What do these pitch numbers really mean?

[TuningForkMarine]

Hello, I would like to chime in ....... I just completed the install of the 4* keyway, Jim's milled 150 psi heads and got a Pet 2100x tach (Thanks WFO). My hole shot is the best it's ever been & the pull-away on mid range is eye watering .... how ever, my top end still wont crack 70 mph on my GPS. I have been playing with the JFK fuel tuning and just cant seem to get it diled in just right yet ... max RPM is only 7040. Everyone tells me my RPMs are still low and should be over 7200 + This is where I am stumped, any help to get the that elusive 180 RPMs & and crack that 70 mark. HELP

what kind of a prop do you have? intake grate? ride plate? those 3 things make very big difference in top end.

[OzarkYamMonster]

Hello, like in my Avitar @ bottom ... I stated a SS800 Intake grate, Solas 14/20prop, and R&D Ride plate .... any ideas how to squeeze out the max RPM's ?

[TuningForkMarine]

do a compression test. make sure your piston rings are good. if u have had Jim do your cylinder head you should be around 150psi and at 7200 RPM.

[04gtxsc]

Come down here and you can try a 14/22 and a 14/24. Also have a spare riva controller you can try.

[RaiderMagic]

what do you guys recommend for a 03 XLT 1200.
it has D-plate, flame arrestors, fuel accel. delete.
I plan to put on a Pump seal kit, R&D intake grate on & probably use the stock ride plate. Not sure about the Hole Shot kit (horror stories of sinking, melted plastics, & little effect on the XLT's...?)
I ride in the bay/ocean. it's rarely flat. Right now it spins like crazy down low & dream-meter see's 59/60mph
compression is good, very low hr ski.

I see that the solas 13/19 or 12/18 are pretty popular.

[OzarkYamMonster]

Hey 04gtxsc, Hi John .. thanks for shout. I put my ski away this past week end. My question would be by going to a larger trailing edge ... like 14/22 or 14/24 would I not loose even more hole shot ... to gain Top end ?

[04gtxsc]

Like i said I have a complete pump with a 14/24 in it and you can try it when you are ready to go. To be honest I did not notice a lack of holeshot with either prop. The one in it right now is a 14/22.

Gettng ready to put them away for the winter. On to hunting and riding quads.

[Danny Parker]

07 gti at 2500 altitude no engine mods. which prop???