Building up a 283(.060 over), 11:1 domed pistons, 30/30 solid cam, 461 fuelie heads, 1.5 roller rockers, TorkerII intake and a 750 holley.... It's going in my 56' Chevy, with a M-20, and not alot of gear. Do you think the 11:1 will be ok? I run half AV gas half 93 now, and the car runs great. Will the high compression kill the cruise factor?
You should be golden, not sure what the overlap is on the 30/30 cam but if you are mixing the 93 and the high octane it should be okay, whatever it should be fun!
In that heavy a car you might be unhappy. My T roadster had a 283 with 11.5:1 pistons, solid lifter cam, and single Rochester 4bbl. Ran great on regular gas with no ping or rattle. BUT I attribute its perfromance to the light load, automatic transmission and relative narrow 8.20-15 ties.
I had a 327-331 SBC with 13:1, Holley 3brl and Fuelie cam and heads. This was in a 63 Corvette in 1971.The car was hard to start and had to go to a Taxie battery. The car ran good but in the end I had to go to a 456 posi rear.Gosh those were the days when I could fry the tires ( Firestone wide ovals) thru three gears!!!!!.I don't think 11:1 in your case would be too bad. Tom ( Tired Old man)
NJ1956-- Years ago a a friend had 1966 chevelle almost the same comb that you have on your 292 we ran the 180 corvette hi rise a 3310 780 vac sec But we HAD a 456 GEAR it was SCREAMER.
I think it all depends on how much "on the street" driving you intend to do. Needing half av gas to run means that you most likely won't be able to get more than half a tank away from your home base. Not every airport has a fuel dealer who will sell gas to guys driving in in their car. If you can live with that limitation and the trouble and extra expense why not? For me it wouldn't work as almost 75% of the events I like are well over half a tank of gas away no matter what gas I might use. But from what I've seen cars like that with big thumpy thumpy engines these days are almost always trailer queens anyhow. Tow to the motel in the event town, unload and thump over to the event, thump back and back on or in the trailer. As for myself and since I don't race anymore (at least seriously every week) I want an engine that can live and be happy on pump gas so when I want to jump in the rod to go somewhere my only worry about gas is finding the station with the brand I prefer. I had a 57 panel in the mid 70's with a 327 with 12.5 Jahns pistons, Engle solid lifter cam and 2.02 heads with an early Corvette 2-4 setup. About 5 mpg and only the best premium which was a lot better than you can find now. It was a beast though. I wouldn't even attempt to drive that setup on the street now.
Keep your gear deep like the Raven said, and add to that keep it cool. The cooler it runs the less octane it will operate on. My 355 is about 11.5:1 and its been my daily for somewhere in the neighborhood of 130-140k. I do have aluminum heads so my octane requirements aren't as high as yours would be but I'm running on pump gas so you should be golden with your mix.
Right now, I'm only mixing in av gas for the "smell"!! Current motor is a 350(.060) Crower solid roller cam, 2.02 heads, a Victor Jr intake and 750 Holley. Was going to take it out in favor of this 292 screamer but, now I'm thinking about my 68' Nova project....that 11:1 292, with a powerglide, and 4.10's would be an awesome street strip car!!!
Half hi way driving and half around town. Furthest I might go is a half a tank away. I do have a late 56' 283 block, crank and rods that I might just through together with a Duntov 097 cam and 2x4's for the period correct motor thing I'm going for. Or just leave it alone and go on more 1/2 tank away drives!!!
The 780 with vacum secondaries was a good combo? I have one, needs a rebuild but, wouldn't take much. I'm using a TorkerII intake. It's a medium rise single plane...
There are to many varibles i would start out with what you have and make small changes there is a lot good info on this POST.
Had an 11-1 283 +.030 in my '61 Impala ragtop around '66... 3.70 rear, 3 speed and the 30-30 cam. Couldn't afford a four barrel nor anything but stock exhausts... sounded faster than it was.
93 and high-octane? Around here 93 is high-octane. Anything higher requires a 55 gallon drum, and a pickup ride to the next town over. You might need close to 100. I have a customer with a M-Code 4V 351C (11.0:1) in a Cougar. It knocks like bricks in a cement mixer on anything under 100, and under heavy load, even with 100.
Convert the Carb and run it on e85 - you'll be golden! Way cheaper and easier than mixing gas. But only if e85 is available at the pump in your area.
Convert the Carb and run it on e85 - you'll be golden! Way cheaper and easier than mixing gas. But only if e85 is available at the pump in your area.
Forgot to add that the Corvette would only run on Sunoco 260 gas.Now have I dated myself or what. Tom ( Tired Old Man)
There is an airport at the end of town, and they are cool with the hot rodders buying right from the pump. I think Delaware is the closest place to get e85!
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