what kind of motor is this

http://www.buysell.com/showad.asp?id=4092218

V-8 Gasoline engine
Big Block Chevy family, used in trucks. Don't know the bore and stroke though.

Originally posted by Chief Yelling Alot
what kind of motor is this

It's a Chevy bigblock. I had a '68 Chevy C60 dumptruck that had one. Not much power, not much gas mileage, but they supposedly last forever. You probably don't want one. All the weight and most of the thirst of a 454, but only about half the power. :(

Then again, mine did survive (marginally--lots of overheating stops) this:
http://www.rockstomper.com/images/trails/rubicon/rdtrain.jpg

It wouldn't turn more than 4k RPM, got 4-10mpg (depending on load and speed--that trip in the pic, was mostly around 4-6mpg) and wouldn't go uphill faster than about 25ish. :(

Well, it looks like a GM 366 to me....no really, its a tall deck big block GM motor used in C50, C60, Topkick, Kodiak, etc... big trucks and dump trucks....they also have a 427 tall deck. Both of these motors externally look just like a Chevrolet Big Block and also share the same bore as the 396, 402, 427 passenger car/truck engines. And many of the tall deck motors come with steel cranks (drop in swap into a normal bb gm).

hope this helps,
Justin

I believe the same crank is used between the 366 truck and 402 car. The 427 truck and 454 car use the same stroke cranks. Which means you can swap your oem 427 truck crank into your car 454 and get a stronger crank. I believe. The deck is taller on the truck engines, some people claim outstanding power and mileage.

Mr. 4wd knows a ton about these engines....

The 366 is a very small bore BBC. Stroke is the same as a 396, 402, or 427, but not a 454 as it is longer stroke and is externally balanced like a 400sbc. It has 3 compression rings, therefore the need for a tall deck. Also it has peanut port heads that are smaller in cc intake runners compared to your normal oval port heads. The "only" good thing that I can say about a 366 is it "probably" has a steel crank. Other then that, I would not touch it. :)

Last one finally got it right. 366, 396, 402, and 427 all use the same stroke, but DIFFERENT bores. 427 & 454 share the same bore, but the 454 gets a longer stroke.

Incidentally, the 502 shares the stroke with the 454, but has a much larger bore. The new 8.1L (496) shares the 427 & 454 BORE, but has an extremely long stroke.

TEX

Supposivly racers like the tall deck blocks becuase they can run a regular two ring piston with a longer rod for a better rod ratio....A buddy of mine is currently looking for a 454 block that he can swap a 366 crank into so that he has a 427 with a steel crank...and he just has some thing with big bore short stroke.



Justin

Tall-decks are definitely the hot ticket, especially for strokers who still want to use decent rod lengths.

As for DEstroking a Rat, I think that would be a good idea for drag racers who have a lbs/cubic inch rule. Something like a destroked 502 would really scream since it'd be WAY oversquare & you could use super long rods :smokin:

TEX

Originally posted by TEX
Tall-decks are definitely the hot ticket, especially for strokers who still want to use decent rod lengths.

As for DEstroking a Rat, I think that would be a good idea for drag racers who have a lbs/cubic inch rule. Something like a destroked 502 would really scream since it'd be WAY oversquare & you could use super long rods :smokin:

TEX
Correct, Reher, Morrision and Shepperd did that well over 20 years ago when eveyone was running small blocks in pro stock. RMS was kicking everyone ass too! Thats before Lee got killed in Oklahoma. Another very good reason to run a tall deck 427 .060 is with a 1/4 inch longer over a 454 stroker crank, is you get 511 CI with stock rods and pistons. Have one of those too!

Originally posted by Shadow man

Another very good reason to run a tall deck 427 .060 is with a 1/4 inch longer over a 454 stroker crank, is you get 511 CI with stock rods and pistons. Have one of those too!

.25" stroke (4.25" vs. 4") plus .060 over only nets ya 496" :D Ya gotta go .120 over for 511" - which is doable :)

TEX

Thanks Ramv... You made me blush :)

Anyways, GM big blocks are stamped with either Hi-Perf Pass, or truck... Don't be fooled by the hi perf pass, those even came in pickup trucks. Truck, meaning 3 ton and up...

