Come in and judge my timing chain tension

[bthomas]

I have 2 sets of timing assemblies I’ve tried. One is the original set that came with car and the other is a 5 under set. Both are rollmaster billet.
Engine is sbc.


First set



5 under set

[bentvalves]

sorry I can't be of any help pal, but the way you have those vids just looping along without clicking anything is slick!

[MadBill]

So you can open those pix OK? On my screen it just reads "image" and the cursor won't change to the hand to open them..

[Kevin Johnson]

I have 2 sets of timing assemblies I’ve tried. One is the original set that came with car and the other is a 5 under set. Both are rollmaster billet.
Engine is sbc.


First set
https://i.imgur.com/szTu32D.mp4


5 under set
https://i.imgur.com/do16Bb2.mp4

[DCal]

They're both looser than my Rollmaster set but I haven't started the engine yet. I hope that's not typical.

[MadBill]

The five under one looks just right to me. (Thanks for the link Kevin.)

[Mark O'Neal]

The five under one looks just right to me. (Thanks for the link Kevin.)

Me too.

[leahymtsps]

Me three

Tom

[treyrags]

Agree on the -5 chain. I had a new chain and gear in a new block about as loose as yours. I didn't like it and was about to change to a shorter chain before I took into consideration it being an aluminum block. So I left it alone. It's hard to gauge something like that but I would rather it be a little loose than risk the block expanding more than expected and binding.

[MadBill]

For my aluminum BBC, I calculated ~ 0.005" more cam to crank spacing hot vs. cold than for an iron one.

[treyrags]

For my aluminum BBC, I calculated ~ 0.005" more cam to crank spacing hot vs. cold than for an iron one.

That sounds right. I came up with ~.004 more based on the spacing and 100 degree change on my small block.