The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 10-13-2005, 12:04 PM   #1
Guardrail
And Don't Call Me Shirley
 
Guardrail's Avatar
 
Join Date: Oct 2005
Location: Cameron Park, CA
Posts: 115
Bracket Racing a Longbed

Well, I've been working on my new 71' Cheyenne LWB a little bit. Window regulators, steering wheel swap, minor tune up, lube, and safety check. The past two wednesday nights I've been bracket racing it at Sacramento Raceway. This truck is great for bracket racing because it always does the same thing run after run, but this whole two piece driveshaft thing is freakin' me out. I'm afraid to load the engine against the brakes when staging and it's causing my reaction times to suffer. The center support was replaced just before I got the truck but I don't like it. Not only do these driveshafts look wimpy to me, but the center support isn't even bolted on. It's got a hose clamp holdin' the thing up there. I'll say it again--I DON"T LIKE IT!! I really don't want to leave this thing laying on the staring line. Can anyone out there share some of their experience with these? Is anyone else out there drag racing a longbed? Everything else about this old truck is STOUT. Maybe I'm just being paranoid.............
Guardrail is offline   Reply With Quote
Old 10-13-2005, 12:10 PM   #2
70c10
67-72 Addict!
 
70c10's Avatar
 
Join Date: Feb 2002
Location: The TAX State!
Posts: 7,856
Hopefully bigjimz111 will see this and chime in. He's in CA also and has a fast longbed that he races alot.
__________________
Jim

1970 C/10 Fleetside w/Ghost Flames
Lowered 4.5" front and 4" rear (Raked)
355/350 Turbo w/shift kit
10" Redneck Performance Verter w/2500 stall
Hooker Super Comps part#2808-1
Performer RPM Air-Gap
12 Bolt w/3:73 gears- Eaton Posi
Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads
70c10 is offline   Reply With Quote
Old 10-13-2005, 12:17 PM   #3
Jim_PA
Registered User
 
Join Date: May 2005
Location: PA
Posts: 2,696
What's done to it, and what's it run?
Jim_PA is offline   Reply With Quote
Old 10-13-2005, 12:29 PM   #4
Guardrail
And Don't Call Me Shirley
 
Guardrail's Avatar
 
Join Date: Oct 2005
Location: Cameron Park, CA
Posts: 115
Nothin, it's stock. 350/th350, 12 bolt 3.07. It runs 16.80's @ 80 mph time after time. Am I being a wimp?
Guardrail is offline   Reply With Quote
Old 10-13-2005, 01:23 PM   #5
jsbgump
Gone Fishing
 
jsbgump's Avatar
 
Join Date: Aug 2005
Location: Fort Worth, Texas 76135
Posts: 12,361
All you have to do is remove the carrier bearing bracket from the frame and install a one piece drive shaft. You can either get one made or find one the correct length at a wrecking yard. I used to race on a 1/8 mile trck on run what you brung nights and never actually broke my carrier. I went to a one piece so to feel better about running it. best time 9.6 flat can't remeber the speed #.
__________________
68 Chevy Short Fleetside LSX Swap Under Way 3.73 posi 2.5/4 drop Frame of resto has been started
2022 Hyundai Tucson Limited
2019 Chevy Traverse Redline Edition Wifes Ride
Build Thread

http://67-72chevytrucks.com/vboard/s...=1#post3483616
jsbgump is offline   Reply With Quote
Old 10-13-2005, 01:55 PM   #6
Guardrail
And Don't Call Me Shirley
 
Guardrail's Avatar
 
Join Date: Oct 2005
Location: Cameron Park, CA
Posts: 115
Years ago I used to deal closely with a driveline shop that built custom driveshafts. The owner of that shop always warned me about ordering driveshafts that were longer than 60 inches long. According to him there was too much potential for vibration. That's why I kinda ruled out a one piece shaft.....
Guardrail is offline   Reply With Quote
Old 10-13-2005, 02:38 PM   #7
Jim_PA
Registered User
 
Join Date: May 2005
Location: PA
Posts: 2,696
Quote:
Originally Posted by Guardrail
Nothin, it's stock. 350/th350, 12 bolt 3.07. It runs 16.80's @ 80 mph time after time. Am I being a wimp?
I don't know, I was just curious as to what it ran
Jim_PA is offline   Reply With Quote
Old 10-13-2005, 02:57 PM   #8
Z28Owner
.........................
 
