Thread: Polys: Leave em in or take em out?

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  1. #1 Polys: Leave em in or take em out? 
    GXP Level Member BwolfGT's Avatar
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    I've got poly motor mounts right now, honestly I can't stand the vibration, I've been putting my car in neutral at stoplights because it gets so bad. It's winter right now, so I'm not gunna be doing any off the line racing for awhile anyway, so I'm thinking of swapping the poly's out for the stockers at least for the winter. What are the pros/cons of keeping the polys in anyway? Someone told me to leave em in because it's better for the transmission? Thanks.
    1998 GP GT - Topswap - Ported M90 - N* - 4" FWI - Poly Mounts - 3" DP - 180 Tstat - Alt. Rewire - 3.29 gearing - Full Exhaust - Custom Tune
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  2. #2 Re: Polys: Leave em in or take em out? 
    GT Level Member hourang's Avatar
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    do you just have poly dogbone mounts?
    -Jeff
    98 GTP Black 4dr - fully loaded - short ram intake, tinted tails, hole in resonator.
    sold 98 camaro ss - 6spd fully loaded - cam, intake, exhaust, ford 9in rear 4.11s, 6point chromoly cage, tnt 150shot nitrous, nittos, etc.
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  3. #3 Re: Polys: Leave em in or take em out? 
    GXP Level Member BwolfGT's Avatar
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    Quote Originally Posted by hourang View Post
    do you just have poly dogbone mounts?
    Yeah
    1998 GP GT - Topswap - Ported M90 - N* - 4" FWI - Poly Mounts - 3" DP - 180 Tstat - Alt. Rewire - 3.29 gearing - Full Exhaust - Custom Tune
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  4. #4 Re: Polys: Leave em in or take em out? 
    GT Level Member hourang's Avatar
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    Quote Originally Posted by BwolfGT View Post
    Yeah
    man if its that annoying im gonna stick with stock flipped mounts. gotta scratch poly mounts off my list.
    -Jeff
    98 GTP Black 4dr - fully loaded - short ram intake, tinted tails, hole in resonator.
    sold 98 camaro ss - 6spd fully loaded - cam, intake, exhaust, ford 9in rear 4.11s, 6point chromoly cage, tnt 150shot nitrous, nittos, etc.
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  5. #5 Re: Polys: Leave em in or take em out? 
    GXP Level Member BwolfGT's Avatar
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    Quote Originally Posted by hourang View Post
    man if its that annoying im gonna stick with stock flipped mounts. gotta scratch poly mounts off my list.
    Yeah it vibrates like a mother on idle but its great for off the line.
    1998 GP GT - Topswap - Ported M90 - N* - 4" FWI - Poly Mounts - 3" DP - 180 Tstat - Alt. Rewire - 3.29 gearing - Full Exhaust - Custom Tune
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  6. #6 Re: Polys: Leave em in or take em out? 
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    my friends got poly mounts, his car doesn't vibrate at all...

    * When I get my jack in a bit, I'm going to be changing my lowers to solid, and upper to poly.
    Last edited by KawaFord; 12-31-2009 at 01:50 PM.

