Which Chevy big-block is the best?
Which Chevy big-block is the best?
10 Most Powerful Production Chevy Big Block Motors
- 454 LS5 390 hp. Chevrolet brought out the 454 Big Block just as the curtain was lowering on the Classic Muscle Car Era.
- 427 L36 390 hp.
- 427 L68 400 hp.
- 427 L72 425 hp.
- 396 L78 425 hp.
- 427 L88 430+ hp.
- 427 ZL1 430+ hp.
- 427 L71 435 hp.
What’s the optimal cruise rpm for a small block Chevy?
Decades ago Jeff Smith and super chevy did a SBC efficiency series that went fairly in depth. Car was a 70-72 monte. Moral of the story was cruise RPM in the range of 1800-2200 worked best for most passenger car builds. I have OT cars with overdrive and drag race gears that do road trips at 3100ish.
What’s the optimal freeway rpm for a small block Chevy?
Some of those guys turn nearly 4k going down the highway. Not to be a post hog, but 3.08s and OD is right on the edge of acceptable IMO. GM loved to do that combo on G bodies, and they just don’t use OD unless it’s on clear highway, and even then it’s kicking out the converter for everything.
What are the ideal rpms at highway speeds?
That seems high. 2400 – 2600 isn’t bad. I have 3.73 gears with a T56 6 speed and at 75mph my rpm is 1767. I’m getting around 21, 22 mpg with a EFI327.Passing at that rpm in 6th can be done, but you can’t put your foot into it, or it will bog.
What’s the ideal rpm for a Chevy T-56?
The reason the T-56 has overdrive 5th & 6th gears is GM’s need to improve the highway fuel economy numbers on the F body cars & the Corvette. The .5:1 6th gear puts the engine at the very bottom end of its comfortable operating range (about 1550-1600 RPM at 60 MPH) and allows a shift to the .75:1 5th for passing.
Decades ago Jeff Smith and super chevy did a SBC efficiency series that went fairly in depth. Car was a 70-72 monte. Moral of the story was cruise RPM in the range of 1800-2200 worked best for most passenger car builds. I have OT cars with overdrive and drag race gears that do road trips at 3100ish.
Which is the best rpm for highway cruising?
I was reading the article “Hitting the Sweet Spot” in the latest issue of Rod & Custom. It’s a helpful write up about optimizing highway cruising RPM with rear gear selection and overdrive. The article provides a formula to calculate RPM at any given MPH. It states that about 2200 RPM @ 75 MPH is a good target.
Some of those guys turn nearly 4k going down the highway. Not to be a post hog, but 3.08s and OD is right on the edge of acceptable IMO. GM loved to do that combo on G bodies, and they just don’t use OD unless it’s on clear highway, and even then it’s kicking out the converter for everything.
The reason the T-56 has overdrive 5th & 6th gears is GM’s need to improve the highway fuel economy numbers on the F body cars & the Corvette. The .5:1 6th gear puts the engine at the very bottom end of its comfortable operating range (about 1550-1600 RPM at 60 MPH) and allows a shift to the .75:1 5th for passing.
