IRS strength?
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From: St Louis, MO
Re: IRS strength? No, they're not weak. There is a C5 in the 8's with a stock rear, and at least 6 or 7 in the 9's with stock rears. Pretty much every C5 runs a stock rear end.
There is only one upgrade that people use, its an output shaft that goes inside the rear end housing. I think more people break the stock output shaft when rolling out after the burnout than the launch.
Half shafts are not a problem as far as I know.
Eric
There is only one upgrade that people use, its an output shaft that goes inside the rear end housing. I think more people break the stock output shaft when rolling out after the burnout than the launch.
Half shafts are not a problem as far as I know.
Eric
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Joined: Mar 2002
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From: Kemah, Tx.
Re: IRS strength? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by 66ImpalaLT1:
<strong> No, they're not weak. There is a C5 in the 8's with a stock rear, and at least 6 or 7 in the 9's with stock rears. Pretty much every C5 runs a stock rear end.
There is only one upgrade that people use, its an output shaft that goes inside the rear end housing. I think more people break the stock output shaft when rolling out after the burnout than the launch.
Half shafts are not a problem as far as I know.
Eric </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I dunno about this quote. Yes the output shaft can break. The halfshafts can break. I am not doubting what you say above but alot of folks that are running 450+rwhp and drag racing their cars seriously(ie heavy duty clutches and slicks/ET streets), have hardened parts in the rear....especially half shafts. When you start putting down serious power, then you put a strong clutch in, then you put tires that grip.....something in between is gonna blow at some point. The stock parts just weren't meant to handle that kind of abuse. I find it hard to believe that the 9 sec vettes out there have totally stock rear ends. It takes about 600rwhp in a vette to get into the 9s.....I just don't see the stock parts handling it.
<small>[ March 11, 2003, 06:30 AM: Message edited by: FLYNLO ]</small>
<strong> No, they're not weak. There is a C5 in the 8's with a stock rear, and at least 6 or 7 in the 9's with stock rears. Pretty much every C5 runs a stock rear end.
There is only one upgrade that people use, its an output shaft that goes inside the rear end housing. I think more people break the stock output shaft when rolling out after the burnout than the launch.
Half shafts are not a problem as far as I know.
Eric </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I dunno about this quote. Yes the output shaft can break. The halfshafts can break. I am not doubting what you say above but alot of folks that are running 450+rwhp and drag racing their cars seriously(ie heavy duty clutches and slicks/ET streets), have hardened parts in the rear....especially half shafts. When you start putting down serious power, then you put a strong clutch in, then you put tires that grip.....something in between is gonna blow at some point. The stock parts just weren't meant to handle that kind of abuse. I find it hard to believe that the 9 sec vettes out there have totally stock rear ends. It takes about 600rwhp in a vette to get into the 9s.....I just don't see the stock parts handling it.
<small>[ March 11, 2003, 06:30 AM: Message edited by: FLYNLO ]</small>
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From: St Louis, MO
Re: IRS strength? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by FLYNLO:
<strong>I dunno about this quote. Yes the output shaft can break. The halfshafts can break. I am not doubting what you say above but alot of folks that are running 450+rwhp and drag racing their cars seriously(ie heavy duty clutches and slicks/ET streets), have hardened parts in the rear....especially half shafts. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I havent heard of anyone upgrading the half shafts yet. Pretty much everybody replaces the rear end output shaft. It seems the next thing to go is the transmission output shaft, then the input shaft.
Eric
<strong>I dunno about this quote. Yes the output shaft can break. The halfshafts can break. I am not doubting what you say above but alot of folks that are running 450+rwhp and drag racing their cars seriously(ie heavy duty clutches and slicks/ET streets), have hardened parts in the rear....especially half shafts. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I havent heard of anyone upgrading the half shafts yet. Pretty much everybody replaces the rear end output shaft. It seems the next thing to go is the transmission output shaft, then the input shaft.
Eric
Re: IRS strength? Believe it...
LPE and MTI are probably putting out the fastest C5s in the country. LPE with their TT 427 and MTI with their heads/cam/nitrous packages. Both have ran consistant 9s, not sure if MTI has gotten an 8 sec C5 yet, but LPE has their TT 427 running consistant 8.9s. The best run was 8.95 @ 153mph. STOCK REAR END! 3.42 gear ratio, prepped 4L60E from Carl Rossler. The transmission has been put through hell in both the TT 427 vehicles (and both are pulling high 8s low 9s).
Not saying the half shafts and all the other rear end components arent strong, but thats some insane times for stock components, and in time they probably will break, but they havent yet, so keep on runnin <img border="0" alt="[evil]" title="" src="graemlins/gr_devil.gif" />
Oh, and the TT 427 is pushing about 850rwhp and they say its already begging for more
<small>[ March 11, 2003, 11:23 AM: Message edited by: Ling_650vette ]</small>
LPE and MTI are probably putting out the fastest C5s in the country. LPE with their TT 427 and MTI with their heads/cam/nitrous packages. Both have ran consistant 9s, not sure if MTI has gotten an 8 sec C5 yet, but LPE has their TT 427 running consistant 8.9s. The best run was 8.95 @ 153mph. STOCK REAR END! 3.42 gear ratio, prepped 4L60E from Carl Rossler. The transmission has been put through hell in both the TT 427 vehicles (and both are pulling high 8s low 9s).
Not saying the half shafts and all the other rear end components arent strong, but thats some insane times for stock components, and in time they probably will break, but they havent yet, so keep on runnin <img border="0" alt="[evil]" title="" src="graemlins/gr_devil.gif" />
Oh, and the TT 427 is pushing about 850rwhp and they say its already begging for more
<small>[ March 11, 2003, 11:23 AM: Message edited by: Ling_650vette ]</small>
Re: IRS strength? Talked with my friend the other day, and he said the IRS on the TT 427 is stock. GM is actually going to "rip apart" the rear end and examine it, because its handling almost 900rwhp and close to 1000 ft/lbs. AND ITS STILL TOGETHER!!! <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" /> I think he said the u-joints may have been replaced, but im not 100% certian about that, but to answer the question as to how strong they are....very <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
