"Money down the drain "
Patience Grasshopper, patience-it has been written that all comes to he who waits, and the rules for 2006 will not be decided until after Brands....................I wouldn't be selling off those carbs cheap yet if I was you....;)

John

[Edited on 1-7-2005 by Monty]

Next year...nothing has been decided yet... but head work may be allowed so that a 675 will be competative in terms of power with a 620injection...that way you can keep the 675 and race next year............... :D.....

All is not lost yet Bro.................................

Phil

Thanks.

Might as well give up now then!

Wise words from Phil!

Patience Ant ... if nothing else you'll have a lovely ornament for the lounge room.

Read Chris' post above, looks positive for you antique owners.

It's not over until the slightly-overweight rider #68 sings.....

I'm convinced that there is more usable power to come from my 674 for Donington, without resorting to headwork or anything illegal. Things like manifold matching and a change of exhaust should help both bottom end response and top end power.

Ali, IMHO your FCR41s are way too big - even my 39s are excessive given the current valve sizes (but may be useful on a 620 motor...)

Also ignition and cam timing can make a difference, but now I'm giving too much away;)

Ah yes, but the cams are different in their lift and duration.

41s are definitely too big, as we've discussed before, but I also tried the DP transducers with a different ignition curve. No noticeable difference....

Your 39s are also too big, but not by much. The real issue is the lack of a base setup to work from.

Ali

Im sure there is Paul but i shudder at the cost of the FCR's the dyno'ing the engine work the bespoke zorst set up etc etc.....just for a few bhp is it worth it when for next head work may be allowed or a split class...............:puzzled:....

Phil

[Edited on 1-7-2005 by fil2]

To right 41s are to big, basically a good smoothbore carb will flow 20% more than a CV carb, so to match the flow of the 38mm CVs you will probably find a set of 35mm flatsides is the max you will need. Also bear in mind how much power the 900SS makes with the same 38mm carbs and airbox setup.
Its the head and inlet tracts that are the restriction and as mentioned some good flowbench work should deliver good results.
Just let me at Senna3's 675 with my air grinder or maybe we can get the experts have a go over the winter.

being that I am pretty simple in techy terms, but is it not easier and cheaper to source a 620 lump and injector system etc and chuck them in the 600ss/monster frame?