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-   -   Carb opinions 540's 700 hp... (https://www.offshoreonly.com/forums/general-q/324176-carb-opinions-540s-700-hp.html)

mike tkach 03-27-2015 09:23 AM

the origional merc lines are the best!

KAAMA 03-27-2015 09:49 AM


Originally Posted by Full Force (Post 4280496)
I am doing 540's afr 325 cc heads bob m cams nearly every person said to see 700 hp I need Dominators and that is my plan but what might be easier option if height is issue? I cannot go higher then my 4150's are now...

Just wanted to see combos and if using Dominators what kinda jetting to start with ...

Lots of input in this thread---I'm not able to read the entire thread but, when I built a pair of 540cid NA engines about 13 years ago, I used an off the shelf Holley 830cfm carb, and a hyd roller cam 236*/244* @.050" lift and about .600" total lift on the lobes, Dart Pro-1 310cc heads....and at I think we made peak power at about 5400-5500rpm.

These were dyno'd on Tom Earhart's dyno. I will never forget what he told me back then was something like;..."I have dyno'd a lot of engines over the past years, and I have never seen an engine "follow" as well as I have seen on yours today!" Tom felt that the engines responded very well...the best he had seen up until that time.

So, that says something about untouched "off the shelf" carbs from even back about 14 years ago or so. I am not saying the 830cfm Holley's would have given the biggest power over a Dominator or whatever, but they worked great in the boat for an untouched, out of the box little carb on a 540cid NA engine....the boat was a runner.

mike tkach 03-27-2015 09:56 AM


Originally Posted by KAAMA (Post 4284605)
Lots of input in this thread---I'm not able to read the entire thread but, when I built a pair of 540cid NA engines about 13 years ago, I used an off the shelf Holley 830cfm carb, and a hyd roller cam 236*/244* @.050" lift and about .600" total lift on the lobes, Dart Pro-1 310cc heads....and at I think we made peak power at about 5400-5500rpm.

These were dyno'd on Tom Earhart's dyno. I will never forget what he told me back then was something like;..."I have dyno'd a lot of engines over the past years, and I have never seen an engine "follow" as well as I have seen on yours today!" Tom felt that the engines responded very well...the best he had seen up until that time.

So, that says something about untouched "off the shelf" carbs from even back about 14 years ago or so. I am not saying the 830cfm Holley's would have given the biggest power over a Dominator or whatever, but they worked great in the boat for an untouched, out of the box little carb on a 540cid NA engine....the boat was a runner.

good info,but please stop trying to put this thread back on track!,lol.

KAAMA 03-27-2015 10:01 AM

You guys are a HOOT!...I love all the reads! :circle:

Full Force 03-27-2015 10:01 AM

1 Attachment(s)

Originally Posted by mike tkach (Post 4284611)
good info,but please stop trying to put this thread back on track!,lol.

Yea!!!! [ATTACH=CONFIG]539067[/ATTACH]

SB 03-27-2015 10:30 AM


Originally Posted by mike tkach (Post 4284546)
kind of comparing apples&oranges no?as usual this thread got derailed.

i think it's great info. Maybe not for the OP right now or never, who knows....but definately great info as hatch clearance questions pop up a lot.

Rookie 03-27-2015 11:03 AM


Originally Posted by sutphen 30 (Post 4284068)
thought I'd show the difference betw 2200cfm tb vs a 4500 dom,,and MT's carb of choice no less.:D

What brand throttle body is that?

Full Force 03-27-2015 11:38 AM


Originally Posted by SB (Post 4284627)
i think it's great info. Maybe not for the OP right now or never, who knows....but definately great info as hatch clearance questions pop up a lot.

I appreciate it just not even close to in the budget now..

bigboat28 03-27-2015 12:01 PM


Originally Posted by Full Force (Post 4284655)
I appreciate it just not even close to in the budget now..


Tim, i think someone keeps telling me good reliable hp costs money. Lol

cig92 03-27-2015 02:06 PM

why dont you just dyno them with the 850's that you already have and see how the perform and what kind of power they make. your combination has been proven with 850's many of times, if you like what you see then it will solve many of problems for you and keep the money in your pocket. if you don't like the results then you know what you have to buy and how to modify your hatch. you just might be pleasantly surprised at how well they run with the 850's and with the money saved you could boat all summer on your savings. just a thought, cant hurt


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