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  7. #7 Re: Polys: Leave em in or take em out? 
    The Blue One blueguy's Avatar
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    I had an XP Cam with solid lowers...and I DD'd that car...it was perfect. I say suck it up Virginia.
    Sold WBody's: '03 Blue GTP/'98 Green GTP/'98 Silver GT/'05 GXP
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  8. #8 Re: Polys: Leave em in or take em out? 
    i pay to play badbrad's Avatar
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    guess i'm luck no vibration with poly dogbones.
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  9. #9 Re: Polys: Leave em in or take em out? 
    The Blue One blueguy's Avatar
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    I have poly upper and lower dog bone mounts...with solid motor/transmission mounts...with no balance shaft in this motor...and the cam that is going in...its gonna be fun. If you want spongy, junk mounts...then just put the stockers back in.
    Sold WBody's: '03 Blue GTP/'98 Green GTP/'98 Silver GT/'05 GXP
    '99 Chevrolet Silverado Classic Z71 4x4 - K&N Intake/Gibson Exhaust #TRUCKTHINGS
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    '04 Chevrolet Corvette MRM A4/LS1 - TSP LT's, 3"O/R X, AFE S2 CAI
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  10. #10 Re: Polys: Leave em in or take em out? 
    Banned - Busted For Scamming
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    Agreed. When you are doing skip shifts with lots of power, you want the motor to stay put.
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  11. #11 Re: Polys: Leave em in or take em out? 
    GXP Level Member BwolfGT's Avatar
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    Maybe something else is ****ed up then, cuz mine vibrates like a *****, I'll take a video later if I remember.
    1998 GP GT - Topswap - Ported M90 - N* - 4" FWI - Poly Mounts - 3" DP - 180 Tstat - Alt. Rewire - 3.29 gearing - Full Exhaust - Custom Tune
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  12. #12 Re: Polys: Leave em in or take em out? 
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    if you take them out PM me, i'll pick them up from you.
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  13. #13 Re: Polys: Leave em in or take em out? 
    i pay to play badbrad's Avatar
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    ^^^i was gonna say that but o well hahaha
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  14. #14 Re: Polys: Leave em in or take em out? 
    GTX Level Member Pittman06's Avatar
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    sounds like you have more of a rough idle issue then anything, as even with solids if your engines running right you should have much for vibration. I've had polys in a bunch of cars and its definetly noticable but never annoying. With you just havin poly dogbones there has to be another issue. If you had all poly mounts then its understandable
    F clean cars, I Ride Dirty!.....to hide the wicked body damage...
    97 GP GTP- Mystic Teal, 218k, fixing the damage
    91 Cherokee- 4 in. Lift, 31 Kumho M/T, tons of fun
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  15. #15 Re: Polys: Leave em in or take em out? 
    GXP Level Member BwolfGT's Avatar
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    Yeah. Only thing I can think of right now is my hydraulic engine mount was completely ****ed, like when we took it out it had completely collapsed and it was pissing crap everywhere, and someone told me that driving it around like that for awhile could've ****ed up the poly dogbones?
    1998 GP GT - Topswap - Ported M90 - N* - 4" FWI - Poly Mounts - 3" DP - 180 Tstat - Alt. Rewire - 3.29 gearing - Full Exhaust - Custom Tune
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  16. #16 Re: Polys: Leave em in or take em out? 
    GTX Level Member Pittman06's Avatar
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    i highly doubt that...Polys aren't like a hydraulic, the only way they could really go bad is if you bent the dog bones or the poly was torn or something
    F clean cars, I Ride Dirty!.....to hide the wicked body damage...
    97 GP GTP- Mystic Teal, 218k, fixing the damage
    91 Cherokee- 4 in. Lift, 31 Kumho M/T, tons of fun
    03 Chevy S10- full bag setup on order, will drag frame in under a month
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  17. #17 Re: Polys: Leave em in or take em out? 
    GXP Level Member BwolfGT's Avatar
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    Quote Originally Posted by Pittman06 View Post
    i highly doubt that...Polys aren't like a hydraulic, the only way they could really go bad is if you bent the dog bones or the poly was torn or something
    I know I was saying maybe the engine being so low from driving so long on the collapsed mount maybe screwed up the dogbones?
    1998 GP GT - Topswap - Ported M90 - N* - 4" FWI - Poly Mounts - 3" DP - 180 Tstat - Alt. Rewire - 3.29 gearing - Full Exhaust - Custom Tune
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  18. #18 Re: Polys: Leave em in or take em out? 
    GXP Level Member boostedcompg's Avatar
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    i have a full poly setup, and ive never had a vibration issue. even at idle. seems like most people dont, its just they never post things saying it doesnt vibrate, so you just hear about the ones that do have issues
    04 comp G, front/rear towerbraces, pacesetters, ported sc, LIM, 3.3 pulley, 1.9 mod rockers, Ls1 springs and retainers, custom dyno tune, 180 tstat, shortned dog bones, full poly mounts, zzp shift kit, custom fwi, 28inch cherry bomb, flowmaster 40's. 290whp 380wtq before the button. coldfusion n2o, 60 shot. I haz corvette brakezand gxp cluster! smgpfc028
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  19. #19 Re: Polys: Leave em in or take em out? 
    youtu.be/xhrBDcQq2DM FoSHO99's Avatar
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    So what are you using for lower motor mount? You sure its not your downpipe causing the vibrations?
    2001 GTP PT61 Turbo, E85, Stock Motor
    2011 Chevy Cruze MT6 1.4L Turbo
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  20. #20 Re: Polys: Leave em in or take em out? 
    GXP Level Member BwolfGT's Avatar
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    Quote Originally Posted by FoSHO99 View Post
    So what are you using for lower motor mount? You sure its not your downpipe causing the vibrations?
    Just replaced it with a new replacement hydraulic one from rockautop along with the tranny mount. A downpipe can do that?
    1998 GP GT - Topswap - Ported M90 - N* - 4" FWI - Poly Mounts - 3" DP - 180 Tstat - Alt. Rewire - 3.29 gearing - Full Exhaust - Custom Tune
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