Time to go through the carb again. I have 2 rebuildable cores. I didn't realize that the one I've been running on the truck for the last year or so is the larger bore version of the BBD for the 318. Do I rebuild this one, or go back to the one made for the super six with the smaller venturi bores? The truck has been running ok, but not great, and as long as I've got to rebuild the carb-I want to do the best version. BTW-the online Carter BBD manual that I got online here was the best and most detailed I've ever seen. Thanks guys-Mike

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Good gun control is hitting your target repeatedly

The 318 carbs can be made to work on the slant-6, but it's usually easier to make the slant-6 ones work right.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

I'm running a 318 carb on my 170 and I like it. That was the first one I found that didn't require a lot of work to rebuild, and it's easy to adjust.

Did you lose any mileage or gain any performance? Mine seems to be running overly rich, and I couldn't lean it out. I'm wondering if the larger venturi bore with what I'm assuming are larger main jets are the reason for this? It runs okay, but not great.

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Good gun control is hitting your target repeatedly

I think your running difficulties are down to the condition of the particular carb, not the differences between the 318 and 225 versions of the carb.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

Correct me, isn't the 318 the same size as the 225 carb? I have seen the 383 ones are 1 1/2" bore. They don't look anything like the 1 1/4 BBD's.

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'72 Duster 198 stock cam, 3:23's Hookers on jack stands for 8 years in the driveway
'79 Maxivan 360 Offy Qjet Comp RV cam/rusting in the driveway.
93 D350 160HP Cummins Auto Dually Clubcab needs a injector pump
2005 Golden Couch Buick

The throttle plates and bore are the same size (1 7/16) but the venturi on the super six version is smaller (1 3/16?). You can see the difference looking up or down the bore of the carb with the throttle plates opened. I'm assuming that the jets are also a smaller size too. Mike

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Good gun control is hitting your target repeatedly

Well that is interesting! I didn't know that! Nice to know that.

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'72 Duster 198 stock cam, 3:23's Hookers on jack stands for 8 years in the driveway
'79 Maxivan 360 Offy Qjet Comp RV cam/rusting in the driveway.
93 D350 160HP Cummins Auto Dually Clubcab needs a injector pump
2005 Golden Couch Buick

Rug, have you downloaded and read the BBD manual I posted? See here

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

Why heck no!

Didn't know there was one!

I added another "tin top" to my inventriy last week.

Thankss!

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'72 Duster 198 stock cam, 3:23's Hookers on jack stands for 8 years in the driveway
'79 Maxivan 360 Offy Qjet Comp RV cam/rusting in the driveway.
93 D350 160HP Cummins Auto Dually Clubcab needs a injector pump
2005 Golden Couch Buick