Anyone run 108 LSA cams in boat before? 700 HP DYNO proven combos welcome...
09-01-2016, 10:21 PM
#51
Geronimo36
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My point was, if he didn't make a big change in this setup, i don't think the 108* cam is gonna a do it in my opinion. I could be wrong, who knows.
I think he would then need to make it a higher compression engine that's built to turn higher rpm then 5500. Sorta like a Supercat Engine for example. Without cubes it needs compression and rpm to make power and with that comes the associated valvetrain. Otherwise, add cubes or bolt on displacement.
I think he would then need to make it a higher compression engine that's built to turn higher rpm then 5500. Sorta like a Supercat Engine for example. Without cubes it needs compression and rpm to make power and with that comes the associated valvetrain. Otherwise, add cubes or bolt on displacement.
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KAAMA (06-05-2023)
09-02-2016, 05:01 AM
#52
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I never said keep things the same but change to 108, I have had success in auto engines running it, so I wanted to see if the same success carries over to boat engines... gathering info for the future..
My point was, if he didn't make a big change in this setup, i don't think the 108* cam is gonna a do it in my opinion. I could be wrong, who knows.
I think he would then need to make it a higher compression engine that's built to turn higher rpm then 5500. Sorta like a Supercat Engine for example. Without cubes it needs compression and rpm to make power and with that comes the associated valvetrain. Otherwise, add cubes or bolt on displacement.
I think he would then need to make it a higher compression engine that's built to turn higher rpm then 5500. Sorta like a Supercat Engine for example. Without cubes it needs compression and rpm to make power and with that comes the associated valvetrain. Otherwise, add cubes or bolt on displacement.
09-02-2016, 08:14 AM
#53
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It`s not worth it to pull engine just to change cams. That isn`t going to do squat.
You should have stopped being a hard headed jacks ass and changed the cam after or during Retters dyno like about a million people told you to do .
I`m going to go ahead and say " I ****ing told you !!!!!!!!!!!!!!!!!!!!!!!!!!!!!
You should have stopped being a hard headed jacks ass and changed the cam after or during Retters dyno like about a million people told you to do .
I`m going to go ahead and say " I ****ing told you !!!!!!!!!!!!!!!!!!!!!!!!!!!!!
09-02-2016, 10:11 AM
#54
The only reason I'd switch cams is if there is evidence that the valvetrain cannot handle the lobes. To determine this, the heads will have to come off, seats inspected and the springs pulled and checked for PSI. Just switching cams without determining if you have a problem is a crapshoot. Maybe you pick up some power and maybe no.
Even if a cam swap would net you 40 HP, the difference in the boat would be a couple MPH.
Use the dough for fuel and beer.
Even if a cam swap would net you 40 HP, the difference in the boat would be a couple MPH.
Use the dough for fuel and beer.
09-02-2016, 10:23 AM
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Lol I know but $ wasn't there at the time, still not sure what I'm going I might leave it until I need to mess with it...
It`s not worth it to pull engine just to change cams. That isn`t going to do squat.
You should have stopped being a hard headed jacks ass and changed the cam after or during Retters dyno like about a million people told you to do .
I`m going to go ahead and say " I ****ing told you !!!!!!!!!!!!!!!!!!!!!!!!!!!!!
You should have stopped being a hard headed jacks ass and changed the cam after or during Retters dyno like about a million people told you to do .
I`m going to go ahead and say " I ****ing told you !!!!!!!!!!!!!!!!!!!!!!!!!!!!!
09-02-2016, 12:32 PM
#56
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The only reason I'd switch cams is if there is evidence that the valvetrain cannot handle the lobes. To determine this, the heads will have to come off, seats inspected and the springs pulled and checked for PSI. Just switching cams without determining if you have a problem is a crapshoot. Maybe you pick up some power and maybe no.
Even if a cam swap would net you 40 HP, the difference in the boat would be a couple MPH.
Use the dough for fuel and beer.
Even if a cam swap would net you 40 HP, the difference in the boat would be a couple MPH.
Use the dough for fuel and beer.
09-02-2016, 02:49 PM
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Pull a valve cover and check seat pressure. See where you're at before going overboard chances are your springs are in perfect shape. Im sure you have VERY good valve springs in your engine....
09-03-2016, 09:12 AM
#58
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You cam guys, when you are picking your cam off head flow numbers, are you using the exhaust flow numbers when flowed with a pipe, or the exhaust flow numbers without the pipe? The pipe bolted to the port, can really increase the cfm. Using the pipe, you might think you need a few degrees less exhaust duration. What about a manifold system, vs a tuned header? Would the cam specs factor that in? Not talking about water reversion.
As a camshaft guy/engine designer/induction specialist/ , i would think the best way to improve your product, would be from first hand testing. The simulators, calculators, and big vocabulary only go so far. Having your own dyno, to try all kinds of things, some textbook, some not, and so on, is priceless. Relying on feedback from a customers engine build that was dynoed 2,000 miles away, under who knows what circumstances, is just Leaving too many variables. Id love to start a business where i could sell a product, and let the customer do the testing for me, on their dime to see how it works out. If it doesnt, i could just blame the builder, the dyno, the tuning, or whatever, but def not the cam.
Seems like bobs cams are all fairly tight split from intake to exhaust. Maybe because he believes afr has the super duper industrys best exhaust port. The couple engine builds where i know they swapped those cams out, for a diffent cam with a little more split and less lift, the power went up.
As a camshaft guy/engine designer/induction specialist/ , i would think the best way to improve your product, would be from first hand testing. The simulators, calculators, and big vocabulary only go so far. Having your own dyno, to try all kinds of things, some textbook, some not, and so on, is priceless. Relying on feedback from a customers engine build that was dynoed 2,000 miles away, under who knows what circumstances, is just Leaving too many variables. Id love to start a business where i could sell a product, and let the customer do the testing for me, on their dime to see how it works out. If it doesnt, i could just blame the builder, the dyno, the tuning, or whatever, but def not the cam.
Seems like bobs cams are all fairly tight split from intake to exhaust. Maybe because he believes afr has the super duper industrys best exhaust port. The couple engine builds where i know they swapped those cams out, for a diffent cam with a little more split and less lift, the power went up.
