Can I spin a 30P prop???
 

Boat: '02 PowerQuest 34 w/ twin 496HO's

Prop(s):
std Bravo1 28P will get 4900 to 4950 RPM
Labbed (by York) will get 5100 to 5200 RPM occasionally hits rev limiter.

I was thinking I could get a set of labbed 30P props and increase cruise and maybe gain a little on top end.
Do you think I can acheive this, or will the 30P be tto much????

Thanks in advance?


BTW: Need a set of York labbed 28P props in greaat condition?? I have a set for sale or trade.

I would think that you're there. Your numbers look great, what more could you ask for? Maybe add CMI, air filter, computer retune and then the 30" would do.

BillR,
Sounds like you are ready for 30p. I changed the flame arresters to K&N and the exhaust to Gil Big Guns on my 33AVS Scarab. Started hitting the rev limiter so went to 30p stock Bravos. 72mph to 80mph.

Stock 30 will be too much, Possible if you go wth lab 30. You will never know until you try. It's only money.

BillR,
What was your speed at 3000 or 3500 rpm with standard 28 then after labbing.
Also, what was top speed before and after labbing.

Rick

You could probably send them back to York and have them change the pitch to 28.5's or 29's.

BILLR, i dont think your ready for no friggin 30's yet. big big dif between a 28 and 30 b1.

rv, let me answer your question and ask one back. I have exact same setup as Bill. Yes we bought the same boats, dealer's offer was just too good post 9/11. Anyway, I just got my props labbed at York. Before labbing I was runnin 50 at 3500, 60 at 4000, and 76-77 at 4900. After labbing I am runnin 45 at 3500, 55 at 4000 and 77-78 at 5150.

I told John how unhappy I was with the loss of cruise speed. He says its normal, he built me a great set, and I should live with it. Basically, I must pay more for some tweaking if I feel the need.

I ran Bill's props and only saw 2 mph reduction at cruise. I could live with that. Is it normal to loose 5 mph off cruise speed with labbing?

wms,
I am no expert on labbed props but from listening to some people that have had labbing done and talking with some lab shops it seems like mid range cruise speed suffers. Yours seems to be another case in point.

It seems these shops thin the heck out of the blades and do other tweeks to get that top end increase that everyone asks for. They don't seem to mention anything about mid range cruise effects though do they. And I don't think alot of people taking the prop to be labbed think about this or care. It is top speed that seems to be discussed. I am not sure but from what I have heard it seems like it must be difficult to get both, WOT increase AND mid range cruise incease (or hold your own). Maybe some real prop experts can respond to this with some facts!

Rick

p.s. that sucks York has that kind of customer support. I always thought that at least 1 or 2 tweaks were part of the labbing. It is difficult to know exactly each persons boat/setup/handling to get it right the 1st time. I am sure it happens but seems like tweaks are required and should be covered.

Exactly!! I went with York because all of the good things I have heard about them. Why John chose to be the hard ass with me is beyond me? :(

I was aware that my mid range would suffer with labbing, but was not prepared for 5 mph. And my top end was not markedly improved either. Anybody else seen this much loss of speed (at cruise) after labbing?