1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

identifying holley carb

Old Sep 29, 2010 | 10:22 AM
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identifying holley carb

i got this carb it was used on a rx7 with premix, i dont know if its a stock holley carb or a racing beat one, the previous owner told me the omp lines were removed and change it to premix, if its a stock holley carburetor, can i mod it to add the oil lines and how and where do i hook up these lines to the carb?

Thanks all.





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Old Sep 29, 2010 | 10:36 AM
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It's not RB's 465 cfm carb since yours has mechanical secondaries, so it's at least a 650 cfm one. On the throat, the part that sticks up above the filter housing ring, there should be 4 #s, a dash and another #. That's the carb model #. Find it and post it.
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Old Sep 29, 2010 | 12:34 PM
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Originally Posted by trochoid
It's not RB's 465 cfm carb since yours has mechanical secondaries, so it's at least a 650 cfm one. On the throat, the part that sticks up above the filter housing ring, there should be 4 #s, a dash and another #. That's the carb model #. Find it and post it.
it say 9970-3
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Old Sep 29, 2010 | 12:57 PM
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make ur pix smaller next time. and here's a link to pix of my RB holley and how things r done. any other pix u need let me know.

http://s83.photobucket.com/albums/j291/rxtasy/
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Old Sep 29, 2010 | 01:08 PM
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find another number and google it, and its an 450 cfm holley carb, now is there a way to hook up the omp lines to the carb?
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Old Sep 29, 2010 | 01:27 PM
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Originally Posted by rxtasy3
make ur pix smaller next time. and here's a link to pix of my RB holley and how things r done. any other pix u need let me know.

http://s83.photobucket.com/albums/j291/rxtasy/
i like your car, im sorry for the big pics, next time they gonna be normal pics, did you mod your carb to hook up the oil lines like that?
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Old Sep 29, 2010 | 01:32 PM
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9973 is a valid #, 9970-3 isn't. If it is 9973, then it is a 450 cfm. I just noticed the carb never
had a choke, odd.
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Old Sep 29, 2010 | 01:36 PM
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Originally Posted by trochoid
9973 is a valid #, 9970-3 isn't. If it is 9973, then it is a 450 cfm. I just noticed the carb never
had a choke, odd.
sorry i found this other number 9776 near the choke place, i google it and found it was a 450cfm holley wih mechanical secondaries and no choke.

any ideas about how to hook up the omp lines?
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Old Sep 29, 2010 | 02:14 PM
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Holy crap. I used that nipple on the side of the primary fuel bowl for the vac advance. Is it made for the OMP? I have the 4150 wich is 650 CFM. Vac secondary that was converted to mech secondarys. Gotta fix that so i can use it.
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Old Sep 29, 2010 | 06:13 PM
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Originally Posted by pisuicas
i like your car, im sorry for the big pics, next time they gonna be normal pics, did you mod your carb to hook up the oil lines like that?
as far as i know it came from RB with all the necessary things to hook up the omp. engine and all is from an rx4 that a friend had many, many yrs ago. all i had to do is rebuild the engine in order to use it. i had it in an 808 til i wrecked it, now it's living in the 7.
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Old Sep 29, 2010 | 06:16 PM
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Originally Posted by Verneuil
Holy crap. I used that nipple on the side of the primary fuel bowl for the vac advance. Is it made for the OMP? I have the 4150 wich is 650 CFM. Vac secondary that was converted to mech secondarys. Gotta fix that so i can use it.
vac advanced connects to the nipple on the side of the metering plate.
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