I was going through the Amal Carbs listen in Hitchcock site. I found a series of carbs which are 36mm.Are you talking about these? http://www.hitchcocksmotorcycles.com/amal_carburettors/complete/mk2_concentric#part_5055If yes, then can you tell me which ones are recommended for our AVLsThis?AM/2036/300 CARBURETTOR, CONCENTRIC, MK2, R/H, 36mm, 4 STROKEor this?AM/2036/301 CARBURETTOR, CONCENTRIC, MK2, L/H, 36mm, 4 STROKERegards,Sanket
SanketThose carbs will only help with wide open throttle, and in fact you will most likely end up losing low end torque. If you go through ACE's postings he has explains this better than I ever can i.e. it has too large of an intake port. The large intake port does not flow well at low rpm's...and the high rpm's will hurt the bottom end unless you beef it up...Free flowing air filter and exhaust will work well..the 30 mm flat slide has a big fan following here in the US too...Now for a radical idea: If you can find a head from the 350 cc AVL engine which will hopefully have a smaller intake port....that just might be the ticket...Good luck !
I didn't remove anything from the motorcycle. I ate less , and lost weight.
A friend who swapped con-rod said that they do? I was assuming that he was right. But if he isn't then no other go But even with no outer race do you think UCE con-rods are better than AVLs?-Sanket
Next stage will be sourcing new UCE crank - Looks like the UCE motors use same AVL crank and con-rod with hardened outer race.
I was actually talking to Vivek and he said that UCE con-rods are slightly better so we talked about the outer race too. I will go to indiMotard and see if they got any spare UCE-Con-rod
If you have the resources, you can probably get the Hitchcock's 535 high compression piston for the AVL. More cc and higher comp as well !..........
For most affordable results, do the BW piston mod, the way he specifies it to be. It's the "best bang for the buck".However, for those with more resources....The world has changed.Just use the flat top piston, and this ACE big-valve modified chamber for improved combustion efficiency, 9.8:1 compression ratio, proper squish, better flow, and more power .
how much does a head like that run?
Interesting, who has the necessary cojones/$$$/time to take this on? If my next project goes AVL instead of Big Head I will be sorely tempted.Regards,A.
I would say that in a "full-house" AVL build as described, it would be suitable to use a TM34, or even a 35mm or 36mm carb to get all the revs that it could utilize with that stuff.
A lot depends on the way it is ported.We use the carb as the primary restriction. It is the smallest cross section in the tract, in the way we do it.Others put the primary restriction in the port, and use a larger carb.This ends up with different size carbs for the application, depending on how the builder approaches the inlet design.
This is what is going to give that elusive 40+hp figure that was alluded to when the bike was introduced. We pull more torque out of it with more flow, more compression, better combustion, increase the lift and duration to increase the rpm capacity, and push it to 7000 rpm, and you'll get your 40hp at the rear wheel, which will be around 47hp at the crank. Essentially, right about the same specs as a Norton Manx 500.
47HP , that's impressive ! . Is it just me or does the AVL head resemble the old Fury head? .
Wow, that sounds very cool ace.Do you think the AVL or UCE bottom end can handle that?
are the ace cams better than the S cams in this application? I've already made the decision to keep my avl enfield for ever, which means im definitely going to dump excess money into it in the very near future. Nothing in life would make me happier than a 40 hp custom cafe enfield.
All this with the stock Ignition timing ? or any changes to the stock TCI?