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roush m90 to paxton novi 2200 is complete here are the results

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Old 01-05-2012, 07:19 PM   #1
esp3500
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Default roush m90 to paxton novi 2200 is complete here are the results

I took off my roush m90 with the 8 psi pulley and installed a paxton 2200 novi with the stock 10 psi pulley over Christmas.
Nothing else on the car was changed and the car was ran on the same dyno ( mustang dyno ) with the same guys tuning both superchargers and here is what I found.

First of course is the HP TQ. These are weather corrected numbers so it is truely apples to apples.

Roush m90 382.6 Hp @ 6201 rpm.............339.6 TQ @ 4688 rpm

Paxton.......440.6 HP @ 6194 rpm............380.6 TQ @ 5289 rpm

The paxton actually made more power across the board at all rpm above 2800 and very close from idle to 2800 rpm.

The roush felt a better burst at 2000rpm,
but only because it throws all 8 psi at that point so you get a cool surge, but that is just seat of the pants feel ,,
the dyno says there is no more power than the paxton.

The roush Got 16 to 17 mpg
The paxton has got me back to what it was stock 19 to 20 MPG

The paxton is quieter, but I did like the roush sound.

The Paxton is great because I control the boost I want by throttle and rpm, so if you do any road course track days the paxton is a much better choice.

Now for the Bad points of the paxton.

Roush looks much neater under the hood. ( you can change your belt without taking apart the SC) Paxton looks like a plumber's nightmare.

I think the Roush sounds better ( OMHO )

The roush instructions were MUCH better than the paxtons were.

The roush installed in one long day for me, the paxton 2 very long days.

the guys who tune the car both times were suprised the paxton did so much better, and my wife loves driving it again because it is so smoooooth now.

well there you have it.

As for me and my car???????
Well what can I say?
$2500 plus shipping and you can have my m90 complete.
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Last edited by esp3500; 01-05-2012 at 07:46 PM.
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Old 01-05-2012, 08:45 PM   #2
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Thanks for the impressions!

Mmmm how many miles on that M90? And any idea what differences there are for an 06 and an 08 car?
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Old 01-06-2012, 01:44 AM   #3
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The centri's make a great amount of power

lol@ a plumbers nightmare...

I didn't like the vacuum hose set up either, with the dual bypass valves and other hoses rofl

but it works so it's all good!
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Old 01-06-2012, 02:07 PM   #4
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Thanks for the write up.. you're making some good power. Does 60 more hp and 40 more tq feel like very much? Small difference?
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Old 01-06-2012, 09:06 PM   #5
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Night and day difference
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Old 01-07-2012, 08:23 PM   #6
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Quote:
Originally Posted by Jas5 View Post
Thanks for the write up.. you're making some good power. Does 60 more hp and 40 more tq feel like very much? Small difference?
Very noticable. The car just keeps pulling harder right to the rev limiter.

Next up is some Forged internals so I can turn it up
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Old 01-07-2012, 09:10 PM   #7
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awesome
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Old 01-07-2012, 10:06 PM   #8
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Impressive.... Good write up... taking trades on blower?
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Old 01-08-2012, 12:49 PM   #9
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Quote:
Originally Posted by esp3500 View Post
Very noticable. The car just keeps pulling harder right to the rev limiter.

Next up is some Forged internals so I can turn it up
Okay just curious what size and compound tire you run

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Old 01-08-2012, 12:51 PM   #10
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Sorry - Yokohama advans
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Old 01-08-2012, 05:07 PM   #11
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Quote:
Originally Posted by Jas5 View Post
Sorry - Yokohama advans
nitto 555r My 60 ft times suck because I have not upgraded the clutch yet.
But I just sold the roush so I am going to order the forged rotating assy and the 8 bolt flywheel and clutch assy.

My wife is going to be sooooo mad when tear this car down again in a week or so.
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Old 01-08-2012, 05:09 PM   #12
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Quote:
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Sorry - Yokohama advans
are you still stock 3.55 gear?
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Old 01-09-2012, 12:09 AM   #13
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What were your ETs with the m90? Any other mods with it and what tune were you running?
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Old 01-09-2012, 04:00 PM   #14
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Again, how many miles on that m90? I'm not sure how many things I would have to change for a 2010 but it sure wouldn't add up to $2,500.
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Old 01-09-2012, 05:37 PM   #15
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Quote:
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What were your ETs with the m90? Any other mods with it and what tune were you running?
It ws running !/8 mile 8.3's, Not great but I shift grandma style to keep from tearing anything up also.
60 ft was 2.0's with the stock 3.55 gear
The tune was custom from the local tuner ( High speed Performance) no other mods, ran 8.8's stock

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Old 01-09-2012, 05:38 PM   #16
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Quote:
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Again, how many miles on that m90? I'm not sure how many things I would have to change for a 2010 but it sure wouldn't add up to $2,500.
Nope, it wouldn't work on a 2010, and I sold it today ,But thanks.

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Old 01-09-2012, 05:53 PM   #17
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I would like to see an actual comparison of the HP/TQ curves. Not so much for the peak numbers but to actually compare the shape of the curves. In theory, the m90 should produce a broad, flat torque curve while the centri should climb to a peak linearly with rpm. Your comparison is not quite apples to apples because you went from an 8psi pulley to a 10psi pulley, but like I said, the shape of the curves is what I'm interested in more than the numbers themselves. The fact that your TQ peak is 600rpm higher with the centri supports this.

All in all, it looks like it was a good upgrade for you. More power and better effieciency. Was either setup intercooled?
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Old 01-10-2012, 07:30 AM   #18
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^^^this...can you post the dyno results?
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Old 01-10-2012, 05:50 PM   #19
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Quote:
Originally Posted by breathegood View Post
I would like to see an actual comparison of the HP/TQ curves. Not so much for the peak numbers but to actually compare the shape of the curves. In theory, the m90 should produce a broad, flat torque curve while the centri should climb to a peak linearly with rpm. Your comparison is not quite apples to apples because you went from an 8psi pulley to a 10psi pulley, but like I said, the shape of the curves is what I'm interested in more than the numbers themselves. The fact that your TQ peak is 600rpm higher with the centri supports this.

All in all, it looks like it was a good upgrade for you. More power and better effieciency. Was either setup intercooled?
Both setups are intercooled, and you are correct it is not exactly apples for apples, because the paxton never actually hit 10psi because I left the rev limit at 6k rpm so the roush had a big advantage because full boost is at 2k.

Your theory is the reason I first bought the roush, but in practice it just didn't hold water, as I said the paxton made almost as much in the low end and more at the high end.
One possible reason is the fact that it takes so much hp to make that boost so low of an rpm on the roush that they cancel each other out.

You speak of the peak being 600 rpm higher, but look at the rpm that the paxton makes the Roush's Peak Thats what matters. the paxton made the roush's peak hp 500 rpm sooner than the roush and the paxton made the roush peak Torque 1000 rpm sooner than the Roush.

I am copying the dyno sheets now. you will notice the paxton sheet looks a little choppy, but if you look at the sheet they had the buffer set at 50% where as they had it at 99% for the roush because it was choppy also.

Now can anyone tell me how to post these sheets. I have them copied now?

Last edited by esp3500; 01-10-2012 at 06:22 PM.
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Old 01-10-2012, 06:43 PM   #20
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Old 01-10-2012, 06:43 PM
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