes. I have a pretty good idea but some pictures would help. Thanks in advance!

~IAN

[Nathan]

It seems to me that any IC piping over the size of the compressor outlet would be overkill, is this true?

[Spectre_240sx]

I don't think so. The air from the compressor outlet is already under boost and much more dense inside the pipe than it is atmospherically. That being the case, I could see piping a little bit larger than the compressor outlet working fairly well.

[Nathan]

Heres another way to think about it though...it leaves the compressor outlet at a very warm temperature...but as it travels it will cool which means that it will take up less and less space (cooler = denser) and it wont require as large a diameter of piping. I could be full of crap, I have no reallife experience with this, just conjecture...I'll just use the tubing that comes in my FMIC kit

[Spectre_240sx]

Ooh, shoot. For some reason I was thinking that we were talking about piping that would come even before the turbo inlet. Your right to say that excess piping size shouldn't be used for the intercooler plumbing. For a 400HP engine, 2.5 inches would be about perfect. What's the goal for this engine?

[CA18Fastback]

the goal for the engine is 275-325whp. i will be using either a GReddy TD06 or a Garrett T3/T04e. The inlet and outlet for the intercooler are 2.5 I believe. I might use a step clamp of some sort if the compressor outlet is diff.

~Ian

[Nathan]

I'd just go with 2.5 then, should be more than sufficient I would think

[CA18Fastback]

ok, that helps with question #3. anyone have any help for my first 2 questions?

Thanks~Ian

[Spectre_240sx]

Well, if he's only going for a max of 325hp, I'd think that 2.5 would be a little bit too big. 2.25 maybe?

[Nathan]

There were other questions? what? oops...I got carried away thinking I was knowledgeable

[1fast200]

Do not use Supra I/C, not effiecient enough for your application!

Look for an Isuzu NPR unit or something similar.

Thanks,RYAN.

[Nathan]

The Supra IC supports 320 from the factory and people regularly turn up the boost on them...from what I've seen from tests its about as efficient as an Isuzu NPR unit Check out: http://home.earthlink.net/~tur....html And yes, I do realize they tested the smaller NPR cooler, I would liek to see how the larger one would work...I was actually going to use one if possible but now I have an HKS FMIC on the way

Edit: I forgot, they actually tested the MKIII unit there, the MKIV is even better.

[CA18Fastback]

Quote »Do not use Supra I/C, not effiecient enough for your application![/quote]

What are you talking about??? The MKIV Supra Core is used by DSMs as an upgrade and has been known to hold over 500whp. The MKIII isnt great, but dont count out the MKIV without doing some research.

Anyways, where do I route the piping exactly? Can someone show some pics of what it looks like from under the bumper, etc?~Ian

[midwestdrifter]

i dont know my friend has a mkIV and he says it sucks. his car is bone stock. he is pretty knowledgable and this is his second mkIV. maybe it is just not effiecent on supras

[Nathan]

Well if you think about it...it might be getting a little inefficient at 320hp, which is what your friends supra should be putting out but thats the top end of what Ian wants to put out. Hence it'll probably work for him providing he has the turbo to support it

[midwestdrifter]

i see but isnt the pressure drop across the ic uniform. i mean independent of hp. if it is running 500hp or 100hp it still has a pressure drop of 3 psi. i could be way off base.