350 CHEVY FLYWHEELS

[vince rvd]

Hi All,
Does anyone have info on 350 Chevy flywheels for an early steel block engine?
I’m sure there has to be a weight on the flywheel somewhere, (not sure what for!) as I have a crank & flywheel here, on checking the two together they seem fine!
So, if anyone can enlighten/advise me on what the weight is for, that would be great, as the Chevy is the only V8 engine I know of that needs this!

Also, if anyone knows the torque settings for the Chevy engine (heads, big ends & main), that would of a great help too, if not, I may just have to resort to asking my American friend!

Many Thanks
Vince

[Boosted Ls1]

I have a steel sfi rated flywheel here and it has a balancing weight screwed onto the back of it. It's got a twin plate valeo as well Thing is, I don't need it.

As for those torque settings, be careful as they vary depending on which engine you have. I'm thinking about the rods.

[Purple AK]

Hi Vince.
As said flywheel weights normally refer to balance weights, but I dont know any more than that, As for chevy torque specs, have a look here www.streetandstripmotorsports.com/charts_guides/charts_chvytrq.htm
HTH Cheers Chris

>> Edited by Purple AK on Tuesday 13th July 19:58

[steve_D]

The weight you refer to only applies to the 400 engines as they are externally balanced. The harmonic damper also has an offset weight on it too.

The 350 engines were internal balance so have a plain neutral balance flywheel and damper.

The reason the 400 is external balance is that it has a larger throw and there is not enough room in the crankcase for the increased size of the counterbalance so they put it outside.

Steve

[vince rvd]

steve_D said:

The weight you refer to only applies to the 400 engines as they are externally balanced. The harmonic damper also has an offset weight on it too. The 350 engines were internal balance so have a plain neutral balance flywheel and damper. The reason the 400 is external balance is that it has a larger throw and there is not enough room in the crankcase for the increased size of the counterbalance so they put it outside. Steve

Thanks Steve! just did not want to build it all up and then findout it needed the weight, as for the torque settings will try my yank mate.
(has to be beter than the last guy that build it! as one side big ends where only finger tight !!! and this was sold to one of my customers as a rebuild engine !from a company in the midlands!)

Vince

[steve_D]

I didn't offer torque figures because they vary greatly if you have quality bolts or studs like ARP. There is also a huge difference dependant on the type of lubricant used on the threads and the faces of the washers.
If the engine is stripped I would recommend using ARP throughout and the torque figures that come with each set of bolts.
Steve

[andycanam]

Vince... make sure its not a 350 engine with a 400 crank as this may still require external balancing.

This combination is known as a 383 (what I had) but wasn't a std combination so you will only be able to tell by measuring the stroke.

A 350crank has a 3.5inch stroke and the 400crank has a 3.75inch stroke.

but be warned some after market 400cranks are internally balanced.

Andy

[Purple AK]

vince rvd said:

as for the torque settings will try my yank mate. Vince

Didnt notice my link then?

>> Edited by Purple AK on Thursday 15th July 00:07

>> Edited by Purple AK on Thursday 15th July 00:07

[vince rvd]

Purple AK said:

vince rvd said: as for the torque settings will try my yank mate. Vince Didnt notice my link then?

Sorry Purple AK !!
I did look at that link and it has the standard settings ! thanks ! but still not sure what the engine is ? as stated on some of the other posts ?

so just finding out as much as i can as puting it back to gether now ! and if you have read dens latest rant in kit car you may know some of the reasion i dont have much time at the moment, so sorry if i dont reply to every post, just no time !

thanks again to every one that posted