Thread: Tatra V8 engine tear down project

The block is die cast from the look of it.
What date is it?
Really cool looking engine, if you were up here in Sinny I’d luv to have a decko
H.

Originally Posted by clear out

The block is die cast from the look of it.
What date is it?
Really cool looking engine, if you were up here in Sinny I’d luv to have a decko
H.

Don't know mate, best you go on Wikipedia and find out.

Originally Posted by NCArcher

The build you linked looks and sounds awesome. Looks a bit tricky to ride though.
Keep us posted. I will be following your build.
Do you have a base bike in mind?

Thanks mate Yeah it will be more of a straight line cruiser, i may go with a three wheel trike don't know yet. Other people have made v8 motorcycles with these motors. I have a 76 Honda goldwing rolling frame, may have to stretch it a bit. Lots of R&D to do. https://www.youtube.com/watch?v=WEFJ9kkFGN0

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Cleaning still continues on the cylinder heads and cylinder,as i was cleaning this set of rocker arms one side pop off which should not happen as they are press on and i could see some grinding marks on one side of the rocker arm and this was the side of the block were one of the tappets was broken. Decided to chuck up the longer push rod and it is bent, the short one is OK. So replacement is required, will be a couple more push that will be bent i will find out as i couture with the cleaning of the parts.

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Malcolm Oastler built a bike with a Simca Vedette V8 in it some time ago which may interest you. He is an internationally recognised race car designer who has worked in both F1 and American open wheelers so he builds stuff properly.

Originally Posted by Chris Parks

Malcolm Oastler built a bike with a Simca Vedette V8 in it some time ago which may interest you. He is an internationally recognised race car designer who has worked in both F1 and American open wheelers so he builds stuff properly.

Yeah i have watch some of he vids and subscribe to his youtube channel, was looking for a Simca Vedette V8 none here to be found Did find one OS very expensive so went with the Tatra v8.

Originally Posted by jack620

I hope whatever you put this engine in is better looking than the car it came out of!
Good luck with the rebuild.

https://en.wikipedia.org/wiki/Tatra_603

It's a matter of opinion. I think the Tatra cars looks great, and of course I have very good taste.

The V8 engines have been made since well before WW2. Very advanced stuff in its time.

Originally Posted by nadroj

It's a matter of opinion. I think the Tatra cars looks great, and of course I have very good taste.

The V8 engines have been made since well before WW2. Very advanced stuff in its time.

Tatra makes some nice trucks https://www.offroadtrucks.com.au/?gc...RoChGsQAvD_BwE

Originally Posted by Grahame Collins

I had a thought concerning that smashed dizzy cap. I would not expect there will be any spares waiting to be found in a disused European warehouse anywhere?

Given that a bunch of our blokes build and operate 3D printers can thry tell us is it conceivable that a replacement cap could be duplicated on said 3D printer.?

I suppose it is a matter of finding the correct filament material. I know the old time cap was likely to be bakelite, but surely there is some space age wonder material that could be used.

If there was enough left of the pieces could they be glued together to form the model to measure from?

Or is it a rush of excrement to the brain perhaps?

3D printer blokes, is it possible?

Or maybe go straight to electronic ignition.

Grahame

Not having any experience at all with 3D printing, of course I may well be totally wrong, but I would think that it would be quite feasible to make a distributor cap that way. Years ago I had an old magneto refreshed by a chap here in Tasmania who collects and restores old machinery. He had an amazing collection of tractors, all restored and looking in near new condition, as well as I would think, hundreds of chainsaws in similar condition arranged on shelves in a shed that held nothing else, all very impressive.
When he had to make distributor caps or magneto distributors for restorations, he would glue the broken one back together if possible, and bog up any missing bits, and then make a mould before laying the part up in fibreglass. He did an amazing job of it, and from the outside they looked indistinguishable from a brand new cap, colour and even brand on the one I saw, - really smick! It was only when you turned it over and looked at the inside of the cap that you could see the glass matt finish. I don't recall how he did the terminals, but the caps were all fully functional.
I imagine that if you were a dab hand at programs like Fusion 360, printing a cap would be a lot less work than making a mould and then laying it up in glass and fitting all the terminals in just the right spots and in correct alignment.
It's all a moot point here though as the OP is doing away with the distributor altogether, another great project Turbine Builder.

Originally Posted by Ropetangler

Not having any experience at all with 3D printing, of course I may well be totally wrong, but I would think that it would be quite feasible to make a distributor cap that way. Years ago I had an old magneto refreshed by a chap here in Tasmania who collects and restores old machinery. He had an amazing collection of tractors, all restored and looking in near new condition, as well as I would think, hundreds of chainsaws in similar condition arranged on shelves in a shed that held nothing else, all very impressive.
When he had to make distributor caps or magneto distributors for restorations, he would glue the broken one back together if possible, and bog up any missing bits, and then make a mould before laying the part up in fibreglass. He did an amazing job of it, and from the outside they looked indistinguishable from a brand new cap, colour and even brand on the one I saw, - really smick! It was only when you turned it over and looked at the inside of the cap that you could see the glass matt finish. I don't recall how he did the terminals, but the caps were all fully functional.
I imagine that if you were a dab hand at programs like Fusion 360, printing a cap would be a lot less work than making a mould and then laying it up in glass and fitting all the terminals in just the right spots and in correct alignment.
It's all a moot point here though as the OP is doing away with the distributor altogether, another great project Turbine Builder.

Thanks Ropetangler All good have purchase distributor and two distributor caps and two sets of brand new inlet valves for a reasonable price. Been in talks with Alec in the UK he is what he said about the rear crank oil seal and some pics of what he done they always leak oil with the rope seal so this will have to be done on my engine block.
OK, lets get rid of that rope seal.
Had to generate out the original diameter. there isn't enough meat there for a standard seal because there is a labyrinth behind it so you have to make do with that & reduce the thickness of the circlips & also reduce the thickness of the oil seal.
Then you have to machine the finger off the crank & shring a new sleeve on & cylindrical grind it. No pictures of that sorry.

Use nitrile cord in the 2 vertical seals instead of asbestos rope.

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Got some new parts for the motor, got all the gaskets for the motor, 2x new sets of exhaust vales , 2x new sets of inlet vales, new timing chain, 1 x small timing chain sprocket, 3 x distributor caps and NOS set of cylinders they were selling at a good price so i grab them, 1 x use inlet manifold. Also got a use engine block should be here in May.

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Got a couple of photos of this bike with a Tatra motor installed, from Czech Republic i think.

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Parts collecting continues, got a set of new exhaust valves and a set of use con rods, rocker arms, distributors, cabs, coil, cylinder heads.

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[QUOTE=Turbine Builder;1996640]Got a couple of photos of this bike with a Tatra motor installed, from Czech Republic i think./QUOTE]
Looks like a Ural frame and gearbox.... You could use a BMW twin more easily here in Oz....like in the Youtube rat rod you showed earlier.

[QUOTE=jhovel;1998139]

Originally Posted by Turbine Builder

Got a couple of photos of this bike with a Tatra motor installed, from Czech Republic i think./QUOTE]
Looks like a Ural frame and gearbox.... You could use a BMW twin more easily here in Oz....like in the Youtube rat rod you showed earlier.

Hi Joe, yeah i was looking at the BMW but i got the goldwing frame for a good price,as for gearbox will get a moto guzzi box and clutch. AH!! so it might be a ural motorcycle Looks like they are still in production https://www.imz-ural.com.au/c-t