Setting up a DASA stock stroke...

[geraban19]

Hello guys,
Ive been out for a little while dedicating my time on other toys and now I just finished to assemble a brand new SJ with a DASA std stroke PV setup but it is pissing me off...

Mods:
Dasa std stroke PV flat top.
Boyesen intake manifold w/ 3 stage reeds.
Riva Power bombs.
Oem ign w/ MSD Enhancer.
Compression is 175psi.

The ski looks like it is too rich but Im not sure if it is...

To be honest I was never happy with std stroke PV motors but my 8mm built a couple years ago.

I think it must need water adjustment as well.... Maybe too much water.

The ski feels not strong.... Very strange.

Today I dont have too much time to play with this so any input is welcome.

Thanks

Gera



My coolings are like this:
- dual cooling from pump to manifold.
- 2 lines from head to out of the ski.
- 1 line from head to headpipe bottom.

 

[geraban19]

Forgot to say that I have a valve in line from headpipe top fitting to stinger. (from straigth T leg)

 

[Proformance1]

Take a look at my build thread I have sketches on there. Its not perfect yet, but for your area it may be good enough. The water here in in the low 50, so its still to cold for my liking. Cap the center two fittings off on the head. Take one off the head to bottom of fp, other top fitting overboard, top of FP to t branch to stinger then overboard. If its still to cold look at my sketch.

 

[Pablo]

Dont know if u want to try some different carb specs, but lemme know if u want my jetting specs. I'm running the same engine with Sbn 46's on a boyesen intake/bpipe/TL.

 

[geraban19]

Dont know if u want to try some different carb specs, but lemme know if u want my jetting specs. I'm running the same engine with Sbn 46's on a boyesen intake/bpipe/TL.

Thanks for this but I think that the TL will make our setup too diferent.

The engine starts easily and dont show signals of huge carb problems but something is wrong for sure.

The exh outlet is dark and too wet.

My first change will be on the water colling T. The long T leg is going out and I know that this is suppose to go to the stinger.

To be honest, all powerband is weak...like a 130psi 701.

I was never luck with Dasa std stroke setup.

Thanks again.

Gera

 

[wsuwrhr]

I asked Kyle if he was helping you with your setup and he said you have already emailed him.

He will be able to help you with your setup.

Brian

 

[Aircraftsalz]

It's the complete package that makes these Dasa motors hit. You cant just drop some carbs, etc, etc in there and it works..

What prop? what pump setup "Bore, nozzle size, etc" The Dasa motors like a little smaller prop than some other setups, not meaning the dasa makes less power it just helps the motor to come on the pipe faster

Compression seems a little low at 175, 190-200 helps wake the motor up...

 

[geraban19]

I asked Kyle if he was helping you with your setup and he said you have already emailed him.

He will be able to help you with your setup.

Brian

Thanks Brian.

Yes. I did email him.
Im sure there's nothing wrong with my cylinder and other components... we alll know that small things can make a huge diference like NIGHT and DAY.

I will wait for Kyle.

Gera

 

[geraban19]

It's the complete package that makes these Dasa motors hit. You cant just drop some carbs, etc, etc in there and it works..

What prop? what pump setup "Bore, nozzle size, etc" The Dasa motors like a little smaller prop than some other setups, not meaning the dasa makes less power it just helps the motor to come on the pipe faster

Compression seems a little low at 175, 190-200 helps wake the motor up...

Oh yes. You are 100% right.
Im not a newbie guy... I had several big engines a couple years ago but "I got old"... eheheheh
I cant really remember the prop that I got... Im sure it is a big hub Skat... cant remeber the pitch right now.

About compression... I know it should be something around 190psi to get a better low end.

The whole pump is completely OEM. No bore at all.

What I meant is that the PV cylinder are more intended to big motors.... strokers and TL powered .... it is IMHO. That's what I figured out during these last years.

I got from Lenzi 10 years ago a casted cylinder not PV and that was a turn key power component.

