BOSCH CIS fuel head upgrade....?

[935TURBO]

Hi turbomen,

who made and wich upgrades for a substencial improvement of the stock CIS fuel head....waiting my futur EFI conversion.....( next 2 years..)


Here's the head.....











The engine base is my 930/66 3.5, SC cams regrind , Pauter rods, 962 twin plug heads, HPV-1 Electromotive ignition....

[RarlyL8]

I have a few sitting on the shelf that are modified and adjusted for 400WHP.

[Thierry25]

Hi Serge

Why do you want to modify the fuel head ?

Just make an upgrade for fuel pumps .... you'll get much enough fuel !

[935TURBO]

Hi Thierry,

wich one did you get / are you using...?

[Thierry25]

Originally Posted by 935TURBO

Hi Thierry,

wich one did you get / are you using...?

I am currently using the 044 BOSCH MOTORSPORT (ref 0 580 254 044) in front of the car. ( And stock rear pump ) . The static fuel system pressure is set arround 7.5 bar. ( just need to shim the fuel pressure regulator). In the mean time, If possible , I also suggest you to use an adjustable WUR and/or to decrease the pressure control by 0.5 at (warm) wot. ( let's say arround 2.5 bar @wot)

With this setup, you will get enough fuel to reach safe 460 - 480 HP.

Within my pending up grade that you saw on the french board and depending the 1st results, I think I will also upgrade the rear pump by the same 044 or by B 261 205 413 . It should be ok for 520 HP without changing the injectors. Thus , if needed, I still have the possibility to install the 3.6 C2T injectors to win 5% more.

In all of case, an injectors matching flow test will help you to get balanced AFR between in cyl.




PS: excellent l'amende sous la tête d'injection

[935TURBO]

Back to my project, and thanks Thierry for infos, did anyone use those BOSCH injectors as an upgrade vs stock injectors....? http://www.*********.com/mmparts/fuel_injectors/mercedes/560sl.html or http://www.***************/mercedes-auto-parts/mercedes-560sl-fuel_injector-replacement.html

Other question (Thierry ?)......what's the best source for the 044 fuel pump....?

Thanks.

[Thierry25]

Originally Posted by 935TURBO

Back to my project, and thanks Thierry for infos, did anyone use those BOSCH injectors as an upgrade vs stock injectors....? Mercedes 560SL Fuel Injectors - Injector - Bosch GB Remanufacturing Standard Motor Products - 1986 1989 1988 86 89 88 - *********.com or http://www.***************/mercedes-auto-parts/mercedes-560sl-fuel_injector-replacement.html

Other question (Thierry ?)......what's the best source for the 044 fuel pump....?

Thanks.

Hi Serge

As to the 044 itself , I bought it to R.P. in france. ( I think with the Bosch ref, many shops can provide the pump to you ).

As to the fittings, I bought these parts to SUMMIT RACING in US.