[djwoody]

I'm having a problem deciding which Intercooler to get for my MCS!

Which one would you recommend out of the GRS and the GTT?

Chris

[Paul Webster]

GRS personally at the moment. £396 plus delivery

[BigShow]

I saw a back to back test of a MCS vs GRS on an RR and the temp diff was 10 degrees C in favour of the GRS... GRS all the way IMO.

[Capsaisin]

That's strange, because when Randy Webb tested the GRS intercooler, I believe he found a 10C difference in favour of the GRS compared to the standard S intercooler. More importantly he saw a 10 bhp increase in power with the GRS intercooler over the standard S intercooler.
What were the relative power gains that you saw between the GRS and the GTT intercoolers?

[lucachiarelli]

I have the gtt intercooler and am very happy with the looks and performance it has given me.

[sef]

Any one fancy doing comparison tests? I have a GRS will be willing to run tests with someone that has the GTT... Could prove interesting... Could do a before on each car then swap I/C's over and run again to see what happens...

[sam_a156]

Ouch, I can see another long and colorful thread building up

[Paul Webster]

We can dyno the cars then do some in gear tests as well, recording boost IAT timing etc etc.

I was hoping Roland was going to post one up for evaluation.

[sef]

Excellent... Hope he does... What do you think Roland?? Could be interesting... I volunteer my car as the testbed...

[Fisher]

I am prefering a water to air system even it's more expensive.

[roland2003]

Hi Guys, Ive already done the test (GRS v GTT) already on two different occasions. Once on a GTT220 (ish) spec car and once on my own. On average GTT is about 4 deg C cooler and achieves about 0.5-0.7 psi more boost. GTT is bigger (tube area around 15% more) that is the only reason why. We get extra size by providing a neat alloy plate that moves the coil back to give clearance where the HT leads are. Grahams is fine aswell ,its a bit cheaper as we're vat registered ,mind you outside the EU ours is just £399.
I hadnt intended putting this up ,but as someone mentioned it I've offered the results.
Oh we did some tests on a Forge one too.....you dont want to know how that faired (different car admittadly). We didnt compare to stock but tbf I think both GTT and GRS will outperform stock quite comfortably. I dont think RR's are going to be very reliable for testing ints tbh.
If the boost is up and charge temps are lower you can be almost guaranteed more power on the road. Its not rocket science or GTT badge that explain why it works better its effective area of the core. Both use quality core and both position well for the scoop. I use third gear with 4 or 5 WOT runs from about 3000rpm to 6800rpm watching the peak at end of each run, then taking average of the 5 runs. First run starts with charge air temp near as poss to ambient by driving off the throttle for a bit.
Best Regards Roland GTT

[sef]

Guess that means no then...

[Paul Webster]

You reckon, I thought it was quite a good offer, I'm sure there's someone out there who is willing to help out with the test.

Then we can have a;

pro GTT IC owner V pro GRS IC owner

[sef]

Hope so... Just have to wait and see...

[BRMCooper]

GRS all the way baby

track and RR proven!

[Damo]

G R S

Edit oh yeah....

...I have a copy of Performance Ford sat on my lap. November 2007 issue.

It has the Focus ST Intercooler test on a tuned Focus ST. Now I know the ST is an altogether different beast to the MINI but it quite clearly prooves biggest isn't always best.

The GRS intercooler which was the smallest on test (except for the standard intercooler) came first, largest came last.

Standard = 270.1bhp
GRS = 288.9bhp
Radtec (largest) = 286.6bhp

If Lurchichelli is game (he has GTT) I'm game (GRS) if 1320 want to test both our cars with both coolers.

Edit 2: To add a bit more, there is quite clearly more than simply bigger core = best there is a lot more to the design of the cooler. I know I don't make any denials about being great friends with Graham (but this came after choosing the GRS cooler and I'd put money on someone not being able to find someone who dislikes the man himself), but Graham designs and makes intercoolers for his (2nd) living thats his thing AND his families thing. Now Roland tunes cars in all aspects and doesn't specialise in one area. Who do you go to for an operation, a Surgeon or a GP?

I made my decision for a number of Reasons, and if the GRS turns out worse off than the GTT I'm still not going to regret that decision.

[Edenalig]

Wow, lots of spin and numbers there. I would love to see the outcome of some back to back testing myself. Only way to prove it imo!

[Damo]

Edited again LOL Just to add a bit more clarification about size/manufacturing etc etc

[Loui]

Very happy with my GRS cooler, plus Graham an his service are top notch.

[THEWORKSMINI]

GRS Intercooler would be my choice! Customer service is excelent.