13 replies to this topic

[IainNeon91]

Hi all, got my mini to the magical Mr. Peter Baldwin to be tuned on his rollers last Friday. All went very well started with 48BHP and ended up with a respectful 53BHP our of my 998 (stage 1 kit, hif38)...

Only i could have had way more. But the power was peaking out way way to early, i got 53BHP @ 4800RPM then it started to drop the power. Mr. Baldwin asked if i had had a camshaft change (which i haven't) as the cam timing could be out? Either this or the timing chain has stretched over time or the camshaft is worn.

So me and my dad have decided to make this a summer project for us both... New cam, valves to suit, followers, duplex timing chain etc. etc.

Story over, and my question is... Has anyone had any good expierences with the MiniSport own 256 cam? As it is a hell of a lot cheaper. Or is the reason right in front of me, should i just save for the Kent 256 kit??

Link:

http://www.minisport...nfo_CAM260.html


Many thanks,

Iain.

[jaydee]

I've heard form conversation that minisport 250 deg cam is essentially a standard cam.
The kent 256 works pretty much as a SW05, wide power band and decent torque, but you need rollers for that cam, otherwise it is just useless imho

[mini*mad]

266 is th minimum fast road cam to be honest
Otherwise it's not really worth the hassle taking out the original!
I'd go for 276
Still a very usable everyday cam!

[IainNeon91]

I wouldn't mind a low down power cam, more torque... What would be the 'best' cam then??

[KernowCooper]

I wouldn't mind a low down power cam, more torque... What would be the 'best' cam then??

266 on a 998 otherwise you'll be chasing revs with a 276 IMO

[BritishRacingGreen]

what about the KC500? (MG Metro)

[jaydee]

I wouldn't mind a low down power cam, more torque... What would be the 'best' cam then??

266 on a 998 otherwise you'll be chasing revs with a 276 IMO

+1

The 276 needs to be revved above 4k rpm to be usable on a 998, below that it will be simply slow. You'll need a short diff too.
A 266 cam will be good but still got really poor pull below 3500 rpm

The MG metro is a great option for a road tuned 998.

That said, for any cam you're gonna use, you'll need the cylinder head modified accodingly to the extra camshaft lift and duration.

[IainNeon91]

I've got offered a Kent 246 cam hardly used for £40... Yay or nay??

[ACDodd]

Kent 246 is a perfect cam. Modern profile and good lift. Wide power band. Perfect for a fast 998.

AC

[jaydee]

Its a good cam, in what condition is it?
Take in account a better cylinder head, the 246 is high lift

[IainNeon91]

Yeah i'm going to be modifying a 202, as the 295 is too hard to get hold of one, without spending 2-300 quid... I'm also going to be getting the M.E.D full alloy duplex timing gears and chains.

[IainNeon91]

I'm also going to be getting the M.E.D full alloy duplex timing gears and chains.

Best get a couple, then you won't be waiting on delivery when it needs replacing.....

Oh dear, this doesn't seem too good....

[Shifty]

I've got the sw5 kit in my Elf, with a decent 295 head he made about 65 at the flywheel

[Cooperman]

Yes, if you run a steel chain on alloy sprockets it doesn't take a genius to realise that the sprockets are going to wear quickly.
On a race car the idea is to minimise the rotational inertia so an ultra-light flywheel, lightened con-rods, alloy timing sprockets and wedged and lightened crank all make good sense, especially as a race engine will be stripped after every few races and will probably only do 200 miles between rebuilds.
For a road car the standard duplex steel sprockets are fine and will last a long time. Also the difference in performance between steel and alloy sprockets will not be noticed at all.