Fancy a 2+bhp increase for nothing ?
Posted: Sun May 29, 2016 9:58 am
How many of you read the fascinating article by Darrel Taylor on basic budget tuning in May edition of Scootering ?
I bought the mag on a whim a couple of weeks ago to take with me for a Hospital appointment. I don't know about you but the thought of handling Hospital magazines fills me with terror when I think about all the germs that must cover them yuk... As I got seen right away I never did get to read the mag until today.....anyway I digress.
If you haven't read the article I strongly recommend that you do so. It won't perhaps appeal to those that prefer to spend lots of money bolting on new shiny performance bits but for those of us, like me, that like to understand how things work and get the most out of what you've already got , its a real eye opener.
Just by measuring the squish accurately and reducing it slightly Darrel found an extra 2.2bhp ! and 0.6 torque ! Thats staggering. If you bear in mind that a new series 3 Li150 was reckoned to have 6.6 BHP output.
An increase of 2.2 bhp would match a new SX150 or a GP150 or almost the output of a series 3 TV175 ! potentially for nothing more than getting your squish right.
How about this shocker. Replacing the standard 22mm carb for a 26mm one and rejetting on a dyno produced zero appreciable gain in power on a standard Sil 200 engine !
The article is to be part of an ongoing series and I cannot wait to read it.
I bought the mag on a whim a couple of weeks ago to take with me for a Hospital appointment. I don't know about you but the thought of handling Hospital magazines fills me with terror when I think about all the germs that must cover them yuk... As I got seen right away I never did get to read the mag until today.....anyway I digress.
If you haven't read the article I strongly recommend that you do so. It won't perhaps appeal to those that prefer to spend lots of money bolting on new shiny performance bits but for those of us, like me, that like to understand how things work and get the most out of what you've already got , its a real eye opener.
Just by measuring the squish accurately and reducing it slightly Darrel found an extra 2.2bhp ! and 0.6 torque ! Thats staggering. If you bear in mind that a new series 3 Li150 was reckoned to have 6.6 BHP output.
An increase of 2.2 bhp would match a new SX150 or a GP150 or almost the output of a series 3 TV175 ! potentially for nothing more than getting your squish right.
How about this shocker. Replacing the standard 22mm carb for a 26mm one and rejetting on a dyno produced zero appreciable gain in power on a standard Sil 200 engine !
The article is to be part of an ongoing series and I cannot wait to read it.