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73-87 Chevy _ GMC Trucks
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Performance
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1/4 mile times:
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Topic: 1/4 mile times: (Read 24324 times)
HAULIN IT
Senior Member
Posts: 1542
Re: 1/4 mile times:
«
Reply #15 on:
September 10, 2008, 05:18:46 PM »
Cool! Can't see the "picture above" Try again. Why such high 60' off the trans brake? 135mph is REALLY cookin' Thanks, Lorne More pictures Please!
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leprcon
Newbie
Posts: 17
Re: 1/4 mile times:
«
Reply #16 on:
September 10, 2008, 06:05:37 PM »
weight isn,t where it should be, over the rear wheels gets a little loose usually just foot brake it but its there so i use it i t makes me more consistent but what i lack in 60 ft i make up in mph its like a freight train lol
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team39763
Senior Member
Posts: 1194
Re: 1/4 mile times:
«
Reply #17 on:
September 18, 2008, 08:55:01 AM »
Oh yeah, that thing is movin' out. I hope I can get my truck to run like that one day. It would surely turn some heads. You(LEPRCON) and Lorne got some fast trucks.
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Captkaos
OWNER and Administrator
Administrator
Senior Member
Posts: 18376
Re: 1/4 mile times:
«
Reply #18 on:
September 18, 2008, 09:26:46 AM »
Who's frontend are you using?
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Chris Lucas
73-87chevytrucks
captkaoscustoms
squarebody
leprcon
Newbie
Posts: 17
Re: 1/4 mile times:
«
Reply #19 on:
September 19, 2008, 04:01:23 PM »
up22 junk im actually thinking about putting metal back on and just gutting it
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Stewart G Griffin
Senior Member
Posts: 3324
Re: 1/4 mile times:
«
Reply #20 on:
October 07, 2010, 05:35:32 PM »
i don't know---i just had a hankering to try it today:
17.9 e.t.
Now we have to remember this is a stock LG3 305 with a 2 barrel.
i was, however, able to still spin the right rear tire. And i did not load up against the converter either---i left off idle.
1/4 tank.
The 305 still had enough torque to spin the tire for about 6-10'. With 2.56 gears!
Still couldn't get the 0-60 timer to work for some reason.
70ish degrees. i have no idea what timing is set at and the only thing that is modified would be dual exhaust with flowmasters.
Stats:
Stock LG3 305 with rochester 2 bbl
Th-350C trans
2.56 rear diff gear non-posi
Off brand 235/75 r 15's
Weight---stock 1/2 ton
Dual exhaust with stock exhaust manifolds. Flowmaster mufflers.
«
Last Edit: October 07, 2010, 05:41:21 PM by Stewart G Griffin
»
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Layne
Senior Member
Posts: 1023
Re: 1/4 mile times:
«
Reply #21 on:
October 07, 2010, 11:53:26 PM »
Stew, That's gonna screw up your gas mileage...
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77 c-10 - 77 400 86 700r4 "Emmy"
83 citation - 2.5L Four on the Floor!
88 sierra - reman 350 700r4 "Eleanor"
All normal practicality and rational money handling goes out of the window when it comes to my truck.
Stewart G Griffin
Senior Member
Posts: 3324
Re: 1/4 mile times:
«
Reply #22 on:
October 05, 2011, 10:17:43 PM »
Wow, it's been almost a yr since my last attempt. Today i, for some reason, had a hankering to try it again ( i did not realize the last time was 10/7/10). i thought because it was cooler----this was at 10PM i would get a better time.
18.3
No wheelspin this time---i had to get a new tire (see post in the body section entitled "Don't be too cheap......") A hankook optimo 727.
So i think the only reason why i had wheelspin last time was because i had off brand 15yr old tires? Because there was no wheelspin the timer registered a slower and more accurate since it reads off the transmission's output for the speedo cable.
i was amazed at the acceleration in 1st gear.
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Irish_Alley
Tim
Global Moderator
Senior Member
Posts: 13319
Family is not an important thing. It's everything.
Re: 1/4 mile times:
«
Reply #23 on:
October 05, 2011, 10:51:51 PM »
the timers should set off at the first sign of movement from the speedo cable so it would give you a reading if you timed the tree perfect with no delay
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If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley
When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes
Irish_Alley
Tim
Global Moderator
Senior Member
Posts: 13319
Family is not an important thing. It's everything.
Re: 1/4 mile times:
«
Reply #24 on:
October 05, 2011, 10:53:16 PM »
also that gearing seams way to high for a truck my impala has 2.9 and its a 14 sec car
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If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley
When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes
1979C20
Senior Member
Posts: 1659
Kyle Taulton.
Re: 1/4 mile times:
«
Reply #25 on:
October 05, 2011, 10:56:31 PM »
Before my new heads and tires, I ran a 18.62 at 87. I havent tested it yet. Its my C20 in my sig.
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1979 SCLB C20 Q-jet 350 SM465 14b F.F. 4.10 G80
1989 GMC Suburban V2500 TBI350 TH400 4in lift 35's 14b SF
Stewart G Griffin
Senior Member
Posts: 3324
Re: 1/4 mile times:
«
Reply #26 on:
June 12, 2022, 02:28:55 PM »
Sorry it took so long; i was busy with family stuff.
4.3 v-6 this time.
Using the Race Timer app:
1/4 mile
19.8 secs 70mph
0-60
13.5 secs and it took 778 feet
Using stopwatch and physically measuring 1320 feet:
19.60 secs.
These are NOT great times, but at least now the engine runs right. i had to get the heads fixed-----valve seats no good and a few valves bad.
i left off idle, but the second run i ran it up against the converter just a little and got some wheelspin.
Now, we have to remember that even with the v-6, i'm still around 3700-3800 lbs. i have 2.56 rear and the tires are 29 inches tall 235/75 15. Also, i don't have vortec heads.
i have to add that i couldn't seem to get it to rev past 3600 rpm or so.
This was on a road that, for some reason, just doesn't have a whole lot of traffic and never did----like one car every few minutes. This is the road that my uncle would take me for rides on when he was testing his cars. Was he a bad influence on me? Yes!
«
Last Edit: June 12, 2022, 02:55:41 PM by Stewart G Griffin
»
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73-87 Chevy _ GMC Trucks
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1/4 mile times: