et vs weight

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Mar 13, 2016 | 08:31 AM

preacher putz

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Instructor

Joined: Jun 2014

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From: Atlanta area Georgia

et vs weight

I need an educated WAG. Have a 96 collectors edition Lt1/auto

Yesterday did a best of 9.001 in the eighth , by removing 38 lbs, how much will this effect et? not looking for much, just need to be comfortably under 8.99

Thanks for your input

Putz

Mar 13, 2016 | 08:51 AM

antfarmer2

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Go on a diet.

Mar 13, 2016 | 09:06 AM

Team Owner

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From: Phila., PA burbs

I think the old rule of thumb is a tenth improvement for every 100 lbs lost. I'm thinking you should easily be under 8.99 (in similar weather, with similar launch).

Mar 13, 2016 | 09:09 AM

grandspt

Drifting

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From: MA

When I raced 1/4 mile track, for every 100lb loss of weight you decrease your ET by about 1/10th of a second.

Mar 13, 2016 | 08:44 PM

69427

Tech Contributor

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From: I tend to be leery of any guy who doesn't own a chainsaw or a handgun.

Quote:

Originally Posted by preacher putz

Depends on where you take the weight out from. Any weight reduction will help the acceleration at the top end (simple F=ma), but taking the weight off the back or from up high (reducing weight shift to the rear) may reduce your traction component more than it reduces your mass/inertia component (ie: more starting line wheel spin and slower 60 foot times).

Mar 15, 2016 | 11:19 AM

Scott442

Intermediate

Joined: Aug 2015

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From: Mansfield TX

Can you post the time slip data? What water temp were you running at the time? I think it should run in the high eights without weight reduction. My stock 94 convertible with a 230 lb. driver has gone 8.93 with 170 - 180 degree water temp.

Mar 16, 2016 | 12:28 AM

Tom400CFI

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From: Park City Utah

Quote:

Originally Posted by Scott442

Can you post the time slip data? What water temp were you running at the time? I think it should run in the high eights without weight reduction.

MY stock '92 has gone 8.89/80mph on a 2.06, 60' time. Furthermore, I did this at 4500' elevation on a 7000' DA. You need to work on the driver mod, I'd bet. Keep at it!

Mar 18, 2016 | 08:40 PM

ghoastrider1

Le Mans Master

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From: indy indiana

this post makes me think on the old argument over whether to have a full tank of gas for the traction or near empty for the weight reduction..same as keeping or taking off the spare tire.