66 389 Tri-Power - Pontiac GTO Forum
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post #1 of 10 (permalink) Old 04-15-2012, 08:30 PM Thread Starter
 
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66 389 Tri-Power

I know it has most likely been ask before, but i'm new here and new to my GTO. So the question is; does anyone make an aftermarket tri-power intake carb set up or do i need to look for an original, because all i seem to be finding online is rebuilt originals. Thank you.
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post #2 of 10 (permalink) Old 04-15-2012, 09:30 PM
 
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The answer to that is maybe. Ames and PY has them. Ames was waiting on carbs. PY sold me one. Search threads started by me and you'll find the problems I had. I'm happy but minor things can get ya frustrated.


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1966 Pontiac Lemans Convertible
389 tri power
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post #3 of 10 (permalink) Old 04-16-2012, 06:58 AM
 
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There are some excellent re-builders out there also.....I beleive Richard Boneske rebuilds trips. He is a member here and on PY forum. Beautiful 66 by the way!! Eric



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post #4 of 10 (permalink) Old 04-16-2012, 09:48 PM Thread Starter
 
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Thanks guys, you sent me in the right direction. I really want to get the tri set up, but my makor worry, once i get the intake and carbs is setting them up properly. I have read its easy to set them up wrong. Know of any good guides to properly setting them up? THanks again.

Current setup:
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post #5 of 10 (permalink) Old 04-16-2012, 10:11 PM
 
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Not much to it. Set the center carb like any two barrel. Set the progressive linkage to open the front and rear to your liking and drive.

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1966 Pontiac Lemans Convertible
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post #6 of 10 (permalink) Old 04-16-2012, 11:07 PM Thread Starter
 
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awesome, well ill update as i progress. Thanks again. Glad people are so willing to be helpful!
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post #7 of 10 (permalink) Old 04-18-2012, 05:33 AM
 
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The aftermarket intake is questionable , as i have had 3 bad ones 4th. was acceptable . Turn manifold upside down lay intake gaskets on , align to the bolt holes and see what you got . The 1 side was good the other was terrible as the gasket parting line from port / port was into the next port by 1/4" . That is the approx. distance between the ports to begin with , the bolt holes were fine . Most people lay the gaskets on the head , drop manifold from top , done . Line up the gaskets on everything . As for the carbs. make a set of block off plates for the end carbs start engine running off ctr. carb. only . If it runs good then add the end carbs. if starting to run worse end carbs. are pulling air in through the throttle plates , must be sealed or you will have low vacuum etc.
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post #8 of 10 (permalink) Old 04-18-2012, 08:13 AM
 
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If your still looking for a Tri-Power set complete, you could try Greg Spritzer in Painesville Ohio. According to the records I have for my '65, that is where the restorer got my '68 tri-power complete.

As far as I can tell, he is a GM car dealer that used to be a Pontiac supplier as well. I absolultely love the '68 tri-power on my '65.
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post #9 of 10 (permalink) Old 04-18-2012, 09:08 AM
 
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Johnny, I would look for a 1966 tri-power set up for your car. 65 had a bit smaller carb. Originals are around, and so are the parts, and skills to rebuild them. Eric



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post #10 of 10 (permalink) Old 04-18-2012, 09:13 AM
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And with the '66 tripower, inspect the intake carefully around the center carburetor ports. They are prone to crack, due to the choke stove location/application on the '66. A agree, an original '66 unit is probably the best choice for performance and reliability. I've had less issues with tuning tripower's over the years than 4 barrel'c oon these cars. They are a simple, effective system that works very well on stock to medium build cars.
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  Pontiac GTO Forum > The 1964-1974 Pontiac Tempest, Lemans & GTO > 1964-1974 Tempest, Lemans & GTO General Discussion

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