whats going on guys? i have a 04 qc/rb 4x2 k&n fipk and magnaflow. just wanted to get some input. how would a stock hemi take an sts turbo? i know no one makes a tune for it yet. piggy back or stand alone are more of a option for tuning. i just want to know if yall think the stock motor will hold some boost.
(the other day i went to get a price on a superchips and the guy suggested a new bully dog programer. it is for gas burners as anyone seen one or had one on their truck if so are they worth it. i know the superchips works great and has more options.)

 

Stock motor will be fine as long as your not overdoing it on the boost. I don't know much about hemi's but I'd assume they'd be safe up to and around 8-10psi.

 

Ronnie at the Speedshop is putting a paxton kit on a SRT challenger this week, I would wait and see how that thing works. Get Nonnie to take a look at it for you. It is a really complete kit with a piggy back, injectors all of the brackets and such. I think it will make about 7 lbs when done.

 

The rings on the pistons sit high up creating a weak link. More then 6psi and you risk the piston coming apart. But under that and you should be ok. Turbo's also seem to be a bit better on the trannies over big N/A power or NoS hemi's as the power builds.

 

The stock engine will take 500-550 hp. This is when the pistons break up and usually the clutches in the tranny. I haven't heard of a single lower engine failure other than dampeners exploding from over-revving. At sea-level I would limit it to 7psi, at my altitude of 3500' I run around 8.5psi. It is important that you don't get too greedy with the AFR or the pistons with go for sure. I keep it fat with a 11.5 AFR and also use water/meth injection to keep my EGT below 1400*F.

 

I agree wtih FrostKing, I always recommend 7psi as a safe highpoint and 8psi if you're wanting to get a little on the risky side. I ran mine at 8.5 psi for 2 years w/o issues. After I installed a 6.1 cam and KRC heads on top of 9psi, I snapped a rod in half.

The smt6 with 8 large injectors and 2 bar map sensor is a really nice setup and gives you a safe tune. I also run meth. I stay on the rich side as well with about 11.2 a/f.

 

I don't think they make the SRT Challenger yet so I will assume it must be a Charger SRT-8. If they are using the paxton then it is probably a GSM kit so be very leary of the aux injector setup they use as they have had numerous engine failures because the back two cylinders run leaner than the others.

The trucks run a lower cr(9.6) than the SRT-8's so they can handle a little more boost. Some have run 10lbs safely but be prepared to build the engine if it blows. A safer bet would be 8psi as others have stated and that is with meth and/or i/c.