Technical uprated/double valve springs

[CLXCraig]

Indeed. The book -- now out of print -- is the best tuning book I've read so far.

Would this be the said book?

http://cgi.ebay.co.uk/GUY-CROFT-Mod...e_ET?hash=item22fb947427&_trksid=p3286.c0.m14 (#150249698343 if link didnt work)

Silly price, sorry for OT

 

[fingers99]

Would this be the said book?

http://cgi.ebay.co.uk/GUY-CROFT-Mod...e_ET?hash=item22fb947427&_trksid=p3286.c0.m14 (#150249698343 if link didnt work)

Silly price, sorry for OT

That's the one.

 

[signwerx]

!

 

[randomizered]

Considering thats protected by copyright law, and GC is very anti-piracy, and protects his IP, I recommend you edit your post and don't offer it about.

 

[fingers99]

Wise. I have it anyway. GOK why they don't reprint it, although I'm not absolutely sure that the eBay/Amazon prices are truly realistic.

 

[signwerx]

Ah Kritip!

Seicento is now on the road. What you running in your sei these days?

There is a seperate thread with all the car pics in if you are interested.

 

[fingers99]

Not really another way of opening and closing your trusty valves on an F1 engine. The speeds that we class as rev limits and what they call an idle!

Well, the Ducati MotoGP bikes rev to 19k (some say 20k and that the tach is doctored to keep legislators at bay -- as I understand it, 20k is not illegal in Moto GP, but a rev limit might be seen as desirable by the Japanese and they could certainly apply pressure). Yamaha were not remotely competitive (even with Rossi) until they went pneumatic.

Given that yer average 8v FIRE engine owner can't be arsed to check valve clearances at 40k, GOK what would happen if it had to be done every 6k a la Ducati.

 

[signwerx]

One of my customers is Scott Redding, we have been doing his graphics work for years, since he was with Monster Mob.

I will ask his opinion on the whole desmo argument and see what he has to say.

If you manage to get a desmo setup together for the fire engine, let me know and i will put in an order! Until then, i will grab myself some double valve springs and try and rev to 8000 without setting my teeth on edge.

 

[fingers99]

Seriously, I won't be doing it! The engine, methinks, doesn't have the bore/stroke characteristics to justify it. And you'd need something like a 6 figure development budget -- new head casting, new camshaft, those lovely little forged rockers and the patent settlement with Ducati..........

Maybe more remarkable than the Moto GP bike is the fact that the Ducati Superbike -- a V twin, FCS -- still beats the shiite out of the 4 cylinder Japanese bikes on the track.

An easier gain might be ditching the shim in bucket design for an Alfa style shim under bucket. Makes servicing a PITA, but should reduce valve train weight a fair bit.

 

[signwerx]

May be a way of going.

I will see what Guy Crofts come back with. May be more to gain by lighter vave tops and collets. and possibly different valves with thinner shafts.