Thermoquad in action, video

[70GS455]

This is a video of a dyno test of a 6322 850 cfm on a 482 BBB. Can anyone spot the obvious mistake regarding the rear air door? We were also getting fuel from the squirters that has been since resolved.

 

[GTX JOHN]

Air door too open = Way too open if it has 131 jets
it shows on door! Not enough tension on Air Door
spring.

Is check valve leaking and pump squirters dribbling?

That is all I see until I can find my reading glasses?

 

[Geoff 2]

Rear door.
The small plate that covers the air bleeds is missing. The driver's side one also acts as a stop for the air valve at WOT. Removing the choke is a good idea, but I would braze a small piece over the hole left in the AV. That is what I do.

 

[70GS455]

Air door too open = Way too open if it has 131 jets
it shows on door! Not enough tension on Air Door
spring.

Is check valve leaking and pump squirters dribbling?

That is all I see until I can find my reading glasses?

Yes. We were pulling alot of vacuum during the tests. I believe the suction was just drawing fuel past the check valve. We first put a spring on top of the check valve which stopped it but we lost the squirt function. So later I bought some CS squirters which fixed everything.

 

[70GS455]

Rear door.
The small plate that covers the air bleeds is missing. The driver's side one also acts as a stop for the air valve at WOT. Removing the choke is a good idea, but I would braze a small piece over the hole left in the AV. That is what I do.

Good eye. I eventually want to keep an operating choke but we were just testing without it.

 

[Geoff 2]

The reason I braze a cover over the hole is this: it is normally covered over by the choke linkage. Removing the linkage leaves a hole for air flow, which I thought may create a bog. I hope in a few days to have some pics of the discharge tube mods, which I will post.

 

[70GS455]

The reason I braze a cover over the hole is this: it is normally covered over by the choke linkage. Removing the linkage leaves a hole for air flow, which I thought may create a bog. I hope in a few days to have some pics of the discharge tube mods, which I will post.

For testing purposes I have a piece of monster duct tape covering that hole

 

[Jonas Nordstrom]

Yes. We were pulling alot of vacuum during the tests. I believe the suction was just drawing fuel past the check valve. We first put a spring on top of the check valve which stopped it but we lost the squirt function. So later I bought some CS squirters which fixed everything.

"CS squirter" ?

 

[70GS455]

"CS squirter" ?

Competition Series. They are different

 

[Jonas Nordstrom]

Competition Series. They are different

Interesting, Ive got a CS TQ on the shelf, have to check.

 

[70GS455]

Interesting, Ive got a CS TQ on the shelf, have to check.

They have an open area which acts as a vacuum break

 

[Geoff 2]

The CS pump squirter is similar to the squirter used on Carter AVS chrys carbs. Also has the vac break.

 

[GTX JOHN]

Seems like I remember the CSs is about 37 and the regular is about 28.

I could tell you exactly 50 years ago!

 

[Geoff 2]

John,
I was not referring to the nozzle hole size, if that is what you are referring to. I was referring to the design/shape of the CS & production carb pump nozzle; completely different.

 

[Geoff 2]

I have been able to load a pic of the mod mentioned in post #6. I have missed the top hole in the rt side tube. It should be soldered shut like the rest. Note the tubes have the bullet ends cut off just behind the rounded ends [ leave tubes as long as possible ]. Note also the cut off angle; not as sharp as the CS TQs. Use 143 jet as a starting point.