Three stage switchable anti-lag on the Volvo 940 Turbo?! On STANDARD LH4.2 engine management?!

You see a lot of people in the car world, especially with the internet giving everyone a voice and audience, coming out with some bizzare/stupid/impossible idea/plan for modifications to their car that we all 'KNOW' cant happen.
And, err, I've done one of them to the Volvo.
Considering most the world (inc me for ages!) struggles to get their cars even running ok on the ancient Bosch Jetronic LH4.2 that 90s RWD Volvo Turbos run on, if someone said to anyone, inc me if we went back a few months ago, "I have an idea, I'm going to make a switchable, three stage, WRC-style anti-lag system for my shitbox Volvo 940 Turbo, using the stock and pretty crap LH4.2 engine managment" I'd brand them a dreamer/idiot/etc.
But a few weeks ago I had a thought about something I wanted to try, and through testing the basic thing I originally thought of, and other ideas that stemmed from when I got that built and working, I ended up with what's in this video, which is, basically, what I said above, a switchable, three stage, WRC-style anti-lag system for my shitbox Volvo 940 Turbo, using the stock and pretty crap LH4.2 engine managment!?
This setup still has a long way to go (made lots of tiny changes already, the solenoid is different, and it was never intended to be multiple stage) and no doubt will make more changes as I get more ideas from testing, but the results so far are very promising, and as ever with me, cost me so far is pretty much zero, as it's just all bits I had kicking about or I made from bits I had and modified, and most of this creation was just having the ideas and understanding of it all to make it work in the first place.
The car doesn't NEED this at all, in any way, but I had the idea and I love testing shit so HAD to see if my ideas would work, would bug the hell out of me if I never knew for sure- As you probably have worked out by now, I work off proof and testing rather than the usual BS claims and opinions of the tuning world!
So yeah, check it out, and a say a little prayer that testing continues to show good results...
Stav

[@vauxhall1990]

That will show the fiesta st boyz how it’s done properly 👍🏻

[@tommysutton9361]

savage outro. clever mod! cant wait to see the testing video

[@UFOSorceryEngineering]

Very good éducative video as always Stav!! I really want to install this system on my R32

[@TheVert1]

This is going to be good to see stav

[@msigurko]

Sweet hack!! Great success. Couldn't help it but it reminded me of that shitbox meme - when your riding in your friends shitbox and it's already shaking at 90 and he starts flipping unmarked switches Well done Stav. Well done.

[@chooka29]

Lol, outro and music looks like a clip from Ridge Racer! 👍

[@cappo_nz]

I'd be keen to see a shot of pre throttle body pressure to see how much it is spooling the turbo while on the ALS

[@107gunner]

Awesome 👏🏽

[@wild603]

omg dude thats crazy i love it and carnt wait for on road vid with no music

[@StavTech]

wild603 music was because wind noise went over it all

[@kevinfromdevon]

this is amazing. god i need this on my car. I still have the evo valve you gave me years ago. I'm not sure if you remember but we discussed about me doing this on the mx5, but with a 5 injector controller in the egr pipe. I'm going to dig out the valve 😎

[@kevinfromdevon]

Actually just remembered my plan was to run the 5th injector in the boost pipe. Aimed at the entrance to the valve. So it would squirt into the valve when the valve was open. Im guessing that because I have a mappable ecu, I can just dump fuel and retard the ignition when the tps is at 0% no need for a 5th injector 🤔

[@kevinfromdevon]

I'm guessing that the boost vag controller doesn't need pwm. It can just be open or closed?

[@StavTech]

Dori Professor I’m running it just 12v and seems fine yes

[@HandMadeWrath]

@@StavTech is this possible with a s70?

[@HandMadeWrath]

@@StavTech i have the m4.4

[@sugar4522]

Master

[@mabskha7917]

Legend ! Will you ever consider installing them to other peoples car?

[@ratgreen]

Did I gloss over, what are the switches actually wired into? what are they controlling just that VAG valve with different resistors or something ? Thanks for the vid

[@mabskha7917]

I'm in the same situation. In trying to understand it more, already rewatched it a few times to understand

[@CrispThegamer]

Dear Santa...

[@otacon4065]

you'll have to get that bmw oil cap mapped in or it'll run ropey mate

[@StavTech]

Otacon lol. Tbf it was only on there for 10min while the sealant on the modified Volvo one dried

[@otacon4065]

@@StavTech haha knew you'd enjoy that! I have one on my current of 5 e36 so I'll let you off lol. awesome video. I wanted to know how and what the switches were wired to do what they did tho :(

[@jamesS1OWO]

My thinking is switch two just turns a flamer kit on. You can hear the high pitch spark plug noise in the exhaust. Not knocking it though who cares it sounds and looks cool

[@freemanscott78]

I would name them switches 3,6 and 9 ...after the points you may gain 😂😂...

[@StavTech]

Been there done that, lol. Got done for the antilag on my old Cosworth lol. Found guilty in court and was a £250 fine (almost 20yr ago!) for each offence- "Dangerous emissions from a motor vehicle" one that was something about endangering the public, and one other similar load of shit. BUT non-endorsable offenses!

[@leereed8412]

I noticed you’ve changed the breather system around again oil Cap is different and don’t have the breather going to it anymore any reason why?

[@StavTech]

Because that was an old video, and was using a BMW cap for a couple hours while the sealant dried on the modified original cap.

[@mas_v70]

Will this system work on a 2004 v70 t5? My car is stage 2 contrast tune.

[@warbastard2146]

You are a fucking lunatic genius mate, this is insane. Fucking good show lad👍👍👍

[@saccusgalifinaccus3184]

What exactly are you switching on and off with the switches?

[@guuswesterveld1]

What kind of anti lag valve did you use?

[@volvoturbo4057]

OMG, I want that on my S80 turbo ((

[@gb7207]

How do you get morr fuel

[@lewisdennison7161]

Hi there would you be willing to do this on my Volvo 940 drift car? Moneys waiting

[@StavTech]

Don't work on other peoples cars, sorry.

[@lewisdennison7161]

Stav-Tech ahh ok dude, just interested in the anti lag setup, done a very nice job

[@martinmo195]

Its lh2.4 not 4.2

[@MotorsportPowercom]

Poor car