Tuning Cam

[rallycinq]

As in dont work outright, or dont work as in no gains from it?

And i wouldn't even think about doing anything like this, fitting the cam is one thing, but this is over my head.

As in, don't improve the performance.

A badly or inappropriately fitted mod can produce worse performance than standard.

When i were a lad I spent hours ensuring that my car ran absolutely perfectly, I couldn't afford any mods or the insurance. So the plugs and timing were checked every week, carb was checked for adjustment etc etc.

Cheers

SPD

 

[fingers99]

Not as far as i know, even people with 200bhp+ NA and 300+ forced induction keep hydrualic?

Well, the forced induction ones probably are not revving high enough. It's a common mod on K Series race engines.

And what about headwork? Could i just take the head to QEP, Hiflowheads or LAD engineering?

You could. But I'd take it to Guy Croft or GSR. Experience with a particular head counts! Won't be cheap!

What gains does the cam over standard? And this whole shimming thing sounds very risky? Actually grinding part of the cam down doesn't sound like something i would want to do DIY. But i don't really know enough to make a decision

As Rallycinq says, you grind the shims, not the cam (but I just get new shims). Grinding the cam would rather defeat the object. I thought you knew about cams?

The Punto 75 is basically a Punto 60 with MPI, a slightly better exhaust mani and the cam. I'd say 6-8 bhp.

 

[James7]

Well, the forced induction ones probably are not revving high enough. It's a common mod on K Series race engines.



You could. But I'd take it to Guy Croft or GSR. Experience with a particular head counts! Won't be cheap!



As Rallycinq says, you grind the shims, not the cam (but I just get new shims). Grinding the cam would rather defeat the object. I thought you knew about cams?

The Punto 75 is basically a Punto 60 with MPI, a slightly better exhaust mani and the cam. I'd say 6-8 bhp.

6-8bhp is a good gain as far as i am concerned

And i do know a fair bit about them, but never came accross this before

 

[jasonh131]

hi all , i already had the stainless janspeed and induction bit , put with standard 4x4 cam runs out of steam early , slapped a 75 cam in and tranformmed it wisses round to rev limmiter and much more torguey lower down ....
had a spare 36mm trottle body bored out to 40mm , just got to find a butterfly hope the doce webber one fits from the local tuners or i m stuffed
whats anyone else used for TB..