Stage 2 (dual) with added cooling

[JWebb_C7_Comp]

Hey guys,

Another mindless question. I've been considering going to an APR HX to keep my stage 1 SC and air intakes as cool as possible to maximize the benefits of Stage 1 (single) with TCU. If I do that, I'd feel "safer" going to Stage (2) dual pulley.

Any real negatives with that? I like the idea of more torque down low, and I realize I'd loose HP up top, but the trade off seems just fine! Any real maintenance and failure issues with a conservative stage 2 dual with supplemental cooling.

Car has 55K miles. Tuned since first oil change. Recent oil, front diff, rear diff oil and "transfer case" was done last summer. Air filter, cabin filter and plugs all done at about 30k. Brakes all done w/in last year. Tires within last year. Frankly, I'm ahead of schedule on all maintenance given I consider the car's power and occasional abuse as a basis to keep ahead on maintenance.

By way of example, my wifes Q7 was maintained per the book until 80K plus at which point we replaced a waterpump. That's it. That Q is stage 1 and hasn't had any issues whatsoevery. Hence, I'm anticipating a well cared for Stage 2 with cooling will do fine.

What say ye?

[jrubio96]

I had a 490whp CREC that I beat the absolute piss out of, and it was perfectly fine. So long as you maintain the 3.0 properly, worst thing to worry about is shredding belts, water pump, motor mount, pcv (for ctub). Not sure why you want an APR HX, the mercracing is the go to, but any upgraded HX should do fine.

Sent from my SM-G991U1 using Tapatalk

[JWebb_C7_Comp]

APR seems a good piece of kit that burps. But, that said, I give a shit who makes the equipment as long as it fits perfectly and does what is needed. (Cooler SC and Intake Temps).

[WatchMeSpend]

I have the APR. It did audibly burp once. A week ago I was at the track, which was a 2.5 hour drive in hot weather. I wanted to cool the car down more, but was running out of time. The ambient temp was 57F and the charge air cooler temp was 123F at idle. I launched and the temp dipped to 120F and then rose to 149 and then as soon as I lifted it went back to 120F. I need to clip the control wire on the pump and operate a fan in front of the engine in the pits to get the hot juice out of the charger.

Comparatively, when it was 42F outside the charge air cooler temp was 87F and during a hard run, it rose to 107F and after I lifted it rapidly dropped to 78F. If you don't have the control wire clipped, the pump doesn't work until around 2200-2300. If I drive around and build up some cool liquid in the HX and then drive aggressively, shifting between 2700-3700, it has a lot of extra kick.

All logging was done with HPTuners VCM scanner. You can tell when the pump comes on by the charge air temps dropping. IAT temps don't seem to matter much. As long as the car is moving the IATs plummet. Mine was 107F at idle in the lanes and 70F during the 1/4 mile pass with an ambient of 57F.

I hope you appreciate me having to convert from C to F and I hope I didn't F any of it up...