Gen1 Busa Piston Upgrade

[Bigdon]

will i have any issues upgrading to a 12.0:1 piston set from the stock set at 11.0 :1 (Stock engine on pump gas )

[202mphbusa]

will i have any issues upgrading to a 12.0:1 piston set from the stock set at 11.0 :1 (Stock engine on pump gas )

Shouldn't be a problem for minimum cost 84mm is a better option

[Bigdon]

Shouldn't be a problem for minimum cost 84mm is a better option

84mm at what compression ratio?

[Rojo]

Thread '1397'

May 22, 2007

A local racer has a 1397 he was running but decided to go turbo. He wanted to do a stage 1 turbo so he needed a stock Busa motor.  Well, after some wheeling and dealing, we struck a deal.  I'm in the process of installing the new mill.  I know the racer and the motor, so it's all good.

It dyno'd at 203hp and 99Tq at the rear wheel at Lee's with a sidewinder on the old bike. I'll be needing to get it tuned. Thinking of taking it down to 4th Generation to have them write a map.

I can't wait!!  

• GMbusa
• Replies: 36
• Forum: General Bike Related Topics

• 

Is there a reason why you want to get higher compression 81mm pistons ? *

[202mphbusa]

84mm at what compression ratio?

I ran 13-1 on the street for about 4-5k miles before I went turbo
and did NOTHING other than stuff a spacer plate under the Block

[Rojo]

Thread 'Piston Question, Wossner vs OEM'

Jun 5, 2013

I just had my turbo rebuilt (it was puking oil into the exhaust) and the shop stated that there was some melted aluminum on the exhaust tubine blades. He stated that it us usually an indication that there has been some detonation or pre-ignition (make sense) and I may want to check my pistons. My question is, IF there is damage and I need to change pistons should I go with the Wossner 9:1 or the OEM. The primary use for the bike is on the street. My bike is a stock '99 with a Hahn kit (Stage 1?) running about 10 PSI of boost, 91 octane fuel (we can't get 93 here), water injection and...

• Road Weazel
• Replies: 20
• Forum: Turbo

Looks as though you can get cylinders for your Hayabusa already bored for the piston kit you order from Ryan Schnitz. *