300xs vs 300x vs 400R vs Caldwell Billet 2.5

[Double Rigged]

If you watch any of Kurt's videos with him running that 3.6X motor (which makes over 400) you will see that he twist it hard for miles on end. He was breaking cases before he was having them shimmed correctly I believe. Charlie runs his built X on the 21 Skater and covers more miles then pretty much anyone in a given year (his case is custom with bravo gears that have been turned down to fit but has big hours on it) and his makes 400. Hydrotec has built several, Todd D. has built several, Simons has built several, and DBR has them running but I don't know about buying them as turn key complete powerheads. If and when these get put on a large hull and really loaded all of the time, I am sure that detonation will become more apparent. Charlie runs good fuel in his all of the time, Dave has one on his 24 predator (24 skater copy that is heavy) and he runs good fuel as well.

If you are wanting one of the manufactures to step into this market and not strictly an aftermarket company or shop--never happen. This is no different then what we had to do with motorcycles (Pre-1994) before the big bores became available from the factory. Everything we ran was pretty much aftermarket other then the crank "which had to be welded" and the case which had to bored. Snowmobiles and jetskis were the same story. When they come out with a program to dump a hotter tune in these 400s and or add some cubic inches to the picture then they will make what everyone wants but its gonna be pricy and still gonna be heavy....

Joe

Joe, I hear your point and agree that there will be only aftermarket companies. Not looking for a huge company just a someone with a store front business and real test data that they can share like big boat engine builders. Simon out of the engine building business, DBR nothing concrete yet and very hard to get a hold of, Hydrotec only one with Dyno pulls to show, and another on the QT working on stuff that is not public knowledge yet.
As far as single engine boats with 300x power I am sure there are a lot of guys that can do good work. But like you said for a bigger boat who knows. Not ready to drop a ton of money on whim unless someone can show me what they have to offer on a dyno. JMO.

Chaz if you have some good stuff give me a call. Always looking for more HP.

[Chaz]

I have been working on a special induction system for the 3.0L Mercury ....

https://www.youtube.com/watch?v=V1hEQbGRJ_Q

[NICE PAIR]

I have been working on a special induction system for the 3.0L Mercury ....

https://www.youtube.com/watch?v=V1hEQbGRJ_Q

If those will fit my 300XS's ..... I'm gonna need two. ;-)

[David]

When the 4 stroke motocross bikes came out, weren't they a lot bigger displacement then comparable 2 Strokes? If the same resources were put into bigger two stokes, which would have won?

[90 5.0]

When the 4 stroke motocross bikes came out, weren't they a lot bigger displacement then comparable 2 Strokes? If the same resources were put into bigger two stokes, which would have won?

450 4 strokes competed be 250 two strokes
250 4 strokes vs 125 two strokes.

A 500 2 stroke is an amimal, they phased out the 500cc two strokes super cross class and the development just died on them. Today's technology could have produced a more usable power band 500cc two stroke bike.

They were unpredictable brute animals, yz490,cr500 just insane power that comes on all at once.

Great for Oldsmobile hill though!!

[jpf091959]

yea, big fan of two strokes. I rode 250 and 500cc motocross. I would run the 250's wide open and control it with the clutch. I would jet the 500's fat and hope I could stop and pivot before blasting through the berm. They were beasts and I miss those days.

[MeCapnDave]

400 ROS if money is no object

[davidmercury]

400 ROS if money is no object

I had considered rerigging with the 400's but expense would have been insane

[speicher lane]

Your Skater would have been an AMAZING test bed to promote the 400's as a re-rig power vs. the goto engine for the CC's which the marketing is targeted at...probably would have jump stated demand for a lot of 32's rather than the trickle of conversions that are taking place.

That is an amazingly beautiful (and unique) Skater...