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Jim Wahl · 01-01-2011, 01:49 PM

Right John, what I meant to say was even though he can run the 1.50" primary I would still recommend the #6138S if NHRA will allow it. That series carb is built most like the competition series carb than the rest of them. I have found on back to back runs that the 1.50" primary is not worth more than .01 or .02 over the 1 3/8" primary carb in the best of conditions. Jim

01-01-2011, 01:49 PM	#5
Jim Wahl Veteran Member Join Date: Jan 2002 Location: Central Florida Posts: 5,844 Likes: 666 Liked 683 Times in 129 Posts	Re: Thermoquad Choice Right John, what I meant to say was even though he can run the 1.50" primary I would still recommend the #6138S if NHRA will allow it. That series carb is built most like the competition series carb than the rest of them. I have found on back to back runs that the 1.50" primary is not worth more than .01 or .02 over the 1 3/8" primary carb in the best of conditions. Jim __________________ Jim Wahl....NHRA #2239 S/SS - IHRA # 8 Stock, D2 Stock Champion (forever I guess) 2019 Baby Gators Stock Champion 2009 NHRA D2 National Open Stock Champion 1982 NHRA D2 West Palm Beach LDRS SS Runner Up Past President, Southern Stock / Super Stock Association. Last edited by Jim Wahl; 01-01-2011 at 01:54 PM.