#21  
Old 05-13-2020, 09:01 PM
242177P's Avatar
242177P 242177P is offline
Ultimate Warrior
 
Join Date: Oct 2004
Location: Vancouver, BC
Posts: 1,709
Default

Quote:
Originally Posted by gtospieg View Post
242177P...Was the GTO sold in Canada sold with a small block Chevy?
Nope. There was a Beaumont (essentially a Chevelle with Pontiac styling cues) and the GTO.

  #22  
Old 05-15-2020, 10:25 AM
ericisback's Avatar
ericisback ericisback is offline
Member
 
Join Date: Mar 2007
Location: Louisville, KY
Posts: 89
Default

So this car:

https://www.ebay.com/itm/353077192807

is a 1966 with a 400 and tri-power.

From what you said, the 66 only came in a 389, and would the tri-power set up for a 400 be different than a 389 (different intake, etc.)?

__________________
1965 Buick Riviera GS
1965 GTO Tri-Power convertible
1965 Jaguar XKE Series 1 Coupe
1967 Corvette L68 convertible
1967 GTO 400 convertible
1968 Camaro 396 SS/RS convertible
1969 Plymouth GTX 440
1969 Mach 1 R-Code Cobra Jet
1970 Olds 442 W-30
1970 Buick GS 455 Stage 1
1970 Dodge Super Bee Hemi
1978 VW Beetle convertible
2011 Mercedes SLS
2013 Jeep Wrangler Rubicon
  #23  
Old 05-15-2020, 11:38 AM
SR-71 SR-71 is offline
Chief Ponti-yacker
 
Join Date: Sep 2010
Posts: 709
Default

400 never had a Tri-Power and first year for the 400 was 1967 in a GTO.

  #24  
Old 05-15-2020, 12:40 PM
64-3Deuces's Avatar
64-3Deuces 64-3Deuces is offline
Senior Chief
 
Join Date: Mar 2017
Location: MIdwest
Posts: 334
Default

Quote:
Originally Posted by ericisback View Post
So this car:

https://www.ebay.com/itm/353077192807

is a 1966 with a 400 and tri-power.

From what you said, the 66 only came in a 389, and would the tri-power set up for a 400 be different than a 389 (different intake, etc.)?
The listing clearly states that the engine is a later model 400.

A 389 tripower (TP) can be used on any size engine (I think the 301 may be an exception) as long as it matches the heads; 64 and earlier TP must be used with 64 and earlier heads and the 65 & 66 TP is used with 65 and later heads. TP was also used on the 421. The TP option ended at the end of the 66 model year so there is no “400 TP”, just bolt-on retro fits.

I suggest you do a search for Pontiac TPs to answer your questions. There are numerous sites that detail various years TPs and their applications and differences.

  #25  
Old 05-15-2020, 12:45 PM
unruhjonny's Avatar
unruhjonny unruhjonny is offline
Ultimate Warrior
 
Join Date: May 2004
Location: Calgary, AB, Canada
Posts: 6,235
Default

As mentioned 1967 was the first year of the 400 - which was essentially an update on the 389 (bore increased);

Also at that time GM issued a decree that banned multiple carburetion for the 1967 model year on anything except a Corvette.

I seemed to recall something changed with the intakes right around this time, and a quick google search showed that the intake manifold bolting pattern changed for 1965, so any 1965-1966 Tri-power intake manifold should be able to be made to work with any 1965 & later heads.

The bigger change in top ends was the combustion chamber design which changed in 1967 - the early 1967 & older used a closed chamber design, while late 1967 and newer went with an open chamber design.

At least the seller was honest about the engine size - because externally they are virtually identical - unless you know what to look for.

I would suspect that most people restoring a pre-1967 GTO would opt for tri power, because it was proven to make more power than the AFB that would otherwise be there... and come on, they look cool

__________________
1970 Formula 400
Carousel Red paint on Black standard interior
A no-engine, no-transmission, no-wheel option car.
Quite likely one of few '70 Muncie three speed Formula 400's left.


