Billet Kawi Porn

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Don 79 TA

Still Fat....
Location
Madision/Huntsville AL
you making a non-powervalve setup for the SXR?
will the wet pipe manifold fit without a problem?
will the stock exhaust system work out?
it does seem like a fair price for everything mentioned
i know personally i'd rather go to something like this versus porting out the existing cyl
 
wsuwrhr

wsuwrhr

Purveyor of the Biggest Brapp
Location
Alta Loma, working in Upland
Don 79 TA said:
you making a non-powervalve setup for the SXR?
will the wet pipe manifold fit without a problem?
will the stock exhaust system work out?
it does seem like a fair price for everything mentioned
i know personally i'd rather go to something like this versus porting out the existing cyl
Click to expand...

We certainly could make a non PV, just like we do for the Yamaha, it would be cheaper as well.

Don't have an answer for the two pipe questions, I would have to ask Kyle on that.

Brian
 
D

Don 79 TA

Still Fat....
Location
Madision/Huntsville AL
ok thanks
keep us updated, maybe it's info others are looking for

also.. not to hi-jack, but what about making the 89mil cyl for the yamaha in a 5mil stroke non-powervalve?

i'd like to step into 900-950cc range in replacement of my current 5mil 85.5mm setup
 
alfmatic

alfmatic

Location
Poland
Hi.
I just start rebuilding my 750sx.
I have 82mm bore and was thinking about changing sleeves and do 85mm.
Now when DASA made PV cylinder I have ?????? :)
Does it fit to my case?
What changes are necessary for crank case?
What difference I will notice if I use DASA 84mm power valve cylinder not standard cylinder with 85mm bore?
Is it possible to use bigger pistons then 84mm, and if yes what is the biggest diameter?
How many power horse can I expect with Total Loss, Dual 48 carbs and biggest possible pump gas compression on 84mm DASA PV?
How big difference in freestyle power will be on kawi engine if I use 4mm stroker with DASA PV?

How much heavier is PV cylinder then stock one?
My dry ski weight 276lbs.
 
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MTRHEAD

MTRHEAD

Location
MotorCity
Millertime said:
What are the limiting factors in the stroke on a Kawi. On the Yamaha twins it used to be 5mm, 6mm, 8mm and now years later we are hearing 10mm,12mm, 16mm ect.. Is it possable to skip a few years worth of waiting and go right to the big chit or is there not room in the OEM cases for this kind of stroke, or is it a demand for a differant rod, ect ect.
Click to expand...

Now that is an awesome quote! just think of all the crap from the 90's on carb size ....A real limited has to have 48mm Novi's or bigger today.

You can go 79mm no problem with the right rods. My 76mm cleared without any machining in the cases, GPR rods, and if you use Honda 85' CR500 rod's 79mm will work with just a couple mm's removed. I've seen one 80mm stroker with still a touch a meat in the bottom.
 
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2

2XLR8

X-
I know there are people waiting for the non power valve big bore SXR cylinder. Making it non power valve will bring the price down to attract a new group of customers. I feel if the porting is where it should be and you don't need to spin it to very high rpms then you don't need the power valves.
I hope it get released.
 
wsuwrhr

wsuwrhr

Purveyor of the Biggest Brapp
Location
Alta Loma, working in Upland
2XLR8 said:
I know there are people waiting for the non power valve big bore SXR cylinder. Making it non power valve will bring the price down to attract a new group of customers. I feel if the porting is where it should be and you don't need to spin it to very high rpms then you don't need the power valves.
I hope it get released.
Click to expand...


The powervalves are for low to mid RPM operation. Not the other way around.

Powervalves have little effect on the engine in the upper RPMs.

Brian
 
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wsuwrhr

wsuwrhr

Purveyor of the Biggest Brapp
Location
Alta Loma, working in Upland
A billet stock stroke crank will fit in your case.

A 4MM stroker will need to have the case clearanced slightly for the rod.

Using a powervalve will help to make more low to mid RPM power.

We will be releasing a big bore 89MM version of the cylinder, but this engine is still in testing.

Using a stroker crank will increase the bottom end even more.


