1989 Skoda 120L5 - 136 Engine&Bike carbs - 2023 Winter Jobs

You really need to tweak the dizzy if its standard for a bit more advance at high revs and weaker springs so it comes in earlier. The standard 130 / 136 dizzys were designed to stop the engines revving past about 5000rpm.

Jetting wise for the carbs, I'm not sure because the guy I bought them off had them set up ata rolling road place and unhelpfully they used drills to set the jets, rather than weber jets that fit....

I am running the stock fuel pump at the mo, but it leans out at the top end so have bought a bike elec fuel pump.

Filter wise, the guys at Bogg Bros say that with bike carbs, the secret is a big airbox, so when you floor it, the carbs have a nice supply of "clean" air.

My carbs are from an FZR600 so need to be mounted semi down draught, otherwise the carbs will flood constantly.

Well a little bit more progress today.

I finished tidying the shed (only took about three months lol!) and mounted the new engine on my engine stand.

First things first was to dig out and lay out all my bits and bobs.



I have some different speakers to fit into the front of the car in the origional pods



I hung the exhaust manfold onto the engine which appears to work, but I will need to see if it clashes with any of the coolant pipes in the bay



Dizzy fitted



Engine and box getting closer together



I then set about the standard paint combo for the rocker cover.



Cleaned in the skink. SWMBO not impressed

Masked up and ready for paint



Primer and satin black



Then the raised areas sanded and brushed.



Not much work, but satisfying none the less

Lewis

That's exactly how I want my rocker cover ;D! This car is starting to look really deadly! Just had a thought, continue the black/white theme, how about doing the bare metal white? Or if not I can do that

No fuel pressure regulator needed.

Hey, My rocker cover looks like that:



Great minds and all that.....

That was my thoughts originally, but finding a tupperware box long enough is difficult. And also, because the carbs sit high (semi down draught remember) it would have to be really shallow, which negates the point of an airbox really.

Options are individual bolt on filters (easily available) or a custom airbox (like Ive gone for).

I got some thin ali sheet and formed an airbox. Just waiting for some carb rubbers to attache it to the carbs.

Hmm food for thought there.

It stands to reason that if I am making my own intake, I could make my own exhaust manifold too!

Thanks for all the info Kieran. Looks like we will be engine bling buddies lol! I have a fairly long box at home (fnar!) but I also have access to lots of ali sheet etc so could also do that, although I don't have access to a welder able to do ali. Perhaps some thin steel would do the job.

I was wondering about making an air box for the car intakes that then extends out into the back of the engine bay and up to the boot lid. It might then be possible to fit a panel filter into the box and cut lovres in the boot lid. That way giving a nice volume of air to the carbs whilst getting a nice cold air.

Lots of possibilites really. I will get the engine into the car first then start working on the finer details.

Any other tips on getting the bike carbs happy would be greatly recieved.

Lewis

Hi there.

Please show me/us your car, sounds like a hoot!

Lewis

Thanks for the info.

I managed a bit more work this weekend. Not much work on the car, but spent most the time repainting my hallway. Its not big but double height over the stairs which makes acess really hard. Took about four times as long as it really should have done!

Anyway

First of the door cards going on. I like it! Just need some black dome head allen bolts for the edges.





Then on to adding more parts to the engine. Dizzy cap and leads, alternator and brackets and engine mounts. It is a bit of a fiddle as I am mixing and matching parts from 3 different engines.





Checking out the ported head and fitting a gasket.



I then started looking at the intake manifold. I have some suitable sized tubes that fit the carb



but the ports are smaller



(bit out of perspective in the shot but you get the idea.

So what I want to try is to cut slashes in the pipe and reweld to make a tapered tube.



Thats all folks

Lewis

Seth - Good point on the cutting.

I have done some fag packet sums and will mark out more accurately before I cut. I think this first one will be an exrecise to see if I can actually do it well. If so I would probably scrap it and make all four in one go using lessons learned from the first one. I have loads of tube so no real worry there.

Lewis