Performance cam question

[MackyM]

Does a cam upgrade always compromise torque to achieve more power - not to mention low rev drivability? Is there a cam which increases torque and power or is such a thing impossible?

[rubjonny]

I'm afraid so, you cant have both.  This is what the V-Tec system is for on jap boxes, it tries to give the best of both worlds.  low down drivability but you can rev the tits off it if you feel like it

Best way to go is a larger capacity bottom end combined with a cam

[KINGS>]

i brought a gs2h kent cam with a vernier... when dialed in with correct ign timing it shows good gains, but as said with a 2.0l bottom end too it'l be a flyer

[MackyM]

I'm afraid so, you cant have both.  This is what the V-Tec system is for on jap boxes, it tries to give the best of both worlds.  low down drivability but you can rev the tits off it if you feel like it

Best way to go is a larger capacity bottom end combined with a cam

With only partial success - my Civic VTi and Accord Type R were both fliers, but there wasn't much flexibility (in fact the civic had none at all). I am having the 2.0 bottom end I think - but having done a search on here it seems you need to worry about oil pumps and uprated valves, etc. to support the cam upgrade (cams -  mine is 16V). I guess I stick to the bigger lump and get it properly set up on a RR. With an exhaust and filter I reckon it might hit 170 brake? Does that seem unrealistic?

[rowlers]

I was told by TSR that a valver is good for 180 with ported head, cams and stainless zuast.
add a 2.00 bottom and and you'd be looking at 200!!!

[monzablue16v]

Not sure about that rowlers I have a 1.8 16v polished and ported head 4 branch stainless manifold and exhaust, drilled airbox (good for 15bhp )  and it's 149bhp at the wheels I can't see dropping in a set of cams making it gain 31bhp I was told cams on a valver will make a slight power difference, I find the standard KR cams to be fine not too lumpy on idle and it sits down and launches at 4200 rpm low end driveability is fine.

Mini with race spec engine and some wild cams paddle clutch lsd etc was an absolute b!tch to drive around town or in traffic. when the cams are off it has such a strange idle it sounds like it's going to die at any point!

[rowlers]

must admit I was sceptical! £149 at the wheel will be good enough for me!

[rubjonny]

Apparently the 2.0 16v abf will hit 170 with just a new chip, I've been told they were limited from the factory to prevent them hurting VR6 sales!

[MackyM]

Pardon my ignorance, but if I keep my 16V head and mate it to a 2.0 16V bottom end how can I chip it? I don't have digifant but mechanical injection, so how does changing the lump allow chipping? I was hoping for 170 with standard ecu, 2.0 lump, zorst, filter, and some RR tweaks (I know a genius in that area).

[jims13]

you cant chip it , that would invole, swapping to later loom to run mk3 managment , getting rid of the kjet and loads of other stuff.

ive got me 4 banch back on now, with my new ashley exhaust. it ran like crap, so i went out adjusted the dizzy until i heard the dreaded pinking sound then backed it off a bit, ceratinly goes better now. 

go for the 2.0 bottom end , any 9a or 6a lump will do, get a decent exhaust and 4 branch and take it to ray , let him play with the fuelling and im sure you will be happy. 

i would have thought , 170@ fly on kr head,standard cams with the 9a bottom end and zorst etc ,is achivable.

my ten pence worth

jim