alloy barrels and steel cam followers

Hi, one question is in my mind : steel std cam foolowers and alloy barrels , not the same expansion due to heat , is this a problem ?

Hi Marinatlas,
I am using alloy maney barrels for years, in the begining with std cam folowers, never have any problem: alloy expend more as steel.
The last years I use BSA cam folowers from Jim Schmidt with entire satisfaction
Bien à toi
Yves

I've run Steve Maney barrels for somewhere over 30,000 miles now with no issues. My barrel design includes steel sleeves for the followers, but I don't think I'll bother in the end. No use fixing a problem that doesn't exist. There's already enough of those out there.

I've never had any wear problems with stock lifters in alloy cylinders, but my experience with them is almost all on race bikes, which don't run up a lot of mileage.

Ken

Most of us that have used new Andover Norton stock in recent years have had to hand finish the follower to get them to drop down unaided.

So? assuming they are not left so tight they have to be forced in or pick up immediately, with an alloy barrel, can we leave them a little tighter?

Hi, all, thanks for your replies, the reason is I had a Billet alloy jug which have machined , and I need to finish it , means lining the barrle with sleeves, putting some inserts for all threads , and finish the followers bore to fit the tappets so either I fit a JS bronze lifter block , but I will loose some duration (with the Bsa A65 tappets) as I have on the shelf a Johnson 360 cam ( and don't want to spend more cash for the full story.....), or fit std followers , and such which tolerance will I play with (according to Steve above answer ...) , however, that will take time to meas this jug is on my desk , with only the cases and the Belgian nourish crank (thanks to Yves.......), got PM from Ken (thanks too...!) and years ago from Jan (about inserts in the barrel), I am happy that most of the gurus had answered me , and I wish all a nice and peacefull forthcoming year..........Pierre.

"Billet alloy jug" - Pictures please Pierre !!

Cheers,

cliffa.

Hi Cliffa, when I mean billet , in my mind I mean it came from the foundry as a piece of alloy with no holes , we could see only the fins ouside, top and bottom were uneven (sorry no pics of the "before" jug ), so my buddy had to make all the holes , drilling the oil way from the head, the most difficult was to mill the bottom, surrounding the followers block and so (sorry for my english....), that jug came from another frriend of mine who had a small batch made in a foundry ( who was dealing for the Peugeot factory) as he got some acquaintance due to his job, the machinist is another friend who was working at that time for French aerospace, it began may be ten years ago (can't remenber) and that jug stayed on my shelf all that time, now it's time to finish the job ..........!

Salut Jxx, merci pour ton retour et meilleurs vœux pour la nouvelle année

I have generally been able to drop new Andover lifters into a Maney barrel without doing anything.
I normally hone the bore of an iron barrel to fit the new lifters, which I appreciated since then I could remove any scratches and get perfect clearance.