Need Input- 1/4 Mile & Trap Speed

Old April 16th, 2019, 07:27 PM
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Need Input- 1/4 Mile & Trap Speed

Need opinions. Building a 67 Olds w/455. What 1/4 mile time & trap speed is reasonable for this build: 3200lbs (lightened), 440hp 468ci (.060 over), built 200R4 (steeper 1st gear, OD, etc), 3.55 axle w/Eaton posi, and a set of Mickey Thompson Sportsmans (L60s rear and 225/70 front)? What 1/4 time & trap speed should this combo be able to attain?

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Old April 16th, 2019, 08:21 PM
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440 crank shaft HP has the potential to run 121.5 MPH @ 3200 pounds. 1320/121.5=10.86 ET. Now the question is: will the OD trans let you reach that potential, I don't think so, but the results will be interesting. I will say high 11s to 12s.
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Old April 17th, 2019, 08:20 AM
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Originally Posted by VORTECPRO View Post
440 crank shaft HP has the potential to run 121.5 MPH @ 3200 pounds. 1320/121.5=10.86 ET. Now the question is: will the OD trans let you reach that potential, I don't think so, but the results will be interesting. I will say high 11s to 12s.
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Old April 17th, 2019, 09:02 AM
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Thanks for the thoughts Vortecpro. I was thinking low 12s @ perhaps 110mph. I'll report once running and dialed in. Thanks again.
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Old April 17th, 2019, 08:19 PM
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HMMMM the big question is how efficiently can you put the power down. I ran 12.20's with about 360 HP from a 355 olds and I know I was leaving some on the table but the 360 HP was based off of the 1/4 mile trap speed and weight. Hit the track and get some base numbers.
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Old April 18th, 2019, 07:58 AM
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Easy 12's but 11 sec potential if you can 60 foot good IMO
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Old April 19th, 2019, 06:49 AM
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Originally Posted by VORTECPRO View Post
440 crank shaft HP has the potential to run 121.5 MPH @ 3200 pounds. 1320/121.5=10.86 ET. Now the question is: will the OD trans let you reach that potential, I don't think so, but the results will be interesting. I will say high 11s to 12s.
That sounds more the rear wheel HP to me....
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Old April 19th, 2019, 05:55 PM
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Originally Posted by GEARMAN69 View Post
That sounds more the rear wheel HP to me....
Crankshaft HP.
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Old April 20th, 2019, 10:00 PM
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Great Input

Thanks to all for the great input, I expect it to run well. I would be pleased with perhaps a 12.2 @ 110. Though Im sure it wont stop there. Thanks again to all.
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