off topic, but is your turbo specs and did you have any lag with the rear mount?

 

Nonnieselman, wastegate is vented to atmosphere. I may or may not route it back into exhaust. I also love the spool whistle of a borg warner turbo, I may do a BW turbo upgrade in the future.

Silverado ss, I first had a sts turbo with a 60-1 turbo. Then I swaped it with the 72 magnum (still rear mount). I know tech and pt preaches larger turbos but I really had a lot of fun with the 60-1. It spooled a lot quicker than the 72, but the 72 would pull higher into the rpm range.

Thats why I went front mount, to get that quick spool back!! Now I just need a retune.

 

Better go back into the exhaust with the wg dump. Or make its own exhaust system like Nonnie did. I dumped mine to atmosphere and couldn't hear anything else. I will be routing mine back in to the regular exhaust shortly.

 

what A/R did you have with the 72 and was it p trim or q? where was you seeing full boost at?

 

I have a .81a/r on a p-trim, ball bearing. I would see full boost 8-9psi @ 3500+ rpm through a fmic and wastegate boost referenced at intake manifold. The 60-1 was also a .81 a/r, trim? Hence the quicker spool. You know what though, you may be fine because I also have 4:10 gears on a heavy crew cab.

 

what size engine do you have?

 

2005 5.3l.
Mods:
Magnum t72 prim ball bearing .81 a/r 8-9psi
Fmic
Trick hot pipes 3" dp
Doug's 3" cutout
3.5" magnaflow muffler
Isky triple 12 cam
Nelson mail order tune (no know tuners in Hawaii, my best option)
Never been dynoed, rwhp/rwtq???

 

you should be around the 500rwhp mark

 

Thanks man, that's great to know! Those were kind of my rwhp goals. Only thing is I still only have a 4l60e with a shift kit and stock converter behind those horses.

Also I got to give props to Nelson Perf. for all my retunes. They have been great to me.

S ss, how's your rear mount build going?

 

I had the same experience. I had the ball bearing gt67 rear mount. With cats, loved the sound of the turbo. Then I gutted the cats, the engine was louder, but lost a lot of turbo sound. Never got that sound back, still miss it