Double roller or single?

[marty koirtyohann]

Roller timing chains are stronger and have less friction. The horsepower does not matter a whole lot unless you are getting that horsepower by running the engine over about 5000rpms. The higher rpm engines put more stress on the chain, so if that is your intent go with a double roller and a 3 bolt camshaft. Otherwise, a double roller is probably over kill but it certainly will not hurt anything to have the extra strength.

Dave

i ran a single bolt double row one on 400 b motor i turned 6000 rpms @ the track all the time i did it for llmost 12 yrs & dove it on the street i never replaced it or opened up the motor after i put it together

 

[marty koirtyohann]

but its yur motor do s u like ! if i was u .i would put a good quality double row set , drive it & dont worryabout it

 

[cbarge]

3 engine rebuilds and all. 3 got the Cloyes double roller.
Probably outlast the rest of the engine!! Lol!

 

[WissaMan]

Here's a nice little vid about the various options:

Especially interesting is his statement about the gears not being compatible with EFI systems because they can create noises that get picked up by the knock sensor. I have to wonder why they don't make timing gears with slanted teeth -- wouldn't that make them quieter?

Also, when installing a timing belt, I assume you have to install some kind of plate to block off the oil supply to that area?

 

[MEV]

Because if you read my post I talk about valve spring pressure, I run solid roller cams with 650lb springs and I will not take the chance of chain stretch. There for I run gear drives, as for the price you can pick one up for $150 bucks or so or if you are like me I use the Mildon one. If you are going to do a stock rebuild I would buy a stock replacement if you are doing a performance build with more spring pressure for example 350lb springs buy the double roller, if you run a solid roller cam I sagest a gear drive, never really liked a belt drive but to each their own. Ultimately it is what ever your wallet and/or your wife will let you spend! ;)

That is mostly an old wives tale, run it because you like the sound or just because you want too. 650lb springs are not going to stretch a chain any amount that would matter, and like these guys say the serious guys run a RUBBER belt with valve springs with 4 times the spring pressure over stock.

Are gear drives stronger than timing chains?

 

[WissaMan]

I just looked up timing belt kits for the 440 on Summit. All are over $1k, with one almost $2k! Why are they so expensive? Just looking at the pictures, you might think it'd cost a couple hundred bucks, maybe $500 max.