Best cams for 888

SPO

Hi,

I am new to this forum. I am from Germany.

I am planing to tune my SPO.

For now my 888 pulls 105hp rwhp.
Only mods are v.stacks, 50-45-50 exhaust system and Ducati performance air filter.

Still unmapped...
My plan is 926ccm and a good headporting with bigger valves.

Which cams should I choose? Standard, G or SPS cams?

It should be still drivable on streets.

Regards and thanks

nine16

916/996 SPS or Vee Two copies (748 SPS) are completely different. Other can make better peak power but you lose midrange and have to over rev them.

I wouldn't bother with a big bore. Just set the squish for a little more compression. If you need power that bad, just do a 996 cc ST4S swap.

Mr.R

If you can find some go for 9*6SPS T1 or V-Two 604 which are very near identical and big valves 36/30.
Advance the inlet cams by 12.5 degrees giving a centerline of 107 degrees and you'll have a motor that'll pull up tree stumps whilst still making very good power at under 10,000rpm.

Steve R

SPO

Mr.R wroteIf you can find some go for 9*6SPS T1 or V-Two 604 which are very near identical and big valves 36/30. Advance the inlet cams by 12.5 degrees giving a centerline of 107 degrees and you'll have a motor that'll pull up tree stumps whilst still making very good power at under 10,000rpm. Steve R

Hi,

thank you for the tip 😎
G cams are to aggressive?
The problem with T1 cams and other are, they have no mechanical tachometer.
Is there someone who can do this job?

Sebastian

Mr.R

Hi Seb,

2 ways to deal with the lack of a rev counter drive...
1st, Fit an electronic one,
2nd, Machine the end of the cam to except an extension to drive a cable.

G"" cams push the peak power up to around 12,000rpm, which is C/case busting territory.

Steve R

SPO

Mr.R wroteHi Seb, 2 ways to deal with the lack of a rev counter drive... 1st, Fit an electronic one, 2nd, Machine the end of the cam to except an extension to drive a cable. G"" cams push the peak power up to around 12,000rpm, which is C/case busting territory. Steve R

Hi Steve,

G cams are easily to get.
Does they destroy the drivability extremely?

Who can machine the end of SPS cam?
Do you know someone?

Regards

ducati dad

Didn't someone on here do that conversion a few years ago?. I seem to remember a thread about how it was done..

Mr.R

SPO wroteHi Steve, G cams are easily to get. Does they destroy the drivability extremely? Who can machine the end of SPS cam? Do you know someone? Regards

No they destroy the crankcases in pretty short time. It's not for nothing that the genuine 888 Corse machines needed their C/cases changed at regular intervals.
12,000+ rpm kills 851/888 crankcases and that's a fact!

Any competent engineer can convert a non cable drive cam to cable drive. If you can supply them with your cable driven cam and a suitable non cable driven cam.
But why would you when all you really need to do is convert to an Electronic/more accurate instrument?

If you must go for higher revs (and loss of any reliability) then go for 431 inlets and G exhausts.
That set up is probably the best for racing, but for the road my recommendation is still T1 or V-Two 604's.

Steve R

stiglarsenDK

Planning conversion

Im planning conversion of some 431 and G cams in January .. Will fabrikate the stubs and pressefit those on the drilled cams (special carbide drill just ordered)
Let me know if you want 1 done on the same goe

brad black

the g or a or 748sps (U1/A) cams will give it a midrange hole, and strong power above that. as steve says, the 916/996sps T1 cam will make strong power everywhere. i don't believe the g cam would make more top end power than the 996sps cam either.

don't overcam a road bike. it's a mistake lots of people make. unless you will rev it over 8k consistantly.