Surfriding 950DASA 8mil stroke vs ET967 SS?

eastcoastjumper

James
Site Supporter
Location
Long Island
How do you "blow the water out?"

What product do you guys recommend for fogging oil?

@eastcoastjumper how much to do you weigh?

@dmpus how much do you weigh?

These additional questions are relevant to dmpus' overall inquiry:

What is the best size most reliable engine for a surf ski (likely a Rickter Edge) at say for example my body weight of 205 lbs...?

Should we be including the Kavinci 997 in these discussions yet?

Is 62T crankcase stronger more reliable than DASA crankcase or vice versa?
Rev the ski properly when you take it out of water after riding. Do the same thing when you get home. Rev it out the next day to blow out the last of the sitting water, then fog is usually the way i will store it for longer than a week or 2.

I use stabil fogging oil

I weigh 190-195lbs

@dmpus is probably 20-30+ lbs lighter than me

For your engine inquiry, it all depends on your wants, needs, and ability. None of them are reliable if you sink your ski, improperly store it, or dont maintain/check it over internally/externally.

Do you want a dasa 1000, probably. Can you barely do a flip, probably.

The dasa motors use stock, but modified 62t cases. Aside from their own billet cases, but theyre not standard on most dasa engines.

The kv997 is not sold separately. Different mounting plates and can only be run in a rtr krash hull or custom configuration.

Sent from my SM-G950U using Tapatalk
 

DAG

Yes, my balls tickled from that landing
Location
Charlotte, NC
For your engine inquiry, it all depends on your wants, needs, and ability. None of them are reliable if you sink your ski, improperly store it, or dont maintain/check it over internally/externally.
ding, ding, ding, we have a winner

...or he can machine for stock stroke and use billet cases :eek:
 

McDog

Other Administrator
Staff member
Location
South Florida
I will say this: the only bad things I have heard about the et engines is that he pissed off all the other engine manufacturers because they claim he copied others designs and he sells them too cheap which also hurt their market. I have no claims of knowledge about it other than what I read here. I have heard nothing but good things about the performance.
 
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Im running et967 with dual 46 b pipe 148 pump. we have 2 dasa 950 skis in our group and i still think the et is my pick. now the 900rr dasa with a lay down pipe definitely feels to be making more power. I have a full season on the et967 and it is running strong. I would definitely argree that the b pipe is a limiting factor on these engines, but they are all making plenty of power for most surf riders.
 

McDog

Other Administrator
Staff member
Location
South Florida
I dont know why people say they copied TPE. TPE is cast and allows for better port flow from the rounded sections on the sides of the cylinder. ET seems more like a copy of DASA/PHP/ADA because its billet.
 

DAG

Yes, my balls tickled from that landing
Location
Charlotte, NC
I dont know why people say they copied TPE. TPE is cast and allows for better port flow from the rounded sections on the sides of the cylinder. ET seems more like a copy of DASA/PHP/ADA because its billet.

Everything Art could be copied was, Eriks motors still run better because of the few things that couldn't be made on a CNC as you mentioned.


...now we are really off topic
 

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Well, I chime in on this one. Art called me first, I didn't know who he was. He told me about his exhaust manifold project (he was so concered it would be copied and now I now why his concern,-------------------- its what he does) ----and then that he is making a cylinder for his son "just five of them" (I was stupid and answered questions" then lead into " how does your cylinder design work?" He called me often for about two months (take me to court and we'll get phone records) asking how jetski engines work. Yes he has an understanding of two strokes but not jetski's. While he was doing his dyno runs he finally asked " what are your port timings?" he was so far off, probly because he was using a porting program because he doesn't know jetski's. He then called me back a few days later to tell me how much better his engine ran. YES, all he does is copy others work and effort. He did the same thing to Zack at PHP, at least Kyle at DASA told him to go buy a cylinder and get it from there. Art, got his 967 and 1107 from me when he shook my hand, looked me in the eye and said " its ok, you can show me I'm not getting into this business" (I have a witness)
LYING sack of SH*****T. Apparently he did the same thing in the snowmobile world but at least those guys drag race and a weak engine is soon discovered. He couldn't even keep his hp numbers straight when he was telling me what his stuff was doing. (I remember hp and duration numbers really well for some strange reason)

He has copied Dasa, PHP, FS (or tried) ( you sure you want to buy carbs from a guy who a couple of months ago was calling Ed to ask how carbs work), XS and me. Non of his designs are his, he doesn't know enough about what makes a good jetski engine. He does the con-man thing to where he talks to you as a peer and enthusiast and explains his theory on how things work then waits for you to give him your insight, and whala, it shows up in his next product. The good news is he only make a cheap copy that doesn't make it to the top tier. Go ahead and call him for specific setup on an engine, hull, pipe, carb, exhaust. You'll get a blow-off answer. He won't make anything at the best level until someone else builds it first.
I don't give a crap if you don't like my post, its all true, call Zack at PHP, don't bother Kyle, he's too busy but you'll get the same.
His 967 made 144 hp at 7800 rpm, joke! A good 785 superstock back in the day was at 142 - 145hp.
A 967 can't pull what a 964 Dasa will pull, in fact the 964 will pull just about what an 1107 pulls. You get what you pay for. I understand this stuff isn't cheap but pay cheap and you get cheap.
So if you have a specific budget, I get it, but don't confuse. Its like driving a car set up for true track use and some guy puts on wings and big tires then tells you he's a racer too, sure buddy, LOL.
There are a few guys on this forum and fb who post their opinions as if its fact. Where will they be at WF? Most likely not on the beach with the pro's, so why do you listen to them?
I can tell you that some pro's will be looking for Phil Clemmons, Paul Lehr.
Art you can come on here and deny all I've said but you are what you are. I may sound bitter but I don't care about that anymore, but what I've stated is what I've experienced and know. Oh and here's a quote I'll never forget from Art, "I love screwing up markets to prove I can, its kind of a hobby of mine" This is the guy you want to support.
There are a few really knowledgeable people on this forum but they are drown out by the bs noise.
 

