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 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 11-07-2009, 07:41 AM   #1
donut
Registered User
 
donut's Avatar
 
Join Date: Aug 2009
Location: S.C.
Posts: 1,593
Re: Quadrajunk

I'd start with the battery connections. Make sure they're all clean and intact. Same with the grounds and starter connections.
Charging system good? (battery and alt)

IMO these things should be checked this time of year anyway.
Timing could also be a major factor. (too much)
__________________
'86 C-30 dually, 454/tbh400
'73 K-20 350/350/205 (sold )

I'm kinda like duct tape- no real purpose, but handy to have around.
donut is offline   Reply With Quote
Old 11-07-2009, 11:16 AM   #2
bitchin85
Registered User
 
bitchin85's Avatar
 
Join Date: Aug 2009
Location: Lambertville MI
Posts: 962
Re: Quadrajunk

i know this is probably a dumb question but turning the distributor counterclockwise advances it right? i had someone help me with the timing and i think its a little too much advanced
__________________
"I'll keep my guns, money, and freedom. You can keep the "change"
bitchin85 is offline   Reply With Quote
Old 11-07-2009, 02:22 PM   #3
presleyhome
Registered User
 
Join Date: Aug 2006
Location: Feather River Canyon, N. Calif
Posts: 89
Re: Quadrajunk

Excellent piece on timing an older engine:

Timing article link


Jim P
presleyhome is offline   Reply With Quote
Old 11-07-2009, 03:27 PM   #4
cLaWz
Registered User
 
Join Date: Mar 2009
Location: Austin
Posts: 61
Re: Quadrajunk

Great how to on timing. Have no info on the motor in my truck as to recommended timing and was kind of lost as to where I needed to set it at.

Thanks!
cLaWz is offline   Reply With Quote
Old 11-07-2009, 05:30 PM   #5
donut
Registered User
 
donut's Avatar
 
Join Date: Aug 2009
Location: S.C.
Posts: 1,593
Re: Quadrajunk

Quote:
Originally Posted by *****in85 View Post
i know this is probably a dumb question but turning the distributor counterclockwise advances it right? i had someone help me with the timing and i think its a little too much advanced
I believe your right. In your case you'll probably want a little clockwise (retard).
Throw a timing light on it and don't forget to disconnect the vac. advance when setting it.

Quote:
Originally Posted by cLaWz View Post
Great how to on timing. Have no info on the motor in my truck as to recommended timing and was kind of lost as to where I needed to set it at.

Thanks!
There "should" be an emissions sticker that has your timing on it. (pop the hood, it should be right there.) Not sure on the late models, but I think 4' BTDC would be about right. (or a good starting point )

FWIW, my truck runs 10-12' BTDC. A quick search should turn up timing tips as far as how much advance you can run.
__________________
'86 C-30 dually, 454/tbh400
'73 K-20 350/350/205 (sold )

I'm kinda like duct tape- no real purpose, but handy to have around.

Last edited by donut; 11-07-2009 at 05:31 PM.
donut is offline   Reply With Quote
Old 11-07-2009, 11:27 PM   #6
cLaWz
Registered User
 
Join Date: Mar 2009
Location: Austin
Posts: 61
Re: Quadrajunk

No emissions sticker but if there was it wouldn't matter anyway. Truck had a 454 dropped in it along with a bunch of "questionable" repairs from the previous owner.
cLaWz is offline   Reply With Quote
Old 11-09-2009, 12:30 PM   #7
68 TT
Still plays with trucks
 
68 TT's Avatar
 
Join Date: Jul 2009
Location: Spokane, WA
Posts: 3,556
Re: Quadrajunk

Six to eight degrees advanced is a pretty safe number to start with. You can play around with it to see what your engine likes the most.
__________________
miSSed opportunity - ground up creation of an AWD 1994 454 SS that never was http://67-72chevytrucks.com/vboard/s...d.php?t=795577
69 C10 shortbed stepside 400 small block - built like what a super sport truck could have been
69 K20 lwb TBI 350 4L60E NP208 14-bolt Dana-44 w/disc
68 Camaro SS / RS 500hp 439 inch roller cam big block 4L80E
79 Malibu TPI 350 4L60 w/ Z28 steering & sway bars
68 TT is offline   Reply With Quote
Old 11-09-2009, 11:36 PM   #8
bitchin85
Registered User
 
bitchin85's Avatar
 
Join Date: Aug 2009
Location: Lambertville MI
Posts: 962
Re: Quadrajunk

another stupid questioin but how do i know how many degrees exactallly i am advanced?
__________________
"I'll keep my guns, money, and freedom. You can keep the "change"
bitchin85 is offline   Reply With Quote
Old 11-10-2009, 11:09 AM   #9
donut
Registered User
 
donut's Avatar
 
Join Date: Aug 2009
Location: S.C.
Posts: 1,593
Re: Quadrajunk

Timing light, marks on the timing tab, mark on balancer.
Do you have a chilton/haynes manual?
__________________
'86 C-30 dually, 454/tbh400
'73 K-20 350/350/205 (sold )

