900cc vs 1100cc +

[masterblaster]

There have been some really impressive results coming from 900 cc motors recently,what would most prefer?a 900 with 10 mill or smaller crank? Many diff opinions on this, case strength,square cc to stroke,piston weight,rev speed,flow room for transfers.life of bearings,maintenance intervals,among others,IF a 900 was out there that made the bigger cc power,but was not 1/3 more $ would a 1100 or 1200 be desirable to very many?

 

[stefan]

SUB

 

[Christian_83]

i Think, the one People Can afford. I would like to get a 900cc, but the xs900rr is out Of my pricerange, the TPE 900 4mm is allso pretty steep for me because expensive shipping and import taxes.
But what i would like know, would it be impossible to make a TPE 85mm 10mm stroke, to a Price like the TPE 1105. ( a 7500 shortblock is allmost 10k with shipping and 25% import tax in dk)
At the moment the Best option for me would be to buy a xs900r 10mm topend kit and build it

 

[j0hnny]

i much prefer the 2 ski's i have ridden with strokers and small bore. to be fair the xs1000 i rode i had no business riding. but my next investment will be a php engine with their recommended setup. tons of power. super smooth throttle application and a company with great support.

 

[Dartman]

sm bore 10mm stroke is the best way to achieve big transfers and the 900cc's with the 62t platform

 

[truerider411]

I have a 10mm 900 7 port dasa in my dvx and a 1100 10mm dasa in my kdx. Both running TL, race gas, PFP, 155 pumps. Only difference in the 2 setups is the dvx is running lightweight flywheel, crank, and 48mm dasa carbs, KDX is running 49 full specs.
At first I never noticed a difference but now after getting used to my 900 the 1100 definitely is a little scarier.

 

[Quinc]

What about the 860 and 880?
http://www.x-h2o.com/index.php?threads/new-tnt-race-motors.155801/#post-1682270

 

[hink320]

I've rode both of @truerider411's skis back to back also. Ride the 900 first and it feels like it's all the power anyone could need, then get on the 1100 and it puts an even bigger smile on your face. Get back on the 900 after riding the 1100 and it almost feels like a turd, until you realize you're still doing effortless, big flips and spins. Then I get on my 1200 and it puts an even bigger smile on my face. I personally like the big power, but it's probably because it's easier to compensate for my lack of skill.

 

[Waveblaster785]

I keep seeing people reference small pistons. What do you consider small pistons?


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[Christian_83]

I think small bore/pistons are 85mm, because the old DASA were small bore 85mm and the newer ones are big bore, 89 and bigger

 

[AtomicPunk]

I have a 10mm 900 7 port dasa in my dvx and a 1100 10mm dasa in my kdx. Both running TL, race gas, PFP, 155 pumps. Only difference in the 2 setups is the dvx is running lightweight flywheel, crank, and 48mm dasa carbs, KDX is running 49 full specs.
At first I never noticed a difference but now after getting used to my 900 the 1100 definitely is a little scarier.

First World Problems... LOL

 

[wanderer1]

I have a 10mm 900 7 port dasa in my dvx and a 1100 10mm dasa in my kdx. Both running TL, race gas, PFP, 155 pumps. Only difference in the 2 setups is the dvx is running lightweight flywheel, crank, and 48mm dasa carbs, KDX is running 49 full specs.
At first I never noticed a difference but now after getting used to my 900 the 1100 definitely is a little scarier.
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For a non competitor, where cc is not an issue as far a class placement, rec rider that is looking for the most power/fun for the buck where are you at with these 2 engines? I assume the 7 port 900 is actually more money than the "old" 10mm 1100. So if you could have one would you just go with the 1100 assuming its the same or less money and has more power? Another thing to consider is bores, the 1100 as delivered has 1 or 2 overbores? How many can you get from the sleeves in the 7 port 900? I think this follows along with what the op is asking, since you have 2 examples that compare well and I believe were built/tuned by the same guy so many variables are removed you are probably in the best position to answer. I know it would help me make a choice.

