Author Topic: Making Of The Willy Mammoth (Read 790058 times)

Mattinker · « **Reply #1260 on:** Apr 04, 2006, 02:20:21 PM »

I've been off line for some time, so a little late in picking up the supercharger thread. If I remember correctly, (a little over thirty years have gone by!) two stroke diesels of the Detroit kind cannot run without supercharging, as the crankcase compression isn't sufficient and uncontrollable over reving due to lubricating oil creating fuel excess. Turbo charging and suppercharging have very similar effects on diesels. Not much point in doing both, just a question of getting the boost pressure right!

Matthew

Lady Di · « **Reply #1261 on:** Apr 04, 2006, 02:32:29 PM »

I'm not sure if I am getting what you are saying, but if I am, the engine isn't turbocharged already. We're just putting the supercharger on it.

RHG, there hasn't been any progress since the last pics. We had to pick up the trailer we had on consignment and got busy cleaning up the back yard last weekend.
Hopefully this weekend there will be more pics

I can't wait to see how it turns out either

RS... are you volunteering?

Ramrod · « **Reply #1262 on:** Apr 04, 2006, 02:40:15 PM »

Quote from: Mattinker on Apr 04, 2006, 02:20:21 PM

uncontrollable reving.......... Turbo charging and suppercharging............... effects on diesels...........boost pressure...................

Matthew

that sounds good to me

Willy Mammoth · « **Reply #1263 on:** Apr 04, 2006, 03:19:41 PM »

Someone posted that diesels didn't work with superchargers without a turbo or something like that.
The two stroke diesels need to have a supercharger to schavenge air for the engine cause the can not do it them selves. The superchargers for this are root style blowers that are gear driven and are a positive displacement blower. They will not cavitate if you put your hand over the intake. You will loose an arm!

The supercharger I am using is a centrifugal style like a turbo charger. It is driving by a belt that runs through a set of gears to step up the speed. It will cavitate if the intake is blocked.

There for boost is boost any way you can get it even if it means a funnel on the hood at a zillion mph.

Just don't want the muffler bearing too tight. That could be dangerous.

MiniSimp · « **Reply #1264 on:** Apr 04, 2006, 03:29:30 PM »

Quote from: Willy Mammoth on Apr 04, 2006, 03:19:41 PM

Just don't want the muffler bearing too tight. That could be dangerous.

Been there, done that!

Still paying for it.

Lady Di · « **Reply #1265 on:** Apr 05, 2006, 07:00:34 AM »

trekker · « **Reply #1266 on:** Apr 05, 2006, 06:51:48 PM »

all i can say is wow

gotrocks · « **Reply #1267 on:** Apr 07, 2006, 12:13:08 AM »

i have to say that this is ingenious. I hope you guys make it to the roundup this year because I gotta check this thing out when you get done. One turtle point to you man.

*FFC* · « **Reply #1268 on:** Apr 07, 2006, 11:12:40 AM »

Quote from: trekker on Apr 05, 2006, 06:51:48 PM

all i can say is wow

Lookin great guys! I only get to look at yer thread when I make it to another connection besides home... And each time I make it over I'm like

79coyotefrg · « **Reply #1269 on:** Apr 07, 2006, 06:03:25 PM »

Lady Di · « **Reply #1270 on:** Apr 09, 2006, 09:39:58 AM »

OK some pics from last night, and I'll get more today.

Mark is getting the mold packed in the moistened clay/sand mix, then it will have to dry.
Mark's on-call next week and the following weekend is another Jeep Club campout. Probably the last before it gets to hot to enjoy camping out. So it will be three weeks before it gets poured, that should be plenty of time to dry.

unclejpl4x4 · « **Reply #1271 on:** Apr 09, 2006, 11:10:42 AM »

toybuilt · « **Reply #1272 on:** Apr 09, 2006, 12:12:03 PM »

It looks like he's playing in a sand box

but that is cool

gabriul · « **Reply #1273 on:** Apr 09, 2006, 09:26:42 PM »

Two stroke Diesels... crazy things.

Quote from: bigbluewillys on Apr 04, 2006, 02:40:15 PM

that sounds good to me

lol Well, see only the two stroke "detroit" or "screamin' jimmy's" have issues when not supercharged. All normal diesels can run fine without.
But of course they run much better with A supercharger or a turbo.

Difference between super charged and turbocharged... spool time. Superchargers tend to spool up quicker. And work at a much lower RPM than Turbos..which make them great for Wheelin.

kneedownnate · « **Reply #1274 on:** Apr 09, 2006, 09:46:40 PM »

Ummmm, I thought the boost on a supercharger was more of a constant, ie you don't have to wait for it to spool. As long as the engine is running it's providing boost, which increases with rpm. Herego no lag, no waiting for anything to spool up like a turbo. I dig your radiator Mark

gotrocks · « **Reply #1275 on:** Apr 10, 2006, 10:32:08 AM »

I've done a little casting before and its fun to do. I can't wait to see how your mold turns out

Lady Di · « **Reply #1276 on:** Apr 10, 2006, 01:15:34 PM »

we're got three weeks to wait before we find out if it works at all

Rocksurfer · « **Reply #1277 on:** Apr 10, 2006, 06:47:00 PM »

We will be patently waiting to see $I\'m Down$

Lady Di · « **Reply #1278 on:** Apr 10, 2006, 06:54:53 PM »

I'm not so patient!!

Willy Mammoth · « **Reply #1279 on:** Apr 10, 2006, 06:55:13 PM »

Quote from: Rocksurfer on Apr 10, 2006, 06:47:00 PM

We will be patently waiting to see $I\'m Down$

Sucks, don't it? I want to pour it tomorrow, but it has to dry first then there is this on call crap again and then I here we are going camping.

So I will be waiting too.

RHG · « **Reply #1280 on:** Apr 10, 2006, 11:13:27 PM »

Ok Mr Dubya, could ya go over the casting process a lil for us youngins? I have no idea what the sand and stuff is for

Willy Mammoth · « **Reply #1281 on:** Apr 11, 2006, 03:28:16 PM »

It's like this. You make the part in foam, pack it in sand, melt the aluminum and pour it in the foam runner in the sand. The molten aluminum vaporizes the foam and takes it's place in the sand. When it cools you knock it loose and you have a rough cast part that needs to be machined.