Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - 6 Motorcycle carbs on my Pontiac OHC 6... any ideas?
View Single Post
  #15 (permalink)  
Old 02-08-2012, 10:34 PM
2x4 Barrels 2x4 Barrels is offline
Registered User
Last photo:
Join Date: Jan 2012
Posts: 43
Wiki Edits: 0

Thanks: 0
Thanked 2 Times in 2 Posts
2x4`s can help

Hi Chrisinestes

I love this idea.Ok let`s start first off your ponti is 38.3 cubs per cyl.A 500cc engine is 30cdi.A motorcycle engine will run at almost 2x the R.P.M. of the ponti.So I think 200-250 singel carbs will work real well.If you can get some used quad carbs that match you will have way more cfm than a stock engine can use.The impornt thing is that are mounted at the same angel of the engine that they came from. Most quads have acc. pumps in the carbs and you can pin drill the distcharge nossile to just the right size.Normaly opening the hole .003 at a time and testing till it is just right.Also most have cables so making a pull block should be simple.Low speed jeting will be the challange as most low speed jets are .015 to .021 so wonce again you will be drilling I am thinking .035 to be a good starting point.If drilled incorrect no big deal soder closed and start again.You should have someone around with some carb know how to help with the tuning.This will be the hardest part of the job.The rest is simple like the guy`s have told you will need a pressure regulator.If You can make the manifold you can easly do this job. GO For IT

Attached Thumbnails
Click image for larger version

Name:	Aug08007.JPG
Views:	236
Size:	139.6 KB
ID:	62806   Click image for larger version

Name:	Aug08009.JPG
Views:	220
Size:	96.1 KB
ID:	62807  
Reply With Quote