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12-15-2017, 02:52 PM | #11 |
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Re: Switch to 2bbl
Well you got me thinking, just checked on a 318 mopar in 70 & 69, 70 was 185, 69 - 172. Really, was there that much difference between the two? Hope someone who runs one can chime in.
Sorry if I jumped rails here. Mike The factor for the 70 is 15.32 and the 69 is 16.70. What class are these? Mike Last edited by Coleydog; 12-15-2017 at 05:44 PM. |
12-15-2017, 03:44 PM | #12 |
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Re: Switch to 2bbl
its funny the 318 in 68 is rated higher, even though its the same engine. I am going to asdk the powers that be to get the lower rating on the 68
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12-15-2017, 06:30 PM | #13 | |
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Re: Switch to 2bbl
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12-15-2017, 10:50 PM | #14 |
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Re: Switch to 2bbl
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12-15-2017, 11:11 PM | #15 |
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Re: Switch to 2bbl
Mr Money, It really doesn't matter what the exact number is. Both will run way under.
They run J and K/SA with a 4 bbl ,and R and T with a 2bbl, and you're better off being in R and T.
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12-16-2017, 09:28 AM | #16 |
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Re: Switch to 2bbl
You're not using http://www.classracerinfo.com?? Shame on you!!
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12-16-2017, 10:54 AM | #17 |
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Re: Switch to 2bbl
If you were to get a proper 2bbl camshaft ground how much would it differ from a 4bbl grind? I’m under the assumption that you’d want less duration when you go from a 800cfm q jet to a 350cfm 2bbl. Thought hard about doing this with 350/255 before selling, I didn’t think there’d be much difference in the 69-71 350 going from 750 to 500 cfm but these later engines loose a lot more airflow capability
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12-16-2017, 11:38 AM | #18 | |
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Re: Switch to 2bbl
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12-17-2017, 04:10 PM | #19 |
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Re: Switch to 2bbl
So am I looking at about .5 slower for my 1973 Nova 350/175/287 horse set up? .390/.410 lift cam, good 882 heads, Boburka 207 quadrajet, dish pistons, metric 200 trans with 5.13 rear. Car weighs 3470 in H/SA but would weigh 3418 in L/SA with a 2 barrel setup. I figured it at .90 better minus the .5 tenths loss on a carb swap so overall about .4 tenths better class for my combo? Does this sound right?
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12-17-2017, 04:13 PM | #20 |
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Re: Switch to 2bbl
The index is .85 better and 50 lbs less so about .90 better but car slows up about .5 because of restrictive 2 bbl carb.
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