Griffin FMIC (20x10x3) on RRE's site

[XtReMeToYz]

Thats the intercooler im running on my car. Ive searched high and low, and emailed RRE but never got a response. Im just curious as to some spec's on this thing, and what its capable of. I dont know if this is something that will hgold up to my future plans, or if it is something I should just sell. FYI, Im shooting for a 11-12 sec street (pump gas) car next summer off of a GT-13. I just dont know any specifications on this core..If this is in the wrong section, my bad someone move/delete it. Thanks.

 

[pneumo]

RRE has a tendency to delete any emails if the answer can be found on their website. Maybe that's what happened to your email?

Here's some specific info about your core: www.RoadRaceEngineering.com/eclipsetech/icflowcharts.htm
Your core should be good enough to get into the 11's. Doing it on pump gas might be tough tho. What octane do you get in your area?

 

[XtReMeToYz]

RRE has a tendency to delete any emails if the answer can be found on their website. Maybe that's what happened to your email?

Here's some specific info about your core: www.RoadRaceEngineering.com/eclipsetech/icflowcharts.htm
Your core should be good enough to get into the 11's. Doing it on pump gas might be tough tho. What octane do you get in your area?

We get 93, and that info I dont really understand. Is their anyway you can explain it to me? Their wasnt a flow chart, and the size data doesnt mean much to me??Sorry if this seems stupid, I just dont know much about intercoolers.

 

[pneumo]

The first flow chart is the one for your IC. It's kinda confusing since it shows pressure drop on the right hand scale, but it doesn't show how much charge air is going through the core. It only shows how much outside air is going through the core.

The scale on the left side is slightly less confusing. Just replace the word 'effectiveness' with 'efficiency'. Efficiency (or effectiveness) is a measure of how well the IC cools the air coming out of the turbo. 100% efficiency means the IC has cooled the air to the same temp as the outside air. On the flow chart you can see the efficiency goes from a little more than 87% at slow air speeds, up to 92.5% at the high end. The scale on the bottom shows how fast the outside air has to go through the core to get those efficiency numbers. Here's how it converts.

1000 ft/min = 11.36 MPH
1300 ft/min = 14.77 MPH.
1600ft/min = 18 MPH

Looking at the flowchart it shows over 92% efficiency at 18 MPH. Sounds pretty good, eh? Just wait, it gets a little more complicated. Those speeds are not the speed of your car, rather it's the speed of the air going through the core. This means if you put the core against a wall the airspeed will be zero, and efficiency goes down the toilet. OTOH, if the IC is mounted on a pole sticking out in front of the car with massive ducting all around it the airspeed through the core might get close to the cars speed. Reality usually falls somewhere in between. There is a radiator behind the IC which slows the cooling airspeed, and the ducting around the IC isn't always perfect either.

To make the best use of this, or any core, make sure there is good ducting around it to push more air through the core. A manual switch to turn on the radiator and AC fans will also pull more air through the core, increasing it's efficiency.

I wish there was someway to see pressure drop over charge air flow rate. That would be a good way to see how much HP this core could reasonably support. All the reports I've read show the core is good for about 375 HP. YMMV