4C or not 4C ? , That is the question.

jotajoe

jotajoe

Hero member
Location
Warwickshire UK
I have a Jota 1000 engine in my bike with 4C Cams.

I have a pair of A11 cams in the spares cupboard.

My question is do the A11 cams make for a better road bike..torque lower down the rev curve ? better fuel consumption etc ?

I'm just thinking next time I do a valve job I might swap the cams over..but only if there are benefits. I'm not too bothered about the Kudos of saying my bike has 4c cams..I'll just pop them in the cupboard for posterity :)

joe
 
4c's are OK on the road. More important than what is fitted is how it is fitted. Check and correct your valve timing or making any sort of cam comparison is meaningless. The valve timing is almost never right out of the box, quite often spectacularly wrong. Your engine will respond very well to careful set up of valve timing with whatever cams you choose.


  Keith
 
My seat of the pants dyno tells me to throw the A11s to hell and keep the 4Cs.
They are just so much better all round.
But that's just my opinion.
 
The 4/c's have a more rounded profile so can be easier on the buckets - as has already been said - it's very important to get the timing right - then either cam will give a good spread of power - with the 4/c giving a fair bit more overall - Regards - phil
 
You must log in or register to reply here.
Back
Top