After that I got a PV (STD STROKE) and I did see no diference (same setup).

Later I got a whole new 8mm, PV, TL, FULL SPEC 49..... that was amazing.

Im asking U guys an orientation to get a fun recreational ski.... I know it is not an ultimate freestyle setup... it is almoust an OLD SCHOOL setup.

Thanks for the help.

Gera

 

[Matt_E]

It's the complete package that makes these Dasa motors hit. You cant just drop some carbs, etc, etc in there and it works..

What prop? what pump setup "Bore, nozzle size, etc" The Dasa motors like a little smaller prop than some other setups, not meaning the dasa makes less power it just helps the motor to come on the pipe faster

Compression seems a little low at 175, 190-200 helps wake the motor up...

Doesn't all of this essentially mean that those DASA motors have less bottom end power than other setups? :dunno:

(And their powerband is higher)

 

[raytherace]

Doesn't all of this essentially mean that those DASA motors have less bottom end power than other setups? :dunno:

(And their powerband is higher)

Art told me that PV engine hit at higher rpm, same for the PFP. its maybe why they need a litler smaller prop to have that bottom end back where we want it??

 

[Fro Diesel]

Sounds like the carbs are not dialed in... need much smaller pilot jets and I would increase the popoff pressure. Main jets may be too big. Things like prop, alignment, and carbs make the motor a complete package. Good to see you back in it..dont let this little crap get you down. You will love this motor once you get it right.

Sent from Fro Diesel using Tapatalk.

 

[Matt_E]

Art told me that PV engine hit at higher rpm, same for the PFP. its maybe why they need a litler smaller prop to have that bottom end back where we want it??

Why though? The PV's should allow for low enough timing to give plenty of bottom end.

 

[Aircraftsalz]

The Dasa motors are ported different than say XS... We learned a lot when switching from XS to Dasa... Also learned its not who pulls the bigger prop, its how the prop pulls ...

I will say if its over prop it will never come alive.. Its a fine line I was playing with the 1100 with props One pitch either way on the low number would spin or not rev fast enough to get on the pipe, now on the top it had the power to pull 2 sizes bigger than I was running. That also has to do with the dry pipe & other mods we cant talk about.

 

[raytherace]

from his word:

" In my honest opinion this set up is more reliable and easier to maintain than the power valve cylinders and with a better powerband." compare with ADA 5mil

"The powerfactor pipe is more of a higher rpm pipe"

"the power factor pipe is a higher rpm pipe and tends to make the midrange a little pipy feeling or putting it another way it has more of a light switch effect and has a more sudden rush of power where the b pipe comes on earlier and the midrange is very controllable"

my mistake he was talking about the pipe not PV engine directly, sorry

 

[wsuwrhr]

The smaller bore smaller stroke engines benefit more from a pv than a bigger bore bigger stroke engine.

 

[kevbo]

He's just over propped. That powervalve cylinder needs to hit 7300 to make good thrust.

 

[geraban19]

He's just over propped. That powervalve cylinder needs to hit 7300 to make good thrust.

I will look which prop I have and let U know.

Thanks

 

[waterfreak]

my stock stroke dasa pv motor made awesome power everywhere!!. I ran a 11/17 hooker with stock pump and recently the new owner put the same prop with a 144 mag and was extremely happy! the nozzle was bored out to 86mm

hope this helps a bit.

 

[geraban19]

my stock stroke dasa pv motor made awesome power everywhere!!. I ran a 11/17 hooker with stock pump and recently the new owner put the same prop with a 144 mag and was extremely happy! the nozzle was bored out to 86mm

hope this helps a bit.

Hello Steve.
I know DASA std stroke makes good power....as I sais, I have tunning problems.

I got my impeller specs. IT IS A C75 12/17 SWIRL SETBACK. Even if is too big for me thats not what Im concerning about.

Thanks guys.

I will play with the jetting that Kyle and D-roc got me.

Gera