So i have a 57/62 borgwarner sxe and i absolutely love it some day down the road I wanted to do compunds. Guess that day came because a guy at work has done talked me into buying his s476 sxe. In my brain this looks like a nice tight towing compound set up but I'm worried about pushing the limits of the transmission and the head. Transmission has a 2 year old re build with a billet single disc torque converter and a shift kit with 150 psi of line pressure and DPP transmission fluid ( actually pretty solid stuff and cheaper then atf) head bolts are the s2000 equilivent head studs. What i cannot find is a clear answer on if my truck will hold together with this combo and what kind of power it would make. I can't find any dyno results for the sxe turbos in a compound set up . I called DAP and they were great said I would lose the input shaft on the 47re before anything. Called DPP and they seamed like they really wanted to sell me a o ring head. What's yalls experience? Am I asking for trouble?

Could the quadzilla be used to limit power?

I’ve been running a pretty similar setup for about 2 years now, S357/S475. I have studs and my transmission was built to handle 650hp, I opted for the billet input. Also have a billet single disc low stall converter. The Quadzilla never lets my boost get too high on my daily and tow tunes, usually keeps it under 30psi. Honestly I don’t like letting it get any higher than 40 which my party tune would do if I got crazy. My main concern is my original head gasket with 265k miles, even with the studs. I usually drive like an old lady anyhow. I would think as long as you aren’t beating on it that it would hold together ok.

Edited April 11Apr 11 by Sycostang67

Well that is good and bad to hear. Good as in it's doable and bad as in now I don't have an excuse not to lol. How did compounds change your driving? Did your power band shift any lower or just expand up? Did your mpgs change much?

Quadzilla can limit power in different methods of tuning. Amount of advancement and when could limit boost pressure and drive pressures. Fuel map can limit directly but most just make linear ramp which is wrong. There is more than just dumping fuel or cutting fuel there are limits.

That's a interesting idea of using timing to keep the boost down. All i figured was setting the max boost defuel to a safe number and calling it good.

Unfortunately my truck decided I shouldn't get it. It chose yesterday to have something go out. Not not sure what yet but something was causing it to cut out hard randomly. Today's adventure will be to track down that issue.

Error codes?

Remember the engine requires compression and fuel for good power. Injectors could be spraying poorly, or possibly valve lash affecting compression?

Only 1 code but it's a doozie. P1689. I'll do some reading up on it

Well I think it's safe to say that problem is fixed had a relay going out! thank you moparman. That pesky turbo is still haunting my marketplace feed and I just got a set of 7x.011 injectors and some 3 in pipe so I guess this still might be happening! Typically I'm guessing the exhaust manifold is flipped upside down for better clearance?

Do I need to move the oil filter? I'd hate to make changing that a pain.

Does the hot pipe need to be cast/heavy wall pipe? What i have is schedule 10.

Did i go to big on the injectors?

Thanks for reading i look forward to your replies!

Sadly I've never done twins yet. 7x0.010 injectors can be ran on a stock turbo if you have Quadzilla tuner. Beast is my 30+ MPG truck.

Man I love the quadzilla. The fact you can do that is amazing. I sat down and had a long hard think about it and I think I'll stick with a single for now. I dont trust my transmission that much for twins or the factory heads I'd rather save my time and money and mess with water methanol and air to water intercooling.