csmc711

iTrader: (4)

Yea, yea, I know, but, I dont want all those cubes, just some unshrouding of the valves with the 4" bore. I have not looked into what does what, but, maybe a good long stroke with extra shorty rods and tall pistons? Was thinking about the longer TDC dwell times + less cubes (for me) = a dog, lol?

A.R. Shale Targa

iTrader: (2)

If you sonic check the cylinder walls for thickness, a set of standard bore LS3 pistons at 4.065" and a 4.8 (3.27") crank and rods would make a nice 340 cubic inch engine.

TurboBuick6

iTrader: (2)

I have always tossed around the idea of a de-stroked 6.0L. Sure it won't make power until 4k but dam will it sound great at 8k and also be fun to drive.

SSCamaro99_3

iTrader: (1)

The only thing I would consider is if you buy the right parts to turn 8000 rpm reliably with, let's assume a 4x3.25 setup, what is the price delta to make a 4x3.62 reliable at 8000 rpms. If it is small to nonexistent, why not keep the cubes.

TurboBuick6

iTrader: (2)

Well for most LS guys who will only pay 200 for a complete valve train kit, it's too expensive. In reality though, short travel lifters, 3/8 PR, a good dual spring and hollow stem valves will get you there.

IronBlocked

I prefer less-same revs on stock valvetrain with a stroker kit than a destroker high revving expensive engine.

SSCamaro99_3

iTrader: (1)

That was kind of my point. If you spend the money to do 8000rpms right, is the stroke length going to be material to achieving, 8000rpms for instance. A good quality crank and rods couled with a good valvetrain will probably have no durability change between a 3.62 and a3.25 stroke. So why not keep the cubes.

TurboBuick6

iTrader: (2)

I don't know. There may not be a reliability difference but if I were to guess, that shorter stroke coupled with slower piston speed is going to help the lower end quite a bit in terms of the amount of time before rebuild. Then again, maybe not

SAPPER

iTrader: (10)

You're probably gonna have to search the dirt track forums / articles for that. Those are about the only guys that run that kind of setup.

A.R. Shale Targa

iTrader: (2)

Why is the belief that the shorter stroke has to spin 8000 rpms to make power ?? A composite intake is well beyond its design by then.
Let's pick a target of 7200 or 120 revolutions per second
Every crankshaft revolution moves the piston all the way down and all the way up. Essentially traveling the stroke distance twice.
3.622 X 2 X 8 pistons X 120 revolutions per second = total linear inches of ring travel
Now devide by twelve to get feet per second
The stock stroke ends up being 579.52 ft/sec
The 4.8 crank at 3.27" travels 523.2 ft/sec at the same 7200 rpms
Roughly eleven percent reduction in ring travel/friction.
Now if the op was gonna build a 376 then the 36 extra cubes will matter.
However if he's replacing a 346 with a 340 cube engine, same rpm, I already
know which one will make more average torque. Perhaps a few less peak
ft./lbs. but more average.

2muchboostNY

iTrader: (8)

Enjoy https://ls1tech.com/forums/dynamomet...8tq-video.html