Oh and Ron: Post 89. how to balance your mounts.... and Hatrick has simply awesome drag strip times with a basically stock Balt...amazing...

 

Quick,

Thanks for replying to my issues. It's appreciated. I didn't quote your post here in order to save bandwidth.

I did follow the online instructions right after I installed the first time. What I didn't do was loosen the through bolt on the rear mount, so my guess is that it is now in tension and didn't allow the engine to rotate properly. I'm off on company shutdown for the holidays, and I will go through the proceedure once again. I most certainly did loosen the top three bolts on the pass side mount.

As for the hop I get in low gear, it also happens at low rpm if I get the tires spinning. So basically, any time the tires spin in low gear, it hops. Not as bad as stock, but it will still get quite violent. Wet or dry. The fact that my FWD Calais didn't do this is a source of puzzlement. One would think GM moved forward with this better design. (The fact that GM had to produce their own anti wheel hop kit for the Cobalt is a clue eh?)

BTW.....with the stock mounts, at the dragstrip, I broke the trans. I have no aspirations of drag racing this car.

As for not doing burnouts in first gear in my Nova? The torque multiplication in low gear coming out of the water is brutal when the slicks grab. Easy to break the trans. I do mine in high gear.

FWIW....I watched a stock Redline at the track hop violently. Watched a Cobalt SS/TC run, no hop. So GM fixed something in the SS/TC.

Shop manual? I didn't need one because I bought the car new, I planned on no repairs being done by me. Now that I'm fooling with it myself, I do need to get one. I always have them for my cars. Not sure how that would help with modified mounts though. You and OTTP could make a really nice set of instructions, print em up and send with the parts. You could even add pictures!

Finally, thanks for acknowledging that I'm an accoplished drag racer. Been at it for 30+ years and never dreamed that a car that I drive to the track could run low nines and wheelie onto the bumper. Nitrous is fun stuff.

I just want to use the power of the Balt more effectively. I really like the car.

I'll let you know how things progress.

BTW.....an auto trans, a good one, would be fun in these cars. I get tired of shifting during the daily crawl to work.

Ron

 

to my knowledge ron, the ss/tc's have a "rotated mount" to speak of. also, they have ALOT better axles.

 

If i remember correctly, asymmetrically stiff axles also help.

Stu, the TC's have a stiffer rubber compound as well as a revised orientation.

 

They do not have rotated mounts , just a different insert and larger axles

yes stiffer NO not revised orientation. I got the darn things up the ying yang here. TC with the traction control turned off hop like crazy and break axles. Someone on here did it.
The TC axle shaft is large in diameter than a duramax 2500 4x4 front cv axle...wow!

BTW a stock TC has computer driven torque management. Let the computer eliminate wheels spin.

Mercedes do the same thing. The AMG I owned had power hop so bad it was nuts. So they let the computer do the work. And you can not disable MB traction control if you disconnect it the car shuts down.Stock C5 C6 power hop like a bitch. Stock C4 brake hopped without abs like a bitch. F cars were awful with brake hop. Rain, F cars power hop.

I will work on pictures and instructions, but its hard to get excited to do that it makes it even easier to copy the work, which has happened already. I could post dimensions for upper mounts, but why? Its my living such as it is. I got an idea for the drivers side mount, Josh wants it in billet, Ihave the drawings. I make it. test it. and it will be copied. Oh and folks will want it for 49.95 That sucks...

 

somebody broke a tc axle? that i would like to see.

 

Being in a similar boat as Ron, I will try to address some of the points that I think people like us have with these mounts as well as the people on this forum.

As soon as possible is quite vague. Why not just start in 2nd? That is technically as soon as possible. Secondly, I have had multiple people on here tell me that with these mounts, they can drop the clutch in 1st gear at 4K rpms and NO HOP. So either they are lying or you are. Personally, I put my money on them, mainly because it is apparent that you are one of the most knowledgeable people on this forum and are always very helpful.



In my case, this is not too far off from how the rotated mount performs. The idle/low RPM rattling/shaking is identical to when I had ALL solid poly mounts. Now this is the ONLY possible area that I would agree could be an issue with my car. My car seems to idle slightly low (750 RPM) and tends to shudder on occasion when coming to a stop. I believe it is an issue with the idler pulley, but have not had it looked at yet. But again, there have been many on here claiming that these mounts give a ride identical to the stock mounts, and that is simply not true. Anyone that has driven on stock mounts for months, then installed these can tell the difference immediately. Now normally that wouldn't be a complaint because I'm willing to sacrifice a bit of ride quality for smooth launches, but if they aren't correcting the wheelhop either, then really all they are doing is creating a harsher ride.

Other than that my car runs great and has never been in an accident. So any problem that it has which is causing the mounts not to work properly was there when it left the factory.


Yes and I think for some reason they want to keep it a secret. I have inquired to their methods numerous times with no straight answer. I think maybe they are afraid of someone beating their times?

Actually, I think this might be the best advice yet. When I had full poly mounts w/ basically stock LSJ power, my wheelhop was 95% gone. Yes, I know you're not going to floor it in 1st on a daily basis, but there are scenarios in which it happens and you don't have the stickiest road surface, and the piece of mind that you didn't just break your car is nice. Although, I'm not so sure power has much to do with it. I've owned quite a few cars ALL of which had less power than my Cobalt, and all could spin the tire/tires with no hop. They were also all autos and none had LSD. I've never driven a car w/ similar platform & power as my car, so it's hard to know if what I'm experiencing is due to my driving habits, the car, or both.