XR2 Jets

[Silversurfer]

Hi all,

Just got my engine back with running in jets 0.74" appartently have to use these for the first 7 hours. My question is what size jets should i use after that to get the most speed out of my engine?

Also have a Susuki V4 two stroke 100HP engine and want a new prop for it which pitch should I be looking for think it revs to 5,600 @ the moment?


Stewart

 

[Captain Chaos]

whats that suzi on?

 

[Silversurfer]

Phantom 16

 

[Captain Chaos]

just realised, its the one in the vid.

cool boat :tu

 

[Matt]

What jets did it have in b4 the blowup?

 

[darexms]

What sort of top end did you get out of your P16?

 

[Silversurfer]

Dont know what it had before?

 

[Silversurfer]

What sort of top end did you get out of your P16?

Brother reckons 52-53 mph! Full trim very flat day, following wind and tide etc

 

[Silversurfer]

Tried the prop calcs but dont know the gearbox ratio

 

[Silversurfer]

What sort of top end did you get out of your P16?

What do you get out of the ring 16? We used to have a 90 Yam on the phantom 16 42-43mph then changed the Prop for a Ballasitic and got 48mph out of it raised the engine as well. But Couldnt water ski behind it anymore at that height.

 

[BREN]

i had a ring 16 with a mariner 75hp did about 45mph

 

[Jon Fuller]

We used to have a 90 Yam on the phantom 16 42-43mph

That seems slow! A race P16/90 Yam should do more like 55mph I would have thought.

Ciao would have a more accurate idea of it....over to you John.

 

[Silversurfer]

Oh well - Thats on boat speedos and all the rest of the boll*cks about whos goes the fastest. The fact was not much beat it in Salcombes Estuary and thats whats mattered @ the time!

Anyways back to the orginal question Jets and Props please!!

 

[darexms]

What do you get out of the ring 16? We used to have a 90 Yam on the phantom 16 42-43mph then changed the Prop for a Ballasitic and got 48mph out of it raised the engine as well. But Couldnt water ski behind it anymore at that height.

Dunno what speed, it's not finished yet. I was hoping to see 45, maybe 50mph which to be honest is more than enough for what I want it for. The problem is, I've still got that little voice telling me to change the order to a 175 before it's too late. I don't know how true it is, but I've been told they do 75mph+ with one of those.

 

[darexms]

What prop is on the Suzi at the moment?

 

[Silversurfer]

What ever they come with new. Wouldnt put a 175 on a ring 16 though mate. No more than a 115. 90HP will be fun.

 

[BluFin]

What jets did it have in b4 the blowup?

Matt theres a job for you in the diplomatic service, I couldn't put it as suttle as that.

Well done

 

[Silversurfer]

Matt theres a job for you in the diplomatic service, I couldn't put it as suttle as that.

Well done

They where obviously not big enough as it ran lean !

 

[Taz]

Just take the jets out!

 

[Burty]

Just take the jets out!

Why?