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Forum namePerformance/Engine
Topic subjectES Poly motor mounts installed!!!!
Topic URLhttps://forums.2gnt.com/dcboard.php?az=show_topic&forum=i5&topic_id=50462
50462, ES Poly motor mounts installed!!!!
Posted by SILVERNT, May-04-03 07:21 PM
just put them in today with the help of Michael97RS, and Babybeclipse. front went in in less than 15min. the rear, haha, i lost count of time after 1-2hrs. i honestly dont see why some people cant stand the shaking, its barely noticable(only with air off, lol). i kinda like the shaking, makes it feel like drivin a musclecar, lol. good investment for anyone who hates wheelhop!!
you were right mike, those burritos do kick ass, if my stomach didnt hurt so much from taking those 2 shots of hot salsa, id want another!
50464, RE: ES Poly motor mounts installed!!!!
Posted by babybeclipse, May-04-03 07:29 PM
hahaha, none of us got hurt so it wasn't officialy a project! lol
50469, RE: ES Poly motor mounts installed!!!!
Posted by GhEttOrAiD, May-04-03 11:34 PM
Good luck. I've had a few problems since throwing mine on... Donwpipe cracking has been the biggest problem. I'm going to have to get a flex section welded in so it stops happening... :eek:
50476, RE: ES Poly motor mounts installed!!!!
Posted by Michael_97RS, May-05-03 07:25 AM
If anthing the motor mount inserts delayed your cracking of the down pipe the motor moves less. Which puts less stress on the DP. The motor rotates back and forth with a flex section the way out exhaust is run you are bound to crack the DP, it's ony a mater of time.



15.9 @ 86.7mph

Injen CAI, 55mm TB, P&P Intake, Crower Cams, Hooker Header, ERT/Catco Cat, GS-T Muffler, AFX UDP, Crane Ign Amp, S-AFC
50478, RE: ES Poly motor mounts installed!!!!
Posted by Kirby, May-05-03 07:31 AM
So your saying the DP would acctually crack sooner with a flex section installed? Could you explain that in a little more detail for me?
50481, RE: ES Poly motor mounts installed!!!!
Posted by Michael_97RS, May-05-03 07:44 AM
No, I'm saying with stock mounts without a flex section the DP is more likely to crack because the stock mounts allow the motor to torque more. with the insertsin the motor will torque less, putting less stress on the down pipe.

bottom line flex section = good!



15.9 @ 86.7mph

Injen CAI, 55mm TB, P&P Intake, Crower Cams, Hooker Header, ERT/Catco Cat, GS-T Muffler, AFX UDP, Crane Ign Amp, S-AFC
50503, RE: ES Poly motor mounts installed!!!!
Posted by Chamuko, May-05-03 12:54 PM
not to just barge in but does anyone know what the flex section size we would use for the STAR dp. Where did you get yours?
50525, RE: ES Poly motor mounts installed!!!!
Posted by GhEttOrAiD, May-05-03 07:02 PM
Yeah I dunno what else to think... One shop said that it was because the downpipe was not torqued down correctly.


>not to just barge in but does anyone know what the flex
>section size we would use for the STAR dp. Where did you get
>yours?

Seconded!



50527, RE: ES Poly motor mounts installed!!!!
Posted by GhEttOrAiD, May-05-03 07:35 PM
>No, I'm saying with stock mounts without a flex section the
>DP is more likely to crack because the stock mounts allow the
>motor to torque more. with the insertsin the motor will torque
>less, putting less stress on the down pipe.
>
>bottom line flex section = good!
>


By my logic though.... less vibration is transferred into the mount bushings themselves... all that energy has nowhere else to go BUT on the dp...
50549, RE: ES Poly motor mounts installed!!!!
Posted by Michael_97RS, May-06-03 05:46 AM
I don't see vibration as a major culprit here, but the flex and stress put on the DP by the engine rotating back and forth. The rotating back and forth is trasfered through the exhaust and tries to rotate the entire exhaust as the engine moves. With the highest stress being present closest to the engine, the downpipe. The back of the exhaust is anchored many times from the cat to the muffler, holding it fairly still, so again the front manifold and downpipe see the stress. I think the vibration plays a minimal part.

For flex section, I suggest a 6" legnth the 3" is very tiny and doesn't give as much. As for diameter, just take a look at the pipe and figure out inner diameter.



15.9 @ 86.7mph

Injen CAI, 55mm TB, P&P Intake, Crower Cams, Hooker Header, ERT/Catco Cat, GS-T Muffler, AFX UDP, Crane Ign Amp, S-AFC