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Old Nov 14, 2008 | 01:31 PM
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Just wanting to see what people is launching at in there bolt on ls1's and what people think would be a good rpm to launch at on verry good prepped track.... with

M/T et Streets
Stock rear end
Stock drive shaft
Bolt ons, and spray....

LS1 by the way!
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Old Nov 14, 2008 | 01:47 PM
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Hmmm...stock rearend..idle

If you want it to last...if not then dump it around 4-4500
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Old Nov 14, 2008 | 02:09 PM
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just dump it 5k rpm if u break somthin just a reason to buy a better one
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Old Nov 14, 2008 | 02:19 PM
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that would be my thinking^
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Old Nov 14, 2008 | 03:53 PM
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Originally Posted by z28rob18
just dump it 5k rpm if u break somthin just a reason to buy a better one
If you got about $2k to spend on a 9", then sure.
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Old Nov 14, 2008 | 04:02 PM
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I launch at 5k on a badly prepped track, I would like to try 5500 but the track wouldnt hold that one.
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Old Nov 14, 2008 | 04:13 PM
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I say 4000 but take the slack out of the clutch were you don't have the line pressure built up it take alot of the sudden impact off the rear.
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Old Nov 14, 2008 | 04:20 PM
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line pressure in a 6spd???
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Old Nov 14, 2008 | 04:35 PM
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well i was on the track last weekend tried launching at about 2500 to 3k and snapped a drive shaft.... so now i have another drive shaft in, you think 3k would be ok on stock parts....
and slack, do you mean bring my clutch pedal out to right about were its going to grab then drop it???


thanks for info guys!
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Old Nov 14, 2008 | 08:43 PM
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that driveshaft must have had a ton of miles on it...you don't usually hear that very often
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Old Nov 14, 2008 | 09:46 PM
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ls1 driveshafts break all the time. ive seen three break in one day at fontana racetrack
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Old Nov 15, 2008 | 06:38 AM
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From: hamilton nj
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yea 3k is good thats about where i launched my car only cuz the street tires but it was still ok anything under that was a bad bog
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Old Nov 15, 2008 | 07:06 AM
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ls1 driveshafts break all the time. ive seen three break in one day at fontana racetrack
was this in cold weather because thats news to me?
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Old Nov 16, 2008 | 09:24 PM
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so 3k! i believe thats what im going with guys!!!
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Old Nov 16, 2008 | 09:35 PM
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Originally Posted by speedshifterNC
was this in cold weather because thats news to me?
here is mine, i think they break perty easy.....
Attached Thumbnails Launch-broke-002.jpg  
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