Now this may be a dumb question, as I am mechanically inclined but am not totally knowledgeable in the area of intercoolers/turbo's. In theory would it be possible on the WRX/STI to run double intercoolers, as in one at the original top mount location, and a front mount? I know that Audi runs double intercoolers on some of there cars like the S4 and RS6. If this is possible on a WRX/STI would it be beneficial to the car? And what sort of custom work would need to be done to make this happen? Just thought I would throw that out there and see if anyone here had any thoughts on it.

 

This is fully supposition on my part, but I don't think it would be beneficial until you start pushing a lot of power through the car. On a stock setup, you see minimal returns from an upgraded intercooler.

But, if you had a bigger turbo (or say twin sequential turbos), it may be beneficial.

 

Wouldn't the additional piping involved with multiple intercoolers significantly increase spool time?

 

unless you had some kind of crazy intercooler vtec where it switched over to the front mount at high speed/full boost

 

I guess i forgot to mention the fact that this would not be used on a stock set up but on higher HP setups. and I don't see how you would have longer spool up time especially if you had an upgradded turbo, most new turbos are very quick to spool up fast.

 

I went hunting around - I guess it's more of a throttle response issue and lower boost at lower RPM. Pretty much everything I found indicated that there is additional lag resulting from a FMIC, though I couldn't find any real data as to why.

 

The reason for more 'lag' (actually, technically, it raises your turbo threshold) it because there is more piping.

With an FMIC you have to physically move more air through the pipes, and it will just plain take longer to pressurize the whole system. But, that can be significantly reduced with fast spooling turbos.

 

Cool, I thought this to be the case, but I didn't want to misinform