'57 Chevy Rochester Fuel Injection

[Bob Pagano]

look up Gerry Stinner from the Truppi/kilng days he should know a bunch, Ralph did a few back in the day.

[340Cuda]

There was somebody back in the 60s or early 70s that raced a winning Corvette that had the Rochester fuel injections with what we would call today dual throttle bodies on it.

I think he raced mostly, if not exclusively AHRA. I think he was from Texas.

Does anybody remember this car?

[Bob Mulry]

Originally Posted by Jim Johnston/6022

I think Bill Parmenter tried the fuel injection in his 57 super stock years ago without much success. I believe the only difference from 250 hp to 283 hp is camshaft. His nephew Mike is on here sometimes he might know how it ran. My experience is back in the 60"s trying to get one to run properly and i remember high vacuum was needed to make one run decent. With our weird camshafts that would be a challenge.

283/250HP = flat top piston = 9.5 to 1 +/- = .398/.298 lift hydraulic lifter

283/283HP = .122 dome = 10.5 to 1 +/- = .394/.400 lift solid lifter

[Mark Yacavone]

We had a 283 / 250 in a 59 'vert, back in 71. Fell at 15.01 in O/SA
Already superceded } the aluminum Powerglide, the 62 327 smooth top FI unit, ..520 heads.
Very fast car in that year, for a couple of young guys that didn't know much.
Smoothest leaving car I ever drove, until the EFI stuff.
1972, NHRA kicked it into Super/ Stock, and ruined it. Nobody could even tell us what part was the actual manifold, and how it could be modified.
Marvin 2 Speed had an orange 57 wagon with that setup, in 72-73 . Ran pretty fair at the Winternationals. He wasn't real pleased about the situation either, as I recall.

I think it was a little stronger than the 245 combo. But , today, @ 250 hp, out of a 283, I think I'd look at more modern stuff instead.

[shoebox racer]

Originally Posted by Jim Johnston/6022

I think Bill Parmenter tried the fuel injection in his 57 super stock years ago without much success. I believe the only difference from 250 hp to 283 hp is camshaft. His nephew Mike is on here sometimes he might know how it ran. My experience is back in the 60"s trying to get one to run properly and i remember high vacuum was needed to make one run decent. With our weird camshafts that would be a challenge.

Bill did try fuel injection quite some time ago. Thinking mid to late 90’s. It was very consistent, he won a super Chevy show race at Portland with it but was not able to run the index. Dual quads were faster by a bit and carried less horse power. To be fair they were on a tunnel ram with porting and the fuel injection was an untouched original manifold. He might have used the later 327 injectors, memory fails here. Maybe a sheet metal manifold would help? Specific questions might jar the memory so ask if you have any!

Mike

[Biscayne]

I own a 1959 Impala Convertible Fuel Injection car. 283 290h.p. The fuel injection units need 11 inches of vaccum at idle. But you can put as much fuel to them as you need. The air meter flows between 650-700 cfm stock.... i think you could make one work fairly well, but would take some time and dedication.