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GTX JOHN · 01-01-2011, 07:00 AM

Jim: Those # are both SMALL 1 3/8 primaries I believe...... not 1 1/2 like the 360 are allowed to run.
Not a lot of difference between big and little carbs in performance but we ourselves run a big one on applications that are allowed either size which are quite a few according to NHRA tech specs. We like the 6138 or 6340 on any 340 combination either High or Low Compression and I have a bunch of both.

01-01-2011, 07:00 AM	#4
GTX JOHN VIP Member Join Date: Jun 2009 Location: Boulder City, Nevada 89005 Posts: 2,733 Likes: 2,799 Liked 2,486 Times in 697 Posts	Re: Thermoquad Choice Jim: Those # are both SMALL 1 3/8 primaries I believe...... not 1 1/2 like the 360 are allowed to run. Not a lot of difference between big and little carbs in performance but we ourselves run a big one on applications that are allowed either size which are quite a few according to NHRA tech specs. We like the 6138 or 6340 on any 340 combination either High or Low Compression and I have a bunch of both.