(02-06-18, 01:21 AM)Kenbob link Wrote: I must admit though that I would’ve expected more than 134 bhp and 78 ft lbs of torque, sounds like stock figures.On Ivan's website the standard bike dyno curve peaks at just under 122bhp with about 70lbs torque. Assuming that the OP has standard headers and a more open end-can then his printout reads well.... if it were measured on the same dyno.
But for maximum ponies I believe the MB kit needs a full exhaust system (headers as well as an end can) to reach peak power of around 140bhp. But the price to pay for fitting a full system is losing some of the low-down torque, which would translate to a more disappointing experience on the road. So keeping torque and 'only' making 135 hp sounds like the best of both worlds.
It is however true that 13:1 usually represents running rich, 13.5:1 or thereabouts would be closer to ideal. Then again, assuming everything is fitted correctly Ivan must have had compelling reasons for settling on his jetkit running rich.
Edit: Just adding this from https://www.turbobygarrett.com/turbobyga...ch_vs_lean :
Generally, normally-aspirated spark-ignition (SI) gasoline engines produce maximum power just slightly rich of stoichiometric. However, in practice it is kept between 12:1 and 13:1 in order to keep exhaust gas temperatures in check and to account for variances in fuel quality. This is a realistic full-load AFR on a normally-aspirated engine but can be dangerously lean with a highly-boosted engine.
Rich usually means more fuel consumption - what sort of mpg is the bike delivering compared to pre-jet kit installation?