Question for 440+6 owners

Sonny · May 24, 2020

I recently added a six barrel to my ‘70 trib rr last month. I went ahead and added the 1/4” wood carb spacers at that time To prevent fuel boiling. I’ve noticed that after an hour of driving in Florida, my center carb is actually cool to the touch! Do six pack/barrel 440s suffer from fuel boiling issues? The outboard carbs get warm but not boiling hot. Thinking about removing the spacers.

davek · May 24, 2020

Sonny my 69 RT charger never had a problem here in S Carolina and it gets smoking hot here. Never had a fuel separator on it either. I just installed a 6 pak on the Bee and I guess I will see this summer. Your setup looks great. :thumbsup:

Sonny · May 24, 2020

davek said:
Sonny my 69 RT charger never had a problem here in S Carolina and it gets smoking hot here. Never had a fuel separator on it either. I just installed a 6 pak on the Bee and I guess I will see this summer. Your setup looks great.

Cool. I guess since the 3 are separated the center carb isn’t affected by secondary bowls and their stagnant hot fuel? Hmm.

Sonny · May 24, 2020

davek said:
Sonny my 69 RT charger never had a problem here in S Carolina and it gets smoking hot here. Never had a fuel separator on it either. I just installed a 6 pak on the Bee and I guess I will see this summer. Your setup looks great.

Don’t tell anyone but those are GM tri-power Holley carbs with mechanical linkage, not vacuum. And they work freaking amazing.

62MAX · May 24, 2020

Ran/run sixpack both big and small block since the early 70's,"never" had any issues of fuel bowling or anything else for that matter,if set up correctly,they work.These haven't been touched in 15 + yrs,runs as it did then.

Sonny · May 24, 2020

62MAX said:
Ran/run sixpack both big and small block since the early 70's,"never" had any issues of fuel bowling or anything else for that matter,if set up correctly,they work.These haven't been touched in 15 + yrs,runs as it did then.

View attachment 954662

Thanks! I think I’ll take them off and give it a go.

tnfastback · May 24, 2020

Getting ready to finish my Six Barrel build. Do the spacers help or are they just a personal choice?? Also the guy who built my carburetors said to use a valley pan that didn’t block the heat riser holes. Does this make a difference in the decision to run spacers.

myk r sanchez · May 24, 2020

Why wouldn't you block the heat risers? Also a wood or phenolic spacer truly helps. With a four hole spacer I have no hot start issues and more torque down low. I'm running a huge 1 inch phenolic and hood clearance is by the millimeters...

wyrmrider · May 24, 2020

center carb is cool due fuel vaporization/ expansion
you can leave the spacers in in florida

Sonny · May 24, 2020

myk r sanchez said:
Why wouldn't you block the heat risers? Also a wood or phenolic spacer truly helps. With a four hole spacer I have no hot start issues and more torque down low. I'm running a huge 1 inch phenolic and hood clearance is by the millimeters...

Blocked mine.

davek · May 24, 2020

Seems everyone does it different ,no spacers ,no blocked heat risers and no fuel separator. But thats just how Ive done my car. All cars are different and it might depend on were you live. Took the Bee out today and it was 87 and humid at 11am today.

66Satellite47 · May 24, 2020

I don't see a choke, so I see not need for a heat crossover, especially in Florida. Don't know why a person would want a hotter manifold.

wyrmrider · May 24, 2020

So you get fuel vaporization in the Winter
Florida and SC guys might get some more HP, (that;s why heated air to the air filter and cold on full throttle)
but get worse mileage and fuel wash of their cylinders at non full throttle

Question for 440+6 owners

Sonny

It’s all fun til the rabbit gets the gun.

davek

FBBO Gold Member

Sonny

It’s all fun til the rabbit gets the gun.

Sonny

It’s all fun til the rabbit gets the gun.

62MAX

Well-Known Member

Sonny

It’s all fun til the rabbit gets the gun.

tnfastback

Well-Known Member

myk r sanchez

Well-Known Member

wyrmrider

Well-Known Member

Sonny

It’s all fun til the rabbit gets the gun.

davek

FBBO Gold Member

66Satellite47

Well-Known Member

wyrmrider

Well-Known Member

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