I tried using the search option but didn't find enough info on this:

Why is it that a bigger intercooler can be the cause to loss of power?

Between the regular intercooler and the larger one which one do you think would be a better option for a stock LS with a Greddy Turbo kit. Keep in mind that no major horsepower gains are in plans, but do want to raise to 8-9 lbs boost in the near future. I was told that it would be better to get the larger one if planning on raising boost, but I also heard that the turbo can't produce enough flow to fill in the big intercoolers.

Any thoughts/suggestions would be appreciated.

 

whatever 'regular' one you have should be fine for your greddy kit at 8 psi

 

I don't think a large intercooler would actually cause a decrease in power... maybe it would slow the spool up time because it has more volume to fill up with air before pressure can be made.

I could be wrong though.

Just find an intercooler that suits your horsepower goals and has good flow characteristics. Don't buy a huge freakin 600+hp intercooler for a 300hp setup and you will be fine.

 

Overly large intercoolers can be blamed for some "pressure loss" and it can hinder your numbers a bit.

Typically this is more common in overly thick coolers, and coolers with very poor design characteristics.

Lots of people believe the bigger the better on the intercooler - but overkill is exactly that. . . overkill.

Get the flow specs of the intercooler you are looking at. . . if they aren't published, you don't want it.

Find a good mate for your turbo by comparing the CFM of your turbo to the CFM your cooler supports. You'll want a little room, but not too much.

 

I see, Greddy offers two intercoolers the 24V and 31V which aren't that differently priced. I don't know what CFM is, does anybody have any comments on their intercoolers or ones they know about for me? thanks.

 

For how much power the gredy potential has even at 17PSI a small intercooler will be just fine. You will just loose spool time with a bigger intercooler and your heat (IAT) will not drop that much. CFM=cubic feet per minute its a measure of volume of air, you hear this because different turbos produce different CFM