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AWD XT6 Intake Exhaust Pulley Dyno Results


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3 replies to this topic

#1 Myxalplyx

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Posted 04 January 2005 - 12:26 PM

Copied from my post at XT6.net today.

Hey guys,
Just got back from dynoing the AWD XT6. The transmission is on it's way to the tranny gods. It's very weak. I can't describe some of the noises/shakes/shifts that come from that thing. So, I couldn't dyno in AWD. Ever since learning the tranny was weak, I've been dynoing this car in FWD mode (put 10 amp fuse in place in the engine bay). So all dyno runs that have been performed previously and up to now is in FWD mode.
All dynos are from the bottom of first gear and stopped when it shifts out of 3rd. I only show 3rd gear hp/torque results to prevent confusion. I do like knowing what's going on power wise in all gears though.
The dyno plot you'll be looking at is a comparison of 3 different dyno sessions.
The blue line stock dyno run.
The green line is when I had a 2.25" cat back exhaust put on with a 2.25" Dynomax Ultra Flow SS muffler.
The red line is the 2.25" catback with the addition of a JC Sports intake and a ProECM pulley added.

Posted Image

Guys/gals, I simply could not have asked for more, especially since this car is naturally aspirated. Max hp I now have is 123hp vs 113hp with the Dynomax muffler vs 112hp stock. This doesn't tell the whole tale of the tape. As power drops off with the stock setup, there is a fat gain with the intake/exhaust/pulley combo. I picked 5600rpm in the graph to demonstrate the difference in hp. Notice where at 5600rpm I have 120hp while stock I only had 100hp. That's great!

Let's take a look at the torque graph.
Posted Image[/code]
I'm not going to speak about the max torque since the result is a bit skewed. When the car shifts from 2nd gear to 3rd gear, it's right at torque peak and a part of the shift shows up on the beginning of the graph. However, I picked the same point in this graph (5600rpm) as the hp graph to show the gains made. While stock the XT6 only made 93lb-ft of torque at 5600rpm, the intake/exhaust/pulley combo shows 112lb-ft of torque. That's a gain of 19lb-ft of torque. Nice! And it seems that it pretty much tries to keep this gain throughout the powerband.

So there you have it. If you plan on modifying your XT6, a 3" intake tube, a ProECM pulley (2lbs lighter than stock) and a 2.25" exhaust can really work for you as a combo together. Stock hp and torque figures are 145hp/156lb-ft or torque. So theoretically, you can say I'm making approximately 165hp/175lb-ft of torque. Hoooooo! :P

More information on the mods I posted can be found in some of my other posts.
Dynomax muffler vs stock (Pics, Sounds, Dyno)
ProECM Pulley (Weight vs stock, color, etc) Page 3 of thread.
JC Sports Intake (On my other XT6, dyno vs stock, etc)

Any thoughts on this?

#2 Subarutex

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Posted 04 January 2005 - 02:54 PM

You are my hero. Someone that actually take the car, mods it, then goes to the dyno... Awesome.

I bet the XT6 feels good, even for an auto :drunk:

Have good one, can't wait to see results for the RX.

#3 Myxalplyx

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Posted 04 January 2005 - 03:37 PM

You are my hero. Someone that actually take the car, mods it, then goes to the dyno... Awesome.

I bet the XT6 feels good, even for an auto :drunk:

Have good one, can't wait to see results for the RX.


Thanks SubaruTex. The RX is for tomorrow if my darn tire comes in today like it's supposed too. :-\

#4 WJM

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Posted 04 January 2005 - 06:24 PM

My RX is next damnit.




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