KZ Turbo Usage History

Les, what is your cam timing? Mine is set at 110/114 using the stock cams.

BTW, my gearing is 15/33 with only a 2" over swing arm - I suspect you are running a little taller gearing - and a much longer swing arm.

Wow, tall timing! Most don't go there. 111/114

Gearing, 18/38 and 4" over and I'm a little lower on ride height. Close on gearing, I'm a little taller there. Big end charge is crazy!

Les

Usually run 16 x 33 ratio. currently 15 x 33

Hey Les Didn't ATP make a street kit with the T 25 turbo ? And the race kit was a 40

Cant wait till we get a chance to go riding :evil: :evil: :evil: :evil:

We had better find entertainment for the lady's for a couple hours! Mine likes antiques! FYI, we both have expensive taste so it might be an expensive weekend! LMAO

Les

Yes I was a race application engineer for North America. I know turbos and the engine combinations they are attached to. I have done a fair amount of low bench work, but nothing like Larry I am sure. The whole reason I have started this post is because I was looking to narrow the range down so I can focus on gathering maps so I can do my modeling on it. I know Holset data like the back of my hand, but there is no clean comparison or compatibility matrix from Holset to Garret or Borg Warner frame sizes...

Cory

les holt wrote: Wow, tall timing! Most don't go there. 111/114

Gearing, 18/38 and 4" over and I'm a little lower on ride height. Close on gearing, I'm a little taller there. Big end charge is crazy!

Les

Is that 530 or 630?

530 dRZ2 pure drag race chain. Already wore out and will be replacing when the new chain gets here

Les

les holt wrote: 530 dRZ2 pure drag race chain. Already wore out and will be replacing when the new chain gets here

Les

Thanks Les. Don't happen to know the diameter of the rear tire do you?

Cory,

Those are some credentials you've got I would enjoy a conversation sometime.

do anyone use sidewinder chains? Iam running a rear sidewinder sprocket.

les holt wrote: My theory is, boost is a measurement of restriction, less restriction and the same amount of boost means way more airflow, more airflow, more horsepower. All that without the added heat involved it would take to make it with restrictions and adding the necessary boost to achieve the same amount of power.
Les

This is why a Busa can make twice the power at the same boost.
That and combustion efficiency reducing the amount of retard needed to live.

gearheadmm wrote:

les holt wrote: My theory is, boost is a measurement of restriction, less restriction and the same amount of boost means way more airflow, more airflow, more horsepower. All that without the added heat involved it would take to make it with restrictions and adding the necessary boost to achieve the same amount of power.
Les

This is why a Busa can make twice the power at the same boost.
That and combustion efficiency reducing the amount of retard needed to live.

Exactly!

As for rear tire dia., Don't know but sure it's a little shorter than the stock kz 18" setup. 180/55-17 Michelin Power One 2ct. it's taller than the dunlaps and shinkos of the same size by but a bit.

Les

Street Fighter LTD wrote: Usually run 16 x 33 ratio. currently 15 x 33

Hey Les Didn't ATP make a street kit with the T 25 turbo ? And the race kit was a 40

Cant wait till we get a chance to go riding :evil: :evil: :evil: :evil:

:blink: I sold and installed plenty of ATP kits in the 70's..... :evil: honda kits were b series rayjay was for less than 900 cc...... :dry: F series rayjay were 900 cc and up.......
both street and race kits for z's were F flow ..... F 40 single feed bearing for the standard street kit and F 40 dual feed bearing was for the race kits ( more oil feed holes in the bearing sleeve).....i know on the kz 550 atp kit they used an ishi turbo ....really tiny :lol: