Author Topic: (mostly)Stock c10 quarter time  (Read 5309 times)

Offline Qman

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(mostly)Stock c10 quarter time
« on: August 13, 2016, 12:10:13 AM »
I have a 1986 C10 fleetside long bed. Im guessing it weighs about 4k lbs. It has a stock LT9 (smogger)350 in it but aftermarket air cleaner and full duel exhaust with long tubes and two huge free flow dynomax mufflers. Made anywhere from 165-185 from the factory which is pretty wimpy, i know. Its backed by a 4 speed manual with a 3.08 rear end. Anyway,  to the point! Im planning on going to the drag strip next weekend just for fun with a bunch of friends in their equally slow cars.  Im wondering if anybody knows what quarter mile times and trap speeds i can be expecting. Traction is by far not an issue with my rear end and wheel setup. My shifts arent perfect but they are quick. (probably only gonna shift twice anyway during)
Thanks,  -Q
1986 C10 LWB. Daily'd project.
(Mild 350, nv3500, 3.08 rear w/locker, slightly lowered) the drift truck
It puts the "fun" in "functional"

Offline Irish_Alley

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Re: (mostly)Stock c10 quarter time
« Reply #1 on: August 13, 2016, 07:36:15 AM »
hate to say it but with the sm465 you might see 18. you could get a speedometer app on your phone and just run it and see what it shows. the sm465 is a strong trans but not a good fast shifter and will kill your time imo
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

Offline VileZambonie

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Re: (mostly)Stock c10 quarter time
« Reply #2 on: August 13, 2016, 07:52:25 AM »
Let us know how you do. How are your driving skills? Can you speed shift the granny tranny?  :D
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Offline Stewart G Griffin

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Re: (mostly)Stock c10 quarter time
« Reply #3 on: August 13, 2016, 01:10:55 PM »
i did a 16.8 with a crate 350 and 2.56 rear gear, so you should be able to do at least that.

The 305 produced a 17.9

i only did it to see what the engines could do.

i will be testing the 4.3 asap.


Offline Irish_Alley

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Re: (mostly)Stock c10 quarter time
« Reply #4 on: August 13, 2016, 01:24:05 PM »
stew his trans is going to kill his time
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

Offline zieg85

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Re: (mostly)Stock c10 quarter time
« Reply #5 on: August 13, 2016, 02:16:15 PM »
There is talk of re-opening a dragstrip in NW Indiana.  US30 dragway...  If I ever get the chance to move back to the area, (still own my house up there)  I am going to build something for that track.  It is supposed to be an 1/8th mile but I want a stick to make it fun...
1985 C30 Custom Deluxe Ext. cab 5.7L TH400 3.21 
1985 C20 Scottsdale 7.4L 4 speed 3.21
1986 C10 under construction
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Offline Qman

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Re: (mostly)Stock c10 quarter time
« Reply #6 on: August 18, 2016, 03:37:57 PM »
hate to say it but with the sm465 you might see 18. you could get a speedometer app on your phone and just run it and see what it shows. the sm465 is a strong trans but not a good fast shifter and will kill your time imo

Yeah the trannys gearing...it's less than ideal. But i can shift it pretty quick. I can get a chip in second. Synchros are kinda shot in third too. I get a nice little metal crunch if I go quick but not too bad. I tried one of those GPS acceleration apps and it said I did a 17.0 but I'm not sold on the accuracy...apparently I did a 10 second 0-60 in the same run. Figured it was quicker than that since I only shift once to get there  ???
Anyway. The strip's et does not lie. I'll post up the time slip Saturday night :)
1986 C10 LWB. Daily'd project.
(Mild 350, nv3500, 3.08 rear w/locker, slightly lowered) the drift truck
It puts the "fun" in "functional"

Offline Qman

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Re: (mostly)Stock c10 quarter time
« Reply #7 on: August 18, 2016, 03:40:01 PM »
 .
« Last Edit: February 28, 2018, 08:54:19 PM by Qman »
1986 C10 LWB. Daily'd project.
(Mild 350, nv3500, 3.08 rear w/locker, slightly lowered) the drift truck
It puts the "fun" in "functional"

