Havasu
 

Thanks AJ. Your boat looks great. What a great color scheme.

The intercoolers are the MOAC Cupernickel. Gary at GT Performance took the intercooler off yesterday and it is melted. Has to have been a Plenum Fire to melt these. They did find one spark plug wire partially broke and melted. It is possible that maybe this created a spark back up through the distributor and caused a misfire in one cyclinder while the Intake Valve was open. Seems like that would be hard to do.

They are searching for what the cause might have been.

let you know if and whenthey find the cause.

Havasu
 

No special Strainer as of now. The water for the intercooler is plumbed through the main straner for the engine.

I don't think this is the problem If the water or anything got that hot (enough to melt Cupernickel) then there would be many more pieces melted.

Get live temp gauages on the dash, and locate the probes underneath the core and you will see what type of temps you are getting. Do you melt them at idle or underway?

Havasu
 

Underway at about 3500 RPM for 5 minutes or so. Ran close to 140 and 5500 RPM earlier in the day.

I know that boat has been faster than that:party-smiley-004:

Hey sounds like you guys all had a great time. First time in a couple years that I've missed it.

Gator: Too bad about the blower issues. I saw some pics and the new boat is amazing. What's the top speed so far?

Bripar: Sorry to hear about the intercooler issue. I've seen a whipple intercooler come off of a quad rotor motor before that was a little melted (not bad though) and I think that was caused by the motor backfiring through the blower. Sounds like maybe you also have a timing issue like you said. If its an EFI quad rotor, could be some sort of glitch in the fuel injection computer too. I'm sure you'll get it all sorted out and it'll be running hard in no time. Congrats on the boat, looks like fun.

40: Sounds like your boat ran trouble free all weekend? I followed your buildup over on the HB forums so I'm glad to see that its running well after all the work you put into it...congrats.
-Tom

Yeah man, it's running great. Just one #6 drive leak but easily fixed. Had fun running with the guys in the front row as always. Just a few more things to do different on the dash, repaint the drives, repaint the trailer, and were done....:D:D

Havasu
 

Yea AJ I expected that you would comment, seems how the GPS tattle tale still shows exactly 160 MPH from when you had it. . I just need a little time to find out the limits of the boat expecially in roughed up water. I had at least 800 RPM left and it was building speed still but ran out of room. Also I want the thing to last a full weekend which as of now with this intercooler issue hasn't happened yet. How fast has your 40Gone so far? Did you build Quad Whipple Motors or just large single Whipples?

Will you be at Lake Cumberland this year for the Poker Run?

Intercoolers burn because they are on fire. This is not from a backfire, lack of water or high discharge heat. It takes over 2000deg F to melt those CuNi cores, and not a flash, such as a backfire, which subsides when the fuel is burned, but a sustained temp. This is caused from some type of engine misfire or ignition of the fuel coming of the SC. Misfires can happen for multiple reasons, bad distrubutors (cylinder fires too early or too late), lean air fuel in 1 cylinder, bad spark plug, etc. The engine misfire is the most common, it lights the fuel/air charge out of the SC, which comes out at a high pressure, concentrated area causing it to act like a blow torch. The engine must continue to run, that is key, because you can't melt the core in 1 second. Dual engine boats are the worse because you can't feel such a drop in power, but it does lose power. Other applications, with very aggressive camshafts, can have the intake valve open during some part of combustion, allowing the flame to backtrack up through the intercooler, to the air and fuel source (SC).

Thanks,
Dustin

Yes it has bud