The "New" mounts are in! Whoot!
Here they are prior to install after taking them out of the jig.
Initial impressions are thus:
1. Vibration at idle in park is slightly noticeable.
2. Vibration at idle in gear is VERY noticeable. BUT, I am still running on the factory injectors and they have not been cleaned in about 40,000 miles.
3. Vibration at any RPM above 450 is non-existent. Throttle response in lower gears at any RPM above 1000 is nearly instantaneous.
Overall an excellent upgrade for occasional track time with the caveat that if you do this and want to retain the stock soft idle feel, use the lower 60A durometer polyurethane. This will allow it to absorb more vibration while retaining the strength of filling the whole mount as I have done.
80A vs. 60A vs. 40A:
Code:
Durometer Tensile Str., psi Tear Str., PLI
80A 1725 240
60A 1250 165
40A 950 120
You may be able to go as low as 40A, but I suspect on the SRT6 they would fail being that soft.
Looks like I will have to look at the rough idle now, which was completely unnoticeable even with the substitute mounts. Possible crank sensor? or fuel injectors? Further investigation is in order.
Questions? Comments?