Did david explain or just tell you what it's gonna be. My first guess woulda been around the 380 cnc with some messaging. This would be an awesome TR build but I understand your reasons. 451 runner is a new one for me but I'm in the average build range. I'd love to watch this boat rip across the water when finished.
Better yet in it. Lol...

Yes this is a max effort deal with endurance in mind.

Heads
 

Not really sure what TR mean unless it stands for tunnel ram. Here is the head part number 19775090.

Tunnel ram is Just something I've always wanted to do with a bigger cube engine/engines. Nearly did prior to SC's but next builds will be 598 tall decks. Already had NOS 9.8 blocks and need 900 plus or might as well just take the pontoon out. Have a 12 meter I'm trying to get out of its tracks.

I have a 55mm with carrillo rods need to machine rods to clear camshaft 4.5 stroke just keep that in mind with the 60mm. Plus the roller bearings will take a bunch more meat out by the oil passage I had to bush my blocks to fix oil leakage problem but I am also .937 lifters.

My blocks are raised cam also. We are also putting bronze lifter bushings.

Well they wont hit the rods lol nice blocks.

i don’t think so. Someone specifically stated min CSA in the 20s was smaller than the most aggressive normal angle stuff.

Getrdunn check your pm

Attachment 573359 Re: Brodix sweet 16 This is what you saw from yellow bullet from my post a while back. I don't know if that's true or not.

sounds like a drag race guy building a 9k rpm drag race engine, 60mm cam, 904 lifters, raised cam tunnel.....good luck with the build

Engine specs
 

Well got most of the build specs on the engine today and are super pumped about the builds. It'definitely a different approach for a big hp marine engine. We feel that this combo is going to perform extremely well in our application. Thanks again to David Nickens.

Short block specs
Dart big m block,60mm roller cam bearings,bronze lifter bushings
Callies Magnum crank shaft with fin fin finish on them. David will profile the counter weights and do his little tricks to them to cut down on windage
Carrillo tapered h beam rods with car bolts
Diamond pistons with trend DLC coated wrist pins
Jesel belt drives
ATI alum shell balancers

Induction system
Dart pro 20° 451 cnc heads
Psi Springs
Titanium retainers
Intake and ext valves (;
Bullet Cams Cam specs Big (:
Jesel solid bar rocker stands with Aluminum Intake rockers and SrockersStainless steel exhaust rockers
Trend push rods
​​​​​​​Jesel .904 tie bar lifters
Edelbrock sv632 intake
Holly efi
Accufab throttle bodies cfm big
Billet atomizer injectors

Oil system
Daley 4 stage dry sump pumps
​​​​Steffs offshore dry sump pans
Steffs offshore dry sump tanks

​​​​​​Ignition system
Msd pro Billet slip collar distributors
Msd marine ignition boxes
​​​​​​​Holley Hall effect crank trigger wheels

why not cnp with ING1A coils

^^ Not really sure what you talking about

We are using them in the 665 build this year - we made 949 hp - 936 tq. easily could have been over 1000 hp but we restricted ourselves to the cam selection plus offering very well mannered idle speeds, MAX rpm around the 6200 range and pump gas of 91 octane. The engine runs like a swiss watch even at idle plus acceleration is very strong.

With ING1A coils you have to watch out what you buy because there is knockoffs being sold as well.

alot of the build is posted up here. The bottom end is built to handle 2000 hp. Custom Hilborn. We are running 10 widebands as well for a jist of it.

Very nice

don't know about all this high tec engine stuff , but dam gave me a woody reading all about it . sounds like some serious mojo .. letr eat lol . now if I could just understand half of what I read ,,,,, c ya

I can't wait to put these things on the pump. I feel they are going to make in the high 900s after hearing how much cam shafts and compression in going to be in them.

how much over 11:1 are you going?

It's going to be 11:7:1

First thing happy holidays everyone . The build sounded great until you mentioned David Nickens we used to race comp eliminator in the late 80s early 90s and he was one tough customer I can tell you now you will have one hell of a pair of motors thats a phenomenal crew you're dealing with the build went from great to world class without a doubt. Please share some pictures of the build and the boat that should be a hot set up when you're finished. Sincerely Laz Mesa

Appreciate the kind words. Yes is a great guy to deal with and knows how to make hp and live. It will be very interesting to see how they turn out because this is something he has been wanting to do for a good bit just needed that platform to do it. He feels I'm under rating the hp by time will tell.

