1st Gen GP Most liked posts in thread: GP Intercooler wanted

Saw two of these GP intercooler in action yesterday and they were awesome...

Outside temp: 0C
Inside shop temp: 15C
IAT at crusing (on dyno with fan): 22C
At WOT on the dyno: Spiked to 52C IAT
Run-down: back down to 26C (within 4-5 seconds of letting off the gas).

The MD has a automatic wind-down and stop feature after the power run is completed. But before the rollers could wind all the way down and come to a complete stop (takes about 8 seconds), the IAT has recovered from 50+C back down to the 20C range ... Wow, that was impressive!!!

 

Ok, found a source for the GP Intercooler:

1. GP IC ONLY: $405.00
2. OE Cover plate ONLY: $205.00
3. Hardware Kit (4 brackets total): $75.00
4. Shipping: $25.00
5. All pricing is for cash equivalent (Check, MO, Paypal 'Mass Pay' or 'Gift Option'). All other forms of payment (regular Paypal or Credit card), add 3% to the final price.

Lead time for this approximately TWO Weeks from the day of order placement.

Cheers...

 

Great news, good to know. Thanks

 

Correct me if I'm wrong (it happens ), but when you release throttle, doesn't the bypass valve open almost instantly? In which case most of the air the manifold is receiving at that point is bypassing the SC and IC... and isn't being heated/cooled by the IC?

If so, then that's not really an indicator of IC recovery...

Same thing is true at cruising - the approach (temperature over ambient) is due to heating of the air through the intake, intake hose, SC outlet horn and the intake manifold itself... not the SC/IC which are being bypassed.

 

Here's a surprise

the air goes from the post IC side back into the pre-sc side when the bypass is open. The SC doesn't stop pumping, it just works against lower pressure. IT's a bit counter intuitive, but it is true.

On the Mercedes with SCs, they have an SC clutch as well, so then the SC stops pumping, but not the Mini.

Matt

 

Yeah - I knew that the SC was still turning... really having a hard time getting my head around the fluid dynamics of flow around the bypass valve, though. :lol:

Lemme try to figure this out. OK... SC is turning - so it's pumping a similar volume of air through the IC at a given RPM, regardless of the BPV state - yes? When BPV is open, some of that air recirculates back into the intake tract and back through the SC and IC - so I guess technically what's getting to the intake manifold is a blend of air that's been through the SC/IC once, with air that has been through more than once (and bypassed) - yes?

I assume the SC doesn't add much heat when it's not building pressure - yes?

IF all these assumptions are true, then I guess IATs ARE a good indicator of IC recovery - insofar as they show the extent to which the IC is not heating the ambient/recirculated air blend that is flowing through it.

I got in my head that the BPV is letting fresh air bypass the SC -but that's not really what's happening - air is flowing the other way through the BPV (from high pressure to low pressure).

Physics fail on my part.

 

I am not Matt :lol: But yes I think it will. Once you get to the point your at, BV head, Header.....ect...the money spent on an IC is now a good idea. I also have a BVH, header, tune, cam and I just fitted a GP IC to my car and it seems to be doing a better job than the stocker. Mike from Mynes has published results from the GP IC and it always does a good job Here are a couple of pics from my recent install.

 

What is that little extension lip along the front edge?

Also, did you notice a drop in peak boost with the GP IC?

 

mMMm. I love factory parts! Good job finding a source for these Mike!

 

I made that to close up the gap between the stock IC diverter plate and my M7 Ramair scoop. It was a 2" gap and now it is a 1/4" gap.

I didn't notice a drop in boost. I have a mechanical boost gauge and it's kinda tough to see exactly what it's doing, I have seen 16psi on it. I do have a scangauge hooked up, but never have configured the readings on it. Mike might know? Maybe he will chime in?

 

Ok, got it on the lip. Good job in an OEM looking mod.
The GP IC looks awesome, and has always been on my wishlist.

 

the boost setup is easy... but you can also just set the scangauge to "MAP"... then subtract about 14.5 from whatever it tells you...

 

Depending on your elevation..............
Air Pressure and Altitude above Sea Level

Use of the table is a bit easier than the equation, and close enough.

 

Yeah... I was trying to keep it simple for someone who hasn't programmed their Scangauge. :lol:

 

Ok fine, just being a little exacting this morning.

14.5 is close enough!

 

Thanks! Since I live close to Nitromini and have seen his car in person, it has inspired me to try and do extra clean work

 

I may try that, but I think the mechanical guage is good enough. I know everthing is working good, no vac or boost leaks

 

Scangauge will give you more accurate boost/map readings than your mechanical gauge... if'n you really want to know how much you're making. but it's not as much fun as watching the needle move around. :lol: