How fast should I be going?
06-28-2006 | 04:35 PM
#21
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From: Amherst Ohio
Re: How fast should I be going?
Originally Posted by 1BIGJIM
So what jets did you end up going with? THe last set of pictures looked good.
06-28-2006 | 04:38 PM
#22
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From: Amherst Ohio
Re: How fast should I be going?
Originally Posted by PatriYacht
I used to have a 30' Scarab with 420's and TRS drives. It weighed 6800 dry according to the factory. It went 70 with 23 pitch 3 blade cleavers. This size boat always seemed to run well with 3 blade props. With almost 100 hp more a side you should be able to spin 25 pitch Mirages. 
06-28-2006 | 04:39 PM
#23
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Re: How fast should I be going?
Originally Posted by Holy Smokes
Any interest in trying a set of 23P Mirage's? It's what I'm running now and would love to swap and try your 22P Bravo's.
06-28-2006 | 06:26 PM
#24
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Re: How fast should I be going?
You might be hitting the wall with your ignition system. try something in at least one of the engines to see a difference. I have a friend w/ a 1988 sutphen 31 w/ 502 magnums, 410 HP (repowered w/ 502mpi). boat does 78 mph on gps. running 26" hydromotive Q4 labbed. 5100 rpm aprox.
06-28-2006 | 08:14 PM
#25
MarineKinetics
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From: Rochester, NY
Re: How fast should I be going?
Leathl WS6,
It is difficult to tell from the lighting in the photos. It does appear you are a bit cold on heat range and the jetting is inconsistent from cylinder to cylinder. Some of the plugs do not appear to have a full turn of color. Can't see the base of the insulator from the photos.
Perhaps this will help
Bob
It is difficult to tell from the lighting in the photos. It does appear you are a bit cold on heat range and the jetting is inconsistent from cylinder to cylinder. Some of the plugs do not appear to have a full turn of color. Can't see the base of the insulator from the photos.
Perhaps this will help
Bob
06-28-2006 | 09:52 PM
#27
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From: Amherst Ohio
Re: How fast should I be going?
Originally Posted by rmbuilder
Leathl WS6,
It is difficult to tell from the lighting in the photos. It does appear you are a bit cold on heat range and the jetting is inconsistent from cylinder to cylinder. Some of the plugs do not appear to have a full turn of color. Can't see the base of the insulator from the photos.
Perhaps this will help
Bob
It is difficult to tell from the lighting in the photos. It does appear you are a bit cold on heat range and the jetting is inconsistent from cylinder to cylinder. Some of the plugs do not appear to have a full turn of color. Can't see the base of the insulator from the photos.
Perhaps this will help
Bob
The heat range are you thinkin I should be runnin a hotter plug? Or I should add timing? Won't adding timing will move the mark you are pointing out. Most of the plugs have a reading like your picture for the heat range That one is the worst one. The others are a lot closer to middle of the electrode.
I did notice the jetting is inconsistent what causes that? If I run all 4 jets the same I'm too rich down low or lean up top.
Another thing too those plugs are from 2 and 7 on each motor so those are the leanest plugs I have. Running the Air Gap intakes those cylinders have longer runners.
Thanks Rob
Last edited by Leathl_WS6; 06-28-2006 at 10:00 PM.
06-28-2006 | 09:58 PM
#28
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From: Amherst Ohio
Re: How fast should I be going?
Originally Posted by JIMG
You might be hitting the wall with your ignition system. try something in at least one of the engines to see a difference. I have a friend w/ a 1988 sutphen 31 w/ 502 magnums, 410 HP (repowered w/ 502mpi). boat does 78 mph on gps. running 26" hydromotive Q4 labbed. 5100 rpm aprox.
I would be very happy with those speeds and feel I should easily be able to run that.
Thanks Rob
06-29-2006 | 06:41 PM
#29
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From: Amherst Ohio
Re: How fast should I be going?
I double checked the timing tonight and it was higher than I had thought I'm not sure if the light i used last time was bad or what but timing aswas 36 on one motor and 37 to 38 on the other...
Yikes.
I'm going to try and get back in the water tomorrow.
Yikes.
I'm going to try and get back in the water tomorrow.