I'm kinda like duct tape- no real purpose, but handy to have around.
donut is offline   Reply With Quote
Old 11-10-2009, 06:42 PM   #10
big10ratrod77
Registered User
 
big10ratrod77's Avatar
 
Join Date: Aug 2009
Location: hillborough nc
Posts: 410
Re: Quadrajunk

Quote:
Do you have a chilton/haynes manual?
Yesterday 10:36 PM
its a good thing to have
__________________
77 chevy BIG 10 350/sm465/12bolt w 3.73 bout 240 horse power NO power steerin
79 chevy 1/2 ton 250/three on the tree/3.08s soon to get built 250/floor shift conversion/3.08s
81 mercedes 300d 25 MPG
77 chevy BIG DOOLEY 454/sm-465/14 bolt 4.10s "fully loaded"
73 plymouth duster 225 slant six/230 3 speed/8 1/4 trying to acheve 300 horse six http://www.cardomain.com/ride/3135091
'77 chevy trucks. built to stay tough.
life is short build a hot rod
big10ratrod77 is offline   Reply With Quote
Old 11-10-2009, 06:46 PM   #11
bitchin85
Registered User
 
bitchin85's Avatar
 
Join Date: Aug 2009
Location: Lambertville MI
Posts: 962
Re: Quadrajunk

nope not yet but i had number one piston at tdc and lined the number one wire up on the cap with the rotor and turned the distributor mabye 3/4 inch advanced. im going to try to run a timing light onit in te next few days
__________________
"I'll keep my guns, money, and freedom. You can keep the "change"
bitchin85 is offline   Reply With Quote
Old 11-10-2009, 06:56 PM   #12
donut
Registered User
 
donut's Avatar
 
Join Date: Aug 2009
Location: S.C.
Posts: 1,593
Re: Quadrajunk

By chance, while you had it at TDC, did you check the timing marks to verify they lined up?
__________________
'86 C-30 dually, 454/tbh400
'73 K-20 350/350/205 (sold )

I'm kinda like duct tape- no real purpose, but handy to have around.
donut is offline   Reply With Quote
Old 11-10-2009, 07:16 PM   #13
68 TT
Still plays with trucks
 
68 TT's Avatar
 
Join Date: Jul 2009
Location: Spokane, WA
Posts: 3,556
Re: Quadrajunk

Quote:
Originally Posted by donut View Post
By chance, while you had it at TDC, did you check the timing marks to verify they lined up?
Good thing to verify just to know everything is the way it should be before you go much further trying to tune it.

I have come across more than one 350 with mixed vintage balancer and timing cover. Timing will be way off if the parts used do not match.

I have also seen a balancer with the outer ring that has slipped in relation to the center hub too.
__________________
miSSed opportunity - ground up creation of an AWD 1994 454 SS that never was http://67-72chevytrucks.com/vboard/s...d.php?t=795577
69 C10 shortbed stepside 400 small block - built like what a super sport truck could have been
69 K20 lwb TBI 350 4L60E NP208 14-bolt Dana-44 w/disc
68 Camaro SS / RS 500hp 439 inch roller cam big block 4L80E
79 Malibu TPI 350 4L60 w/ Z28 steering & sway bars
68 TT is offline   Reply With Quote
Old 11-10-2009, 07:02 PM   #14
bitchin85
Registered User
 
bitchin85's Avatar
 
Join Date: Aug 2009
Location: Lambertville MI
Posts: 962
Re: Quadrajunk

i didnt even think to but i put a peice of coat hanger in the spark plug hole and had someone turn the crank by hand till it was right at the top
__________________
"I'll keep my guns, money, and freedom. You can keep the "change"
bitchin85 is offline   Reply With Quote
Old 11-10-2009, 09:31 PM   #15
bitchin85
Registered User
 
bitchin85's Avatar
 
Join Date: Aug 2009
Location: Lambertville MI
Posts: 962
Re: Quadrajunk

the motor was rebuilt by a place like jasper(dont remember the name) like 20,000 miles ago.. would they mix match parts? i noticed it had 305 heads on a 350 block...
__________________
"I'll keep my guns, money, and freedom. You can keep the "change"
bitchin85 is offline   Reply With Quote
Old 11-10-2009, 10:11 PM   #16
donut
Registered User
 
donut's Avatar
 
Join Date: Aug 2009
Location: S.C.
Posts: 1,593
Re: Quadrajunk

A timing light is useless if the marks are wrong. A little time checking and you'll know for sure.
__________________
'86 C-30 dually, 454/tbh400
'73 K-20 350/350/205 (sold )

I'm kinda like duct tape- no real purpose, but handy to have around.
donut is offline   Reply With Quote
Old 11-10-2009, 10:18 PM   #17
bitchin85
Registered User
 
bitchin85's Avatar
 
Join Date: Aug 2009
Location: Lambertville MI
Posts: 962
Re: Quadrajunk

ok ill check it out tomorow. thanks guys
__________________
"I'll keep my guns, money, and freedom. You can keep the "change"
bitchin85 is offline   Reply With Quote
Reply

Bookmarks


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 09:04 AM.


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