Parts are starting to roll in cant wait to get these things on the pump.Got final camshaft specs and they are on there way. Well if it's not fast it will sound that way lol. Will be be posting some up date pics as soon as the big parts start rolling in.

what ring package are going to use?

Not really sure I will ask him and see. He mite want to keep that to him self but I do know they are total seal rings.

I see that Pfauff engines offer a 665 ci pump gas marine engine that makes 950 hp. So my question is why do guys think its so hard to make over 900 hp NA for a marine application.

I don' feel that 1.60 to 1.67 hp per cubic inch is asking for to much out of a engine that has the top end that will move the air.

i guess I’ll bite on this question. It has been my experience (I have had 2 Na high strung Motors built for me in the 580-600ci range by different builders whom have 50-60 years of engine machining and building between them) they are hard on components. It’s not that they don’t live and it’s not that you can’t build them, but they wear out quick especially if ran hard and they eat parts. If I got 30 hours of hard use before they started to go away I was happy. I have also broken a lot of parts while racing. Every time it’s used the lash is checked, every bolt is checked ect, oil is changed every race weekend along with plugs, are they used up? No but What I’m getting at is that I’m attentive to my boat and engine, it is dynoed after it comes out before it is rebuilt if it’s not broken and 30 hours of hard use it’s down 35/40 Hp, the lifters are going away and rockers have some slop in the trunions. I spin it in the 65-6700 (made peak power at 6800) range for 45 mins or so at a time whatever the race distance is. The cam I run has slightly more duration then the ones you talked about and probably slightly less lift. It’s on a standard base circle.

Yes I know you’re running a 60mm cam and 904 lifters Which will help for sure, but still a lot of lift and a lot of rpm is hard on parts. So I do not think that most builders are going to want to build something that they don’t feel is going to last atleast 100 hours. What is your rebuild interval going to be? Also I saw you’re at 11.5-11.7:1 compression you’re planning to be on straight pump gas with them? Again not saying it won’t work I just think you’re going to be on the edge and one bad fuel fill up could be ugly.


Just my thoughts, I’ve been called an idiot many times and I’m sure there is merit in it.

No we run mixed gas. I understand the hard on parts deal. But in our case we don't run our boat that hard and if we do spin up its only for short blast. I could see if a person had a heavy style v bottom or a big cat that these would definitely not be the power for them.

how many hours a year do you boat on average?

We boat alot during the summer. But 100hrs for us in a year would be alot. Our boat will run 100 at 4300 rpm with our old power and they were 975 and we could turn them 6400.

Most of the time boating with the groups we boat in speed stay between 60 to 80 mph.

I couldn't agree more on going Coil Near Plug with IGN1A coils... there's a reason Mercury uses them on all their big engines. Since you're running Holley EFI - and their hall effect setup, it's second nature to eliminate the issues with distributors and the unreliable MSD boxes. You'll have way more control over timing as well (individual cylinder)! You're basically a perfect candidate and it wouldn't cost much more, if any, since you're most of the way down that path and wouldn't need ignition boxes.

Cool build!

We are going to have to hold off on the EFI for know. It's just way to much at this time and there is only one way to do it witch is 110%. We have opted to spend that money on the actual hard parts of the engines to make them nicer.We can all ways go back and put the EFI on them.

I am thinking you would be in the high 900s with that compression and a very good 4brl. Or more with 2-4s. I was able to get 960 at 6800 with the same inches IR intake. And it made 900HP at 5900rpm

I was really wanting to do efi but at this time it don t fit in the budget. So david ordered dominators from book/BRE Not really sure witch ones they mitr even be his billet ones. I have 4 new 4150 style 980cfm new in the box from DaVinci but we are trying to keep it simple. Lol any body needs them they are for sale.

What kind of valve diameter and valve lift are you guys running with the big NA stuff that goes to 6500+ rpm? I would think something in the 2.4 range at minimum, and prob around 1 inch of lift for a 665ci turning that rpm. A cam prob in the 280's/290's at .050?

Is there any reason to stick with a single 4 barrel on a build like this, vs twin 4 barrels?

Our deal is 2.40/1.80 and only around 800 lift. And no were near that duration.

Because those carbs are budget ? Hah ! :).

Better then 11k in efi lol