Look good

 

why raise the engine displacement by 10% ?

 

It was a suggestion from a fellow on Htt, to get me started in the absence of any available maps for my new cams. I guess it ensures that the VE tables don't max out. Just until I can schedule the tune

 

or maybe it is just the be sure that you don't run too lean ?


I wonder if there is changes to do on a map when compression ration is raised ?
Asking this cause i get a canned map from dynojet for the 57h, but 'ive raised the CR a little...

 

frederic CM I think raising ci may do something to the fuel delivery/injectors

ie. more fuel

as you raise compression the timing would decrease slighty

 

that's what I thought thx
How much should I retard the timing ?

 

if you read up on high performance engines you will start to find figures (the megasquirt document a good read)

you probably addressing timing in the 4500-6000rpm range, 70-100kpa

probably 2-3 points, you dont want knock/ping which generally indicates too much timing,

 

I have been running autotune sessions on mine after cams, heads and compression bump and the bike is running really, really well!

I used a 57h base map from Fuel Moto and have only done three autotune runs so far, capping the values as they are coming in over the 127.5 limit. I'll keep doing this with more autotune sessions until it's properly dialled in.

I am extremely happy with this setup right now - the bike just keeps on pulling with no end in sight. It gets from 60-90 much quicker and overtaking is effortless. No popping on decel either.

I will get it dyno'ed in the future, but will buy a larger throttle body first as right now I have the stock 46mm unit and I know that can't flow all the air that the heads can handle.

 

adm, what is your final build specs ?

 

Well, I left it at 103" (I might do one of the bolt in 110 kits next year though)
Heads got a "Pro Port" job from Fastlane Head Work: http://fastlaneheadwork.co.uk
Andrews 57h cams
Lifters ended up being Gaterman GP1023 ( I had Comp Cams 850-1s originally, but one was ticking away so I swapped to the Gatermans as I found some new old stock ones.)
Pushrods are S&S Quickees
0.030" Cometic MLS head gaskets
Static compression looks to be 9.90:1
Corrected compression is 9.2:1
CCP 190.6 @ sea level

Other stuff - the air cleaner is a DK Customs Outlaw 636v and the pipe is a D&D BobCat.

The bike is a blast to ride!