How hard can I leave on this setup? - LS1TECH

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How hard can I leave on this setup?

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Old 10-08-2006, 11:11 AM   #1
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Default How hard can I leave on this setup?

I ran a 10.42 at nearly 135 yesterday, but I left very soft (1.63 60') and didn't go WOT until late 2nd gear. It ran 105 mph in the 1/8. So I picked up 30 mph on the big end, which seems like alot but I suppose thats what happens when you don't give it full throttle the whole time. I am concerned about breaking the trans or rear end on launch. Its a Strange 12 bolt with a posi, I think 31 spline axles, etc. Pretty standard. The tranny is built but I know some guys have busted input shafts on them (4L60E). The kicker is the car is heavy, like 3800 lbs. with me in it. I have cut some 1.5x 60' times last year running mid 11's, and I think it will go 1.4x safely, I just need to know how to "limit" the launch power. Using my foot won't work to well.....
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Old 10-08-2006, 12:09 PM   #2
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I am coiming out of the hole on a 780RWTQ N2O spike. Not sure how long it will last so I started trailering in
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Old 10-08-2006, 12:14 PM   #3
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I was launching at 6,700 rpm and cut 1.47 60ft.'s with a stick
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Old 10-08-2006, 12:15 PM   #4
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You'll never know until you step it up. Moser's are usually very stout. 31 spline is a little small. What do you figure your HP is on launch? Do you have someone handy to tow you home

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Old 10-08-2006, 12:47 PM   #5
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I'm still running 31 spline 9 inch stuff, but I have 35 spline stuff ready to go in. I left off the transbrake cutting 1.35.
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Old 10-08-2006, 01:08 PM   #6
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Its a strange 12 bolt, can't remember if its 31 spline or 33. Gotta ask Billingsley.

I always trailer it, I'm too far to risk it. I just don't want to break it right now, spent a ton this year on it and would like to enjoy it some. I'd rather run mid 10's and have fun than run high 9's and be wrenching all the time.
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Old 10-08-2006, 01:10 PM   #7
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Quote:
Originally Posted by Navy David SS
You'll never know until you step it up. Moser's are usually very stout. 31 spline is a little small. What do you figure your HP is on launch? Do you have someone handy to tow you home

David

I would guess I would be around 500 rwhp at launch if I really hit it. It comes up quick though.
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Old 10-08-2006, 01:12 PM   #8
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What tires out back? What psi? Drag shocks up front?
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Old 10-08-2006, 02:27 PM   #9
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i got 1.52 on a stock tenbolt...your 12 bolt should be fine...the tranny is all up to who built it i cant say
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Old 10-08-2006, 02:45 PM   #10
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Quote:
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What tires out back? What psi? Drag shocks up front?

325/50/15 MT DR's, 18 psi. QA1's all around. I guess I'm lucky, the car has always hooked at the track. It used to even hook on the street in 11 second trim.
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Old 10-11-2006, 06:26 PM   #11
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I'd be causious. My 12 bolt snapped like a twig on launch. It was a strange 12 bolt posi and 33 spline axles w/4.30's. This was off the clutch at 5 grand on 27x9x15 slicks
The rear lasted 4 launches. It did do fairly well for the first 1400 street miles though.
By the way, this was with 370rwhp/365rwtq
Now I have a Moser 9" spool with 4.56 and 28x10x15 slicks and a lot more power.
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