B21ft Warm up Regulator

I'm pretty sure that's the same part as found on any 70s/early 80s 240 with a B21 or B23

Have you tried this guy?

https://k-jet.biz/

The same guy that's trying to sell it all on Facebook here. I'm pretty sure the b21ft cpr does not account for boost, I believe boost enrichment is achieved via the lambda feedback system. It might respond to vacuum, though I myself don't know how or why you need fuel trimming during vacuum...

The b21et however uses the cpr to sense boost, which is the same ones I have, p/n ends in .....082.

Although kjet has a small market, these types of cpr's are rare-ish and are usually expensive from people who know what they have.

Lastly, like almost every other person who's experimented with kjet, my advise is to not touch kjet unless you are hell bent on it or an originality freak etc etc, or you have money to burn...

The b27 might be a dual diaphragm type but it is for vacuum, not boost.

K-jet is actually an extraordinarily simple fuel injection system, IF you understand its workings. It is a simple system however each and all of its components need to be 100% functional, it is at this point where people give up, due to not knowing. Many millions of cars were k-jet equipped, and it only takes someone with a basic knowledge to make it work.

I would encourage those with an interest to learn about how it works, so troubleshooting isn't so frightening

I totally agree that kjet is fkn awesome. So much props to the guys who designed it...

The age of components is a massive limiting factor. Sure, you can refurbish the distributor and cpr, however the injectors are where this ends. They are non serviceable - your only option these days is to either blast out any crud and make do with what you have or go on a wild goose chase finding some that might or might not be in any better condition... The cost of all this goes through the roof...

Replacement fuel line is expensive and hard to find, your only bet is specialist kjet retailers. This is also applicable to fittings however you can reuse old fittings, keyword old.

Firstly, I'll admit I don't know what stock kjet is like in regards to afr's. My problem was/is having a car that cruises at 1.1 lambda and richens to stoich in boost. I'm pretty sure that's lean and detrimental to the motor. Further more it runs out of fuel at 5k rpm. This was at 5psi. Refurbed distr and cpr. All my fuel pressures and flow rates were spot on as specified. Perhaps the distributor/amm from the 2.1 doesn't allow enough fuel? Idk.

After everything I did, I was over spending so much money and I could have had a top of the range efi setup on it and making way more power, a cleaner looking engine bay, more efficient, serviceable and replaceable items, the list goes on... Saying that, at the time I didn't care about any of that stuff, I wanted something unique and that I built entirely myself.

Right now it's sitting there as a 'running' car but de reg because I lost so much money and can't afford to keep going the way I was going, not to mention blowing the motor.

Listen to what 90% of people are saying and go efi if your going turbo...

I'm the same dude you messaged on Facebook that's selling the whole kit.

One map port and it is for boost

Josh, when you get a replacement turbo version there is a little trick you can do.

Underneath there is a metal disc (on your pic see 7) with a spring above and it has a hex to suit an Allen key. By turning either way you can adjust the systems control fuel pressure.

To gain access you drill a hole in the outer alloy casing.

if you can’t obtain a new reg you can carefully dismantle it and inspect. Often it’s just a dead heater, or rust inside a specific part.