Best Prop for...

The propeller on your boat has a big impact on the performance of your boat. This is the place to discuss this subject.

Postby Johnny HotFoot » Thu Aug 09, 2012 5:25 pm

after a few good runs with the alum 3 blade 14.25 x 23P I can report my hole shot suffered alot... not too bad for cruising around but if I were to pull a skier or tuber I'd have to get back to a 21P

she cruised at 25mph at 3000 rpm
35mph at about 3800 RPM
45 mph at about 4800 rpm
WOT was 5200, maybe 5400 rpm and pushed us along at 53mph

I think my SS 3 blade 21P performed better in the hole shot AS WELL AS top end? hole shot off course, but the top end seemed 55-ish?

It is possible to go faster with less pitch if the motor spins the lowet pitched porp faster, right?

I may need a 22P after all... or I may go back to a 21P???

I was happy to get her well into the 50's, but I was told this boat did 61, and could push 63 with a different prop.... conditions weren't perfect for my runs- it was windy and wavey and she was full of gas at tmes, maybe had more trim in her... but all those negatives aren't good for another 7mph are they?


how many mph can one leave off by not trimming up enough?
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Postby Johnny HotFoot » Sun Aug 12, 2012 6:49 am

I was out last night and was able to squeeze just about every mph out of the 3 blade 23P prop: 56mph@5500rpm (WOT)

she ran great, but wouldn't turn past 5500 rpm so I'm thinking 23P is just a smidge too much pitch as I can spin a lower pitched prop faster, therefore getting a faster top speed (am I right?)
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Postby xcr-700 » Sun Aug 12, 2012 9:44 am

More likely you hit the revlimiter.

Try a good 4 blade SS prop in a similar pitch and we should notice a difference across the spectrum.

Good luck!
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Re: Best Prop for...

Postby Johnny HotFoot » Tue Sep 10, 2013 4:44 pm

Just got a new Ballistic 14 1/4" 23P gonna get her on today if possible.... this 'should' be the exact right prop to squeeze every last drop of speed out of my engine... :twisted:
1999 Interceptor 232 BR, 5.7 GS, Comp Cam
SX Drive, SS 3 Blade Ballistic 14.25 x 23P
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Re: Best Prop for...

Postby iammarcuse » Tue Sep 10, 2013 8:24 pm

I can tell your tach is way off. Red line is 4800 on that motor, and it would not spin a 23p to 5500. my guess is your dip switches on the back of tach are set wrong. make sure they are set to 8 cyl.
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Re: Best Prop for...

Postby 4Play » Tue Sep 10, 2013 8:35 pm

iammarcuse wrote:I can tell your tach is way off. Red line is 4800 on that motor, and it would not spin a 23p to 5500. my guess is your dip switches on the back of tach are set wrong. make sure they are set to 8 cyl.

I concur 100%. If you were turning a stock motor at that you would have to have bypassed the rev limiter and would need a catchers mitt to catch the parts as they flew by. Not to say that and higher revs can not be achieved and sustained by the right motor but not stock.
Agree, the tach is likely set wrong at best, or broken at worst.
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Re: Best Prop for...

Postby Johnny HotFoot » Tue Sep 10, 2013 10:26 pm

This blows! My tach has got to be off. With the ballistic 14 1/4" 3 blade SS 23p she topped out at only 50 ish??? Worse yet was I was seeing 6,000 rpm. What the hell is going on? I am sure my temp Gauge is off as it reads cooler than she runs so says my IR temp gun. How do I recal or reset my tach to 8 cyl ? If that isn't the problem I just replace the tach? Is there a cheapo tach I can hook up to verify the true revs? I thought my rev limiter had been disabled but after tonight ad reading the above posts I think I have a problem.
1999 Interceptor 232 BR, 5.7 GS, Comp Cam
SX Drive, SS 3 Blade Ballistic 14.25 x 23P
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Re: Best Prop for...

Postby iammarcuse » Wed Sep 11, 2013 9:47 am

If you just changed tach then it almost for sure set wrong. simple fix.

http://faria-instruments.com/site_manua ... meters.pdf

http://www.ebay.ca/itm/FARIA-EURO-BLACK ... 0475870450
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Re: Best Prop for...

