Performance Boats Forum banner

1 - 20 of 123 Posts

·
Registered
Joined
·
4,045 Posts
Discussion Starter #1
This is something I am doing this winter! I am planning on building a large cubic inch BBC that I will dyno. I am going to test it with a single 4150(850) carb adapted on a Brodix 2001 intake then go to the 4500 carb(1050)! Next I plan on changing over to the Elde Victor 2R and test with 2 850s adapted then 2 1050s! This is to see what power changes and what will bring the motor to it's top performance!
Yes we all know what a T/R will out perform a single plane but, this will be on paper! And I may even test 2 different dynos to make sure they are on the up an up between the two!
What do yall think is this knowledge or waste! WT:)devil



I know I am going to catch crap on this!:D
 

·
AKA Blownjet 468
Joined
·
1,205 Posts
If you got the money brother, I'd be interested in looking at the numbers!
but your prob. looking at spending over a grand to do this- if it were my
money, I'd throw it in the boat-and go from there:D spend that stack of
frankies on some fuel, beer, and whatever else you got in your weekend
program!:p:D just sayin' - it's YOUR money!
 

·
Registered
Joined
·
4,045 Posts
Discussion Starter #3 (Edited)
I get very reasonable rates on my dyno testing! Once it is loaded it's there till the fat lady Sings! And sing she will! 350.00 till it's done! WT:)devil

It will be dyno tested anyway.
 

·
Distinguished Member
Joined
·
5,772 Posts
Is this a pump or race gas motor? Also what rpm range you targeting (jet or flat)? I've got a very similar combo going together right now. Hoping to get on the dyno mid/late December but not looking real good. Seems I keep getting bumped at the machine shop by "paying customers" :|err :)sphss Regardless, would be real interested in what you find even though I've pretty much made up my mind on which way I'm gonna go.
 

·
Registered
Joined
·
4,677 Posts
what a waste:)sphss

the 2 850s will be just right:)devil
 

·
steelcomp was here
Joined
·
26,515 Posts
Are you going to do cam changes to compliment the intake changes, or is this a one-cam-fits-all test? If you're sticking with one cam, how are you making that choice
Should be interesting. Inconclusive, but interesting.
 

·
Registered
Joined
·
3,869 Posts
Are you going to do cam changes to compliment the intake changes, or is this a one-cam-fits-all test? If you're sticking with one cam, how are you making that choice
Should be interesting. Inconclusive, but interesting.
Inconclusive I agree! Waste of money! I agree! Dyno testing is a paper product that tells you what an engine will produce in a 4 wall room with alot of computer crap. THATS IT. M
 

·
Official Test Driver
Joined
·
863 Posts
Dyno!

Dyno testing is great for Manufacturers to test and perfect combinations, however for what you are doing, the boat can be your best dyno! Enjoy!:D
 

·
Official Test Driver
Joined
·
863 Posts
True Story! We try to simulate ambient Temperature, Humidity and Altitude in our Test Cell, however we can't simulate contaminants and other natures surprises-That is what the Lake Dyno Is For!:D
 

·
Resident Ford Nut
Joined
·
10,075 Posts
Inconclusive I agree! Waste of money! I agree! Dyno testing is a paper product that tells you what an engine will produce in a 4 wall room with alot of computer crap. THATS IT. M
Save it Ol guy. I can know more about my engine in 4 hrs on the dyno than you'll know about yours in 4 years.

S CP
 

·
Resident Ford Nut
Joined
·
10,075 Posts
PERFECT!!! Baselines are good, but invironment is the best dyno! IMLAO M

And how many engines have you had on the dyno ?

