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#1
08-04-2019, 10:29 PM
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Tripower hodgepodge
Bought a tripower from a fella in my more uninformed days early in my resto and come to find out it has a center carb with #7042114 which is a '72 Chevy application. Is this carb usable on a 389? If so, what jet size should I be using? Any other things I should b checking for? I am trying to tune carb right now and it seems to b idling rich...have the I/M screws probably 3 turns out. Don't feel any vacuum pull through outer carbs.
Thanks
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Resto almost done - 1966 GTO HDTP Tiger Gold (paint code 1-2), black vinyl top and interior, 389 tripower, 068 cam, TH-350/Hughes TC, RA manifolds, 2.5" Pypes exhaust, Scarebird Front Disc, Ralley II's, factory PS, PB, PW, PA, A/C, headrest option. |
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#2
08-06-2019, 12:02 AM
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I'd start wit .064" jets in the center carb--a little smaller if the venturi size of the carb is less than 1.250"
Normally, we set the I/M screws 2 turns out for startup.
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BONESTOCK GOATS '64 GTO Tripower Hardtop (Wife's Car) '64 GTO Tripower Post Coupe (My Car) '99 Bonneville SE Sedan |
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#3
08-16-2019, 05:07 PM
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Thanks Dick...took carb apart againt today and it has 58 Jets...too small? Venturi looks like 1 3/16".
__________________
Resto almost done - 1966 GTO HDTP Tiger Gold (paint code 1-2), black vinyl top and interior, 389 tripower, 068 cam, TH-350/Hughes TC, RA manifolds, 2.5" Pypes exhaust, Scarebird Front Disc, Ralley II's, factory PS, PB, PW, PA, A/C, headrest option. Last edited by dbiggs; 08-16-2019 at 05:13 PM. |
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#4
08-16-2019, 07:48 PM
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.058” is way too small.
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BONESTOCK GOATS '64 GTO Tripower Hardtop (Wife's Car) '64 GTO Tripower Post Coupe (My Car) '99 Bonneville SE Sedan |
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#5
08-16-2019, 08:46 PM
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Ok thanks...so something less than a 64 since the Venturi is 1 3/16"?
Guess I'll b looking at the end carb Jets next.
__________________
Resto almost done - 1966 GTO HDTP Tiger Gold (paint code 1-2), black vinyl top and interior, 389 tripower, 068 cam, TH-350/Hughes TC, RA manifolds, 2.5" Pypes exhaust, Scarebird Front Disc, Ralley II's, factory PS, PB, PW, PA, A/C, headrest option. |
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