tinwelp said:
Mats,
absolutely fantastic. I want one. I've been a good boy. Could I have one for christmas please if I eat all my green vegetables?
If you can fill in the holes in the torque curve it will be seriously, seriously impressive. If your data are stable enough to be able to see small effects, try playing around with the exhaust cam timing to see if your 'holes' move around too. If they do it will confirm the exhaust length needs a bit of tuning. Alternatively, play around with an adjustable length open pipe. More fun, more noise!!!
Now tell me please, where do you find your time? After a full-time job, house renovations, family and a (very small) bit of time spent playing on my bikes, I've nothing left... Do you just not sleep? What's your secret??!!
Cheers and regards... Paul
Haha, thanks Paul! The thing is, most people want hardware with this performance. Very, very few accept the cost and almost none will put in the effort in creating it! But hey, write a letter to Santa about DOHC-head/EFI and put some 3000€ in the envelope! :wink:
We changed intake length by adding 10 and 20 mm to the original design. It moved the harmonics by 300rpm at each 10 mm step. This is too large steps, but enough for the very first, real, dyno run. I'm using the same exhaust as with my previous billet head. It needs to be somewhat smaller in diameter to fit the ports. It has adjustable joints, so exhaust length can be varied almost 100mm.
Now I want to try it out on the track. I'm thinking that 6,5k might very well be in the early exit of the corner, where a smooth power delivery is needed. Closer to the exit of the corner revvs have picked up, the bike is a bit risen from max lean angle, and I normally twist the throttle to 100%. We'll see.
About the time. It is not possible to do everything yourself. In a project like this, you are very much depending on access to skilled and dedicated people. Within an hour drive, I have fx theese specialists:
http://www.mossbergs.se/
http://www.topplocksverkstan.se/
http://www.mp-racing.se/
http://www.composite-design.se/
http://www.kevamotor.se/
http://www.ebos.se/index.asp?language=eng
http://www.atomracing.se/
http://www.folan.se/
For sure, without the efforts put in by "Swedish Steel", this project wouldn't have been decided at all! Remember I'm an old fart clinging on to simple, well known things like carburettors. I needed to be convinced that the plastic bag full of wires and black boxes, really should be attached to my bike.
But most important, I have a very understanding wife! Big kisses to the love of my life, Tinna!
Ok... I confess to being a tiny bit stubborn aswell. Tiny bit.
I just went for what I thought is a safe advance but I am guessing you will want every bit of horsepower out of your engine and need the timing as far advanced as possible.
