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Upgrading Roush blower.

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Old 11-08-2017, 01:16 PM
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Toast Bunny
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Default Upgrading Roush blower.

I have a stock 07 Stage 3 Roush. 23k miles.
I was looking into the pulley upgrade, comes with 80mm pulley, belt, dual fuel pump upgrade, and re-calibration.
Its $1,500. Should get an extra 75hp.
Any other suggestions that might be more worth it?
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Old 11-08-2017, 02:39 PM
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proeagles
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I wouldn't because the upgrade would void the warranty if I'm not mistaken. Roush provides warranty coverage on the lower hp version but doesn't provide it on the supersize version which tells me the engine may not live very long under greater pressure.
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Old 11-09-2017, 11:49 AM
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Toast Bunny
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I'm confused, I don't think Roush is going to cover a car from 2007 and The kit is from Roush and not after market.

People are running 600hp + on stock internals and this would only bring me about 12 psi of boost. 490 HP doesn't sound like a lot to ask out of this engine.
Unless there is something I'm overlooking?
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Old 11-09-2017, 01:49 PM
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proeagles
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They are not, my point is Roush originally covered the lower HP version but not the higher HP version. I know because I put on on my 2007 Shelby which was rated at 475 or something like that.

Last edited by proeagles; 11-09-2017 at 02:17 PM.
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Old 11-09-2017, 02:16 PM
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Toast Bunny
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I got you, thanks.
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Old 11-09-2017, 09:45 PM
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Toast Bunny
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Called Roush, they actually don't make an upgrade for the m90 blower.
They sent me over to Bren Speed. They sell an upgrade kit and their own custom tune and only $800
Really impressed on how well they know the blowers and engines in such detail. They said with confidence
that even with the pulley upgrade they sell its way under what that engine can handle.
Ill see how the upgrade goes in the spring.
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