Bosch K-jetronic - How to: Modify Your Metering Head

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Bosch K-jetronic - How to: Modify Your Metering Head

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Күн бұрын

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Next up is injector output which is achieved by turning the adjustment screws clockwise increasing pressure on the spring which then moves the metal diagram more once fuel is sent into the chambers
200+ cc/min per injector (output) is easily achievable
120cc/min being stock
CO screw is vital to the function of the metering head when it comes to modifying it
Voltage at the pump
- 12.5 v achieved 5.8 bar
- 11.5 v achieved 5.4 bar
Doesn't sound much but remember 0.4 bar is a huge amount as we have learnt from the first video.
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Пікірлер: 26

@1.6Kilometres Ай бұрын

Righto. I’m going to give this a go on my 81 Volvo B23e. Going to make my Grandad proud.

@BrorAppelsin 9 ай бұрын

Your videos make me feel like I should grab my spare metering head and start fiddling with it...

@GreyGooseRestorations 9 ай бұрын

Do it 👍

@heribertmueller9613 7 ай бұрын

Ingenious idea. Thank you so much for sharing such knowledge.

@jasonbarron9585 Ай бұрын

Not sure why in all my research into K-Jet I've never stumbled across your content. It is excellent, really informative and helps to validate all the reading I've done. I've rebuilt the metering head and WUR (16v variety) on my Mk1, and got it running pretty well. When you are doing your volume tests, are you running your rig with a 'warm' WUR, and what position do you have the air metering plate? Haynes manual for the Mk1 doesn't give per injector volume figures, just says to run until you get 100ml and the others should be within a certain % tolerance. Do you know if there are specified per minute volumes published for the Mk1? Sorry, few questions in there! Keep up the great work.

@GreyGooseRestorations Ай бұрын

Hi, I use a power supply to simulate a warm environment. Minimum fuel is 120cc/min per injector with the plate lifted 25mm from rest and 20cc/min with the plate at 2mm lift Ideally you want zero imbalance across the number of injectors

@jasonbarron9585 Ай бұрын

@@GreyGooseRestorations brilliant, thanks for the reply, time for some tinkering I think!

@predraglukovic7733 9 ай бұрын

What a genius👍

@GreyGooseRestorations 9 ай бұрын

Thanks

@ramarakeshv 9 ай бұрын

Fantastic mate

@GreyGooseRestorations 9 ай бұрын

Thanks

@1.6Kilometres 19 күн бұрын

Do you soda blast the iron fuel distributors to clean the rust off the outside?

@hadlowwww 9 ай бұрын

Really useful video, thanks! Curious as to what you use instead of fuel? Last video you said it helps clean and isnt flammable

@GreyGooseRestorations 9 ай бұрын

Thanks, i use 80/20 approx mix of fuel and jizzer cleaning fluid

@caseytattersall814 Ай бұрын

Hi would the shim modification work on a mk1 golf gti ? And do you need fuel pressure gauge, (havent got one to see p.s I) and how many shims would you recommend without using fuel gauge ,is it best to a pressure gauge? And also would the W.U.R modification work looks slighty different , awesome videos thanks for any help 👍

@GreyGooseRestorations Ай бұрын

You ideally need a set of pressure guages to see whats its going first before upping the pressure. The WUR modification in principle is the same with lowering the control pressure

@caseytattersall814 Ай бұрын

Ok thanks for your help😃 👍

@user-rv7rq4nw8n 9 ай бұрын

You have really helped me understand how my KR works. I’d still worry about splitting that metering head though! By increasing fueling as you do is MPG dramatically reduced?

@GreyGooseRestorations 9 ай бұрын

Thanks, not much to be honest, obviously full throttle applications will use more but if all else is well and set to optimum for the engine you won't notice much

@sergeilosev1416 9 ай бұрын

whats different beetwen KR/9A engines

@GreyGooseRestorations 9 ай бұрын

KR is 1781cc (1.8ltr) and the 9a is a 1984cc (2.0ltr)

@bedo953 8 ай бұрын

Hello! could you tell me an approximate value of the amount of fuel for a Kr engine? for example, how many deciliters should there be in 1 minute at full throttle?

@GreyGooseRestorations 8 ай бұрын

Book figures state 120 cc/min (1.2 deciliters) when rebuilding and flow testing metering head for 16v KR i set them at 140 cc/min (1.4 deciliters)

@bedo953 8 ай бұрын

@@GreyGooseRestorations Thanks