DLS

When is the stock ic too small then?
i´m aiming for 400hp (in Engine) and wondering if the stock ic is enough

Lightningmcnulty

Are you saying that it cools the charge by holding it in the IC for longer?

does that mean that a larger IC will lower spool time?

Reimu

We have very little knowledge of the fmic benefits on these engines, most of our knowledge is still stuck back in the late 90s-early 00s from god knows where, probably just some random guy who mentioned it once and the opinion spread like wildfire. I think the idea back then was that you don't need one until around 400rwhp or so

I wonder how much the stock ic benefits from just an extraction vent

Scott H

Did the factory 968 Turbos still use the stock 951 IC? Looks like it in pictures.

Lightningmcnulty

Playing devils advocate, I don't think that it matters what porsche did since they weren't intending us to up the power, I would imagine that if porsche created our cars to produce 350hp they would have used a different intercooler?!

Whats your thoughts?

Darwantae951

The 3L 8v 968 turbos were over 300hp.

Lightningmcnulty

Running a bigger/cooler turbo?

nick_968

Firstly I cannot see the point in running a large front mount intercooler without proper ducting as how do you make sure the air goes through it as opposed to round it? One of the reasons the stock intercooler works so well is because it has dedicated airflow from properly sized ducting.

Secondly there is an ideal cross section area i.e. tube area, that the airflow needs to have to move though the core without it becoming too much of a restriction, the size of this window increases the more power you want to run. There is always a trade off as there are packaging restrictions that have an impact on the shape and size of the intercooler.

Lightningmcnulty

It looks like most guys using a fmic are putting them up against the intakes on the front bumper so it should flow through there ok, I guess it would be a good idea to use some sheet aluminum to ensure the air can't bypass the IC

As for the size who knows, I guess unless your a fluid dynamics expert you just have to work off trial and error?!

nick_968

Simply sticking it in front of the grill with only part of the core showing is not going to be ideal, the air will always take the easiest route, ducting entry sizes should be roughly 1/3 the size of the face of the core.

Re flow through the core, there are some fairly basic calculations that will tell you what the cross section of the core should be if you have the relevant information on the type of core etc. It is a very expensive thing to do by guesswork!

Thom

It's all about balancing restrictions.

What other mods do you have?

Dr. Dynamics

are the 24 x11 core size or overall size?

Lightningmcnulty

I have the stuff in my sig right now but Dave from front range fabrication is sending me a modified hx35 and a 3 inch cat bypass.

I also plan to have one of Rogues maf kits soon, within a couple of months and finally I have another engine which Dave frf will be re-working to a 3.2.

What size intercooler do you guys suggest?

Darwantae951

What will the specs be for a 3.2?

The stock intercooler has been adequate for my 3.1L.

Holy **** have you read the waiver you have to sign to buy anything from them?

Lightningmcnulty

I couldnt tell you the exact specs but I want north of 550 hp

Whos waiver?