Barracuda Challenger Forum

Author Topic: Boiling fuel and intake swap  (Read 131 times)

Offline rattlesnake

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Boiling fuel and intake swap
« on: June 10, 2017 - 11:55:16 PM »
Finally figured out the cuda is boiling the fuel after long drives on hot days. I currently am running a Wiend team G aluminum manifold with a Holley 850 carb. I was told by RPM racing in Indianapolis the motor is heat sinking after shut-down causing fuel to boil in the carb, which causes hard re-start. They said I need a special type of spacer between the carb and intake which does not transfer heat from the intake to the carb. The problem is with the mid rise intake I don't have room for a spacer so I need to change the intake to free up some space. Does anyone have any suggestions for a low rise single plane intake for a moderately modified 440? It has 10:1 compression, comp cams thumper cam hydraulic lifters, 2" headers, 3500 stall. If any more info is needed I can give it. Suggestions will be appreciated.
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Offline cudabob496

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Re: Boiling fuel and intake swap
« Reply #1 on: June 11, 2017 - 12:45:29 AM »
I had 3/8 inch milled off my M1 single plane to fit spacer.
Insulate your fuel lines. Route them away from heat.

Make a heat shield for your carb.
72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.
Up to 4000 RPM, Warp Speed, Up to 5000, Rediculous Speed, Up to 6000 RPM, Ludicrous Speed!

1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"

Offline cudabob496

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72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.
Up to 4000 RPM, Warp Speed, Up to 5000, Rediculous Speed, Up to 6000 RPM, Ludicrous Speed!

1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"


Offline Racer57

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Re: Boiling fuel and intake swap
« Reply #3 on: June 11, 2017 - 09:32:13 AM »
I taped 2 layers of Reflextic together and placed it under my 383s intake on top of the valley pan and it helped.

"Every time one of these start, (Dual Quad Hemi) a Prius dies" Mark Worman

Offline dodj

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Re: Boiling fuel and intake swap
« Reply #4 on: June 11, 2017 - 09:38:17 AM »
I don't know if it is a shorter manifold than the Weiand, but I like my Holley Street Dominator single plane. I bought it after several recommendations from forum members. Give it a look. :2cents:
Scott
1973 Challenger  440 4 spd 
2007.5 3500 6.7 Cummins Diesel, Anarchy tuned.
Good friends don't let friends do stupid things. ........alone.


Offline cudabob496

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Re: Boiling fuel and intake swap
« Reply #6 on: June 11, 2017 - 11:51:50 PM »
vent engine compartment to keep it cooler. Place sheet metal shields
over exhaust manifolds. Coatings on headers help a lot. Coat inside and outside
of header.
72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.
Up to 4000 RPM, Warp Speed, Up to 5000, Rediculous Speed, Up to 6000 RPM, Ludicrous Speed!

1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"