Hard start & fuel boiling > Some interesting carb insulating data

[bakerhillpins]

Should I go with the divided type like this or the open one....Shawn seems to think the open one could cause swirling???

I found the same info online but it was in so many words and not directly stated so I am interested in Ron's thoughts on that as well.

[firefighter3931]

Open is fine.....i've run 1in open spacers on dual plane intake manifolds in the past with zero problems related to fuel distribution.  

Most "performance" dual planes (RPM/CH4B) will have the divider partially milled down. This actually helps with fuel distribution and allows both banks of the engine to use all 4 venturies of the carb. The base insulating gasket will accomplish the same thing as an open spacer but to a lesser degree because it is thinner.  

The only application i can see using that divided spacer would be on a stock manifold which is something I would never use  


Ron

[RIDELIKEHELL]

You mean I actually asked a good question  A wealth of knowledge as always Ron 

[firefighter3931]

You mean I actually asked a good question   A wealth of knowledge as always Ron  

Yep certainly a good question  

When you pull the carb have a look   at the divider in your manifold and you'll see why the divided spacer/gasket will have no effect on fuel distribution.  

The designer(s) of those performance dual planes did that for a reason.  



Ron

[RIDELIKEHELL]

Just ordered the spacer from Summit  I remember that about the intake actually when I opened the box back in 2010..thx again  hopefully I will tackle this next week after the parts come in 

[bakerhillpins]

The only application i can see using that divided spacer would be on a stock manifold which is something I would never use  


Ron

Thanks for that Ron!     Since I have a stock manifold that would work for me then.

[RIDELIKEHELL]

Well I ordered the gasket yesterday from Summit Racing and got a notification it was in at my U.S. postal outlet so we went over and picked it up this afternoon   Also hit Autozone and after 5 minutes of going through air filters with my old one in hand I found a STP one that was same diameter but not as tall( a little over a 1/4"). So I am hoping that the extra height that adding the gasket will cause, the reduction in filter height will allow me to use my Mopar Performance Air Cleaner still. I don't have a lot of clearance nowto my hood and needed a base off of a coronet that Shawn had when he was building my car up. One reason I love living near the border is my quick access to parts  

[Steve P.]

Make sure you check your AIR CLEANER STUD height before you drop your hood.. We dented a hood from the inside once that way.. Rotten lesson at best.... 

[RIDELIKEHELL]

Make sure you check your AIR CLEANER STUD height before you drop your hood.. We dented a hood from the inside once that way.. Rotten lesson at best.... 

thx Steve

[RIDELIKEHELL]

My Carb is an 800 CFM..oops...still haven't added the gasket 

[RIDELIKEHELL]

My plugs

[firefighter3931]

My plugs

Marc,

Those are fouled pretty bad ! Time to replace....use an NGK  BCPR-6ES 

The carb and ignition need some tuning 


Ron

[RIDELIKEHELL]

My plugs

Marc,

Those are fouled pretty bad ! Time to replace....use an NGK  BCPR-6ES  

The carb and ignition need some tuning  


Ron

ot the new plugs installed last night but am waiting for my guys to come over thursday night to adjust the timing and carb...I'm new to this but am learniing   They also have a Holley Carb that I can use if need be which is nice.



Marc,

[RIDELIKEHELL]

Got the new Firecore Distributor & coil in with a ton of help from firefighter RON!!!! Didn't put the carb spacer in as I need to put in a new fuel line(it would be too short) but man does the car run nice now! Had a float stick in the carb while testing yesterday and we killed the battery trying to start it. Luckily we were a mile from my place and the wife came to the rescue and we boosting it. I put the trickle charger on it after we got it home till I went to bed. The motor only has 162 miles on it and has sat a lot over the winter and spring. Hopefully get out tonight and run her again! Here's a video of the idle 

http://www.youtube.com/watch?v=7o9gP42OEGU

[RIDELIKEHELL]

  The pic of the car is when it died 

[cougs]

   I need to maintain carb functionality so I don't want to block my heat crossover.   Can a hole be drilled in the pan gasket to let "some" heat in so the choke operates but not so much that it boils the fuel?  Will it eventually just heat it up anyway causing locking issues?   About the only option i have because carb spacers screw up the choke linkage for me.   

[RIDELIKEHELL]

we got the carb spacer installed and will be road testing Monday at the earliest between work and family commitments there isn't  much  time lol

https://www.youtube.com/watch?v=UIauNcB2NgE&feature=youtube_gdata_player

[RIDELIKEHELL]

Car is running great now!!!!

Here are my temps I took after a 30 minute drive

1) cylinder head surface temp : 228*F
(2) Intake manifold surface temp : 126*F
(3) Carb main body surface temp : 111* F
(4) Valley pan surface temp : 156* F

Mind you we live very close to Lake Huron and it was only 60* out last night around 6-7pm


RON IS THE MAN!!!!

[bakerhillpins]

   Great to hear!

I am going to force myself to go through the same over the next week. Going to take the carb with me over my vacation week and rebuild it and then do the valley pan/ spacer upgrade.

[bakerhillpins]

  I need to maintain carb functionality so I don't want to block my heat crossover.   Can a hole be drilled in the pan gasket to let "some" heat in so the choke operates but not so much that it boils the fuel?  Will it eventually just heat it up anyway causing locking issues?   About the only option i have because carb spacers screw up the choke linkage for me.   

A tad late on a response but none the less. Several folks have drilled a hole in the crossover to allow some heat flow. I have heard folks say they have drilled a 1/8" to 3/8" hole.  If you have a stock thermal choke you should just be able to add the spacer and simply bend the arm on the choke to make it the correct height/length.

[jww426]

What carb spacers would you all recommend for the 426 hemi?
thanks
JWW

[jww426]

Anyone recommend phenolic spacers for carter carbs?

Mr. Gasket 3439 - Mr. Gasket Phenolic Carb Spacer

thanks!

[b5blue]

  I need to maintain carb functionality so I don't want to block my heat crossover.   Can a hole be drilled in the pan gasket to let "some" heat in so the choke operates but not so much that it boils the fuel?  Will it eventually just heat it up anyway causing locking issues?   About the only option i have because carb spacers screw up the choke linkage for me.   

A tad late on a response but none the less. Several folks have drilled a hole in the crossover to allow some heat flow. I have heard folks say they have drilled a 1/8" to 3/8" hole.  If you have a stock thermal choke you should just be able to add the spacer and simply bend the arm on the choke to make it the correct height/length.

I drilled 1/8 holes to let some heat in. I found if you do that it just lets the heat burn the valley pan heat blocks away. DO NOT DO IT!

[myk]

For what it's worth, I installed a 1/2 inch phenolic, open spacer and not only has it seemingly eliminated any hot fuel issues, but I felt the car picked up a little muscle in the mid to top end.  I do feel like I lost some low-end though; the off-idle bog I've had since the beginning has gotten worse.  All in all, I agree that a spacer of some sort will help most of us...

[Barfyspitz]

Will a half inch spacer clear the hood on a big block with an m1 intake On a 68?