Change motion delete plates
5/23/07, 01:53 PM
#2
Team Mustang Source Legacy Member
I have no dyno numbers myself, but Doug at Bamachips recently did dyno runs before and after the install and his tunes, and got a nice gain for them. They can be had for anywhere from $130+ to $400 for a pair. The cheaper ones are cast, the more expensive are billet.
Within the stock CMCV plates are butterfly valves in each intake runner that the computer controls to cause incoming air to speed up and tumble a bit, apparently to increase torque at lower RPMs. The delete plates do not have these butterfly valves at all, so the air flows through unrestricted, and the aftermarket tunes remove the motor that controls them from the equation.
Here's the thread Doug started with his results.
http://forums.bradbarnett.net/showthread.php?t=64232
It took me right at 60 minutes to do the install and retune the car, and I haven't had any problems yet, and although with the torq tune I think I might have lost a little low end torque, it definitely kicks behind above 3000 RPM. I'll be putting the race tune on later, and that's what I was using before I did the install.
Within the stock CMCV plates are butterfly valves in each intake runner that the computer controls to cause incoming air to speed up and tumble a bit, apparently to increase torque at lower RPMs. The delete plates do not have these butterfly valves at all, so the air flows through unrestricted, and the aftermarket tunes remove the motor that controls them from the equation.
Here's the thread Doug started with his results.
http://forums.bradbarnett.net/showthread.php?t=64232
It took me right at 60 minutes to do the install and retune the car, and I haven't had any problems yet, and although with the torq tune I think I might have lost a little low end torque, it definitely kicks behind above 3000 RPM. I'll be putting the race tune on later, and that's what I was using before I did the install.
5/23/07, 03:14 PM
#5
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http://www.2005stang.com/gallery/alb...CMCVdelete.pdf
5/23/07, 03:15 PM
#6
Ask and you shall receive. ... http://www.2005stang.com/gallery/alb...CMCVdelete.pdf
5/23/07, 05:53 PM
#8
5/23/07, 06:13 PM
#9
Mach 1 Member
Thread Starter
it does sound like people are getting good gains but at higher rpms. losing the low end torque may not be a good thing for me i live in vancouver canada, and there is'nt that many places to open it up that much. low end torque therefore is good to feel the power when im just going through small streets
5/23/07, 06:28 PM
#10
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This business of the removal of the charge motion control valves causing a loss in low speed torque is complete baloney. Look at how many other cars don't have them at all and none have low speed torque issues because they don't have them.
I installed some CMCV delete plates a few weeks ago and I did not loose ANY low end torque at all.
I tested this by taking some base line numbers by leaving the trans in 3rd gear and flooring it from 1500 rpm to 4500 rpm.
I did this before and after and actually found a slight decrease in the time.
I felt that by starting at such a low rpm would effectively demonstrate any loss of low rpm torque. Being that that the time improved slightly I think this, at least in my mind debunks the theory of CMCV deletes causing a loss in low speed torque.
If you get the Steeda economy ones they are a cost effective easy way to gain some top end power with no loss in driveability.
I can't speak for what it might to too emissions but I suspect it would be neglegible.
They are also very easy to install.
The ONLY downside was getting a tune that worked with them.
I have tried two different providers for this and even Doug's tune was giving me problems but I know he will make it right as his tuning skills are excelent.
I think I am just having some bad luck here.
At any rate I would not hesistate to get the CMCV deletes.
They are an easy and inexpensive mod.
I installed some CMCV delete plates a few weeks ago and I did not loose ANY low end torque at all.
I tested this by taking some base line numbers by leaving the trans in 3rd gear and flooring it from 1500 rpm to 4500 rpm.
I did this before and after and actually found a slight decrease in the time.
I felt that by starting at such a low rpm would effectively demonstrate any loss of low rpm torque. Being that that the time improved slightly I think this, at least in my mind debunks the theory of CMCV deletes causing a loss in low speed torque.
If you get the Steeda economy ones they are a cost effective easy way to gain some top end power with no loss in driveability.
I can't speak for what it might to too emissions but I suspect it would be neglegible.
They are also very easy to install.
The ONLY downside was getting a tune that worked with them.
I have tried two different providers for this and even Doug's tune was giving me problems but I know he will make it right as his tuning skills are excelent.
I think I am just having some bad luck here.
At any rate I would not hesistate to get the CMCV deletes.
They are an easy and inexpensive mod.
5/23/07, 07:55 PM
#11
5/24/07, 06:27 AM
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I've got a set to put on this weekend too (after the LT headers are on). I'll let Bill and the other write ups do all the explaining.
And just to clear up, the Steeda economy plates aren't necessarily stock plates w/ the shaft and butterflies removed, but stock castings that were never machined for the shaft. There is a fella on MF that will take stock plates, remove the butterfly valves and shaft, and fill the holes with some kind of epoxy or something.
And just to clear up, the Steeda economy plates aren't necessarily stock plates w/ the shaft and butterflies removed, but stock castings that were never machined for the shaft. There is a fella on MF that will take stock plates, remove the butterfly valves and shaft, and fill the holes with some kind of epoxy or something.
5/24/07, 10:33 AM
#16
Team Mustang Source Legacy Member
For $140 I just bought new plates, I don't like to heavily modify anything (like plugging the holes on the factory plates) in case I ever want to go back to stock.
Either way you're going to need a new tune, so just figure that as part of the cost and budget accordingly.
Either way you're going to need a new tune, so just figure that as part of the cost and budget accordingly.
