less pitch 383

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KBA
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less pitch 383

Post by KBA » Wed Jun 17, 2015 8:03 pm

My new 383 with 2.38 stinger and 79" r 3 blade turning a little over 4900 rpms on water with pitch a little over 2 should I take some pitch out and get more rpms motor has howards 180245-10

SWAMPHUNTER45
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Re: less pitch 383

Post by SWAMPHUNTER45 » Wed Jun 17, 2015 8:57 pm

You gotta break it in.

Make sure the timing is set right and you are running a breakin additive.
Comp Cam159 additive works great

KBA
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Re: less pitch 383

Post by KBA » Wed Jun 17, 2015 9:07 pm

16' boat it runs dry with light load just wondering if It would do better with less pitch and more rpms with my prop and gear reduction

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Re: less pitch 383

Post by loudmouse » Wed Jun 17, 2015 10:42 pm

I would take it to 5300 and see if its better. If it is then move it again to 5500. If it keeps getting better keep going up with a max around 5800. Then set it back where you liked it best. If the boat did not respond when you go up there is no need in going any higher.
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Re: less pitch 383

Post by wallbanger » Thu Jun 18, 2015 12:23 am

my 383 with 238 stinger is turning 5300 on trailer with 80" r 3 blade set on +2 but not much over. 3000 at cruise with 16 ft freedom craft and 3 people and cooler. prop likes that rpm and so does boat.

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Re: less pitch 383

Post by barhopper » Thu Jun 18, 2015 7:23 pm

Mine runs best a 5000 WFO on the water. Also a 16' boat that goes where it's pointed. 2.3 belt drive. Motor builder thought I should twist it up higher. I tried it at 5300 then 5500. For my application the 5000 worked best.

KBA
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Re: less pitch 383

Post by KBA » Thu Jun 18, 2015 9:06 pm

Okay gonna take a little pitch out get more revs and see what happens

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LoxStroker383
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Re: less pitch 383

Post by LoxStroker383 » Fri Jun 19, 2015 8:18 am

I have a 383 with howards cam 180265-10. 3 blade NGR 80" om my 14 foot DB. I do have a heavy boat and it will run dry sometimes depending on how sticky the green grass is. I am turning 5100 on dry ground max with my blades set exactly at 2 mark. boat is running great after I broke in the motor. My timing is set at 32 and no vacuum advance. I also have a 2.38 box but its a OX. I just want to see what you do by tKING little out to get the more RPMS. I may follow you . :florida:
14x8 Diamondback, 383 Stroker, 2.38 OxBox, 80" 3 Blade NGR

KBA
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Re: less pitch 383

Post by KBA » Fri Jun 19, 2015 11:00 am

Will post results

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Re: less pitch 383

Post by Gangreen » Fri Jun 19, 2015 7:16 pm

Wallbanger mine is doing the same rpms. 3100 cruise and 5200 max. 2.38 box.

wildcard
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Re: less pitch 383

Post by wildcard » Fri Jun 19, 2015 8:29 pm

find what you're prop is maxed out at, no matter what rpm, go from their

KBA
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Re: less pitch 383

Post by KBA » Fri Jun 19, 2015 9:24 pm

Have not put back in water yet but when i first put prop on it was closer to 3 mark and I could only get 4500 rpms loaded the boat dry on concrete but it would not budge in st Augustine grass however cruise was awesome at 3200 going to see what happens tomorrow

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Re: less pitch 383

Post by wallbanger » Sat Jun 20, 2015 2:23 am

several boats here in hernando pool set up by larry at citrus transmission turning 3 blade r at 2200 rpm. boats will climb outfall canal and go anywhere you point them. very happy with setup. mas 383 503 hp at higher rpm. torque is max at 4800. never need to go much higher than 5000 rpm to get anywhere.

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Re: less pitch 383

Post by KBA » Sun Jun 21, 2015 7:49 pm

Didn't get to take any pitch out yet I live in Texas and rained all week and tried to go out but motor has been spitting and sputtering kept it covered during week and ran great before rain checked distributor for water timing etc runs from 1800 to 4900 rpm runs mostly around 2000 idles fine maybe carb issue edelbrock 750 any ideas ??

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Re: less pitch 383

Post by Plastertech2518 » Sun Jun 21, 2015 8:21 pm

I'm running a 383 stroker on 16 ft freedom craft 2.3-1 belt drive with 3 blade R. They are set just below 2nd notch and running 4900 WOT on the trailer. It will run anywhere I point it.
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SDeatherage
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Re: less pitch 383

Post by SDeatherage » Thu Jun 25, 2015 8:08 pm

KBA wrote:My new 383 with 2.38 stinger and 79" r 3 blade turning a little over 4900 rpms on water with pitch a little over 2 should I take some pitch out and get more rpms motor has howards 180245-10

That prop max rpm is around 2400 rpm. Therefor you would need to spin your motor appx 5700 with a 2.37 box to get the max rpm. Im not sure thats what you want to do. But I absolutely think your boat will perform better by raising the rpm. It all depends on where your motor makes peak power but from my experience boats tend to perform better with tip speed over pitch. I have a 355 with a 2.68 and a 3 blade R and I have pitched it every which way and it performs best at 5700 rpm. However you will pay the price with cruise rpm. So keeping that in mind do what works best for you but I think you need to pull pitch out and spin the motor faster for better performance. Good luck!!!
2016 14' X 8' Dyna Marine Revo powered by a TKE LS3 swinging a Sensenich 3 blade 81" R with a Ballistic 2.70 box. Fusion deck with 8.8 JL Audio speakers. Custom sea-dek on a Dakota trailer.

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LoxStroker383
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Re: less pitch 383

Post by LoxStroker383 » Mon Jul 13, 2015 3:05 pm

Well any updates?????
14x8 Diamondback, 383 Stroker, 2.38 OxBox, 80" 3 Blade NGR

KBA
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Re: less pitch 383

Post by KBA » Mon Jul 13, 2015 6:17 pm

Sorry for not posting distributor went out however I switched from edelbrock 750 to holley 650 double pumper and picked up 300 rpms boat and left pitch alone cruise and running dry is good

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Bruce
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Re: less pitch 383

Post by Bruce » Mon Jul 13, 2015 11:02 pm

SDeatherage wrote:
KBA wrote:My new 383 with 2.38 stinger and 79" r 3 blade turning a little over 4900 rpms on water with pitch a little over 2 should I take some pitch out and get more rpms motor has howards 180245-10

That prop max rpm is around 2400 rpm. Therefor you would need to spin your motor appx 5700 with a 2.37 box to get the max rpm. Im not sure thats what you want to do. But I absolutely think your boat will perform better by raising the rpm. It all depends on where your motor makes peak power but from my experience boats tend to perform better with tip speed over pitch. I have a 355 with a 2.68 and a 3 blade R and I have pitched it every which way and it performs best at 5700 rpm. However you will pay the price with cruise rpm. So keeping that in mind do what works best for you but I think you need to pull pitch out and spin the motor faster for better performance. Good luck!!!

Waste of the motor in my opinion on a 2.3 ratio with a swept tip prop anything after 5k to 5200 you're just making racket slower tip speed with a good amount of pitch (within reason) is what seems to work
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