Paladin Rally - Re:Subaru Cam Sprockets

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John Vanos Visitor	Re:Subaru Cam Sprockets - 2005/11/06 18:31 Dougs car is mega mega powerful, apparently somewhere over 500 ft/lbs says Quirt (engine builder) likely with the 40mm restrictor though. In any case, motors will blow when pushed that hard sometimes. I think you have it right, right now you have a fast car but not one that is so fast its unreliable, finishing is paramount in my opinion and you do that quite well, keep it up! Make you car 95% as quick as others then wait for them to DNF. Thats our plan for next year!
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Matt

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Re:Subaru Cam Sprockets - 2005/11/07 07:34 Thanks for the info. It's good to know what the real story is. Sweet motor, tuned to unreliability. Well, thats very rarely the builder's fault!

customer-"Give me every ounce of power I can get!!!"

Builder-"Well...ok."

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Richard Wong Visitor	Re:Subaru Cam Sprockets - 2005/12/06 18:37 Hey Matt , Cool site ! As for the cam sprockets, I find it weird that you are damaging them under rally use. We never had problems like that before. The JUN sprockets are good quality stuff even if they are steel. We had the Grp A ones at one time(aluminum) and is still being used in that car. What I did notice and what I was told that eventually the cogs themselves start wearing down. Of course Prodrive just replaces them but those things are dam expensive if you were to buy a set. Which is the reason why JUN made them of steel. I think there is a trade off with steel vs weight/reliability. As for Crawford Performance. Don't know how they are building engines but I get the impression they are trying to re-invent the wheel when there are already proven GrpA/Wrc stuff out there. Gas-ringed sleeves/nickesill liners , Grp A cams, sprockets . etc has been out there for over 10y+yrs. 95-96 Grp A cars were putting out close to 500ftlb torque on a 34mm restrictor.
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Matt

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Re:Subaru Cam Sprockets - 2005/12/13 10:41 Richard,
I'm glad you like the site! It's good to have people with a deep knowledge of the sport posting.

I only break the sprockets when I hit things, which is more frequent than I'd like to admit. The problem is that these medium offs, hard enough to touch the motor, but too soft to crack the block, bust my sprockets and lose my timing.

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RalliSpec Visitor	Re:Subaru Cam Sprockets - 2006/05/13 21:23 The JUN cams are machined steel if I remember correctly. Only sold a set or two of them. The quality is really nice but not all that light obviously. I am guessing that steel was chosen for long term reliability reasons. Maybe it is possible to request a version in aluminum. Half the time when we order stuff from JUN it seems like we need to wait for them to make it first anyway. --Dave
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