Whatever floats your boat brother!

 

If I knew how to post a link I would send yall to Haggards "fighting side of me".
That or chattahoche by Alan Jackson is mudding music.

For metal try some slayer or pantera.

 

Some people here really, REALLY, need to stop thinking stroke has anything to do with rpms. The cam, heads and intake will dictate the rpm range, not the stroke (unless you go to extreme applications like 5" stroke and larger). 408 windsor stroker motors have a 4" stroke, and i see those getting revved to 8-9K rpm all the time with the proper internals to do the job. Alot of misinformation gets spread around this site.

Cool pics nonetheless.

 

Generaly a long stroke engine is not intended to wrap up that high. It can be done. But all that mass swinging around so far from the centerline stresses bearings and cranks. Twists on wristpins and rods. Generaly in a stock engine it is an unhealthy situation.

Safe repeated redline for a 428 is about 4500.
390 5000
351 5500
302 6000
292 5000
etc, etc.

Can these engines can all be built to rev, Yes. Aftermarket rods, bearings, pistons, and an improved oiling system are in order though. A 427 can turn 7k from the factory because it was a factory built race engine.

Could a guy build a 300 to twist out to 6k. YEAH!

 

Misinfo ??? 408 reving 9K ??? Thats a race motor !!! I havn't seen that many ??? You should help us out with the set up to do that ???...Lew

 

The point is, that it can be done. most rev to around 6000-7000rpm for a stock block. And then theres people on here saying a 300 inline six cant rev that high because of the 4" stroke is a bunch of garbage.

 

Hey Chris!

I've always thought the 300 cannot safely rev past four grand because of the four inch stroke and the fact the 300 isn't that large. I know most big blocks have a four inch stroke, but they have a lot more displacement than the 300 does.

 

OK when you build it to rev 7000 i want to see it... What are your plans to do this ?? alot of use want to know ??? Your the expert....Lew

 

I dont even have a 300 six, i never said i had any plans to do it. I just said its far from impossible, and id gladly work with someone to make it happen. The only restriction is going to be the fact that aftermarket cylinder heads for the 300 six dont exist as far as i know but there may be some home made stuff out there. The point is that it can be done, that is all.

 

Strap a big enough engine to a brick and it will fly.

No, I wont run a stock 300 over 3200. Mine in my 85 has stiffer springs to match the cam. That makes it turn at a whopping 4k. Had it there once. Pulling a minivan out of a snowdrift in first.

Crap, I almost never have my rpms above 3k.

 

The way I look at it, the speed that an engine is run at is a dynamic factor in determining the stress on components. More engine speed means more stress, in every respect and angle that the engine internal moving parts see stress, they all increase with speed. Then there are certain mechanical factors that determine stress on components, such as the weight of the reciprocating assembly (piston, wrist pin, connecting rod) that affect the inertial weight that has to be accelerated, decelerated, stopped, reversed, as it travels between TDC and BDC. And the length of the stroke that, tied in with the rod ratio of the engine, affects the side loading that piston skirts and cylinder walls will see.

So a heavy reciprocating weight will cause greater loading on components at any engine speed than would a lighter reciprocating weight. And a longer stroke will cause a greater side loading stress on components at any speed as well. And both of these and all other dynamic stresses become magnified as engine speed goes up.

So it makes sense to A) reduce reciprocating weight. And B) not use a huge stroke. When building a high revving motor. Yes, you can still have a motor rev high if you do not do either A or B, but the corresponding stresses on the engine would be higher than in another engine where the builder had not ignored A or B.

A long stroke motor can rev high just like a motor with a heavy rods and pistons can rev high, if you can just make it handle the stress. But more stress tends to always equal less longevity or reliability. So it all just depends on what you want out of the engine I suppose.

 

There are a lot of 'old timers' out there who used to build I6 dragsters. They can crank out the rpm's. It is just a matter of time and cash.

 

223s and chevy 230s were popular drag engines in certain apps. Shorter stroke though. More like 3.6" or so. I thought of building a tank racer with a 300. Tanks are about 2k though.

 

I think stroke matters to an extent(the short stroke of the 302 might hurt low end torque a little when you get to building it), but not really on a 300. I hate it when people say "oh the 300 wasn't designed to go fast Ford made it the way they did to last long and have low end torque" whatever Ford made the 300 the way they did to be cheap, and lazy, besides only old men actually WANT TO HAVE A 6CYL LOL.

Another thing I hate is "the 300 wasn't built to go fast get a V8". To a certain extent people who say that are right, but trucks in general weren't meant to go fast, but people make them go fast. The 300 can have all kinds of good power at all RPMs. Just because you do things to a motor to make it have more power at higher RPMs doesn't automatically mean you have hurt your low end torque either. You would have to go really crazy to hurt the low end torque out put of a 300 6. The better your motor breathes the more power you will have all through the range, yes you can go crazy and have a motor better suited to a race car, but that probably ain't gonna happen with a 300 6.

 

I took my muffler off and lost low end torque.

I disagree with a lot of what you said by the way.

It's all good in the hood. I guess I must be an old man 'cause I want a 300, but that's alright. I'd like to have a big block but I can't afford the fuel. I don't want a small block because I like how bullet proof the 300 is. That's important to wrench dummies like me.

I guess Ford should have built a better motor or something, huh?

I know. Ford should have built a 350 horse 900 ft lb I6 diesel to stuff in their half tons. The best of three different worlds; speed, pulling power and fuel mileage.

Oh wait, such a motor exsists. Unfortunately it's sitting under the hood of all the Dodge HD work trucks.