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#1
06-01-2011, 11:22 PM
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Qjet selection
I'm looking for advice on which of my carbs will better serve my current build?
Carbs: 17058266 17059253 Build: '70 455 YC 0.30 7k3 3 angle valve & mild pocket port '72 stock intake RARE 2.5 manifolds Cam - looking for advice Compression 9:5.1 Any advice would be great Thanks! |
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#2
06-02-2011, 03:01 PM
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Maybe I should add that this is a 4spd build
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#3
06-02-2011, 03:44 PM
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Go to:
http://www.cliffshighperformance.com/ He has a reputation as being THE BEST Q-Jet expert in the field. He comes recommended highly around here, and I plan on buying my Q-Jet from him when it comes time to build my engine.
__________________
1995 Chevrolet Caprice 9C1 - Daily Driver 1980 Buick Century - WIP: Project Dark Horse 1984 Pontiac TRANS AM - WIP: Project War Chief |
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#4
06-02-2011, 03:57 PM
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Thanks for the link. I am planning to buy a kit from him and try to rebuild myself. Im Basically wondering if one of my cores is a better carb than the other for my application?
17059253 vs. 17058266 |
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#5
06-02-2011, 10:11 PM
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17059253 is an 79 Olds carb, like on a 79 TA with 403.
17058266 is a 78 Pontiac carb, so it would be better for your Pontiac engine.
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Steve F. |
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#6
06-02-2011, 11:17 PM
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The 78 Pontiac would be my first choice. Also I have one built with a kit from Cliff.
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Build it fast, build it right, hold On TIGHT !!! |
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#7
06-03-2011, 12:09 AM
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Quote:
__________________
1995 Chevrolet Caprice 9C1 - Daily Driver 1980 Buick Century - WIP: Project Dark Horse 1984 Pontiac TRANS AM - WIP: Project War Chief |
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#8
06-03-2011, 01:20 AM
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Quote:
Im considering buying Cliffs book a kit and giving it a go myself. |
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#9
06-03-2011, 06:43 AM
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Both of those carbs are equal from a performance standpoint, and EXCELLENT units.
In stock form, the 17058266 is a better unit, having a better venting set-up in the airhorn, and improved POE for the secondaries. Those advantages quickly disappear with a few simple modifications as described in our book. One disadvantage to the 266 over the 253, is the large front vent. It requires a matching hole in the air cleaner base and that hole MUST be sealed off to keep dust and dirt out of your engine. If you have a "Shaker" equipped vehicle it's an advantage, as it locates the base and keeps in from turning. I would also point out here, that the 75-79 Pontiac large front vent carbs have a slightly different vent tube location than the 71-74 units. It's offset just a tad and can be a problem when mixing/matching between those years. In any case, we have EVERYTHING you would want to completely/correctly rebuild the carb for high performance use, and can supply the correct tuning parts as well, to take all the guesswork out of the equation......Cliff
__________________
If you can read this, thank a teacher. If you can read this in English, thank a Veteran! https://cliffshighperformance.com/ 73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile), |
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