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carburetor jetting #1007230 06/05/11 04:59 PM 06/05/11 04:59 PM
Joined: Feb 2009 Posts: 1,274 Ontario.Canada C can.al OP pro stock
can.al OP pro stock C Joined: Feb 2009 Posts: 1,274 Ontario.Canada	...main jet .095. ...if you change just the rods from .068 x .047 to .065 x .047 will it richen the cruise,wot, or both?

Re: carburetor jetting [Re: can.al] #1007231 06/05/11 05:11 PM 06/05/11 05:11 PM
Joined: Jan 2003 Posts: 826 Stone Mt, GA. D DEMONSIZZLER super gas
DEMONSIZZLER super gas D Joined: Jan 2003 Posts: 826 Stone Mt, GA.	Not likely enough difference in dia between the two rod sizes to matter much. You would need to go + or - about 8 sizes on a metering rod step to equal one jet size difference.

Re: carburetor jetting [Re: can.al] #1007232 06/05/11 05:14 PM 06/05/11 05:14 PM
Joined: Oct 2007 Posts: 288 Birmingham, England M Mick70RR enthusiast
Mick70RR enthusiast M Joined: Oct 2007 Posts: 288 Birmingham, England	That rod change will richen just the cruise. 1970 Road Runner 505 cid MCH CNC ported Stealth heads MP 528 camshaft 4 speed GV overdrive 11.98 @ 117 on street treads

Re: carburetor jetting [Re: DEMONSIZZLER] #1007233 06/05/11 07:06 PM 06/05/11 07:06 PM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	Quote: You would need to go + or - about 8 sizes on a metering rod step to equal one jet size difference. Dave are 8 sizes in effect(.001" X8=.008") as there's only a handfull of rods in eddy's kits & the're not graduated in thousandths. in other words would going from a .077" cruise step to a .069" b richening it 8 sizes? live every 24 hour block of time like it's your last day on earth

Re: carburetor jetting [Re: Mick70RR] #1007234 06/05/11 07:11 PM 06/05/11 07:11 PM
Joined: Feb 2009 Posts: 1,274 Ontario.Canada C can.al OP pro stock
can.al OP pro stock C Joined: Feb 2009 Posts: 1,274 Ontario.Canada	..so sm step is wot throttle...rod highest,no vacuum ..main body is cruise....think i got it now.

Re: carburetor jetting [Re: can.al] #1007235 06/05/11 07:17 PM 06/05/11 07:17 PM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	Quote: main body is cruise. 3 steps: small "power" tip on the end, "cruise" is next step up that's somewhat larger then the even larger main shank dia up to/including the L bend at the top live every 24 hour block of time like it's your last day on earth

Re: carburetor jetting [Re: RapidRobert] #1007236 06/05/11 09:19 PM 06/05/11 09:19 PM
Joined: Jan 2003 Posts: 826 Stone Mt, GA. D DEMONSIZZLER super gas
DEMONSIZZLER super gas D Joined: Jan 2003 Posts: 826 Stone Mt, GA.	Quote: Quote: You would need to go + or - about 8 sizes on a metering rod step to equal one jet size difference. Dave are 8 sizes in effect(.001" X8=.008") as there's only a handfull of rods in eddy's kits & the're not graduated in thousandths. in other words would going from a .077" cruise step to a .069" b richening it 8 sizes? That is right Robert; The smaller the id or step on the metering rod the richer the circuit becomes. A smaller rod id lets more gas through the jet.

Re: carburetor jetting [Re: DEMONSIZZLER] #1007237 06/05/11 10:36 PM 06/05/11 10:36 PM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	Dave I'm not grasping how 8 sizes diff on a rod dia (.008" right?) equals 1 jet size as I had went from .095"'s to .098's jets on my 1406 (a 3 tho diff). What am I missing? live every 24 hour block of time like it's your last day on earth

Re: carburetor jetting [Re: RapidRobert] #1007238 06/06/11 08:36 AM 06/06/11 08:36 AM
Joined: Jan 2003 Posts: 826 Stone Mt, GA. D DEMONSIZZLER super gas
DEMONSIZZLER super gas D Joined: Jan 2003 Posts: 826 Stone Mt, GA.	It's not the same thing; try tuning with jets vs metering rods with a Carter using both and you will see how this is.

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