E350

Site Supporter
Location
Sacramento Delta
IMHO, this is the most “on topic” thread on engine design and commercial availability regarding engine reliability vs power that I have ever read on any forum. 1 Thank you.

Can I ask about the elephant in the room? Since any variation from the optimum stroke ratio (i.e., "stock" stroke) may increase performance by increasing cylinder volume but will always reduce reliability (at least somewhat) -- and reliability is what @dmpus is (and I am) concerned about -- isn't increased stroke and/or increased cylinder bore really just a “work around” for the current crop of weak "pump gas" fuels – which work around ultimately creates a reduction in reliability?

Since I started jet skiing three years ago, I have been running premium and 110 leaded race gas at ratios 50/50, 2/3 to 1/3 at 50:1 Walmart Super Tech oil and now to 3/4 to 1/4 and Klotz oil at 40:1 in our 185 lbs compression 550sx.

110 leaded race gas is available locally at $9 per gallon. So, wouldn't a stock stroke smaller displacement engine running a higher compression which is suitable for 100% race gas (or some less premium/110 ratio) actually create a lighter, more reliable and more-powerful-across-the-entire-rpm-band engine than a stroked (or maybe even a bigger bore) engine?



1. https://www.fordmuscle.com/archives/2003/09/stroker/

2. BTW, (likely because of political correctness) I have never come across a scientific study comparing the biological effects of the current chemical additives put into gasoline as a substitute for lead compared to just using lead. And nothing at all regarding 2-cycle engines. Spectators would be banned from the stands at auto races if leaded race gas is that bad right? It is IMHO, like the current studies on the detrimental use of firearms each year which entirely omit to include and to compare data on the beneficial use (self-protection from presentation or use) of firearms each year. In this latter regard, check this out:

frontsight.com/larry
 
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Quinc

Buy a Superjet
Location
California
IMHO, this is the most “on topic” thread on engine design and commercial availability regarding engine reliability vs power that I have ever read on any forum. 1 Thank you.

Can I ask about the elephant in the room? Since any variation from the optimum stroke ratio (i.e., "stock" stroke) may increase performance by increasing cylinder volume but will always reduce reliability (at least somewhat) -- and reliability is what @dmpus is (and I am) concerned about -- isn't increased stroke and/or increased cylinder bore really just a “work around” for the current crop of weak "pump gas" fuels – which work around ultimately creates a reduction in reliability?

Since I started jet skiing three years ago, I have been running premium and 110 leaded race gas at ratios 50/50, 2/3 to 1/3 at 50:1 Walmart Super Tech oil and now to 3/4 to 1/4 and Klotz oil at 40:1 in our 185 lbs compression 550sx.

110 leaded race gas is available locally at $9 per gallon. So, wouldn't a stock stroke smaller displacement engine running a higher compression which is suitable for 100% race gas (or some less premium/110 ratio) actually create a lighter, more reliable and more-powerful-across-the-entire-rpm-band engine than a stroked (or maybe even a bigger bore) engine?

frontsight.com/larry


Unless your engine has some radical porting and needs the extra octane; you are wasting your money and most likely losing performance running race gas in your 550. Either bump up your compression or stick with 92 pump gas.

There are some good articles out there on how race fuel works and when/why it is needed etc.
 

E350

Site Supporter
Location
Sacramento Delta
The main question in my post was assuming that 110 leaded race gas is readily available at an acceptable price, why not build a stock stroke high compression engine for a surf ski?

[Quinc: Thanks. As to the 550sx, it has 185 lbs compression even per each cylinder (stock compression is supposedly 150 lbs.) which, from my reading, I understood that 185 lbs. was right at the edge of needing additional octane to prevent pre-ignition and thus to prolong engine life -- but remember I really don't know what I am talking about. Before I bought the 550sx I seized the rear piston in my wife's 1988 440 Super Stock, so I was afraid of doing that on the 550sx. I think it sounds better -- less ragged -- with more octane. But I have reduced the mix to add less and less race gas to reduce the amount of octane because, in my personal experience, more octane reduces rpm at WOT (and apparently adding more oil to gas ratio -- I am now at 40:1 -- also reduces rpm at WOT). So I am probably a nervous ninny using some additional octane mixed into the 550sx. But I think it sounds better to my inexperienced and untrained ear.]

mikidymac and eastcoastjumper Yup, "pristine" as in we have a pretty big homeless population living near the confluence of the Sacramento River and the lower American River. So, when we heard on NPR that there was Hepatitis A in the river(s) in San Diego County from their homeless druggy population, my wife and I got the Hepatitis A vaccination since she water skis at least twice a week in the river and jet skis with me at least another 3 times a week.
 
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