Z28Owner's Avatar
 
Join Date: Nov 2001
Location: benton, ky
Posts: 285
whats your 1/8 mile time if you dont mind me asking, just seeing where I might be at if we had a 1/4 track close by thanks.
__________________
1971 LWB Chevy C-10
350/350 3:42 eaton
Z28Owner is offline   Reply With Quote
Old 10-13-2005, 01:54 PM   #9
bigjimzlll
Senior Member
 
bigjimzlll's Avatar
 
Join Date: Dec 2001
Location: Redding,CA...USA
Posts: 4,736
Hi,
I changed to a one piece shaft for the same reasons your talking about. It took a lot of doing though. I had a th400 with a long tail shaft built fot it then I moved the engine back 4". You wont fing a shop to build one thats over 6 foot long and if you did I would'nt trust it. At the speeds your running I would'nt be to worried about the 2 piece though...I never broke mine even going low 13's high 12's. Since Im in the 10's now I thought it was a good idea to swap to a one piece.
__________________
It's called "drag racing" if they called it "tic..tic..WHAM!..BANG! F*&K!!!", they'd have to keep the magazines under the counter with the other men's publications

click the clicky to join the site....
http://67-72chevytrucks.com/vboard/payments.php


67 lwb..first hotrod in 25 years..540 best ET is 9.45 @ 141.44
Anderson,CA
bigjimzlll is offline   Reply With Quote
Old 10-13-2005, 08:34 PM   #10
djracer
Registered User
 
djracer's Avatar
 
Join Date: Feb 2001
Location: Wetumpka, Al, U.S.
Posts: 8,892
I raced my 71 and ran 13.50 with a two piece never had a problem!

My dragtruck on the other hand I hope will run in the 8's with the NOS it has a one piece!
__________________
Kevin

Special Thanks to All who have helped on the TRUCK!

My Pass Time Show http://s129.photobucket.com/albums/p...Chapter1-0.mp4

So Far my best Times are:

Motor only:
6.44 1/8 @ 104.13
10.39 1/4 @ 125.83

Nitrous Times:
5.785 1/8 @ 118.65 with a 1.336 60ft
9.168 1/4 @ 142.58 with a 250 shot dead out of the hole!
djracer is offline   Reply With Quote
Old 10-13-2005, 08:49 PM   #11
71Dragtruck
Registered User
 
71Dragtruck's Avatar
 
Join Date: Jun 2004
Location: Saskatchewan, Canada
Posts: 1,368
I had a custom 2 piece made, 3" chrome moly tubing, it has a splined back piece and a heavy duty carrier with a real bearing in it. Ran 12's on motor, will be running 11's next year, no problem so far.
__________________
Speed is just a matter of money, question is how fast can you afford to go?
8.95@148.97mph all motor haven't tried bottle yet
Sponsored by:
Getz Oilfield Consulting
Hard Candy Customs
71Dragtruck is offline   Reply With Quote
Old 10-13-2005, 09:01 PM   #12
junkyardjohn
Registered User
 
junkyardjohn's Avatar
 
Join Date: Aug 2001
Location: SOMERSET KY.
Posts: 6,425
AS LONG AS THE CARRIER BEARING IS BOLTED PROPERLY TO THE CROSSMEMBER, I WOULDN'T WORRY AT ALL. I HAD A 71 SHORT FLEET WITH A 468 & AROUND 500 RWHP. I HAD A LINE LOCK & SOME 14" WIDE 31" TALL STICKY BFGS & FLOGGED IT UNMERCIFULLY FOR 3 YEARS. IF MINE WAS GOING TO BREAK... I'D HAVE BROKE IT.
AS A SIDE NOTE... I HAVE A PAIR OF 10" WIDE 31" TALL SLICKS MOUNTED ON 5 LUG RALLYS, WITH QUITE A FEW RUNS LEFT IN THEM. THEYRE FREE FOR THE TAKING & HAVE TO BE PICKED UP IN CARSON CITY NV. JOHN AT FK9U812@AOL.COM
__________________
junkyardjohn
69 1 TON TOW TRUCK //
84 4WD CUCV BLAZER// 85 1 TON 4WD STAKE TRUCK// 86 M1031 5/4 TON 4WD CUCV// ALOT OF OLD TRUCKS FOR ONE OLD MAN TO DRIVE. THERES ROOM FOR ALL OF GODS CREATURES RIGHT NEXT TO MY MASHED POTATOES//
LIFE MEMBER OF P.E.T.A (PEOPLE EATING TASTY ANIMALS)

