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Tunnel Ram Engines

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Old 10-24-2006, 10:47 AM
  #21
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Default Re: Tunnel Ram Engines

Hey Rob, many boat guys are using the Dart cast tunnel ram, but check out the long runners on that sheet metal intake. Do you know any more about that engine?
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Old 10-24-2006, 11:35 AM
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Default Re: Tunnel Ram Engines

Quote:
Originally Posted by nocigarette
ant time you can get the fuel a liitle higher up it helps with the adomazation, i dont know if i spelled that right.............anyway,,,,,,,,,tunnel rams are great it is just that blowers have come so far in tech it is just easier to supercharge something than tune a wicked tunnel ram set up.........a blower motor is a lot easier to tune than a na motor in my opinion...............
Let me splain it for you:

It's "atomization" where the fuel droplets are made small enough by flow turbulence so they burn properly.

Tunnel rams really work well from 4000 rpm's and above (like 7000). Since most of the Marine engines top out at around 5800 or so they are not always the best choice.

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Old 10-24-2006, 01:42 PM
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Default Re: Tunnel Ram Engines

Quote:
Originally Posted by wannabe
Let me splain it for you:

It's "atomization" where the fuel droplets are made small enough by flow turbulence so they burn properly.

Tunnel rams really work well from 4000 rpm's and above (like 7000). Since most of the Marine engines top out at around 5800 or so they are not always the best choice.

Wannabe
I think that is why Stan Pike and Inferno had problems getting up on plane sometimes. We seem to know alot more about the technology now then they did when Stan was running the set up, back in the later 70s.

Thank you
Jim
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Old 10-24-2006, 01:53 PM
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Default Re: Tunnel Ram Engines

My favorite.....
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Tunnel Ram Engines-zul-750.jpg   Tunnel Ram Engines-zul2.jpg  
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Old 10-24-2006, 01:54 PM
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Default Re: Tunnel Ram Engines

Quote:
Originally Posted by tomcat
Hey Rob, many boat guys are using the Dart cast tunnel ram, but check out the long runners on that sheet metal intake. Do you know any more about that engine?
Richie said he was just playing around with fuel injection seeing what he could do with diff set ups,A test muel. Last year when we were at PRI he ordered some throtal bodys for it then he sold the efi system off it.I think the motor was a 598,dart P1 cnc,solid roller .JC may know more?

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Old 10-24-2006, 02:56 PM
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Default Re: Tunnel Ram Engines

Quote:
Originally Posted by mrhorsepower1
With new cylinder head technology with higher velocity intake ports it's easy to make 700-800 HP with a single 4 barrel set up. But, with a tunnel ram coupled with these new high speed airflow cylinder heads 800 horsepower + is very achievable. I done quite a few of these setups and yes...a set of well set up carbs and the engines are dockable and very dependable as well.
What would you say if I could give you NA engines that put out 800 hp on pump gas, idle at 600 rpm, have an "economy" mode for cruising that saved you 7-10% on fuel, cost no more than a good 800 hp engine does (say 18-20k) would this interest you Mrhorsepower? Or anyone else?

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Old 10-24-2006, 05:46 PM
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Default Re: Tunnel Ram Engines

Quote:
Originally Posted by wannabe
What would you say if I could give you NA engines that put out 800 hp on pump gas, idle at 600 rpm, have an "economy" mode for cruising that saved you 7-10% on fuel, cost no more than a good 800 hp engine does (say 18-20k) would this interest you Mrhorsepower? Or anyone else?

Wannabe
Wouldn't interest me at all. I build engines of my own that already have those features.

Last edited by mrhorsepower1; 10-24-2006 at 05:48 PM.
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Old 10-24-2006, 07:37 PM
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Quote:
Originally Posted by Catmando
There's a drag boat(Loose Cannon I believe) that has an 813ci Ford "Mountain Motor" built by someone in Georgia. Hot boat mag ran an article on drag boats with this boat and motor mentioned. Do you know the engine builder?
most likely John Kaase. He was originally from Westlake , Ohio . My father used to do machine work for John when he was a kid.
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Old 10-24-2006, 09:14 PM
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Default Re: Tunnel Ram Engines

Wannabe, what are the specs on your 18k motor, cubic inch, pistons, headers,carb, etc. how many have you built and what boats are they currently in?
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Old 10-25-2006, 12:02 AM
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Default Re: Tunnel Ram Engines

Quote:
Originally Posted by wannabe
What would you say if I could give you NA engines that put out 800 hp on pump gas, idle at 600 rpm, have an "economy" mode for cruising that saved you 7-10% on fuel, cost no more than a good 800 hp engine does (say 18-20k) would this interest you Mrhorsepower? Or anyone else?

Wannabe
I already have these;

8.9 to 1 compression
one carb
875 horses at 6250 rpm

Fords
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