Rotrex Bomber

[Marcus Nordblom]

Originally Posted by cedric998

curious to know what broke in your engine. did it "go" at high rews or was it more or less normal use ??

brgds
chris

unsure what caused it, think its the rod bearings 2/3 cylinder, pistons are loose up/down a couple of mm……engine sounded like a maracas orchestra. Think it happened when i was on track the last time, maybe something with oil supply or aggressive downshifting

[DVO]

Almost sounds like what I had last time when I broke the engine, suddenly a big rattle. Still do not know what happened, but also suspect some bearing (s) gave way in the bottom end.

Dennis

[Marcus Nordblom]

I thought the rods should go before the bearings, maybe something with insufficient oil supply when engine is a little less tilted than original

Mu headgasket Almost cover the round rear oil drain hole close to 1# cylinder, i guess that is the way it should be?
Can take a pic


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[Marcus Nordblom]

Fittings my LSD after sitting 9 years on the shelf was a bit eager and manage to dremmel 2 holes in the casing when making room for it (mk1 box)

Fingers crossed 🤞 that the box will function after my tear down




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[Marcus Nordblom]

Well, the box did function after my teardown but the diff gave up on track this weekend, have fitted another gearbox now unsure what happened to it, it didn’t feel smooth to start with a lot of mechanical kind of gear shatter when turning, have to take it apart when I have some om spare time



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[Marcus Nordblom]

Took my license this weekendcar did very well, but must build a new linkage, current one kind of lock up when shifting high up in the powerband
Very impressed with my race coils, I was going over curbs like F1 haha




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[Marcus Nordblom]

https://www.flickr.com/gp/77508679@N04/52b64v


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[Purtsi]

yay, it's running again!

[Marcus Nordblom]

Out on a evening shake down testing my new gear linkage, a little to short as it is now, adjustable throw so not a big deal to sort




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[Purtsi]

It's always good to have some adjustability in the parts

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[Marcus Nordblom]

Yep, need to tweak shifter rod slightly
It hits the exhaust shifting 1-2



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[Purtsi]

that looks sexy

[Marcus Nordblom]

It’s super tight, no give no play
It uses two collars that you can slide up an down to adjust the throw
A short gearbox steady to the frame, one end is a uniball and the other is mini original engine steady seams to do the trick and holding the engine nicely.


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[Marcus Nordblom]

Good times put on my ported head and cams, goes like stink



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[Marcus Nordblom]

Evening drive

https://flic.kr/p/2fx1XTy


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