DON'T RENT U-HAUL

ALWAYS TELL THE TRUTH
IT WILL AMAZE PART OF THE PEOPLE & ASTONISH THE REST
junkyardjohn is offline   Reply With Quote
Old 10-13-2005, 09:36 PM   #13
Guardrail
And Don't Call Me Shirley
 
Guardrail's Avatar
 
Join Date: Oct 2005
Location: Cameron Park, CA
Posts: 115
So how do I go about bolting this thing on. The carrier is made of aluminum and I see no bolt holes in it. Does anyone make an iron one? I suppose I could drill this one, but it looks wimpy. Did I mention I DON"T LIKE IT?
Guardrail is offline   Reply With Quote
Old 10-13-2005, 09:48 PM   #14
junkyardjohn
Registered User
 
junkyardjohn's Avatar
 
Join Date: Aug 2001
Location: SOMERSET KY.
Posts: 6,425
Quote:
Originally Posted by Guardrail
So how do I go about bolting this thing on. The carrier is made of aluminum and I see no bolt holes in it. Does anyone make an iron one? I suppose I could drill this one, but it looks wimpy. Did I mention I DON"T LIKE IT?
THAT SURE DOESN'T SOUND LIKE A STOCK OEM CARRIER BEARING TO ME. YOU CAN PICK ONE UP AT NAPA OR ANY OTHER GOOD AUTO-PARTS STORE & HAVE IT PRESSED ON YOUR FRONT HALF OF YOUR 2 PIECE D/S ASSY. JOHN
__________________
junkyardjohn
69 1 TON TOW TRUCK //
84 4WD CUCV BLAZER// 85 1 TON 4WD STAKE TRUCK// 86 M1031 5/4 TON 4WD CUCV// ALOT OF OLD TRUCKS FOR ONE OLD MAN TO DRIVE. THERES ROOM FOR ALL OF GODS CREATURES RIGHT NEXT TO MY MASHED POTATOES//
LIFE MEMBER OF P.E.T.A (PEOPLE EATING TASTY ANIMALS)

DON'T RENT U-HAUL

ALWAYS TELL THE TRUTH
IT WILL AMAZE PART OF THE PEOPLE & ASTONISH THE REST
junkyardjohn is offline   Reply With Quote
Old 10-13-2005, 10:24 PM   #15
stllookn
Saving 1 truck at a time!
 
stllookn's Avatar
 
Join Date: Aug 2001
Location: Kent, WA
Posts: 6,465
<<AS A SIDE NOTE... I HAVE A PAIR OF 10" WIDE 31" TALL SLICKS MOUNTED ON 5 LUG RALLYS, WITH QUITE A FEW RUNS LEFT IN THEM. THEYRE FREE FOR THE TAKING & HAVE TO BE PICKED UP IN CARSON CITY NV. JOHN AT FK9U812@AOL.COM>>


JYJ...I'm on my way...LOL! I will call from my cell phone when I hit the border!
__________________
'68 C20 Longhorn 50th Anniversary 400/TH400
'68 C20 Longhorn 50th Anniversary 468/TH400w/buckets
'72 C20 Halfhorn (Longhorn w/o cab and front clip)
'69 Flxible Cruiser (look up ugly in the dictionary)

Last edited by stllookn; 10-13-2005 at 10:25 PM.
stllookn is offline   Reply With Quote
Old 10-14-2005, 05:04 AM   #16
Rooster's 67
Registered User
 
Rooster's 67's Avatar
 
Join Date: Sep 2003
Location: DFW
Posts: 765
a good two piece shaft is just as good(/solid) as a one piece shaft. pull the shaft and have one made the same lengths, with a good carrier bearing, oversize u-joints and have it balenced to 5000-6000 RPM. you should not have a problem then.
__________________
The problem with America is stupidity. I'm not saying there should be a capital punishment for stupidity, but why don't we just take the safety labels off of everything and let the problem solve itself?
Rooster's 67 is offline   Reply With Quote
Old 10-14-2005, 12:23 PM   #17
Guardrail
And Don't Call Me Shirley
 
Guardrail's Avatar
 
Join Date: Oct 2005
Location: Cameron Park, CA
Posts: 115
Hey Z28Owner, sorry almost missed your question. My 1/8 mile times are right around 10.80 @ 65mph. This board is great and I really apreciate the help you've all given. This truck will be a winner if I can just get my starting line procedure down.
Guardrail is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 02:13 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com