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New guy with 383 and cam questions

Old 05-13-2020, 01:40 PM
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Default New guy with 383 and cam questions

Hello I am new and have read a ton of posts. Seems everyone has a different opinion or suggestion and the boats are all different sizes and weights. I have looked at Blueprint, Raptor, ATK and others for cam specs. Seems all advertised numbers are not exectly what out of the box cams are.

I have an 06 20' Glastron with 305 and volvo drive. The kids are getting bigger and wakeboarding and skying. This boat is awesome for me and what we do I just want some more torque and speed.

I have an older 350 two piece rear main I was going to build. I think I'm going with a Scat rotating assembly. For the heads probably Dart SHPAluminum 72cc/180cc 2.02/1.60.

I also don't know about wet exhaust or dry exhaust. Eventually I will be going thru hull with Corsa Capt Call. So Cam suggestions are needed.

With a 21 alum prop we go 52-55 (GPS) just 5000. I know ill pick up some speed for sure but also wanting that out of the hole grunt.


Thank you

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Old 05-13-2020, 07:24 PM
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My opinion, if you are buying a rotating assembly, make it a 383 for sure, it costs the same and it will give you what you want. Cam, hydraulic roller, 224/ 230, 112 lsa
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Old 05-13-2020, 07:40 PM
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Thanks for the reply

I should’ve stated I am doing a 383 and the cam was what was in question. Would this cam net me 400+ torque. I should’ve also mentioned that my goal was that as well.

thanks again
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Old 05-13-2020, 08:11 PM
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You may want to take a look at the GM crate 383 specs, sounds like that's what you're looking for. I think it's 425 HP 450 torque.
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Old 05-13-2020, 08:37 PM
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Originally Posted by GPM View Post
My opinion, if you are buying a rotating assembly, make it a 383 for sure, it costs the same and it will give you what you want. Cam, hydraulic roller, 224/ 230, 112 lsa
I would second this. 112-114 LSA, hyd roller highly recommended. 6.0" rods.
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Old 05-15-2020, 11:07 AM
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Thanks for the input. Looking to buy today I think. Why the 6" vs 5.7"? I see Scat has a nice rotating assembly thats balanced and had dish pistons with 6" rods. Depending on heads it will get me around 9:1 give or take.
Thanks
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Old 05-15-2020, 12:05 PM
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More dwell at TDC and BDC. Also less wear on the cyl wall as the piston isn't trying to be pushed through it as hard
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Old 05-15-2020, 12:58 PM
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hmmmmm...20 foot boat,,,,offshore boat???????????

name of this site is OFFSHORE ONLY

Last edited by flashgordon; 05-15-2020 at 12:59 PM. Reason: spelling
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Old 05-17-2020, 11:12 PM
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Oh excuse me. Guess I’ll request my platinum refund and take my business elsewhere. Appreciate the people that did actually help and reply.
thanks again
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Old 05-18-2020, 08:12 AM
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Originally Posted by flashgordon View Post
hmmmmm...20 foot boat,,,,offshore boat???????????

name of this site is OFFSHORE ONLY

The guy is trying to pump up his SBC in the technical Q&A forum because his kids are getting bigger. You tell him to get out of here because his boat isn’t long enough. We are boaters, this isn’t a country club Judge Smails.

Last edited by SecondWind; 05-18-2020 at 10:34 AM. Reason: Grammar
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