I have a turbo Busa. A few friends have had major engine damage when the chains break. One had a Billet cover just in case ( I wont metion the manufacturer ). It still destroyed many components. Who would you guys recommend for the strongest cover to prevent that wicked chain from trashing the water pump, etc....
Billet cover how strong....
- Thread starter titan1969
- Start date
Was it like this?.....
suzuki4life
Banned
Ok first off.....the billet covers are not designed to absolutely remove any and all possible damage in case of a chain break. They are merely insurance to help reduce the amount of damage. The original intent of a the billet cover was to handle the increased stress placed on the stock cover when heavy duty clutch springs are installed. MANY stock sprocket covers would break from the pressure alone. Once the covers were made a few guys had commented upon the fact that the covers saved a lot of the "normal" damage a broken chain would had "normally" caused. It is to the best of my knowledge that NO ONE, has ever conducted any true testing to prove IF or how much damage the cover will save in reality. You are basically playing the odds with added insurance.
Second: what cover is the best? Well in reality, they're all very similiar. BUT a few things to keep in mind. The covers are all pretty much made from T6 6061 Alum. Your cases, pump and covers are all cast alloy crap. The cover should take a hit BETTER than a porous cast material would. BUT.......remember, the cover is attached by VERY small mounting tabs in cast alloy alum. cases. There is such a thing as making something too stiff. The law of inertia states the energy of the chain must be directed and/or absorbed somewhere. Do you what some flex in your cover thus allowing it to absorb some of the hit and divert the large intensity of the hit from the cases, pump or covers. OR you you want it built like a wall or a rock and merely deflect the energy only for it to be absorbed solely by your cases, pump or covers? This is exactly WHY I didin't use steel pins in my cover to stiffen it up. This is exactly why I scrapped my original 2 piece cover I designed. I know this sounds pretty strange to hear that something can be TOO strong or stiff....but in reality and engineering people have realized that even with the best that we can design and build, its easier and normally has the best results...if we build things to flex around a situation rather than take it head on to try to cure it. Things built to flex (you know dumb weak things
skyscrapers, bridges, tunnels etc.Designs built not to flex: teeth, glass, ceramic etc. Never hear of those things breaking right?
suzuki4life
Banned
Same as mine, kickstand racing, schnitz etc.
suzuki4life
Banned
If you want the strongest cover (I highly recommend againist it) BUT I will build you one to order.....2 piece...large piece will be made from a solid block of 6061...(or I'll do 7075 for a $100 extra). I will add full length hardened steel dowel pins from outer cover recessed into the engine block where it allows. Outer cover will bolt to inner cover using recessed bolt and lock nutted A8 grade stainless bolts. All hardware will be grade A8 stainless. The cover will only allow the use of a 17t sprocket to ensure I can make the wall thickness at absolute max. and it wil be contoured to help direct the chain outward and downward in case of a snap situation. Outer cover plate will be 3/4" thick. $350 for t6 $450 for t7.
I'll draw something up quick if you have any questions.
These will be bought and paid for before I even order materials. Turn around time will be under 4 weeks from time of ordering.
For an additional $200 (must be bought with the prementioned cover) I will make a billet shifter shaft cover from t6 (or add $100 for t7) will will help reduce the chance of this cover breaking when the chain snaps and the sprocket cover directs the chain's force downward towards THIS cover.
For the right price I will consider even doing billet cases...$2000 cash upfront. And I work hourly. Unknown pricing as of yet....but I am willing to put forth the effort if the cash is laid down.
I'll draw something up quick if you have any questions.
These will be bought and paid for before I even order materials. Turn around time will be under 4 weeks from time of ordering.
For an additional $200 (must be bought with the prementioned cover) I will make a billet shifter shaft cover from t6 (or add $100 for t7) will will help reduce the chance of this cover breaking when the chain snaps and the sprocket cover directs the chain's force downward towards THIS cover.
For the right price I will consider even doing billet cases...$2000 cash upfront. And I work hourly. Unknown pricing as of yet....but I am willing to put forth the effort if the cash is laid down.
Billet cases,hmmmmmmmmmm.
suzuki4life
Banned
Should I be expecting a money order for some cases anytime soon?
That was Kens bike.
suzuki4life
Banned
Yeah approx.
$500+ for cases.
$50 water pump
$35 for sprocket cover
$35 for shift shaft cover
$1000+ for tear down and rebuild...
I'd bet $2000 is VERY generous. Could push $3000 depending if it caused problems to your tranny+++....if you have investments already.
Ie: expensive chain
undercut tranny
billet output shaft
etc etc
2000 for a leg aint too bad !
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