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343 quarter mile time Expectations. |
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Gregpate58 
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Joined: Nov/29/2021 Location: Caney Kansas Status: Offline Points: 54 |
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 Topic: 343 quarter mile time Expectations.Posted: Mar/04/2023 at 11:09pm |
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I just bought a 68 javelin SST with a 343 engine. It had headers and traction bars and a few other little things. With a 354 rear gear what kind of quarter mile times could a person expect?
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bikerfox
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Joined: Aug/02/2009 Location: USA Status: Offline Points: 4464 |
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Posted: Mar/05/2023 at 11:42am |
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i'm sure the experts will chime in on this one.
you could use an online calculator like this one to get an approximation: https://robrobinette.com/et.htm
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1969 Rebel SST (1970-1987)
1968 AMX (2005-2011) 1969 SC/Rambler (2011-2019) 1970 Javelin (2019 to ?)"Jane" |
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sweatlock
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Joined: Apr/28/2014 Location: Largo, FL Status: Offline Points: 3314 |
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Posted: Mar/05/2023 at 6:13pm |
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The assumption with 3:54 gears is that you have a 4-spd manual transmission; however, that would be an assumption.
Edited by sweatlock - Mar/05/2023 at 6:19pm |
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Sonic Silver
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Posted: Mar/05/2023 at 6:20pm |
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WesternRed
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Posted: Mar/05/2023 at 6:28pm |
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I'd guess maybe mid 14's and somewhere in the mid 90's mph. 354 gears will certainly help and you can't go wrong with headers and traction bars.
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I've finally given up drinking for good...........now I only drink for evil.
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Jeff Lee
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Joined: May/14/2023 Location: Anthem AZ Status: Offline Points: 158 |
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Posted: May/15/2023 at 1:15am |
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Had a ’69 BBO AMX. Originally a 390 AMX but had a 343 in it with a Torker on it (was on it when I bought it), stock Carter carb, log exhaust manifolds, 4-speed and 3.54:1 rear gears. Took it to the track where traction on the BF Goodrich Radial T/A's was poor. Ran 15.20. About what I expected. But what really surprised me was the 96 MPH. Later took off the Torker and installed a cast iron manifold. On the street, I couldn’t tell any difference. Did not go back to the track.
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BBO UK
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Joined: Feb/17/2020 Location: UK Status: Offline Points: 288 |
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Posted: May/15/2023 at 10:50am |
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As Sonic said it depends on "a few other little things." The stock looking 343 in my Javelin when I got it had a steel crank, solid lifters, headers, huge carb. and a full race cam. "A few other little things" covers a lot of territory! Try running it and find out!
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mbwicz
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Posted: May/15/2023 at 11:18am |
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Set your expectations for mid 15's. anything better will be a bonus.
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1970 AMX, one step forward, one step back. Both steps cost time and money.
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BBO UK
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Posted: May/15/2023 at 3:11pm |
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X 2 Also hope you have better luck with your 343, mine had been built, raced, and was worn out! Replaced with a 360/727
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motorhead_1
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Posted: May/19/2023 at 11:47am |
if a 3/4 race cam had 270 degrees duration, does a full race cam have 360 duration?
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69 SC/Rambler tribute 401/th400, 68 Rebel SST LSA, 66 F100 460/c6, 88 Merkur Xr4Ti, 71 Jaguar XJ6 LS1, 08 Supercharged Tundra
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Gregpate58 wrote: