Ive got two old jet washers (both about 20 years old) and are rated at 6.6L/min and 100-120bar max.

I recently acquired a proper foam lance but neither jet washer can produce a nice thick foam like I see in peoples pics of their foamed up FL2s.
I've tried all permutations of the flow and air valve settings and soap dilutions, but I think its down to the jet washers being not up to the job required.

So time to replace them I think.

Anyone recommend a jet washer theyve used with a foam lance at home ? Jules

I use a nilfisk they get great reviews on the detailing forums.

Which model do you have ?
A quick look at their website and it seems they make just about any jet washer you could imagine. Jules

A Titan, £99 in Argos.

I use a Karcher K4 MY14 Kahn Converted Dynamic - Fuji White Ebony/Pimento Interior
MY15 Xenon Headlight Conversion

MY17 RRS SVR - Estoril Blue Cirrus/Ebony 🪣💺’s

I went with the Nilfisk POWERGRIP C-PG 130.2-8 PCDI X-TRA in the end.

Nice long hose.

And at last I have something that powers my foam lance really well. Jules

+1 for Nilfisk  10MY (Sept 09) TD4 HSE Auto in Stornoway Grey (Now Gone)

08 FL2 TD4 SE Manual in Rimini Red (Now Gone)

I bought a Nilfisk from argos and my foam lance works a treat with it. The washer has a long hose too. It also came with a 3 year warranty. I had a karcher but it didnt last long, just out of warranty and it failed. I would definately buy another Nilfisk. Black MY2013 SD4 GS Auto, Wood Company Armrest, Freel2 sticker.
Gone MY2010 Freelander 2 Manual TD4.e S, Alaska White.

I bought the Nilfisk basic model (C105) about 6 years ago, cost about £50 then, still going strong, use it for the car, motorbike, even cleaned all the patios and brickwork round the house with it. Bargain. The foam lance it comes with is not good so like you bought a foam lance for it (cost as much as the pressure washer). Bought a couple of nozzles for it, a 90 degree for under the car and one that is low power giving a fan spray type effect for rinsing.

I don't understand why people dilute the detergent they put in the lances, I put it in neat and use the adjusters to regulate the foam. 
Hung like Einstein, smart as a horse.

I've had a few different makes in the past but the one I have now is a Qualcast and it's by far the best model I have seen for dispensing foam. It has a lance with you can set for low pressure simply by pulling the last section outwards. I then takes soap from the integral tank and sprays a thick coat of foam evenly over the car. It's great - push the section of the lance back in and it reverts to high pressure water only. There are a few different models. I got mine from Argos but plenty of other stockists.

Colin 1982 RR Classic-converted to 200TDi-gone
1992 RR VogueSE- converted to autogas-gone
2000 FL1 3dr (wife's)
1996 Disco 1 300 Tdi(gone)
2007 FL2 TD4 GS auto (gone)
MY 2011 SD4 HSE Automatic