Postby Johnny HotFoot » Wed Sep 11, 2013 12:44 pm

Not a new tach, it's the original to the boat (1999) the speedo has been changed as it's white faced instead of cream colored face like the rest ( :hammer: ) so I know the speedo took a crap at some point... the tach has always shown the revs to be to the moon and I thought it was a result of the rev limiter being eliminated.... if it's obvious the 'pots' are not where they should be I will take a look next chance... is it as simple as that? just move the tiney switch from what ever cylinder it's at to the 8? I hope that's the problem, if not he tach is crap?
1999 Interceptor 232 BR, 5.7 GS, Comp Cam
SX Drive, SS 3 Blade Ballistic 14.25 x 23P
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Re: Best Prop for...

Postby iammarcuse » Wed Sep 11, 2013 1:04 pm

Yes, it is that simple. Read the instructions I posted. Turn the arrow to #3. My guess it you are on the 2 or the arrow is facing away from the 3 instead of towards it.
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Re: Best Prop for...

Postby Johnny HotFoot » Fri Sep 13, 2013 9:15 pm

UPDATE:
My speedo is stock, it's the tach that was swapped out and replaced with a white face (all other gauges are beige :hammer: )

The pot switch WAS off... the arrow was clearly pointing to the 4,( the setting for a 10 cylinder?) so I used a flat tip screwdriver to move the arrow point to the 3, for the 8 points (V8?) setting???? sound good so far? when for a cruise and had it run up to 7 grand at 3/4 throttle and could bury the 7000 at WOT.... so now I' at a loss... could it be the arrow is backwards and the other end of the point needs to be set to 3? or is my tach just a piece of garbage that needs to be replaced asap?

Any help is greatly appreciated.. thanks

if my tach IS toast, can I trust the wires are running to the tach correctly and just plug and play with the new tach?

Lookinh for a Faria 7,000 beige tach. anyone have one sitting on a shelf? :wink:
1999 Interceptor 232 BR, 5.7 GS, Comp Cam
SX Drive, SS 3 Blade Ballistic 14.25 x 23P
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Re: Best Prop for...

Postby iammarcuse » Fri Sep 13, 2013 9:50 pm

Tach may be fine. Might just need to be set right. Every make is different. On a Faria 3 is for 8cyl. Other tachs are different. There are several settings. 2 strokes, 4 strokes, 4, 6 or 8 cyl. What make is it? You should be able to look up online the proper settings.
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Re: Best Prop for...

Postby Johnny HotFoot » Sat Sep 14, 2013 12:00 am

Its a Faria, and there was a sticker on the back that stated 8poles is set to 3, the fact that it wasn't set to the correct # has me scratching my head... who would replace a tach and then NOT set it up right? ..... also I'm reading that the 7,000 tachs are for outboards and the 6000 are for I/O, could that be the problem?


... I tried facing the arrow away from the 3 so that the other end is pointing to the 3, I started her up and she idled at 1000.... tomorrow I will be out on the water seeing if that did anything.... is there a re-set button I was supposed to hit when I reset the pot from 4 to 3?

for $60 I may have Faria play with it, IF it's the right tach for my I/O
1999 Interceptor 232 BR, 5.7 GS, Comp Cam
SX Drive, SS 3 Blade Ballistic 14.25 x 23P
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Re: Best Prop for...

Postby iammarcuse » Sat Sep 14, 2013 12:10 am

Yes, that is the problem. Someone put a outboard tach in your boat and it has you messed up. No wonder you were getting such wonky readings. http://faria-instruments.com/site_manua ... ations.pdf
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Re: Best Prop for...

Postby Johnny HotFoot » Sat Sep 14, 2013 6:31 pm

It's official..... all my prop testing is for shi t :cry:
I went to the boat today, it's a 7000 OB tach all right, even says crap about outboards on the back of the tach

Started a new thread about my tach search

in the meantime... can I run my boat at WOT? :?:

I really hate people! what kinda a-hole goes through the trouble of replacing a tach and gets the wrong one? :hammer:
1999 Interceptor 232 BR, 5.7 GS, Comp Cam
SX Drive, SS 3 Blade Ballistic 14.25 x 23P
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