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Test drove an EVO, vibrations when idling

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Old Jan 15, 2016 | 01:24 PM
  #16  
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Originally Posted by letsgetthisdone
No, stoich idle with plenty timing my car is brupbrupbrupbrupbrupbrup. S2's have a rough idle. You can set idle in open loop to idle in the mid 13's for AFR, but then your idle isn't as consistent.


OP, the car is likely vibrating due to the GSC S2's, and deleted balance shafts, and it's probably fine.
Thanks! Do you think the Fluidampr dampers could help/negate some of the vibration?
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Old Jan 15, 2016 | 01:48 PM
  #17  
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Not really.
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Old Jan 15, 2016 | 01:49 PM
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Originally Posted by letsgetthisdone
Not really.
Well... damn.

I'm getting the sense from people to just deal with it. But other ideas would be nice. I'll have a chat with my tuner to see if there is anything he can do. I'm paying him a visit anyways for a retune.
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Old Jan 15, 2016 | 02:12 PM
  #19  
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You could switch to smaller cams since you are not going spin the stroker very high RPM. HKS 264 or 272 will be very smooth and makes Tons of TQ down low. This is the main reason I still have those S2 cams sitting in my garage and the HKS-272 are purring away in my 2.3L.
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Old Jan 15, 2016 | 03:35 PM
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Not much you really going to be able to do, because your not going to pull the engine down hey and your mate ain't going to sell you a dud hey, seeing that your new to the car just go over all the usual checks and go out and have fun and don't be scared to take her out on the track, you might be surprised how much you enjoy opening up that big 2.3, they ain't meant to be show car cruising up the boulevard waving at the chicks
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Old Jan 15, 2016 | 04:09 PM
  #21  
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Originally Posted by Jonno99
Not much you really going to be able to do, because your not going to pull the engine down hey and your mate ain't going to sell you a dud hey, seeing that your new to the car just go over all the usual checks and go out and have fun and don't be scared to take her out on the track, you might be surprised how much you enjoy opening up that big 2.3, they ain't meant to be show car cruising up the boulevard waving at the chicks
True, cant take the engine now and balance it. Thank you for all your replies.
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Old Jan 15, 2016 | 05:54 PM
  #22  
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Reliability wise my 2.3 has been great. I would definitely say check the motor mounts. Most people with solid mounts complain of steering wheel vibrations.
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Old Jan 15, 2016 | 06:24 PM
  #23  
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Originally Posted by Turndown
Reliability wise my 2.3 has been great. I would definitely say check the motor mounts. Most people with solid mounts complain of steering wheel vibrations.
Would a OEM motor mount help in this case or which mounts should I get?

The car does have side mounts. I assume it would help to have it removed?

Last edited by youra6; Jan 15, 2016 at 07:00 PM.
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Old Jan 15, 2016 | 07:19 PM
  #24  
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My vote is solid motor mounts and until you check them we can't rule it out. My friend had all solid motor mounts in his evo x and that thing shook hard at idle.

Last edited by evo.matt; Jan 15, 2016 at 07:30 PM.
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Old Jan 15, 2016 | 08:08 PM
  #25  
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Originally Posted by youra6
Would a OEM motor mount help in this case or which mounts should I get?

The car does have side mounts. I assume it would help to have it removed?
Yes the oem motor mounts are pretty soft and don't really vibrate at all. With the cams you may still feel a little but not enough to make the steering wheel vibrate like you're describing.
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Old Jan 15, 2016 | 09:29 PM
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You guys are awesome thanks for the help.
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Old Jan 16, 2016 | 02:54 AM
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I think leave it and when your mates get in the car and feel that vibration tell them the motor is so powerful it's trying to shake the whole car to pieces like a nitro dragster lol
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Old Jan 16, 2016 | 06:52 AM
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Originally Posted by youra6
You guys are awesome thanks for the help.
That's what we're here for
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Old Jan 16, 2016 | 09:45 AM
  #29  
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Originally Posted by Jonno99
I think leave it and when your mates get in the car and feel that vibration tell them the motor is so powerful it's trying to shake the whole car to pieces like a nitro dragster lol
Ha, I have different goals for the car. It only makes about 400-430whp on E85 so its not putting down an absurd amount of power.

Anyways went over and took a look at the car again. It actually looks look the side mounts are stock. It has the letter "M" lazily written on the top left side mount and I think that is a stocker.

I'm betting its the driveshaft delete at this point. The 272 cams shouldn't make it idle that harshly.
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Old Jan 17, 2016 | 09:32 AM
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Driveshaft delete? lol Are all the mounts stock? I have stock mounts except the front motor mount (replaced with a Blox mount) and have no noticeable vibrations like you are describing.
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