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#1
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L79 engine differences: 66-67 Nova
To keep from wearing out kwhizz and his inbox, I figured I'd post this out here:
in terms of hard parts, what were the differences between the '66 and the '67 L79 engines in the Novas? [the more specific the better!] |
#2
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Re: L79 engine differences: 66-67 Nova
Engines were the same internaly. However the 67 was rated at 325 HP and had an open air cleaner instead of the dual snorkel.
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#3
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Re: L79 engine differences: 66-67 Nova
Rob,
To add to what 69L78Nova replied, yes, the 66 was rated at 350 HP and the 67 was rated at 325. Both engines internally were the same, IE, they both shared the #151 cam and both were 11-1 compression. Other differences: 66 L79 came with the 490 aluminum intake. 67 had a cast iron intake. 66 came with a 3245 Holley carb. 67 had a Quadrajet. 66 had the chrome opposing snorkle air cleaner. 67 had an open element with chrome lid. 66 came with a 12 bolt rear. I have been told the 67 came with a 10 bolt but I am not sure if this is the case. The optional 4 speed in a 66 was a Muncie. I have been told the 4 speed in a 67 was a Saginaw, but again I am not sure if this is the case. For some strange reason the handful of 67 L-79's that were built were built late in the model year (June 67). I Have never heard a good explanation of why they were not offered in the beggining of the 67 model year, but became available late in the model year. Supposedly only 6 or 7 were built. Hope this helps. Dave |
#4
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Re: L79 engine differences: 66-67 Nova
Didn't the 66's have the 490 aluminum intake like the Corvettes and the 67's have a cast iron unlike the Corvettes until 68?
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#5
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Re: L79 engine differences: 66-67 Nova
All 1967 Novas equipped with 275 or more HP got the 12 bolt rear end.
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Day 2 is Life. |
#6
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Re: L79 engine differences: 66-67 Nova
Thanks so far!
Other than the heat/weight issues, was the cast iron+quadrajet setup negligibly "worse" than the aluminum+holley setup? I would think the open element air cleaner would be better than the closed, chrome version...? |
#7
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Re: L79 engine differences: 66-67 Nova
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Chevy454</div><div class="ubbcode-body">Thanks so far!
Other than the heat/weight issues, was the cast iron+quadrajet setup negligibly "worse" than the aluminum+holley setup? I would think the open element air cleaner would be better than the closed, chrome version...? </div></div> I would speculate that the Q-jet / Iron Intake / Open Element might actually have a slight edge. More carb CFM, Higher Air Cleaner CFM, and I would <span style="font-style: italic">suspect</span> that the Iron intake isn't far behind the aluminum intake in terms of flow capacity. Those "square corner" winters intakes weren't very good, compared to the 302/LT1 manifold or any modern aluminum intake. |
#8
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Re: L79 engine differences: 66-67 Nova
I've driven a stock '68 L-79 Corvette and that felt VERY strong with its original Q-Jet and cast iron intake. Truth be told, I think the Q-Jet has a higher CFM rating than the factory Holleys that came on the earlier L-79's.
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1962 Biscayne O-21669 MKIV/M-22 1962 Bel Air Sport Coupe 409/1,000 |
#9
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Re: L79 engine differences: 66-67 Nova
QJet was 750 cfm, the Holley was 585.
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#10
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Re: L79 engine differences: 66-67 Nova
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: VintageMusclecar</div><div class="ubbcode-body">QJet was 750 cfm, the Holley was 585. </div></div>
I thought the Qjet was a 650 CFM carb. Learn something new every day!
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Looking for the next project. |
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