Brian


alfmatic said:
Hi.
I just start rebuilding my 750sx.
I have 82mm bore and was thinking about changing sleeves and do 85mm.
Now when DASA made PV cylinder I have ?????? :)
Does it fit to my case?
What changes are necessary for crank case?
What difference I will notice if I use DASA 84mm power valve cylinder not standard cylinder with 85mm bore?
Is it possible to use bigger pistons then 84mm, and if yes what is the biggest diameter?
How many power horse can I expect with Total Loss, Dual 48 carbs and biggest possible pump gas compression on 84mm DASA PV?
How big difference in freestyle power will be on kawi engine if I use 4mm stroker with DASA PV?

How much heavier is PV cylinder then stock one?
My dry ski weight 276lbs.
Click to expand...
 
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wsuwrhr

wsuwrhr

Purveyor of the Biggest Brapp
Location
Alta Loma, working in Upland
Don 79 TA said:
you making a non-powervalve setup for the SXR?
will the wet pipe manifold fit without a problem?
will the stock exhaust system work out?
it does seem like a fair price for everything mentioned
i know personally i'd rather go to something like this versus porting out the existing cyl
Click to expand...


Kyle says the stock exhaust will not clear the powervalves.
 
dbrutherford

dbrutherford

Parts Whore
Location
Fairmont, WV
What about the FPP wet pipe for the SXR?

Also what's your take on the adapter plate and then using a Yamaha type manifold?

I was curious why you guys used the SXR exhaust manifold style instead of the Yamaha style? The japanese SXR big bore cylinders use the Yamaha style manifold.
 
2

2XLR8

X-
I was saying if you have the ports set up for bottom end and you don't squeeze a lot of rpms then you would not need power valves. In my opinion power valves are to achieve better bottom end BECAUSE the exhaust port is higher than it should be to offer the best bottom end response. Using a little more compression,maybe a tad shorter impeller and using a stroker crank will help. The response should be much improved just by the increase in the cc and having a bigger bore also allows more port mean area.
I have seen many sea doos that have power valves not even have the spring on the rave valve. once you install it it does not make a very big difference. This on a stock setup. The GPR 1300 got rid of the power valves all together. And many 1400 cc plus lock the power valves. Ignition timing curves can also help make up some bottom end.
 
wsuwrhr

wsuwrhr

Purveyor of the Biggest Brapp
Location
Alta Loma, working in Upland
I agree with some of what you are saying, everyone has their opinions on several key aspects of motor design.

Brian

2XLR8 said:
I was saying if you have the ports set up for bottom end and you don't squeeze a lot of rpms then you would not need power valves. In my opinion power valves are to achieve better bottom end BECAUSE the exhaust port is higher than it should be to offer the best bottom end response. Using a little more compression,maybe a tad shorter impeller and using a stroker crank will help. The response should be much improved just by the increase in the cc and having a bigger bore also allows more port mean area.
I have seen many sea doos that have power valves not even have the spring on the rave valve. once you install it it does not make a very big difference. This on a stock setup. The GPR 1300 got rid of the power valves all together. And many 1400 cc plus lock the power valves. Ignition timing curves can also help make up some bottom end.
Click to expand...
 
X

-XXX-

Location
PA
WOW, over 8,000 views!!! Obviously, there is a lot of interest in these beautiful billet DASA cylinders!!! Fine craftsmanship. Well done!!!
 
wsuwrhr

wsuwrhr

Purveyor of the Biggest Brapp
Location
Alta Loma, working in Upland
I wish I could, a few problems present themselves.

I don't have a tripod and not nearly enough memory in any of the cards I have.

DASA runs a pretty tight ship and not alot of extra bodies around. I run my own shop as well as manage DASA's CNC machineshop, so when DASA's machines are running I am working in my own shop.

In my opinion, not alot of cool stuff can be seen happening with the coolant splashing around. Machining done properly is a pretty violent process, it really isn't possible to film it since not much can be seen.

It would be something that would be really cool, but just not feasable.


Brian

-XXX- said:
Brian, do you thing we could see some C.N.C footage of the machining process?
Click to expand...
 
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