330 Hp to 400 HP
09-19-2011 | 05:22 PM
#41
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From: Riverview, Michigan
And if Mr. Orlandi could chime in and give us the details of the dyno session and the equipment he uses------please?
09-19-2011 | 05:41 PM
#42
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From: Colorado
Yep, I thought it would make more. I'm happy with it for now it was my first engine build. The stock 330 decided to eat the number 7 exhaust valve last year. It's got about 12 hours on it now and I'm trying get the right prop on the boat for it before it goes into storage.
Just JokingIt didn't make any more power above 5k? What exhaust? Rev limiter?
09-19-2011 | 06:33 PM
#44
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From: Western Michigan
Car engines and marine engines are completely different animals....I find it VERY hard to believe that your going to be able to build 550 hp in a 454 with peanut port heads that will work in a boat, possible I guess but highly unlikely. There are lots and lots of variables that are MUCH different than an automotive application.
A marine/boat engine is almost like a heavy duty truck engine---kinda like a huge semi pulling 2 heavy/fully loaded trailers up a very steep mountian road in low gear while having to maintain a minimum speed limit on a hot summer day-----and then on top of ALL of that it ALL needs to be properly COOLED to keep everything nice and happy!
09-19-2011 | 07:20 PM
#45
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From: LSC, MI
Didn't want to spin above 5k, stock bottom end with ARP bolts. Made 407hp with Orlandi's dyno headers so it makes less in the boat. I basically made a Magnum motor, but with HD parts in it. Everything is ARP, big one piece pushrods, roller rockers, good oil pump and pan, stainless and inconel valves. Just wanted a motor with a little more HP than stock that can take some punishment.
09-19-2011 | 07:25 PM
#46
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From: LSC, MI
Brian had to re-jet the carb because it was running lean with the stock jets in the Edelbrock marine 750. His first pull only made 374HP then he put in the biggest jets that Edelbrock makes and did a valve adjustment and it made 407HP safely.
09-19-2011 | 09:53 PM
#47
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Car engines and marine engines are completely different animals. I'm assuming vortecpro is the same vortecpro from the chevelle site. When I built my last engine i consulted with many people on the build of my 427 (440 CI) marine engine. Of which one was Chris Straub from the Chevelle site. He said there was NO WAY i could build more than 425 hp out of that engine and have it work in a boat. I ended up letting Bob Mandara spec the entire engine. We ended up with right around 525 hp at 6100 RPMS. This pushed my Formula 242 to 68 MPH. That said I find it VERY hard to believe that your going to be able to build 550 hp in a 454 with peanut port heads that will work in a boat, possible I guess but highly unlikely. There are lots and lots of variables that are MUCH different than an automotive application.
09-19-2011 | 10:28 PM
#48
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From: Chicago, IL; Onekama, MI
The 560 HP 236 headed engine sported 9.6 comp with a 108 lobe separation, probably not the best combination in a boat, but I couldnt see a problem with my 9.1 compression 112 lobe seperation 467 that can make as much as 530 HP with dry headers, why wouldnt that work with inconnel valves and the correct head gaskets, please be specific.
09-19-2011 | 10:40 PM
#49
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What is the RPM range of the cam? Dry headers are pretty much a no go for most of us, dry to the tip is loud. Full dry is asking for serious trouble, so with that said your cam is going to have to work with a wet exhaust. Your engine is putting out 1.19 hp per cubic inch with really poor heads. I'm running IMO the best 454 head which is the AFR 265 Ovals, 9.9:1 compression and a custom cam, I'm also making 1.19 hp per c.i.. I have better heads, higher compression and a cam from one of the best cam guys in the marine world. I just don't see how you can make the same power per cubic inch. Dynos can vary a lot, unless both engines are dynoed on the same unit we're comparing apples to oranges in my opinion.
09-20-2011 | 09:46 AM
#50
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From: Colorado
The 560 HP 236 headed engine sported 9.6 comp with a 108 lobe separation, probably not the best combination in a boat, but I couldnt see a problem with my 9.1 compression 112 lobe seperation 467 that can make as much as 530 HP with dry headers, why wouldnt that work with inconnel valves and the correct head gaskets, please be specific.
Last edited by Itsallgood995; 09-20-2011 at 09:58 AM.