Truck blocks have a 4/10ths of an inch taller deck height meaning you need longer pushrods, a wider intake and longer connecting rods. They use FOUR rings per piston, as opposed to 3. The factory heads use something called "peanut ports" which are really undesireable if you plan on winging the motor up past 3600 RPM.... The 366 shares the same crank as a 396, 402 (which is a factory 396 bored .030 over) and a 427 (pass)... But steel, meaning it'll last longer in its intended application or, in a car motor you can balance it and rev the piss out of it. A truck 427 (.400 taller deck height) uses the same crank as a 454 or (502, but 502's never came in a gen. 5 or under motor. It's all gen 6 stuff now boys)... Out of the factory these motors were comparable to a 472 caddy or 403 olds... 250 horse, 350 torque sorta thing... TBI'ed and injected motors bumped up another 25 horse and 40 pounds of torque... They weren't offered in a light vehicle since they really don't rev. They weren't much when offered with a 465 or 400, but when used with a clark 5 speed, and even a 2 spd axle they were more desireable. You need an overdrive since they don't offer much for off the line heavy load grunt and they can't sustain more than 3500 RPM for very long....


Now, if a guy wanted to make one of these motors work, he'd want a 427 TRUCK motor, keep the crank, con rods, push rods, balancer and flex plate OR flywheel (since it's externally balanced just as a 454. The 366 is internally balanced as is a 396 or 427) and he'd clean up the block, buy the suitable 3 ring aftermarket pistons to fit, Use a set of RECTANGULAR port heads (aluminum Edel brock or World Products even), 1.8 roller rockers, an Edelbrock victor intake (use the ??? thick spacers since the intake is wider {taller deck height, remember}) a carb that'll flow around 850 CFM, port match the intake and spacers, a good, high lift 292 duration cam, high pressure oil pump (not high volume, there's already enough oil floating around in these to keep em really wet) a bigger oil pan (8 quart and above)... Have it balanced to 7000, line honed, decked, bored up to .120 over, clean up the casting mess so oil runs back into the crank case and presto-bango. You're running 500 real horse at 4800 RPM and like 650 pounds of torque at 4000, all for about 3 MPG... Dieselesque torque with LS-6ish horsepower. You can do it for cheaper than you can build a 454 with this much power for too, but it's less common and most engine builders don't know much about em...

Originally posted by MR4WD

Now, if a guy wanted to make one of these motors work, he'd want a 427 TRUCK motor, keep the crank, con rods, push rods, balancer and flex plate OR flywheel (since it's externally balanced just as a 454. The 366 is internally balanced as is a 396 or 427) and he'd clean up the block, buy the suitable 3 ring aftermarket pistons to fit, Use a set of RECTANGULAR port heads (aluminum Edel brock or World Products even), 1.8 roller rockers, an Edelbrock victor intake (use the ??? thick spacers since the intake is wider {taller deck height, remember}) a carb that'll flow around 850 CFM, port match the intake and spacers, a good, high lift 292 duration cam, high pressure oil pump (not high volume, there's already enough oil floating around in these to keep em really wet) a bigger oil pan (8 quart and above)... Have it balanced to 7000, line honed, decked, bored up to .120 over, clean up the casting mess so oil runs back into the crank case and presto-bango. You're running 500 real horse at 4800 RPM and like 650 pounds of torque at 4000, all for about 3 MPG... Dieselesque torque with LS-6ish horsepower. You can do it for cheaper than you can build a 454 with this much power for too, but it's less common and most engine builders don't know much about em...

Buddy of mine went this route, but took it a bit further. Edelbrock Victor heads, just a .030 over to clean it up, a 4.25" crank (488" CID), and I think his current carb is a 1250. Full roller cam, ~14:1 compression, zings to 8,500 & is putting out close to 800HP. Oh, did I mention he stuffed it in a 3,500lb CJ7? :D


TEX

Yeah, full rollers are the way to go.... I betcha that yeep'll do wheelstands too.

Originally posted by MR4WD
I betcha that yeep'll do wheelstands too.

Yup, have seen him do it from a dead stop - had help with this one though ;)

http://bbs.off-road.com/wwwthreads_uploads/8-484355-th.jpg

TEX