Urambo Tauro

I'll be replacing my timing chain soon. I don't want to change it to a belt or gear drive. I'll stay with the stock chain/sprocket setup for my daily driver.

From what I've been reading, double roller chains are the way to go. Some sprockets are steel, some are iron.

I'm currently looking at Ford Racing's M-6268-A302 and M-6268-B302 sets. The "A302" set has iron sprockets, while the "B302" set comes with steel ones. There don't seem to be any other differences between the two, but one vendor (who does not offer the A302) posts a disclaimer that the B302 set is not street legal. Why is that?

Urambo Tauro

The exact quote was "not legal for sale or use on pollution-controlled motor vehicles." I found a similar disclaimer for the "A302" set on another vendor's site, so it looks like both chains are suspect. Now, we don't have inspections in Michigan, so that's a relief. But I have no intention of disabling or defeating pollution controls on this car.

Now that I've thought about it some more, I think the disclaimer has to do with the multiple keyways in the sprockets. I could see how that would affect valve timing.

Pretty silly to blame the part, when installation is what really makes the difference.

bluebeastsrt

Timing chains do one thing. Control the timing of the valve train. They are all legal in all 50 states. A lot of web sights put that disclaimer on everything out of laziness and fear of being wrong and having to deal with lawsuits. A double roller is solid choice. I run a ford racing unit like you mentioned in my 9 second 95GT.

Boss_Hotrod

Im running a Cloyes on mine cand my brother's car. Cant remember the number but they are their Tru-Roller line. They are about $100 but are nice sets.

As far as the iron vs steel gear I think it has something to do with what the cam is made out of but im not sure since the gear is just bolted to the cam. Id be more worried about the thrust plate. The stock one is iron and the ford racing one is steel (if I remember correctly).

Urambo Tauro

I went with the M-6268-B302 set. Once I have it apart, I'll make sure to take a good look at the thrust plate.