Need mechanical info on 1972 GP drivetrain - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Lounge For casual talk about things unrelated to General Motors. In other words, off-topic stuff. And anything else that does not fit Section Description.

Reply
 
 
 
Thread Tools Search this Thread
Old 11-08-2006, 02:26 PM   #1
Senior Member
Posts like a Supercharger
Thread Starter
 
Join Date: Sep 2006
Location: Pittsburgh, PA
Posts: 173
Thanks: 0
Thanked 0 Times in 0 Posts
HurstGN is on a distinguished road
Default Need mechanical info on 1972 GP drivetrain

I'm in need of getting a vehicle up and moving reliably under it'* own power. The drivetrain is stock 1972 Grand Prix powered by a big block. Right now the carb is messed up. I don't know if it'* worth trying to rebuild the carb or just buy a new one. One of the reasons I know the current carb is messed up is one of the butterfly'* is messed up. The big long single butterfly at the front of the carb. It'* disconnected from the linkages and if I try to connect it to the linkages, it rotates in the opposite direction of the linkages. (Prolly why it was disconnected)
If there are any experts out there in 72 big blocks, I'd appreciate hearing from you and getting some advice on how to get this beast moving once again.

If a replacement carb is the way to go, any recommendations on where to get it? If rebuild, where to source the rebuild kit?

Thanks,
Dan McCann
HurstGN is offline   Reply With Quote
Old 11-08-2006, 02:30 PM   #2
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

It'* been my experience that a carb in need of help as yours is.. is best left to a professional. Ask around your area for the carb place in the area. Usually there'* one place that stands out.

When I needed a hand with one.. I went to that place and the guy knew in seconds what was wrong and had me out of there for $10 in under 10 minutes.
BillBoost37 is offline   Reply With Quote
Old 11-08-2006, 02:51 PM   #3
Senior Member
Posts like a Camaro
 
Join Date: Aug 2006
Location: West Michigan
Posts: 1,152
Thanks: 0
Thanked 1 Time in 1 Post
Grimm is on a distinguished road
Default

What kind of carburator is it, Rochester? There is a good book by Doug Roe on Rochester Quadrajets that goes into detail about how the carb functions and how to disassemble/assemble them. It also talks about others besides the quadrajet. I used it to rebuild mine. When I first read some of the book it was hard to understand, but once I got the carb off and was able to see the parts in person it helped me to better understand how everything works together. If you are mechanically inclined it shouldn't be too difficult.

I also know of a couple good places to have them rebuilt if you don't want to tackle it.
Grimm is offline   Reply With Quote
Old 11-08-2006, 08:01 PM   #4
Senior Member
Posts like a Camaro
 
Join Date: Oct 2006
Location: montreal canada NEBF07 ONBF07
Posts: 987
Thanks: 0
Thanked 0 Times in 0 Posts
firebuick is on a distinguished road
Default

pontiac engine have no big block there all the same size from 326 to 455
firebuick is offline   Reply With Quote
Old 11-08-2006, 11:54 PM   #5
PopaDopaDo
True Car Nut
 
popatim's Avatar
 
Join Date: Jan 2005
Location: NY
Posts: 4,957
Thanks: 0
Thanked 0 Times in 0 Posts
popatim is on a distinguished road
Default

He'* right, although they weren't considered small blocks either. They ran in between sb and bb in size.
popatim is offline   Reply With Quote
Old 11-09-2006, 12:13 AM   #6
Senior Member
Posts like a Turbo
 
Join Date: Oct 2006
Posts: 450
Thanks: 0
Thanked 0 Times in 0 Posts
ieatfeets is on a distinguished road
Default

yeah 326 heads on a 455 for compression or the other way around for flow
ieatfeets is offline   Reply With Quote
Old 11-09-2006, 01:33 PM   #7
Senior Member
Posts like a Supercharger
Thread Starter
 
Join Date: Sep 2006
Location: Pittsburgh, PA
Posts: 173
Thanks: 0
Thanked 0 Times in 0 Posts
HurstGN is on a distinguished road
Default

I'll have to verify....I believe it'* a 455. If I can this weekend I'll pull the carb and see what make it is. Last I worked with a carb was an 82 Buick with a computer controlled Quadrajet. An odd bird for sure.

I am mechanically inclined, so I may try the rebuild myself at first. If I fail, then I'll see about the pros. I know of nobody that stands out locally for rebuilding carbs.

Dan McCann
Pittsburgh, PA
HurstGN is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
1972 Riviera dbeast420 Lounge 9 05-21-2006 09:51 PM
Drivetrain Power Loss Formula Sol Performance, Brainstorming & Tuning 26 11-10-2004 12:37 AM
Drivetrain Swap mark2112 1992-1999 6 05-11-2004 06:42 PM
3800 drivetrain question, please help!! h1081dan General GM Chat 14 10-19-2003 02:55 PM
Drivetrain loss? willwren Performance, Brainstorming & Tuning 12 09-17-2003 12:58 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 05:34 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.