Offline Qman

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Re: (mostly)Stock c10 quarter time
« Reply #8 on: August 18, 2016, 06:51:12 PM »
Oh and it's not a sm465 but rather the new process 4 speed. I have no granny gear. Just a straight up 4 speed.
1986 C10 LWB. Daily'd project.
(Mild 350, nv3500, 3.08 rear w/locker, slightly lowered) the drift truck
It puts the "fun" in "functional"

Online 1967KaiserM715

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Re: (mostly)Stock c10 quarter time
« Reply #9 on: August 18, 2016, 07:16:50 PM »
Oh and it's not a sm465 but rather the new process 4 speed. I have no granny gear. Just a straight up 4 speed.
So that's why you can shift fast(ish), I've driven a 465, it really is a 3spd with a low, and it will not shift fast, one was fronted by a 292 straight 6, the other fronted by a 350. I can shift my deuce and a half faster(even with a shot second gear syncro) and a full 5 speed


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Current Vehicles:1985 GMC K10(Daily) 1991 GMC K2500(Daily) 1975 Beetle(not running) 1985 Mercedes 300D(not running) 1952 M35    1967 M715(not running)
 1986 Chevy K30(under repair)

Offline Qman

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Re: (mostly)Stock c10 quarter time
« Reply #10 on: August 18, 2016, 08:06:23 PM »
Oh and it's not a sm465 but rather the new process 4 speed. I have no granny gear. Just a straight up 4 speed.
So that's why you can shift fast(ish), I've driven a 465, it really is a 3spd with a low, and it will not shift fast, one was fronted by a 292 straight 6, the other fronted by a 350. I can shift my deuce and a half faster(even with a shot second gear syncro) and a full 5 speed


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So what's up with these 465's? The granny gear I can understand but besides that? Just bad gear synchronizing? Really long throws? What makes em notorious. Sorry about OT, just curious. Hijacking my own thread, lol.
1986 C10 LWB. Daily'd project.
(Mild 350, nv3500, 3.08 rear w/locker, slightly lowered) the drift truck
It puts the "fun" in "functional"

Online 1967KaiserM715

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Re: (mostly)Stock c10 quarter time
« Reply #11 on: August 18, 2016, 08:32:11 PM »
Long throw, and big gear gap, the 350 was better, but the 292 was rev high, wait for rpms to drop before letting clutch go for the 1st to 2nd shift. If you didn't wAit, it would buck like a bronco as the engine speed came right down, but still enough rpm trying to speed up everything. The clutch wasn't real grabby either, but it did not like the 1st to 2nd shift unless you let the rpms come way down


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Current Vehicles:1985 GMC K10(Daily) 1991 GMC K2500(Daily) 1975 Beetle(not running) 1985 Mercedes 300D(not running) 1952 M35    1967 M715(not running)
 1986 Chevy K30(under repair)

Offline Qman

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Re: (mostly)Stock c10 quarter time
« Reply #12 on: August 20, 2016, 08:46:53 PM »
Best pass of the day: 16.1 @ 83 mph. It was enough to edge out an 80s z28 and an Oldsmobile. Everything else destroyed me lol.
1986 C10 LWB. Daily'd project.
(Mild 350, nv3500, 3.08 rear w/locker, slightly lowered) the drift truck
It puts the "fun" in "functional"

Offline Stewart G Griffin

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Re: (mostly)Stock c10 quarter time
« Reply #13 on: August 20, 2016, 10:31:51 PM »
Well that's not bad for a smogger v-8 in a heavy truck.

i'm thinking the z-28 was tired as they should be able to do mid 15's.


Offline Qman

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Re: (mostly)Stock c10 quarter time
« Reply #14 on: August 21, 2016, 07:14:47 AM »
i'm thinking the z-28 was tired as they should be able to do mid 15's.
Most likely. I got a better launch and then we kinda stayed even the whole way. Nobody pulled
1986 C10 LWB. Daily'd project.
(Mild 350, nv3500, 3.08 rear w/locker, slightly lowered) the drift truck
It puts the "fun" in "functional"