I used a Jolly Moto design slightly moded, got another forum member to run it through Moto software and should give peak power at 10200 rpm with a fair bit of over rev, power should start coming in at a little over 5000 rpm, so a little more peaky than Jolly Moto.JanBros wrote:what formula's did you use to calculate the exhausts ?
On a mildly tuned engine it should do just over 70 bhp or around early to mid 60 rwhp, but allow for some major tuning and should see 75 ish rwhp.
For the cones it was a simple program, enter in dimentions and print each cone, then cut it out and roll.
This is just a rough set as cutting by hand is far from accurate, I will be getting them machine cut as the software saves the cones as CAD files, this way they should all meet when rolled and then weld up nice. Welding 0.8mm along edges is very tricky and does want to blow holes alll the time, so when the joints dont match 100% its a nightmare. So these look like bird poo (but its a first rough set)