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Tuning info when adding a 1 in carb spacer? #1293923 08/29/12 07:45 PM 08/29/12 07:45 PM
Joined: Feb 2012 Posts: 394 Ohio M moparjoe360.4 OP enthusiast
moparjoe360.4 OP enthusiast M Joined: Feb 2012 Posts: 394 Ohio	I'm thinking of adding the 1 inch carb spacer I bought at the beginning of the race season. My question is how much will it effect my tune, will I need to make jet changes? I run a mild 360 with a .454 lift hydraulic cam Edelbrock Preformer 318/360 and a 650 spread bore double pumper Holley. I need it ready and still consistent for Norwalk Last edited by moparjoe360.4; 08/29/12 09:36 PM.

Re: Tuning info when adding a 1 in carb spacer? [Re: moparjoe360.4] #1293924 08/29/12 11:23 PM 08/29/12 11:23 PM
Joined: Nov 2004 Posts: 1,745 Maryland 340_Dart top fuel
340_Dart top fuel Joined: Nov 2004 Posts: 1,745 Maryland	Go up 4 squirter sizes and 10 jet sizes... Just Kidding! We all know that every combination is different and has different needs. A test and tune is the only way to see what the spacer does/changes your tune. If your car is currently consistent, leave it alone for Norwalk...

Re: Tuning info when adding a 1 in carb spacer? [Re: 340_Dart] #1293925 08/30/12 12:16 AM 08/30/12 12:16 AM
Joined: Jun 2007 Posts: 103 NEW JERSEY BIGSPEED member
BIGSPEED member Joined: Jun 2007 Posts: 103 NEW JERSEY	The answer lies in dyno and track testing with wideband o2,Way to many variables to accept an internet answer as gospel.Bill C. Ceralli Racing Engines & Checkered Flag Machine Racing engines , CNC porting & induction development http://www.checkeredflagmachine.net/

Re: Tuning info when adding a 1 in carb spacer? [Re: BIGSPEED] #1293926 08/30/12 07:06 AM 08/30/12 07:06 AM
Joined: Jul 2012 Posts: 429 Washington skrews mopar
skrews mopar Joined: Jul 2012 Posts: 429 Washington	Quote: The answer lies in dyno and track testing with wideband o2,Way to many variables to accept an internet answer as gospel.Bill C. X2

Re: Tuning info when adding a 1 in carb spacer? [Re: moparjoe360.4] #1293927 08/30/12 09:38 AM 08/30/12 09:38 AM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Cant say but it would matter if its a 4 hole or a open one... the 4 hole keeps the velocity up in the carb with a small gain in plenum volume where the open one tends to just increase plenum volume

Re: Tuning info when adding a 1 in carb spacer? [Re: moparjoe360.4] #1293928 08/30/12 11:31 AM 08/30/12 11:31 AM
Joined: Oct 2007 Posts: 4,206 New York polyspheric master
polyspheric master Joined: Oct 2007 Posts: 4,206 New York	In general: Richer idle mixture More PVCR May want 2-4� more idle spark Boffin Emeritus

Re: Tuning info when adding a 1 in carb spacer? [Re: polyspheric] #1293929 08/30/12 06:41 PM 08/30/12 06:41 PM
Joined: Feb 2012 Posts: 394 Ohio M moparjoe360.4 OP enthusiast
moparjoe360.4 OP enthusiast M Joined: Feb 2012 Posts: 394 Ohio	I know I can't base it all off what someone else says, I'm just lookin to see what everyone's opinion is n go from there. The spacer is an open one. I use to run a square bore carb on the same intake with a 1 inch adapter and it seemed to have a little more topend pull. That's why I'm kickin around the idea of adding it before Norwalk Last edited by moparjoe360.4; 08/30/12 06:46 PM.

Re: Tuning info when adding a 1 in carb spacer? [Re: polyspheric] #1293930 08/31/12 11:46 PM 08/31/12 11:46 PM
Joined: Oct 2003 Posts: 7,506 Az Crizila master
Crizila master Joined: Oct 2003 Posts: 7,506 Az	Quote: In general: Richer idle mixture More PVCR May want 2-4� more idle spark and maybe a size larger on the squirters. Fastest 300

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