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Roushcharged mustang gt

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Old 08-22-2013, 06:16 PM   #11
Jas5
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Quote:
Originally Posted by 808muscle View Post
No m90 is making 9-10 psi......I wish. 5 psi is normal. Depending on your other mods you should be putting down around 375 ish rwhp if stock. Adding a cai, longtubes, smaller pulley and cams will improve it. All of those of course would need a new tune.
My bad lol.. I guess I was thinking of another roots or whipple style blower

I didn't know the m90 was that tame.. i've seen signatures around these parts with m90 making 450whp.. i'm guessing they upgraded the pulley

If 5 psi m90 makes around 360whp then i should be putting down closer to 400whp.. the paxton is the size of a big diesel pick up truck turbo. My boost guage will only see 6psi at WOT, but not sure if it's been de-tuned, or if a 10 lb pulley = always 10 lbs. I have the stock 10 or 12 lb pulley (450whp). /hijack
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Last edited by Jas5; 08-22-2013 at 06:19 PM.
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Old 08-23-2013, 12:06 AM   #12
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OP, longtube headers, cai and tune will make a big difference in power. You will notice it. When it comes to tuning a FI car dont f*ck around, get a tune from a proper shop. I cannot say enough on how good Brenspeed is at tuning FI cars via an email tune. They nailed my tune on the first try. No cels, no dataloging, no issues at all. My original tune was from another tuner and lets just say lots of cels and other bad flashing lights. Was told my car is around 425 rwhp, adding the smaller pulley would put it at 450.
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Old 08-23-2013, 07:34 AM   #13
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i have m90, 2.57 pulley, jlt cai, shorty headers, cams, dyno tuned and running 419 rwhp
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Old 08-23-2013, 12:38 PM   #14
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Do you have to have different mods for a camshaft ?
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Old 08-23-2013, 01:29 PM   #15
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depending on the cams or stage of the cams you may need a lower rear end gear or torque converter for driveability
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