 

[truerider411]

For a non competitor, where cc is not an issue as far a class placement, rec rider that is looking for the most power/fun for the buck where are you at with these 2 engines? I assume the 7 port 900 is actually more money than the "old" 10mm 1100. So if you could have one would you just go with the 1100 assuming its the same or less money and has more power? Another thing to consider is bores, the 1100 as delivered has 1 or 2 overbores? How many can you get from the sleeves in the 7 port 900? I think this follows along with what the op is asking, since you have 2 that compare well I believe you are in a good position to answer.

After getting used to the 900 I no longer need the 1100. Im not going pro. I just want to compete with a fair motor now. If you want crazy power and amazing bang for your buck the 1100 is the way to go. I had the 900 built just for competing.

 

[hink320]

For a non competitor, where cc is not an issue as far a class placement, rec rider that is looking for the most power/fun for the buck where are you at with these 2 engines? I assume the 7 port 900 is actually more money than the "old" 10mm 1100. So if you could have one would you just go with the 1100 assuming its the same or less money and has more power? Another thing to consider is bores, the 1100 as delivered has 1 or 2 overbores? How many can you get from the sleeves in the 7 port 900? I think this follows along with what the op is asking, since you have 2 examples that compare well and I believe were built/tuned by the same guy so many variables are removed you are probably in the best position to answer. I know it would help me make a choice.

Valid points about over bore options, the Dasa 1100 only has 1 bore over the beginning bore of 94mm. For others interested in a 10mm 1100cc motor, the ET1100 should be considered. It makes very impressive power, has 2 over bores at 94.5 and 95mm and is being sold at a very budget friendly introductory price right now.

 

[sneds]

I could be wrong but, I'm pretty sure the Dasa 1100 has more than one bore left. I believe they go in 0.5mm increments also.

Great thread. I always wondered how these two motors stack up to one another. Thanks truerider411 for the comparison.

 

[hink320]

I could be wrong but, I'm pretty sure the Dasa 1100 has more than one bore left. I believe they go in 0.5mm increments also.

Great thread. I always wondered how these two motors stack up to one another. Thanks truerider411 for the comparison.

Sorry, but you are wrong. My 1200 has the same bore and piston size as the 1100 and I can also only do one over bore, from 94 to 95mm.

 

[TheBuzzard]

if you arent competing and doing only flat water, i see no reason why anybody would choose less power if they have a choice/can afford it. if you chase boat wakes/surf,i say 1000cc power is too much.

 

[masterblaster]

I dont believe in such a thing as too much power,its very easy to bring power levels down with a few water changes for surf and chasing boats,then when you want max power for flat water fun,quick change back.
truerider,whats your impression on the throttle response and low end power of those 2 setups, They are made very sim in terms of flow though right? Throw a few more things in hypothetical comparison,85 mill pistons,nikisil bore,larger transfers,and aux exh ports. IF the price were really significantly lower than a 1100 or even bigger motor needing billet cases and was capable of throwing big flat water tricks and perform well in surf, would larger cc be necessary ?

hink.. the ET is a nice option right now,the dyno time put in to get those ports right is impressive,as well as the other parts tested and changes to the power curve documented,is a real plus,less hype more facts means alot if you ask me.

 

[TheBuzzard]

I dont believe in such a thing as too much power,its very easy to bring power levels down with a few water changes for surf and chasing boats,then when you want max power for flat water fun,quick change back.
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so you think i should bog down my freak with its dasa 1000, TL, PFP, novi 48s,race/AV gas boat, so it can be used for surf or so it wont have way too much power to hit big boat wakes without shooting to the moon and falling out of the sky like a stone and landing like a ton of bricks? thats not realistic for anybody. now if you have a 1000 with stock ignition, bpipe, 44 carbs, regular gas running POS, that may not have too much power for boats or surf, but it wont have enough for quality flat water fun either. i dont want to chase boats and wear out a big dollar motor by doing that.

 

[masterblaster]

actually yes its much more realistic to have a motor that will do both well in a dual purpose ski, Its far more expensive to have 2 high dollar skis purpose built,and way less fun and less capable to have one beater you dont enjoy to ride as much. But if you like to wave money around on 2 big money purpose built skis your not really the audience of mass market