Very OT: Engine transplant question (car related)

DanTXD wrote of engines, piston rings and shiny things:

That's VALVER POWER!

For help, press Rob.

Rubbish! Buy a low miliage or crashed bandit 1200 for hundreds.

They are missing the midrange power and physical strength because they chase the peak power figures.. They dont know any better. Even still if you want modern use a suzuki busa motor.

Old bike engines either go bang or go well. Not many have big milages so it makes no difference. And the engines are still current in the bandit 12.

Colder equals more power to a point but no they are thermostatic when big coolers are fitted. Set at about 75 drgrees tor best power.

No - we're talking about sprints / hillclimbs. Runs of around 1-2 mins .

Hmmmm, fair point, but they need stuff like cams swapping to make decent power.

No. They use smaller air box as fitted to the 600. Remove filter, remove the rubber inlet ring and file the hole out to take one from another 1100 and bin the end can. Rejet to suit air box. (its designed to be restrictive and has a steel plate welded across inside of the exhaust)

The can alone gives 20 bhp extra so 122 at the wheel. The carb rejet with the 1100 intake rubber fitted into the existing air box gives 10 to 12 more so 130 bhp no prob. With masses of midrange power! Thats why we love em!

At the wheel?!

Sounds a bit iffy to me. More like a crank figure.

I'm not being deliberately argumentative, but I don't rate that engine at all. Bindit 1200s are desperately dull bikes.

Forgot to add... They are "low" (er) compression too. Another 10 to 15bhp across the range by a simple head skim! They also rev to the same 11k freely once the head and air box mods are done. Cams are fine. Some have a pink wire that softens the timing for noise tests (and the power) in 2nd gear.

Yes AT THE WHEEL. I tested dozens of brand new ones for performance bikes and owned one! It put me in a ditch though... And I used to design build and operate the dynamometers. They are absolutely and totally mathematically accurate. Pure digital inertial dynamometers.

Download a copy here

includes a 1200 bandit power curve (with a race can only added) see for yourself. Makes a VFR look rather limp... This software and dyno was compared by john robinson of PB to several different dynos around the country including dynojet, and bosch etc All read the same within 1 percent when using the same correction factor type and figures with my 1100wp, a zzr1100 and a kawasaki 600.

Engine figures can also be produced on this dyno but they are meaningless - trust me I build dynos...

You think! They are only dull when making the 100 bhp restricted rear wheel gentlemans agreed power for "retro" bikes. Thats easy to derestrict! Then you have a GSXR1100 with 1200cc!!!

Hold on.

Aren't all official figures quoted at the crank?

Errr yes when they want "BIG" numbers. IE my 154bhp 1100wp claimed 154! It did 136 after derestriction...

But when its the other way around like the 125 limit or the "gentlemens" agreement on a)125bhp b)100 on unfaired bikes - its at the wheel!

All of which is irrelevant because the dyno just measures whats there. Did you compare a fireblade curve with a real engine (12 bandit) yet? No comparison. Both have same peak (bandit slightly ahead) but the blade motor is weaker everywhere. Especialy low down and midrange. Put up a torque curve from each and look at them! A 1200 suzuki bandit is massively stronger everywhere and even a little better at peak power.