2 replies to this topic

[JLF]

I own Zcars running a K2 GSXR engine. In order to achieve more power I am thinking of replacing the GSXR engine with a 2008 Hayabusa.

For those who are running Hayabusa cars what has the reliability been like? Also how have you found the hydraulic clutch system in a car? I have replaced the GSXR cable clutch with a hydraulic clutch and it has not been good. Given the Hayabusa is hydraulic I am nervous about over exercising the clutch (slave cylinder) in any kit car? Also any views on strengthening the clutch?

I could put a turbo on the GSXR which is cost effective….anyone ever done this?

[z cars chris]

the swap to a hayabusa is generally a good move
its a much stronger engine altogether than the 1000
the clutch will stand enormous amounts of abuse there are upgraded parts available for them and they are easy to fit
the monte carlo turbo we built for hill climbing has run for over a year on the same clutch and is running 10 inch wide super sticky hill climb slicks
we ran numerous hayabusa powered grass track cars before building the minis they were savage with the clutch holding the car on the rev limiter in 1 st gear and side stepping the clutch again clutches would last a couple of seasons of this type of abuse before needing new plates
hydraulic wise the gsxr 1000 was cable operated this caused some problems getting a nice feel for the clutch if it was fabricated up like some ive seen
the std master cylinder is too big for the clutch slave cylinder on a std hayabusa set up so we use a smaller bore master cylinder which works very well
i can leave my race car on tick over and set off without stalling quite happily
gsxr 1000 owners we now can supply a hydraulic conversion which bolts straight onto the casing and then can be plumbed to the master cylinder
the 2008 hayabusa is a trick piece of kit with 200 bhp as opposed to the earlier hayabusas 175/180
its 1340 cc longer stroke and has 8 injectors
the grasstracking boys i know have been buying engines from powertec and extreme engines paying £3000 for a std engine then another £5000 tuning it to get 204 bhp
this year the std 2008 powered cars have been very competitive with no tuning parts on them at all
im putting one into the works z car for next season to add a little more pep to the old girl in the dry
if you talk to the guys racing the superbikes they get through quite a few gsxr 1000 engines due to blowing them up they are a little fragile in the rod department
i wouldnt want to stress them with a turbo without some serious mods to the rods/bottom end
chris

[JLF]

Thanks Chris. Will have a chat with Richard in the next couple of days.