Roush M90 interesting mod

[Fish05]

While it's true Nitrous would cool the intake charge, it will also make for an even hotter combustion process. Nitrous goes in cold, but it's an accelerant. Don't think of nitrous as a suplement to meth, it's strictly a power adder when injected into the motor, and should be treated as such. Either way, it'll make for an excellent pick-me-up in torque/hp.

Meth is like anything else, when used correctly produces the results it was intended for. Meth is fuel enrichment, not a power adder. Lower IAT's are a secondary benefit to using meth. Some people try to tune WOT basing it off added Methanol, which you can get away with so long as those variables never change. A car *should* be tuned without meth, and then meth added after the finalized tune, jetting accordingly. I can say as an eye witness that meth on the M90's boost level is kind of a waste. Not quite enough boost to justify it, unless you're trying to be very aggressive with spark timing. Again, if it's jetted properly, and you have a decent meth kit, and don't tune your car to rely on it, meth is good shit!

Is it possible just to tune the car so that the only benifit is teh lower IAT and not utilize the fuel aspect? Granted the m90 does not produce a huge amount of boost but it does build heat like any typical TS or roots. I am very happy with the M90 but when at track it loses about .2 to.3 just from being hot.

 

[jcw06]

You can tell that the valve is failing because at an idle the arm for the bypass cycles from open to close, sometimes when you jump on the throttle the car will not build boost even though the blower is spinning under load and I am down about 2 psi of boost from the 8 1/4 I was at right after the pulley swap to just over 6 psi now

 

[Mustang30212]

You can tell that the valve is failing because at an idle the arm for the bypass cycles from open to close, sometimes when you jump on the throttle the car will not build boost even though the blower is spinning under load and I am down about 2 psi of boost from the 8 1/4 I was at right after the pulley swap to just over 6 psi now

Are you talking about the externally mounted bypass valve actuator or the one that's part of the headunit iteslf?

RH

 

[702GT]

Is it possible just to tune the car so that the only benifit is teh lower IAT and not utilize the fuel aspect? Granted the m90 does not produce a huge amount of boost but it does build heat like any typical TS or roots. I am very happy with the M90 but when at track it loses about .2 to.3 just from being hot.

The fuel will always be enriched while meth is present. To what degree depends on how you jet it. If you really want lower IAT's I'd focus more on H/E upgrades. Playing with meth or nitrous just to drop .2-.3 off your E/T is a costly endeavor. Throw ice in the tank, run the pump, and a cloth bag of ice in the M90 between runs. If you hotlap the Eatons they will hest soak and then timing gets pulled.

 

[mosaleen]

First mod you need to look at mosaleen,s roush system to stop belt slip.
IHave lots of Roush owners running it and say its one of best mods to date..

 

[702GT]

Usually if you're running a decent tensioner the M90 doesnt slip. I am at a bit of a loss though, if you're adding tension to the belt you're really adding travel to the belt, or "stretching" the belt so it's tighter no? Why would you need a shorter belt? Any pics of this idler system on a M90 setup?

 

[skwerl]

The Roush tensioner works perfect with the M90. Been running mine for a year with over 100 track passes and no belt slip. No need to fix something that isn't broken or redesign the wheel.

 

[Fish05]

I have been running the stock tensionor with a smaller pulley and have not noticed any belt slippage.

 

[Captainstr8edge]

I have been running the stock tensionor with a smaller pulley and have not noticed any belt slippage.

Same here.

 

[Mustang30212]

I upgraded mine to the Roush tensioner. I didn't need to, but I felt that with the 2.57 snout pulley and the 10% OD crank pulley I might as well.

RH

 

[Fish05]

I upgraded mine to the Roush tensioner. I didn't need to, but I felt that with the 2.57 snout pulley and the 10% OD crank pulley I might as well.

RH

What is your HP level?

 

[Mustang30212]

what is your hp level?

440/410

rh

 

[detn8tor]

So what was the outcome of your dyno results?

 

[Pentalab]

Roush has done something different on the 2010 M90. The 05-09 M90's all have that distinct whine. There is NO whine on my 2010 M90. Now that's with the oem 73mm pulley. Boost ends up at just a hair below 6 psi. Intake tube on the 2010 M90 is on the passenger side, is short..and straight. The casing on the 2010 M90 looks more like a TVS style casing.

Other mods were the FRPP twin 62mm TB, 7 bar grille, K+N filter, JBA LT's, and high flow catted H, FRPP frs-500 mufflers.

The M122 in the GT-500's doesn't whine either.

 

[Dubstep Shep]

The M122 in the GT-500's doesn't whine either.

Uhhhhh no. Maybe you should listen to my car sometime.

 

[justinsstang]

Roush has done something different on the 2010 M90. The 05-09 M90's all have that distinct whine. There is NO whine on my 2010 M90. Now that's with the oem 73mm pulley. Boost ends up at just a hair below 6 psi. Intake tube on the 2010 M90 is on the passenger side, is short..and straight. The casing on the 2010 M90 looks more like a TVS style casing.

Other mods were the FRPP twin 62mm TB, 7 bar grille, K+N filter, JBA LT's, and high flow catted H, FRPP frs-500 mufflers.

The M122 in the GT-500's doesn't whine either.

Pretty sure all M90s whine on the 2.57 and especially the 2.49 pulley.

 

[Captainstr8edge]

Roush has done something different on the 2010 M90. The 05-09 M90's all have that distinct whine. There is NO whine on my 2010 M90. Now that's with the oem 73mm pulley. Boost ends up at just a hair below 6 psi. Intake tube on the 2010 M90 is on the passenger side, is short..and straight. The casing on the 2010 M90 looks more like a TVS style casing.

Other mods were the FRPP twin 62mm TB, 7 bar grille, K+N filter, JBA LT's, and high flow catted H, FRPP frs-500 mufflers.

The M122 in the GT-500's doesn't whine either.

the K&N a drop in? an open filter will be MUCH louder. I noticed a bigger difference going to the open filter than I did dropping a pulley size. You will also only hear it at WOT.

 

[Pentalab]

the K&N a drop in? an open filter will be MUCH louder. I noticed a bigger difference going to the open filter than I did dropping a pulley size. You will also only hear it at WOT.

The CAI box on the roush 05-09 cars leaves a lot to be desired.

The CAI box on the 2010 M90 flows 800 cfm with the oem Ford paper filter....and 980 cfm with the K+N drop in panel filter. ( The 2011+ coyote CAI box's flow a little less... 745 cfm with paper filter..and 909 cfm with the K+N drop in panel filter. )

At my power levels, there is nothing to be gained by using a cone style open filter.

Yes, I can see how a open cone filter would be a helluva lot louder.
I wish I could hear the whine...but it's barely perceptable @ 6 krpm.
The new VMP-TVS-1900 blower head is still in it's box. On 05-09 cars, the new 1900 blower also requires a new cone style cai. The 2010 cars can still use the oem cai box.... but a cone style cai can be installed if preferred.

 

[Captainstr8edge]

If you want the sound your going to have to switch to a cone filter. I noticed a massive difference when switching out mine.

 

[detn8tor]

I haven't been able to find a cone style CAI to fit my 2010 JLt and others have said they don't make one...