Thermoquad Choice
The '75-75 360 has a number of thermoquads listed., Anyone better than the others? Thanks
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Re: Thermoquad Choice
You might want to contact Mike Graham, GTX John or Kenny Etter here on the board,
They all have quite alot of experience with the TQ |
Re: Thermoquad Choice
Since you must run the 1.50" primary TQ, I would recommend the 6138S or 6139S. These are the simplest and run very well. The are from the '72 340 auto or stick application. Jim
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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. |
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
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Re: Thermoquad Choice
I complete agree with you Jim about the difference not being a whole lot. However my oldest boy Robert lost the class final in Vegas Nat's last year by .0001.....he was not happy with me. A few years before I won a Heads Up Round in Denver Nat'ls by .0001. There have been days I would Kill for a hundredth in Class!
John Irving |
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