i want to change the cams in the 91 saph 2 ltr twinky to help it rev abit more freely without loosing torque ( talk about wanting your cake and eating it )

does anyone know a good company that can either regrind cams or know of a company that doesnt charge £500 per cam ?? as i'm trying to do it abit cheaply as the recession is still squeezing me a little

also if i was to change my cams what would i need to change/modify/upgrade

also i'm thinking about lightening my flywheel does anyone know where i can get it done and again is there anything to look out for if i do so ?

all advice welcome

 

I assume rev more freely is just that, and you don't mean rev higher, as this would be likely at the expense of torque lower down.
You can certainly have the cams reground, and is around £65 per cam, only the inlet needs doing though, IF you have enough valve piston clearance to cope with increased cam lift ?
This will be mainly mid range and top end for a fast road cam profile regrind, but headwork would increase it every where even at bottom end, but costs a lot more.
Lightening the flywheel is a very cost effective performance improvement, it will be balanced afterwards, but this will improve it everywhere, losing inertia will have a knock on effect pulling away however, where you will need a few more hundred rpm, and need to feed in a bit more gas pedal pulling away.
For all the above I personally use B E Randall's, of Hepworth, Near Diss, 01359 251888.
There should be enough base circle to be able to regrind your cam, but not sure on your particular engine.
tabetha

 

Oh right so basically if i do the lot eg grinding the cams and lightening the flywheel and have head work done it'll a lot quicker ?

 

Depends what cam you're after, if you just want fast road you could probably get away without putting cut outs in the piston and you probably would use standard valve springs, if you want sporty cams you will need valve springs aswell and the head machined to get the correct spring heights (probably about 200 quid for that) i recommend Kent Cams, they've done wonders for us, Del is a genius. You'd probably have Vernier Pulleys on it aswell to dial the cam timing in perfectly. Lightening a flywheel, just take it to an engineering shop, that's what we do, the clutch sits in a stepped bit on the flywheel, that must be kept there you can't just machine the whole lot flat. It depends on how much you take off it doesn't need to be balanced after although it is better too.

 

If you can get a regrind done on your existing cam, it will be cheaper and unlike a new cam it will be work hardened due to heat cycling, so would be a much better option.
The flywheel will need rebalancing, any out of balance will be felt every where, and as it is the heaviest item attached to the crank it will also cause the most bearing wear if out of balance.
But yes getting the lot done will work wonders on most engines, better on some than others, if I was only going to do one thing it would without a shadow of a doubt be flywheel lightening, by a hell of a long way.
I would advise you speak to a decent head porter re any head mods, the people I use do all the things mentioned, as well as having several engine and chassis dynos, so they see results they make.
I'm not at all familiar with your engine, but there's nothing to choose between any of the big names in cams if wanting new, personally that would be my last choice.
I must have had 20+ cams reprofiled over the years, not had a single failure, even on dry fuel engines.
tabetha

 

Oh right cheers guys I'll get the flywheel done first I think then go from there

 

You'll be surprised how much more responsive it is.

 

Awsome I'm looking for places round my area that might be able to do it for me and getting quotes etc gunna head down to my old engineering college and see if my old tutor will do it then get it balanced

 

I'd make sure he's experienced in flywheel lightening, they can explode, and will go through the bell housing and car bodywork(trans tunnel etc) before sometimes embedding themselves in people or taking off feet in rwd ones!!
tabetha

 

Ahh ok i'll ask him first lol

 

This made me think, when you sit in a Mini, if that flywheel does let go, that's going straight into your bollocks!

 

It's not whether the Engineer specialises in flywheel lightening, it's up to the customer to tell them how much to take off.