frozen tunnel ram ?

« **on:** June 08, 2009, 09:01:58 AM »

the intake had ice all over it wen i got back in. i only ran it for 20 min. the motor temp was good and it ran grate.any help would be aprishiated

« **Reply #1 on:** June 08, 2009, 09:06:19 AM »

.....oh shit

« **Reply #2 on:** June 08, 2009, 09:24:52 AM »

has anyone had this happen to them?

« **Reply #3 on:** June 08, 2009, 09:28:02 AM »

mine doesn't make ice, but it will get ice cold and covered with condensation even with it being 110 out. i have been told it is caused by the fuel atomization.

« **Reply #4 on:** June 08, 2009, 09:40:01 AM »

Sounds to me like it was doing what it's supposed to do--increase velocity and cool the gas/air mix. I've heard of them icing up, but have only personally had one get cold. What rpms were you running?

« **Reply #5 on:** June 08, 2009, 09:44:22 AM »

It's a good thing Nat. Go with it....

« **Reply #6 on:** June 08, 2009, 09:51:21 AM »

5500 it ran like a mofo. i got back and seen all that ice and freaked out a little. i guess it a good place to keep the beer

« **Reply #7 on:** June 08, 2009, 10:37:36 AM »

MINE DOES IT ALL THE TIME, ITS ALL GOOD!

« **Reply #8 on:** June 08, 2009, 10:43:46 AM »

thanks guys

« **Reply #9 on:** June 08, 2009, 04:57:07 PM »

Quote from: nathan72 on June 08, 2009, 10:43:46 AM

thanks guys

Mine does the same thing I heard it was a good.

« **Reply #10 on:** June 08, 2009, 04:59:58 PM »

Mine gets nice and frosty... it's supposed to... And I'm jealous of your RPM's...

« **Reply #11 on:** June 08, 2009, 05:05:07 PM »

did you forget to say your running alcohol?...lol

« **Reply #12 on:** June 08, 2009, 05:58:19 PM »

i love it when that happens!!!! sometime if my boat's not running right the tunnel ram won't frost-up though!

« **Reply #13 on:** June 08, 2009, 06:21:25 PM »

What octane fuel were you runnin? My single 4 high rise would all but frost up, I always thought it was because I was running some 110.

« **Reply #14 on:** June 08, 2009, 07:01:27 PM »

When I was test running my BBC 8-71 Bugcatcher EFI set up the top of the bugcatcher got real cold and almost frosted up as well. Got real cold.
T.J.

« **Reply #15 on:** June 08, 2009, 08:03:15 PM »

think of it as a cold air intake

« **Reply #16 on:** June 08, 2009, 09:05:30 PM »

normal condition

« **Reply #17 on:** June 08, 2009, 10:05:37 PM »

Quote from: SLCKREG on June 08, 2009, 06:21:25 PM

What octane fuel were you runnin? My single 4 high rise would all but frost up, I always thought it was because I was running some 110.

92 octane... the first time i have ben over 80 in a boat im still shaking

« **Reply #18 on:** June 08, 2009, 10:13:05 PM »

The correct term for this phenominon is called "latent heat of vaporization" (look it up)

..

The temp of the air charge is actually being lowered by the vaporized fuel, the fuel does not really matter. I am trying to find a picture zi have of a Marathon boat after a hard run, it had 3" icicles swept rearward from the tunnel ram, it was badass...

The same thing will happen on my small blocks air gap, but to less of an extreme (the manifold is too close to the heat of the heads to make much ice.).

GT

« **Reply #19 on:** June 08, 2009, 10:24:11 PM »

im glad its a good thing. it looked like the inside of a old ass freezer

« **Reply #20 on:** June 08, 2009, 10:29:16 PM »

Quote from: nathan72 on June 08, 2009, 10:24:11 PM

im glad its a good thing. it looked like the inside of a old ass freezer

What do you do with an "ass freezer"? LOL

GT

« **Reply #21 on:** June 08, 2009, 11:48:20 PM »

come on GT you remember

« **Reply #22 on:** June 08, 2009, 11:52:50 PM »

Lol Mine gets a little frosty, but the carbs still need a LOT of tuning from someone smarter about it than me, thedn it'll prolly ice up pretty good. Plugs say I'm running a little lean, (White to very light grey). I'll get Terry on it when we hook up again.

Ray

« **Reply #23 on:** June 09, 2009, 12:08:22 AM »

it was way fat so i jeted it down to #72s and #74s the carbs are 750s. the plugs are a nice light root beer ish.

« **Reply #24 on:** June 09, 2009, 04:03:04 AM »

Quote from: nathan72 on June 09, 2009, 12:08:22 AM

it was way fat so i jeted it down to #72s and #74s the carbs are 750s. the plugs are a nice light root beer ish.

So are my carbs (750's). Sounds like you got it about right, I don't yet. Have no idea what's in them yet. It's running, running good, just needs all those little touches to see her capability. But dun worry about the frosting. I was warned about that putting on the tunnel in the first place. Engines like cool mixtures methinks, at least that's the theory, ask the Honda guys.......

Ray

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