Friend of mine threw a connecting rod through his oil pan. the engine was somewhat hopped up, im not sure about the crank..he spun it up to 6,000 RPM (if not more), in my opinion thats a bit high.. also, my stock 350 in my 77, shifts around 4200 RPM?..is that the redline or what would you guys consider the redline in a small block chevy
2006-11-20 16:05:31 · 7 answers · asked by red77chevy350 4 in Cars & Transportation ➔ Car Makes ➔ Chevrolet
every time i rode along with him he did..so id ont know if it was every day, but it was too dang often
2006-11-20 16:30:57 · update #1
There are alot of things that factor into this question. What kind of piston? Hypereutectic pistons on average weigh up to 12 grams less than a standard cast aluminum. What kind of rods? Chevrolet offers both a 5.7" rod and a 6" rod in a smallblock, obviously, the 6" rod would be more rotating weight. There's about 300 other factors I'm not even mentioning here, but my '76 Vega has a 377 in it (400 block, 350 crank) and it turns 7200rpm before the shift light comes on. It just depends on how the engine is built and maintained.
2006-11-21 10:50:29 · answer #1 · answered by chevytuf76 2 · 0⤊ 0⤋
Depends on (more than) a few variables. Cast crank, or forged? Steel pistons, or aluminum? Is the engine balanced? How well? 4-bolt mains or two? Compression ratio?
A small block Chevy can be built to rev to 7000 or 8000, but you probably couldn't afford it. For a stock engine, 5000 really is about the practical limit, and I don't think I'd want to go there too often. Any higher and you're inviting catastrophic failure.
2006-11-21 00:33:08 · answer #2 · answered by kensval 2 · 0⤊ 0⤋
It all depends on how you set-up your engine and what quality of parts you use. We have built Short Stroke 327's that turned 10,000-11,000RPM. The one I have now max.power is at 6,100 RPMs. It's a Vortec 355cid,440HP,478 ft.lbs.of torque.
Your Redline is at the top of your power band. Not really how high you can turn your engine! It's not a diesel with a governor. You should always Dyno a engine you build for any kind of racing.
2006-11-21 03:14:01 · answer #3 · answered by corvettejohn86@sbcglobal.net 1 · 0⤊ 0⤋
NASCAR motors run at around 9000 RPM, so that gives you an idea what CAN be done with them.
There's no point in trying to rev YOUR engine past 5000RPM, as the H/P starts dropping of by then in most "stock" or slightly modified s/b's
Winding it up to 6000RPM is just a waste, but it shouldn't blow, unless he was low on oil, or doing it on a daily basis.......was he??
2006-11-21 00:29:39 · answer #4 · answered by Trump 2020 7 · 0⤊ 0⤋
6000 doesn't seem too out of line for short bursts. I used to take mine up to 6500 when I had my hotter cam in. It got such lousey milage though that I finally switched to a stock one. The bottom ends will usually take that pretty easily once in a while. The fact that his went out tells me that he either did it a lot and held it there, or his bearings were starting to go out, and they finally did in a big way.
2006-11-21 16:25:57 · answer #5 · answered by sethle99 5 · 0⤊ 0⤋
For your yr of motor you need to do a compression check . If it is8.5-1 you get 180 hp shifting at 4000rpm.Max torque is at is at 2400 rpm with 270 ft lbs of torque. If it's 9.0 -1 compression you get 210 hp at 5200 rpm. You get 255lbs of torque at 3600 rpm
2006-11-21 22:10:13 · answer #6 · answered by Anonymous · 0⤊ 0⤋
Chevy considered the red line to be 5500 but they didn't expect people to be going that high for normal driving.
2006-11-21 01:02:18 · answer #7 · answered by monte 6 · 0⤊ 0⤋