I am thinking of lightening the crank and rotor on my project while the engine is a part. Can anyone recommend an engineer/tuning shop for this type of work. I'm in the South East area so southern part of country would be better. Thanks
www.andrewsprecision.co.uk read the website above and you'll get an answer for post 2 or for a better price midland balancing on 07768577222 So what crank or better still what crank rod and piston combinations as you need to take into account all these including the big end shells the gudgeon pin rings and even the locks that hold the pin in. Sure you could just dynamically balance the crank in isolation but its not as simple as that as you need the weight of all the above to create a bob weight for the crank, let alone the flywheel and associated starter generator stuff, throw in a balancing formula for the type of crank and you may get somewhere near...
here a picture for you of a 1198 crank versus a 1098R (1198cc) crank. 1198 has steel rods the 1098r has ti rods. throw in the heavier pistons on the 1198 and you see the size of the webs they have put on the 1198 crank to balance it ( or as near as dam it for the factory) With ti rods and lighter pistons the 1098r crank is able to be nearly a kilo lighter!! plus because its a better material they position heavier metal right where it needs to go opposite the rod pistons.
but if you are not too bothered about losing as much weight as possible and go down the route of a balance then pistons rings pins locks need to be a matched pair (sure material can be removed to make them weigh the same) rods and big ends need to be matched end for end in weight if you use the steel rods this can be done by removing material from either end of the rod then the crank can have material removed or added in the correct place to balance the whole set up. the flywheel and associated parts can then also be added to dynamically balance them to the rotating crank.
I have used these guys who are opposite Moto Rapido. They worked my 748RS crank that went into my 853 and balanced it to 0.0 and 0.1gm in 2 planes http://www.ocservice.co.uk/ Andy
Andyb no the project I'm working on at the moment is a Ducati/Raptor 1000, which is in build & projects thread. The engine is the Cagiva Raptor 1000 ie Suzuki TLS 1000, so basically the Suzuki crank etc.
Is that a yes or no to stupid question or are you all related to the von trapps please dont start singing. Let's not be nasty about other people's engines, I already have two Ducati lumps
there are no stupid questions....its just the people that ask them i have no affiliation to anyone in the balancing industry...but i have a good idea on whats required, who does it, how they do it, and what they want to charge...and i think ive been pretty accurate, precise and helpful
