RT vs SRT HP Drive train loss???

[BlueSunshine]

I went to the dyno and have an 06 RT with R&T, AFE Stage II CAI, 180* T-Stat, Magnaflow exhaust and got 298 rwhp and 328rwtq. Yet the SRT dynoed at 393rwhp and 393 rwtq and was bone stock except for a BT Catch can. So, I guess my real question is: Are the RT's(350hp) really losing this much power in the drive train compared to the SRT(425hp) Drive train?

Sorry, the SRT has a gutted air box with K&N drop in and both have Predatorsof course.

[mikel]

Nope, they loe about the same, its just that the SRT is making that much more power...

[BlueSunshine]

So the RT loses about 15% and the SRT only loses about 6% in the drive train?

[mikel]

Huh, no, is that how my post came out?

They use basically the same trans, and lose roughly the same % of power, but it seems like you are assuming that the factory power ratings are correct, well, the SRT8 is a bit underrated, based on the power it makes to the wheels.

Thanks

[BlueSunshine]

Assuming that then the SRT is underated by roughly 35 hp.

Remember I am learning this and the only way to find out is to ask the stupid questions.

What are the #'s you guys are running for rwhp on the RT's, with roughly the same mods as me?

[SRT8Tech]

The SRT's also have a better gear. (3.06)

[BlueSunshine]

Hey SRT8Tech, check this out:

TB Daytona....323rwhp...370rwtqe..Mopar CAI,Headers,Cat-bac.predator CMR tune
Inferno Red SRT8..355rwhp...365rwtque.....Bone Stock

That should make you feel real good!

[SRT8Tech]

370 rwtq on a 5.7 is freaking kick ass!!!!! My SRT ran a 370rwhp and 370rwtq stock.

[Mike_Levy]

My 300 SRT ran 370/366 stock. Wish I could dyno the GC. It feels alot weaker, even with the 3.73 gears. Only weighs about 500lbs more too.

[SRT8Tech]

Ive noticed that the GC's pull harder in 1'st and 2'nd gear then kinda fall off a bit in 3'rd compared to the LX cars.

[BlueSunshine]

Aren't the GC's AWD?? or is that an option?

[SRT8Tech]

Aren't the GC's AWD?? or is that an option?

Yep, there all AWD. First gear launches from a stop in the GC SRT's are killer.

[Mike_Levy]

Yeah, they launch HARD. Just did a 0-60 log. 0 mph was at 2:36.591sec, by 2.39.142, she was through 1st gear and at 36mph, she hit 5900rpm in second as she hit 60mph, at 2.41.837. Not a great run at 5.2695 seconds, but TCS was on, and there is 7.5° ST KR and 5.5° LT KR, so its acceptable.

I'm also not sure why its shifting so early. It shifted the 1-2 at 6100rpm, which is about 300rpm sooner then my CSRT8 did. Peak power hits at 6400, so its not even getting to the 6.1s peak. No option to raise the shift points either.

[Quick]

GCs are geared differently (rears) right?
The LX SRTs lose about 17% to the drive train.

[Mike_Levy]

LX SRTs have 3.06 rear gears in a Mercedes 215. GC SRTs have 3.73 in a Dana 44.