Tass 928

I deserved that.

Thank you Ed.


Well played sir.

Ish993

I'll be sure to keep an eye on this thread....
Please be sure to have someone let us know where and when to send the flowers !

DR

Hi Dave,

Great score on getting the Nordic Tunnel, and I am glad to see you are back on the boat project!! As per our previous convos on this subject I am really excited to see your finished project!

The chance of getting a ride in a 928 powered boat could just be the catylist to get me to venture all the way up to your neck of the woods to visit you! :-)

Let me know if there is anything I have laying around you can use on the project. I would be happy to donate to the insanity...err, I mean "cause"... Ha, Ha!

Cheers,

Dave

P.S. everytime I thyink of you rigging a 928 engine in a boat... this pic comes to mind. Not a boat engine pic, just a cool 928 engine install in something besides a 928. Plus the attention to detail reminds me of your work ethic.


BTW, here are some Porsche Boat pics in case you forgot about these. Might give you some design inspiration...also note the Jet Drive in this smaller Porsche boat :-)

bcdavis

So are you going to need to fabricate some kind of connector
between the motor and the jet drive? I am assuming the current
adapter is set up for a Chevy. It's a really cool-looking boat hull though!

pcar928fan

Tough crowd!

DR, I like that gray boat. Who owns it and where does it live?? Very neat!

Tass 928

[QUOTE=DR;8656877]Hi Dave,

Great score on getting the Nordic Tunnel, and I am glad to see you are back on the boat project!! As per our previous convos on this subject I am really excited to see your finished project!

The chance of getting a ride in a 928 powered boat could just be the catylist to get me to venture all the way up to your neck of the woods to visit you! :-)

Let me know if there is anything I have laying around you can use on the project. I would be happy to donate to the insanity...err, I mean "cause"... Ha, Ha!

Cheers,

Dave

P.S. everytime I thyink of you rigging a 928 engine in a boat... this pic comes to mind. Not a boat engine pic, just a cool 928 engine install in something besides a 928. Plus the attention to detail reminds me of your work ethic.

Hi Dave

I have seen ads for that boat ( for something like 400,000 ???) claiming 70 mph but I have a hard time believing they are getting that from an s4 engine and jet drive in such a big boat. Thanks to Mark Anderson, I have every marine part shown in that engine picture. The entire factory "marine kit" weighs a ton. I am going to shelve the closed loop cooling system and water cooled exhaust manifolds for this build.

The main parts I will be using is the special bell housing and a plate that bolts the flywheel to all of the jet drive coupling parts I made.

I will certainly take you up on your offer of tech help First question is do we think the bouncing a boat takes will cause a problem with the air intake plate in the CIS injection system????

Tass 928

I have already machined everything to take me from the 928 crankshaft to splined jet drive shaft. I have a short block that I will be using to test fit the drive and make the motor mounts. The actual engine I will be using is all ready to go. I got it prepped while I was waiting for paperwork on the first boat that I'm now selling.

For those who haven't seen it, I'll post a pic of the engine.

Tass 928

Here is the 83' euro with a custom boat type intake snorkel and water injected headers. The intake encloses a stock 928 air filter.

bcdavis

Very nice!

I am assuming your intake is made to hold the stock air cleaner...

That's awesome that you already have the boat kit stuff to
mount it to the jet drive. So other than the engine mounts,
and hooking stuff up, it shouldn't be a super-huge project
to get the engine in there! Look forward to seeing it out
on the water!

dprantl

Are you going to put a huge spacer on the oil pan and pickup and run twice as much oil? I think that's what that other 928 TT boat engine had, probably for good reason.

Dan
'91 928GT S/C 475hp/460lb.ft

Mike Frye

Tass,

Not sure if there are different rules about boats for freshwater use or whatever you plan to do with it, but in my neck of the woods, a marine engine must have a USCG approved air filter setup which includes a USCG stamped flame arrester. (This page includes info on it, among other USCG requirements.

It's for backfire prevention, mostly because of the potential for a backfire igniting fumes in the bilge, especially after fueling up. (Happens every year or two around here when some genius refuels without the bilge fan on. They refuel, hit the key and BOOM! Smoking hole in the water).

OBehave

Ok, how about "Shark Shooter"?

DR

Funny you say that...when I was looking at the Engine/Air Inlet Pics, the first thought was Dave is going to need at least some sort of braces at the front of that airbox to somewhere on the engine/block/heads. I hadn't thought about the bouncing, but just the air drag alone will break the rubber mounts on the Air Guide.

So yeah, you should do some sort of rubber mounted supports for the "offshore airbox"...I would do front and rear supports from the corners of the airbox if it were me.

OH, and dump the factory air filter for a K&N type 928 Filter, it will hold up better with all the moisture.

Cheers,

Dave

Tass 928

Hi Mike...good advice, I'll look into it. My game plan calls for a completely open engine space, as in no enclosure whatsoever. Accumulated fumes should not be a problem but I still may need to do something to stay within the "rules" .
Here is a picture of what we are shooting for...........................

Tass 928

Dan, very good point. I have some limitations with the centerline of the jet pump shaft ( also the engine crank centerline) to the floor of the engine bay.

I'm pretty sure the stock pan will not hit the floor but I don't know if I have room to make it deeper. Test fitting will give me the answers. I can also modify the pan to be full depth all the way back.....I have no steering or crossmember in the way.

Thanks for the input...I think this is a very good idea and worth pursuing.