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#1
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Q Jet on a 327, question by newcomer
Hi!
I´m new to the forum and also new to the world of v8:s as well. Just bought my first one, a 1966 Nova Stationwagon, a real beater. I have been restoring and repairing old 60s Volvos before (I´m a Swede), so everything is a bit new to me in this area. It has a header equipped 327 that I belive came from a circa ´68 Nova. The 2 barrel Rochester 2 Jet that is on it has bad mileage and gives little power, I almost got beaten by a ´88 toyota at the stoplights last week! I belive the rest of the engine is in OK shape. Yesterday I was given (YES!) a smog 350 from a ´79 Chevy Van by a friend of mine, and my questions are: - Does the aluminum 4 barrel intake fit my 327? - Does the Carter Quadrajet carb work with my 327, or should I stick with the old Rochester? I´m after better mileage and, if possible, more HP. |
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#2
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re: Q Jet on a 327, question by newcomer
The q-jet is acually a rochester but but yes the small block intakes are all interchangeable. A 4 barrel q-jet will give quite a boast in power and as long as you keep you foot out of it, it should give pretty comprable possibly better fuel miliage as the 2 barrel. A 79 intake will be a pretty restrictive smog design but it will still be quite an imporvement.
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#3
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re: Q Jet on a 327, question by newcomer
Thanks!
OK, the intake is a bit restricted. I guess that means that is has narrower ports? That is OK with me ´cause I´m after torque and ecomomy instead of a high rpm engine. There was also a cast iron intake that came together with the engine. Is this probably an older (better) item? I have to check the ID number on it tomorrow... |
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#4
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re: Q Jet on a 327, question by newcomer
Carter actually made Q-jets too, saw one in person back in the 70's.
The Q-jet will give better gas milage than the two barrell. Sometime in the late 70's or early 80's the bolt angle on the intake/head changed. The intake bolts may have to be elongated to screw in. Someboby help me on this one?? Have fun, Vern |
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#5
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re: Q Jet on a 327, question by newcomer
I´ve done my homework now, and here are the numbers for the parts:
Carb: Carter Quadrajet, 170 572 13, 1517 AWP. It´s from a 1975 Chevy as far as I can tell from the code chart at http://www.buickperformance.com/qjet.html Aluminum Intake: 140 144 32. It has the wierd little emissions thing outlet next to the termostat housing. Came with my Q-jet carb. Iron Intake: 346 250, 11. It doesn´t have the outlet next to the termostat mentioned above. It has a "spring" next to the carb at the passenger side of the intake. Probably for the choke on some other carb. -So... what intake to use? The ports are the same size as far as I can tell. -The Q-jet is a smog item for a 350, it´s probably a bit lean for that engine. Is it possible that the jetting will be in the right ballpark for my stock 327? |
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#6
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re: Q Jet on a 327, question by newcomer
the lil pasage on the side is probly for an egr valve. the "spring" is the old choke linkage for a manual choke carb, re jetting should fix the lean issue, but you may want to see if some one with a lil more than 2 years experiance with these things answeres.
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#7
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re: Q Jet on a 327, question by newcomer
From what I hear, the stock aluminum intake manifolds were prone to thread-stripping, warping, & cracking. I think I would prefer the iron one, but if the aluminum one is working OK now, I'd give it a try. You already have a good exhaust system, so the 4-barrel should be a major improvement.
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