JD header

Little Big B · Oct 7, 2008

Anyone Building header/manifolds? im building some and just want to know if anyone else is. how about a turbo set up or a supercharger? thanks LBB

buickanddeere · Oct 8, 2008

Steve Crum builds custom exhaust systems for anything. Premium quality work at an ordianry price.
Have you noticed the Deere uses two very large cylinders with an 180 degree crank? Putt, putt, pause, pause. How do you overcome the pulsing?
The Deere has an open combustion chamber design, not a quench chamber/wedge head. Gains efficeincy but reduces detonation resistance.
You are trying to take an engine designed to plough the back 40 while running on the cheapest fuel the refinerys would sell. And now make it into a race engine.
The engine is designed with small dia and long ports which are heated to vaporize kerosene type fuel.And burn oil type fuels in a spark ignition engine. Half of the intake valve is covered with a shroud to cause turbulance/swirl but it also blocks flow.

Little Big B · Oct 8, 2008

a guy could over come that pulse with an even fire crank put pause put pause. the big thing would be balancing. does anyone make steel flywheels for JD's?

buickanddeere · Oct 9, 2008

The two cylinder Deere is already well balanced and easy to do. It has a 180 degree crank.
How do you keep #1 cylinder from getting a far larger charge than #2 cylinder?
How do you handle the turbo surge problem? The turbo will have to be sized to avoid additive harmonics.
A huge intake and exhaust plenum drops turbo efficiency and worsens turbo lag.

Molinesam · Oct 9, 2008

Little B, an even pulse firing would have both pistons being side by side, firing 360 apart. This is exactly what the Triumph motor cycle did years ago. It was a twin 500cc. Very strong & smooth in its day.

Little Big B · Oct 9, 2008

thats exacly what i was trying to say by an "even fire" crankshaft. cut the crank in half and turn one side 180 then weld it back togather. but the trick would be getting it blalance, atleast thats what im told. but i was also told if you get a steel fly wheel made you might beable to balance it out. i would assume you would have to have a clutch driver to match that though.

Anonymous-0 · Oct 9, 2008

Keith Murfeld built an even fire A 10 years ago by cutting the crank and adding counter balance weights, sounded like a 2 stroke, Mark shellum had it out here to play with when you were a little shaver LBB!!!!!

jd b puller · Oct 9, 2008

(quoted from post at 21:18:56 10/09/08) Keith Murfeld built an even fire A 10 years ago by cutting the crank and adding counter balance weights, sounded like a 2 stroke, Mark shellum had it out here to play with when you were a little shaver LBB!!!!!

That tractor's "in a better place" now.

RandyB(MI) · Oct 9, 2008

Since most tractors are like top fuelers in that they all have more power than they can put to the ground , then why not spend time and money on the clutch/drive train in order to get it all to the ground in a non-wheel spinning manner. Wouldn't be that hard to build a clutch for a 2 cyl Deere that had two drivers and two driven discs and any amount of floating discs and with the correct adjustments and different shaped dogs would act as the top fuel clutch does. Instead of it "snapping" engaged you would just push/pull the lever harder to lock up or let off a little to slip when tires started to spin out. RPM would stay where it needs to be and tires would stay biteing the track and it would absorb the slippage in the clutch where it can't hurt your pull. I have to laugh when I see the "high hp" (some of them) guys spinning out and they don't even know how to get both tires to spin at the same time. You can't get much horsepower to the ground through ONE tire , even if it is spinning 30 mph.

Little Big B · Oct 10, 2008

Ive been told about that one. I take it, it didnt pan out? Do you know where the tractor is now? you would think with hit miss firing order, that when its spinnings some rpms it would keep a turbo spooled up alot better than hit hit miss miss. i just think with some forced induction with that crank it would wake up a JD. but then other things would start to give. shellum's have proven that!

JDGnut · Oct 10, 2008

I've seem them run the turbo into a large canister before the intake to try store some of the volume...

There have been a few turbo Diesels around.. I can think of two.. friend had 730D.. and there was a 70D that was in some of the old Hook mags running a turbo at some high rpms...
I'm sure there have been others that have played with turbo's.. but I haven seen any on gasser 2 cylinders...

Years ago we built a dual exhaust header for the G and ran a duplex carb..I don't know that it made much differance on the tractor it was on.. but it looked good.. haha..

JDGnut

jd b puller · Oct 10, 2008

LBB, yes, I know exactly where the tractor is. It "worked", Mark could tell you more. Very tough to balance, with so much mass floating around.

Seriously, you need to get your head out of the clouds and stop dreaming about turbos and magic cranks. Good to be creative, but you've got the answer to your quest sitting in your garage. From what I saw, you just need some cubes. You're still running a little over stock bore, even with a crank, your engine is about the size of my LH cylinder. Get that Powerblock that you've got put in there with some 5.125" pistons and you'll get the 60 HP you've been dreaming about for the past 3 months.

Little Big B · Oct 10, 2008

Yeah, we have a set of 5.5in pistons. and two power blocks. but the pockets are to shallow right now for anything like that. Is that A forsale by chance?

jd b puller · Oct 10, 2008

(quoted from post at 16:25:15 10/10/08) Yeah, we have a set of 5.5in pistons. and two power blocks. but the pockets are to shallow right now for anything like that. Is that A forsale by chance?

If you can't put 5.5" pistons in, you don't have enough for the tractor

Skip the 5.5's, that is going to run you $1200 or so +rod mods. Get your PB bored to 5.125" and I'll get you some 5.125's reasonable. I've got new ones and used ones.

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