qqwqeqwrqwqtq

We added a D1SC to a customers M6 4th gen. 408ci, 10.25cr, SI6 cam, afr 205's.

At first we had a Precision "825hp" intercooler on it. Only made 7psi boost and 603rwhp with 22deg timing. Hmmm We tested pressure before the intercooler and it buried a 20psi boost gauge.

Come to find out they changed the supplier for this intercooler core and it would appear they no longer perform as they used to. (we've used this intercooler on 900rwhp builds before).

Switching to a Procharger front mount (no other changes) it now touches 15psi at 7k rpm and made 771rwhp with 18deg timing.

Just thought I would share as I found the results amusing for switching just the intercooler.

The Alchemist

iTrader: (19)

WOW. Time to start checking the pressure differential pre and post intercooler. I see you're actually running richer now as well.

qqwqeqwrqwqtq

Fueling difference wasn't a result of the intercooler swap. That's what target air/fuel was but I didn't bother spending the time to get there with the first IC

The Alchemist

iTrader: (19)

Ah, good point. Thanks for the clarification.

THADD

iTrader: (12)

That's why I don't understand all the people wasting their time with CX racing crap. You get what you pay for. I wouldn't even go as low of a level as Treadstone

Forcefed86

iTrader: (4)

Also alot of mis-information going around about the CXracing cores. On the standard universal 31x12x4 with 3" inlets/outlets we saw 3.5psi of back pressure at 20lbs of boost.

I'm sure I could pick up some power with a nicer aftermarket IC. Just not worth it for my application.

My cooler was $125 shipped. For the money spent... it works very well.

SPRAYED 01

iTrader: (22)

I see 25psi at the comp housing and 20 at the intake with by cx 31x12x4

SPRAYED 01

iTrader: (22)

Sounds like that first intercooler was faulty though, even a cheapo isnt that bad. The one was broken for sure.
Just noticed who posted this, you know by intercooler very well Jim.

THADD

iTrader: (12)

Yes it also depends on what your doing with the car, but if you are class racing you cant afford to give up anything

qqwqeqwrqwqtq

We tried 2 of the Precisions with the same results. That intercooler is no longer sufficient for 800+hp.

stevieturbo

Very interesting results, and very shocking too !

SPRAYED 01

iTrader: (22)

Wow, crazy. So procharger IC it is this winter.
Did I measure the loss on the procharger ic?, is it 5psi?

stevieturbo

Any pictures of both units ?

ie external core design and internal passages

Hank Peabody

iTrader: (2)

Our cars and intercoolers are twins!

AutomagicLS1

iTrader: (18)

that's crazy. I'm finally ditching my cx racing cooler for a fancy shearer a/a this winter. Curious how much it'll pick up. I'll be on a much bigger air compressor though

turbocuda

Looks like corky is going to be eating steak dinners!......

So you want to line up against my cxracing cooler in the big ol 4dr 5th avenue......whenever we both get ready....want to put some money down?

http://www.ebay.com/itm/CXRacing-Universal-27-x16-5-x3-5-Twin-Turbo-Intercooler-2-5-Inlet-3-outlet-/140700128763?pt=Motors_Car_Truck_Parts_Accessories&hash=item20c26195fb&vxp=mtr
though definetly appeared the precision turbo intercooler had problems...that is a huge restriction.....

yenkomike

iTrader: (2)

anyone ever try running one of these engines with no intercooler?when I was testing with my gn every pound of boost created about 10 degrees of heat so if your loosing 5#boost threw the core it has to drop iat temps 50 degrees just to cover the heat ti was responsible for in the first place. just a thought. what about a couple meth nozzles instead.and not give up the restriction in the first place.

qqwqeqwrqwqtq

Not sure how much improvement it would be over your current intercooler but I think it would be fine at your power level (and it would help to get some generously radius'd bends on there instead of how tight it is now).

I didn't measure the current pressure drop or take any comparison pictures.

THADD

iTrader: (12)

Yeah we can do that, better yet let's run for that parachute you have that's not being used

Old Geezer

iTrader: (3)

Would be interesting to cut it open...May find a rice bowl covering the outlet pipe...