verner pully...modified??

[diablo007]

need some info on a verner pully....can the standard pully be modified to suit?

[Adam]

Yeah, drill/cut new holes/a slot.

[mad-driver]

Then try and write in very small writing the number of degrees you will be turning it lol

[Stanley]

so do you elongate the holes?

only really for use wih an aftermaket cam yeh?

[mad-driver]

The point of a vernier is so you can easily change the cam timing, ie if you have a high lift cam

[John]

Erm so how do you intend to make your standard pulley adjustable? Have i missed something Lol!

[mad-driver]

I thought they had a woodruff key behind them or something which meant you couldnt turn them?

[Adam]

Erm so how do you intend to make your standard pulley adjustable? Have i missed something Lol! Make a slot that the pin can slide in, voila, adjustable pulley.
Just make sure its all bolted up tight. ;)

[John]

er, yeah, the whole idea of a woodruff key is to locate the pulley into a groove on the cam. Don't think the nova cam has a woodruff key though.

So you make the pulley adjustable by removing/elongating the locating peg? Doesn't sound very safe to me! Think i'd save some money and buy a decent vernier instead of risking cy head damage. the cam pulley bolt should always be torqued up. How is the timing then checked when the homemade pulley is adjusted?

[Adam]

Nova cam just has a locating pin.
If you elongate the hole that the pin sits in on the pull you can adjust the pulley.

I'd say the pulley bolt would hold it no problems, i've had to hammer cam pulleys off before.

[John]

Yeah but aren't the cam pulleys on a chamfer?

[Adam]

Think so yeah, but they should fit on in any position with new location holes/a slot.

[John]

Right so how do you adjust this homemade pulley to maximise the cam performance? And how do you know how many degrees the timing has been adjusted?

[Adam]

Get it on a RR, and adjust it until you get best performance, you could mark the degrees on, maybe,Lol.

[John]

What with? tippex lol!

[Adam]

Too right :) Lol

[stuartp]

as g88kag said i wontn't even think of making one! vernier have two cams in theory one bolted and tourqed to the cam and the other has the belt on all safely bolted to gether with 4 bolts? they cant move a great deal just enougth to advance or retart timing? THIS HELPS PREVENT BENT VALVES OCUIRING!!! (spelling)

[stuartp]

Wouldn't risk it i had hammer mine when the gasket went so imagine how tight it will be without it after all that trashing and dropping it down the gogs?

[Adam]

as g88kag said i wontn't even think of making one! vernier have two cams in theory one bolted and tourqed to the cam and the other has the belt on all safely bolted to gether with 4 bolts? they cant move a great deal just enougth to advance or retart timing? THIS HELPS PREVENT BENT VALVES OCUIRING!!! (spelling)
Until the vernier bolts vibrate loose,fall out, pulley spins around and wrecks your engine :thumb:

If you get a vernier, make sure the bolts are thread locked.

[John]

doesn't sound exactly cheap to me either if you have to pay for a rr sesh!

[stuartp]

If you get a vernier, make sure the bolts are thread locked.[/quote]

lol Argreedlol

[Adam]

You'd need a RR session with a vernier to get it set up too.

[Stuart]

ive got a modded Vernier on my 1.2 engine. ?10 to get a kidney slot put into the locating peg hole, slapped it on with a load of thread lock everywhere then immediately timed the cam up as per catcams requirements for X lift @ tdc...... the marks on the kent/piper pulleys mean naff all tbh as you set the cam up with X lift at tdc, or max lift @ X crank angle so there is no need for pulley marks lol.

[John]

Hmm, still think i'd save some money and buy a decent second hand vernier though.

[Stuart]

imho i wouldnt buy a 2nd hand one..... esp going on dans experience.

he ran his for nearly 10 years and as the outter ege is ally it wore away and wouldnt let the belt sit in the middle of the pulley.....

[John]

Ok, i wouldn't buy one off dan then!! Surely second hand pulleys can be visually checked for this sort of wear before purchase? But you're probably right stuart, a new pulley would be the best way to go. Still cheaper than expensive re-build due to homemade pulley failure imo Lol!

[mad-driver]

Depends if you buy it off ebay lol, and as mentioned RR sessions being expensive, i'm about to find out lol