S CP
 

·
Official Test Driver
Joined
·
863 Posts
Lots of info on a Dyno, especially if properly equipped with Logging capabilities. You can for sure find your limits without destroying an engine with a Dyno. Like anything else, the Dyno is only as good as the operator!:D
 

·
steelcomp was here
Joined
·
26,515 Posts
Inconclusive I agree! Waste of money! I agree! Dyno testing is a paper product that tells you what an engine will produce in a 4 wall room with alot of computer crap. THATS IT. M
That's not what I was leading to with my "inconclusive". Maybe I should have said "incomplete", but if the information is incomplete, it makes it somewhat inconclusive.
I think dyno's are a great tool, but nothing more. It's merely another method of gathering information. There's a LOT of information gathered before an engine build ever even begins and the dyno is just a continuation of that information gathering process. It's also a great place to baseline tune an engine in a controlled environment, especially a new or unknown combination. It's very helpful to be able to go to the track or wherever knowing basically where you stand, and what to expect. You might also realize on the dyno that going to the track will be a waste of time and money (and could prove real embarassing), and you head back to the drawing board. :mad:
 

·
Resident Ford Nut
Joined
·
10,075 Posts
This is something I am doing this winter! I am planning on building a large cubic inch BBC that I will dyno. I am going to test it with a single 4150(850) carb adapted on a Brodix 2001 intake then go to the 4500 carb(1050)! Next I plan on changing over to the Elde Victor 2R and test with 2 850s adapted then 2 1050s! This is to see what power changes and what will bring the motor to it's top performance!
Yes we all know what a T/R will out perform a single plane but, this will be on paper! And I may even test 2 different dynos to make sure they are on the up an up between the two!
What do yall think is this knowledge or waste! WT:)devil



I know I am going to catch crap on this!:D
It's fun to play with and would be interesting to know a few things but how big of an engine and what rpm ?

There's really no good reason to run an 850 on a 540"+ engine at any rpm range above 5,000 or 5,500 or so. The carb and intake will just "choke" the engine. As Scott stated if this is a single cam engine ( only one cam on the dyno) what combo are you going to choose the cam to match?

Forget about two different dynos, just use a calibrated one to begin with.


If the engine is over 540" and you're going to spin it over 6,500 use an 1,150 or bigger carb on the single carb intake, use a matched set of 1,050's on the T/R intake. Choose the cam for what intake you think you're going to ultimately run.

S CP :D
 

·
Resident Ford Nut
Joined
·
10,075 Posts
It's also a great place to baseline tune an engine in a controlled environment, especially a new or unknown combination. :
Most certainley.

But something tells me even Hendricks dyno's every built engine that was built just like the last 50 :)bulb

I've never walked away from a day on the dyno that I didn't find out something I didn't know 4-8 hrs before.


S CP :D
 

·
Registered
Joined
·
3,869 Posts
Save it Ol guy. I can know more about my engine in 4 hrs on the dyno than you'll know about yours in 4 years.

S CP
OK insults! I can know more about my motor and how it works in the ENVIRONMENT it runs in by 4 minutes on the water instead of 4 hours on the DYNO. Do your'e self a favor and save the "SAVE IT Comments" It doesn't Take my boat 1/4 mile to get there! I have already commended you on your'e achievements on your'e boat and I am running 1/4 motor of the motor and about the same weight WITHOUT nitrous. Thanks M
 

·
"Need For Speed"
Joined
·
1,210 Posts
Don't come to mine if you are looking for big numbers. I calibrate according to Superflow. As Steel said, a dyno is just a comparative tool. Tune for best power curve. Mine is for testing and not engine builder engine sales.

If you are looking for numbers, I can send you to one about 50 miles down the road and you can pick up 50 to 100. All you really have on a given day is the observed or uncorrected.

Gear.
 

·
"Need For Speed"
Joined
·
1,210 Posts
OK insults! I can know more about my motor and how it works in the ENVIRONMENT it runs in by 4 minutes on the water instead of 4 hours on the DYNO. Do your'e self a favor and save the "SAVE IT Comments" It doesn't Take my boat 1/4 mile to get there! I have already commended you on your'e achievements on your'e boat and I am running 1/4 motor of the motor and about the same weight WITHOUT nitrous. Thanks M
Ole guy.... if that is the case you are a genius. I don't know how you can obtain a proper fuel curve, timing curve and know the power curve in four minutes. I agree with real environment and Not trying to insult you at all, but 30 years racing and 15 plus years running a dyno tells me different. I only wish I could hold our A/Fuel engine on our dyno.... but I can't. So we do the next best thing and use a very comprehensive data aquisition unit to assist with tracking fuel, timing and clutch.

Gear
 
1 - 20 of 123 Posts
Top