#41  
Old 07-11-2020, 08:20 PM
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Yes, that is a '67 intake with the heat chamber/crossover that wasn't used in '66.
As suggested you should be able to block it off with a steel shim/gasket.

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Last edited by Jeff Hamlin; 02-26-2024 at 07:16 AM.
  #42  
Old 07-11-2020, 08:44 PM
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Would it be better to block it off from the bottom of the intake? Between the two manifolds?

And, if it was made this way, what kept this from overheating all carbs?

  #43  
Old 07-11-2020, 09:25 PM
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Looking again at your pic of the carb it appears you have a '67 carb.
If so are you using a '67 base gasket?

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Last edited by Jeff Hamlin; 02-26-2024 at 07:16 AM.
  #44  
Old 07-11-2020, 09:35 PM
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Yes, and this is what it did after 5 or so minutes.
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  #45  
Old 07-11-2020, 09:38 PM
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Quote:
Originally Posted by 66sprint View Post
Let me know if you need a different manifold set. I have a few and am in Arlington.
What did yours come off of?

  #46  
Old 07-12-2020, 07:32 AM
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This passage is a Factory design for cold start.
What condition is the Exhaust Heat Control Gate/Valve?

Seems/Looks like it may not be opening up upon warm-up.

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When I die, I want to go peacefully like my grandfather did, in his sleep.
Not screaming like the passengers in his car.

Last edited by Jeff Hamlin; 02-26-2024 at 07:16 AM.
  #47  
Old 07-12-2020, 09:21 AM
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I have a few different sets. For sure some 66 sets.

  #48  
Old 07-20-2020, 08:54 AM
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After blocking off the exhaust ports in the intake we got it to run long enough to do the break-in!

https://www.youtube.com/watch?v=Bif5sbllGMM

  #49  
Old 07-21-2020, 06:19 PM
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Jeff is right on point about the valve in the front 1/2 of the manifold.
If you can’t get it to work right with the bimetallic spring you might be able to remove it Or wire it in the open position.

  #50  
Old 07-22-2020, 08:38 AM
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The valve was not working correctly even before we got it running, so the spring has been removed and the valve hung in the open position. The combination of that and blocking off the exhaust crossover in the intake has made all the difference in the world.

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Old 07-29-2020, 09:06 AM
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After figuring out that two of the followers were made wrong and hanging both the intake and exhaust valves open on #2 (and fixing that issue) it's now hitting on all six and running great! Finally took it for a spin last night and, while there's still a little timing work to be done, she's a strong engine. Couldn't be happier with the end result thus far! It's been one hell of a journey but totally worth it in my opinion

https://www.youtube.com/watch?v=-P2V3EL2WaA

  #52  
Old 07-29-2020, 10:51 AM
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Neat Project.
Just curious as to what do you have planned for the rest of it?

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66 GTO Nostalgia Super Stock/Street Legal Car
421 CID, stock block, Wenzler Intake, 2- Carter 750 AFB's, 3.90 Gears, Full Factory Interior, Full Exhaust, Stock Suspension 3750LBS 9.77@136.99
Multiple NSCA/NMCA World Champion

66 GTO 389 3x2, 4 speed, 4.33 gear, Montero Red 33K original Miles
67 GTO 2dr Post, 428, Tri Power, 3.55 Gears
80 Trans Am Black SE Y84 W72 WS6
  #53  
Old 07-29-2020, 05:49 PM
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That sounds great...glad you got it running right.

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Old 07-30-2020, 10:32 AM
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Mike, the eventual plan is to clear coat the exterior and completely restore the interior. Other than that, just drive it and have fun

  #55  
Old 07-31-2020, 06:22 AM
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Cool


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When I die, I want to go peacefully like my grandfather did, in his sleep.
Not screaming like the passengers in his car.
  #56  
Old 01-08-2021, 01:21 PM
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Well, been a while... I've got about 2500 miles on the engine now and decided to install a Holley Quadrajet Sniper system on it. I'm still getting the kinks worked out of the system but, all in all, it's working well now. I'll get some pics uploaded this weekend.

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  #57  
Old 01-08-2021, 02:42 PM
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cool...waiting for pics

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Old 02-27-2021, 12:36 AM
Baron Von Zeppelin Baron Von Zeppelin is offline
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Just caught onto this unique build. Really Cool

Tough break on that 67 Intake / Exhaust Pre-Heat
1 year only , and was even used on 67 GTO V8 engines.
SS plate from the factory on them. Some carbs have had meltdowns and warpage when the SS was discarded, or unknown it was needed going back from scratch.

What kind of transmission is in the car ?
Pontiac radio still in it ?

  #59  
Old 03-03-2021, 09:17 AM
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63Bomb
How is the Holley EFI working for you?
Any difference in power?
Let me know if you need a cover for the cam sprocket.

  #60  
Old 05-27-2021, 03:05 PM
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It's been a while guys... The car was down for a couple months while I searched for a transmission (after blowing mine up). Ended up going back with another Powerglide because I found a killer deal on a rebuilt unit. @Baron: yes, the Pontiac radio is still in it and I figured out a way to open it up and stuff modern guts into it, so it's now a bluetooth radio that looks totally stock.

66 Sprint: I finally got the EFI system to work really well. Straight out of the box it had some pretty big issues (some were actually mechanical issues do to shoddy shipping), but after a lot of tinkering and time on the Holley forums I've got it running really well. Much better than it did with the Quadrajet on it. It'll smoke tires all day long! Here is the one pic of the unit that I've got with me. This is in the process of wrapping the harness in Faraday tape then covering that with cloth harness tape.

More to come...
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