GRS or GTT??

[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@1320]

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@1320]

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@1320]

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!