1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing)
2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs)
  #26  
Old 05-15-2020, 02:22 PM
60sstuff's Avatar
60sstuff 60sstuff is offline
Ultimate Warrior
 
Join Date: Sep 2002
Location: Left Coast
Posts: 2,784
Default

A quick education when looking at Pontiac Engine blocks.

389 = two freeze plugs on each side of block.

400 = three freeze plugs on each side.

Chris.

__________________
1) 65 GTO Survivor. 43,440 Original Miles. “Factory” Mayfair Maize Paint with Black Pinstripe, Black Cordova Top, Black Interior, OEM Numbers Matching Powertrain. Purchased from the Lady that bought it new. Baltimore Built (11A).
2) 66 GTO Survivor. “Factory” Cameo Ivory Paint with Red Pinstripe, Red Interior. OEM Numbers Matching Powertrain. Tri-Power (OEM Vacuum Linkage), Automatic "YR" code (1759 Produced). Fremont Built (01B), with the Rare 614 Option.
  #27  
Old 05-15-2020, 10:47 PM
Barrier Blue's Avatar
Barrier Blue Barrier Blue is offline
Chief Ponti-yacker
 
Join Date: Jul 2002
Location: Lorain, Ohio
Posts: 612
Default

Does anyone know on what date that the last tripower GTO rolled off the line? I've read that tripower was discontinued halfway thru the '66 model year, but never saw a specific date.

__________________
When I'm paid, I always follow my job through...you know that.

http://www.youtube.com/watch?v=Al2b-...eature=related
  #28  
Old 05-16-2020, 12:24 AM
unruhjonny's Avatar
unruhjonny unruhjonny is offline
Ultimate Warrior
 
Join Date: May 2004
Location: Calgary, AB, Canada
Posts: 6,235
Default

/\ I'm not sure where that would have come from;
the GM mandate against multiple carburetion didn't take effect till the 1967 model year;
And assuming that the 1967 model year was like others after it, would mean it actually started around Aug/Sept 1966;
So if the model year is Sept through to July, that means the halfway point for the 1966 model year would have been somewhere areound February 1966.

__________________
1970 Formula 400
Carousel Red paint on Black standard interior
A no-engine, no-transmission, no-wheel option car.
Quite likely one of few '70 Muncie three speed Formula 400's left.


1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing)
2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs)
  #29  
Old 05-16-2020, 12:56 AM
60sstuff's Avatar
60sstuff 60sstuff is offline
Ultimate Warrior
 
Join Date: Sep 2002
Location: Left Coast
Posts: 2,784
Default Tri-Powers go very late into 66

I have several folders of Original Survivors factory equipped with the 3x2s well into July of 1966.

__________________
1) 65 GTO Survivor. 43,440 Original Miles. “Factory” Mayfair Maize Paint with Black Pinstripe, Black Cordova Top, Black Interior, OEM Numbers Matching Powertrain. Purchased from the Lady that bought it new. Baltimore Built (11A).
2) 66 GTO Survivor. “Factory” Cameo Ivory Paint with Red Pinstripe, Red Interior. OEM Numbers Matching Powertrain. Tri-Power (OEM Vacuum Linkage), Automatic "YR" code (1759 Produced). Fremont Built (01B), with the Rare 614 Option.
  #30  
Old 05-16-2020, 03:18 PM
oldgoat16's Avatar
oldgoat16 oldgoat16 is offline
Senior Member
 
Join Date: Oct 2003
Location: N.H.
Posts: 211
Default

Beautiful sprint Jeff! , I found what I believe is a factory air cleaner to a 66 sprint, it has a longer throat to the carb then an AFB has, Jeff what is it worth ? It’s not mint, but not Junk either, thanks mike

Reply

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 09:16 PM.

 

About Us

The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.

 




Copyright © 2017