So after installing an air/air intercooled powerdyne kit on a buddy's mustang, we take it out for a street tune. Went WOT got no freaking boost. ZERO! No belt slippage. We thought the powerdyne was toast (he bought it used), but if you bypass the intercooler completely, it makes 4 psi in neutral just revving to about 3-4k. The kit is a 9psi kit, they come non-intercooled, but seeing this motor is iron headed and 10:1, the intercooler was a good idea. How is this happening?? The intercooler is a pretty big dual-pass air/air, and was bought brand new from a reputable guy. It was not cheap. I guess we need to pressure test it, but i cant see losing 9 psi through a little hole (there are no visible holes). Could it just be too big? The car should make somewhere in the 450hp range, so there is a awful lot of air the runs through it. The clamps are all t-bolts, and good couplers, with a blow-through MAF before the cooler.
Any thoughts would be great, we are stumped on were the pressure is going.





Modified by wilham320 at 10:46 AM 5/24/2007

 

Mustangs have an internal bypass in the ecu control panel that vents any pressure in the intake.

Come on man, you know what to do...pressure test that pig. It's not rooooocket science.


Modified by AlligatorMan at 1:07 PM 5/24/2007

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AlligatorMan &raquo;</TD></TR><TR><TD CLASS="quote">Mustangs have an internal bypass in the ecu control panel that vents any pressure in the intake.

Come on man, you know what to do...pressure test that pig. It's not rooooocket science.</TD></TR></TABLE>


hahah, i had to read that twice

 

i dont get it, the joke i mean.

I say blown coupler for the probleme.

Pressure test FTW!!!

 

FWIW, a "dual pass" style intercooler like that flows like crap because it's essentially a 6" tall 4' long intercooler now. They will have quite a bit of pressure drop like that. Not to a point of no boost, but it definitely won't make the 9psi that it would make w/o the ic.

I tested a garrett core setup like that, at 300whp and 15psi, we were seeing 3psi drop across the core. That's only at 300hp, and a better core than the one you've got there.

I also did a back to back with what looks like the same brand as that one, from ebay, on a turbo EP hatch. Went from that to a full race PWR vertical flow ic from their RSX kit. The car picked up 55hp in the 450hp range.

So, that being said, you should still get boost. Pressure check everything, fix it, then save up for a better intercooler.

 

well pressure testing showed the intercooler with no leaks. one coupler at the maf had a very small leak. the vast majority of air was leaking out the case and input shaft of the super itself. time for rebuild.....