Compare .200" 's . That will show more within that too, along with IVC and EVO. Assuming you can look up the .200" from Cam Motions lobe catalog.

I know the cam cards supplied only show valve timing events at .050, and duration at .050, and lift of course. Less info than you get when you buy an off the shelf crane cam. So very hard to decipher much about the cam lobe

I understand that. Valve opening / closing events can be figured out easy enough. Can you find lobes in Cam Motions masters and get the ,200 #'s

yes 241/[email protected], 681/663 lift, on a 112.

I don't have, nor can I find their lobe catalog. I have comp and cranes master lobes, but can't find anything that has a 681 lift, .400 lobe with 241* duration. Couldnt find anything from Lunati, Howards, Erson, or crower, that has a .400 lobe in a 241* lobe either. They seem to just not go there.

Comp Cams has a .396/.673/247 in their HUC lobe list which is pretty close to his exhaust lobe. They also have a .243 which is a smidgen smaller (.392).

Bullet also has a 238/.400 lobe

And a 240/.4030 lobe

And a 242/.400 lobe for Bullet

Cam Motion has .400 lobes listed here; http://www.cammotion.com/lobe-list.php

they offer 236 to 274 in .400

These ?

Smallest cam im seeing with .680 lift with 1.7 rocker is 255* there.

Top of Page 29; http://www.compcams.com/Technical/Ca...terCatalog.pdf

Lobes 13861 and 13862 as I posted specs above.

I see them now. Different catalog.

It be interesting to see the lifter acceleration rates between Full Forces 241 .680 lift cam, and the HUC 243 .675 lift cam. Without knowing the rated duration on full forces cam, how can you tell?

You got me, I'm not sure. I don't know enough about fluid dynamics and kinetic energy.

I just completed a swap from a CompCam with 13054/13056 lobes over to a custom grind with almost identical duration numbers @ .050 and same LSA but with higher lift (663/671). We saw a gain of 100 rpm in the boat on the big end without re-jetting. The theory that the Brodix BB3 Xtra 354's would like added lift worked. It was a $500 gamble that paid off.

https://youtu.be/u-5P0vw1UqQ

A while back my 540 blown made 1115 hp, made in 650's NA with blower cam (thin oil) I think was 248/255 @.050 and .650 lift at 8.3-1 compression using modified MPI intake, made in 640's with thick oil, last time same motor and intake but with even bigger cam i think at 255/263 at .050, 680 lift made 630-635 hp NA on my own dyno, way to much cam for low compression motor built to run supercharger, dynoed it to have a NA tune for when blower fails or running saltwater, hoped to make more BUT compression vs a ton of duration is going to be sluggish at a certain point so it is what it is, Smitty

Cams seem huge but evidently work well with your blower.

Those HUC lobes. Oh my. And the description. Who woulda' thunk ? Don't think I'd be man enough without a bunch of people using those first. Lol.

HUC a Loogie! lol

LOL.

Hop Under Control ?

Just ran across this a little earlier. I'm not trying to raise your blood pressure but thought it was somewhat interesting. How accurate the info is I'm not sure.

http://www.chevelles.com/forums/13-p...o-results.html

I love Tony. Really do. Have info on that. Someday we'll talk.

That said...... good head, over 500cid's, 10;1 compression (or more), and it is really hard to overcam a BBC.in terms of making big power #'s.

Now, overcamming in our I/O world, would be to have a cam continbue to make power way beyond where we are going to rev it.and/or idle rpm, and/or exhaust constraints, .and/or parts replacment periods.

Without those I/O non racing boating constraints, a 502 w/10:1 or so compression can make 700hp.

Good thing Bob recommended 325's and a horrible cam, no blood pressure raising I will be changing things at feeders H time and Bob is not on that list of helpers.

Agreed, calling for moderators to ban him until build thread is posted... Bravo 3 lowers are very strong, the uppers are the weak spot on these boats. Easy on, Easy off, drive showers, amsoil marine lube mixed with lucas oil snot. Lets see this boat!

Only if it's a custom grind. lol

Did you want a CNC'd head (315cc)? The CC' porting on the 315cc is about $1000 more expensive per set then the 325's.

If you wanted to spend the extra dough, I might have suggest you go with the 335 in case you expected to increase cubic inches in the future. As a cast head with a partially cnc bown, the 325 is a good head on a 540 IMHO. There's a bunch of others that are good too. Just depends what you're looking to get out of it.

Nooooo don't ban me��
I promise to post some pics when I'm done, literally working 12-14hr days until it's done!
Picked up second motor yesterday made almost exactly same power (+3hp) .....off to install

I wanted 700 ish hp, so I told bob to give me the heads and cam to do so, knowing I could not go dominator and used a 1050 4150 style carb he said easily 680+ I saw 630.... Bob failed at my combo. Looking back is seems a 315 head and 741 cam would have been the best choice for my goals.

Long Day both now in bilge and One is running https://youtu.be/iDanvhURngc

Hell yea, excited for you. Spent 4 days on the 47' god they are awesome boats...

Love ours- May 28th I cut out the transom...tonight I'm sleeping on the boat in Block Island...damn I'm tired!
https://youtu.be/rlBuJjfO5R4

I recall you saying they both were within a few HP also. i think Bob stretched the limits for out of the box 325's and custom ground cam. What intake did you end up with? Example of a 540/650hp package Gellner was doing was out of the box 310's, dart intake, 4150/1050 carb. Without full CNC heads or porting to get close to and above advertised flow numbers I would think 700 would be pushing it. I am going fully ported heads with raised floors etc including intake work at 10.5:1 comp and custom ground cam on 555 builds and targeting 700 plus hp @ or under 5,800. I won't leave the dyno til I get it. I wonder how many 540's are out making 700 hp under 6k on pump gas are out there and if so what their recipe is?

yes both engines were within 3 hp, that was my building them identical, not Bob.

As far as 700 HP or close with 325 AFR heads, they have the cnc chamber and bowl work done, and are also a 325CC head easily a 700 HP head, as far as the cam? he is way off and it showed on the dyno, intakes are pro comp from last engines, with 1050 carbs, Cigrocket built 540's with 315 heads and a 741 cam and made 685 hp, so I could have done much better, wish I knew then what I knew now... all I got was less speed out of my boat and a cam that's going to destroy stuff....

So Tim, when are you gonna swap to a 741 or 651 cam or similar? What comp are your 540s?

Probably when I refresh, or have an issue... I will re think entire top end. They are 9.5:1

So how does it run out?