New option for fuel system - FL5/FK8/DE5

[Deleted member 42584]

Hi community,

I am writing this post to disclose the fuel system option for bosch ECU platform, I hope this will give you some inspiration to discover the fuel system.

Generally speaking, OEM fuel systems are purchased from suppliers as a complete package, and most cars are provided by Bosch, which is why CTR uses a BOSCH ECU instead of other Honda's KEIHIN。

From this, can we see that the BOSCH fuel system on other cars can be directly transplanted to the CTR? (injector same rule)

The answer is YES.

This time I chose to transplant the popular B58TU HPFP on the BMW platform to the FL5. This HPFP is already a very popular transplant in the BMW community with its very high performance (up to 350bar). Whether you have an N series or B series non-TU engine, you will transplant this HPFP to get enough fuel supply.

I have been test this pump for almost a year , and it is very solid with its performance and stability, you can even run the stock calibration with this HPFP, nothing needs to be change, or you can run it with tune and drilled fuel line for maximum performance .

My car is running the RV6 660 turbo/ 1330injector with this fuel mod, the HP fuel lines are built with bmw and honda stock fuel line by cutting half of them and weld them together.

For the pump itself , you will need to drill a hold and cut some of the base edge to fit into K20C, and make the convertion wire with bmw and honda connector.

The result from hondata's datalog are very strong , this pump can supply very rich AFR and only with 60~70% load by running almost 350g/s AFM with almost 30psi.

Help yourself with this information , this pump is cheap and well perform.

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[Ohlins8990]

Note…I work around diesel engine HP fuel systems.

1. At least on the diesel side, Bosch doesn’t control their stuff the greatest. Can you tune the PID control for rail pressure in Hondata to account for the increased pump flow.

2. Diesel pumps operate at another magnitude higher of pressure to these, but I worry about contact stresses in the cam causing premature wear?

3. THIS is the big one to me…

Welding a high pressure line is asking for issues. If that weld has any porosity in it you are asking for a HP leak. Not only is that a fire risk, but they can be very dangerous to be around (imagine water jet that you cant see). At work we’ll bend up lines, but the times we have welded lines (even 100bar/1500psi ones) they always end up failing.

This is all just food for thought. Glad to have people working on the platform.

 

[Deleted member 42584]

Note…I work around diesel engine HP fuel systems.

1. At least on the diesel side, Bosch doesn’t control their stuff the greatest. Can you tune the PID control for rail pressure in Hondata to account for the increased pump flow.

2. Diesel pumps operate at another magnitude higher of pressure to these, but I worry about contact stresses in the cam causing premature wear?

3. THIS is the big one to me…

Welding a high pressure line is asking for issues. If that weld has any porosity in it you are asking for a HP leak. Not only is that a fire risk, but they can be very dangerous to be around (imagine water jet that you cant see). At work we’ll bend up lines, but the times we have welded lines (even 100bar/1500psi ones) they always end up failing.

This is all just food for thought. Glad to have people working on the platform.

1. Yes, you can , and the stock calibration is well enough to control this pump.

2. i dont know the disel pump, but this pump is similar contact stresses with the XDI ones.

3. That's why i am sharing this information to see if anyone or a company can develop the HPFL for this pump to use in K20C fitment, my HPFL is very a experimental one and use only with my own very high risk to do this experiment.

Thank you for your information.

 

[Ryan Ho]

 

[NoviceFL5owner]

It might be safer and easier to have a new hpfl made to fit to the BMW pump.
What did you do to connect the connector? Did you use a jumper harness? If you did, Do you have a part number for the BMW plug? These are all things in my wheelhouse.

 

[NoviceFL5owner]

Also curious if you looked into maybe Honda/Acura v6 pumps to see if they supply adequate fuel and maybe easier to adapt?

 

[Deleted member 42584]

It might be safer and easier to have a new hpfl made to fit to the BMW pump.
What did you do to connect the connector? Did you use a jumper harness? If you did, Do you have a part number for the BMW plug? These are all things in my wheelhouse.

Yes, that is point why i am sharing this information. Hoping if anyone could made it perfect.

Because you could not find any new HPFL with one side fits to the B58TU PUMP and other side fits to the honda's fuel rail, so i only can weld one for testing.

For connector , i am sorry that i dont know the part number since i am cutting the connector from junk car.

But i find some information from internet for your information.

The male side is for stock connector to the conversion wire.

And this side goes into the HPFP.

 

[Deleted member 42584]

Also curious if you looked into maybe Honda/Acura v6 pumps to see if they supply adequate fuel and maybe easier to adapt?

It wont be easier, totally the same process you will need to do.

Also, as i mentioned before , check your ECU maker first, if the V6s' are made by another manufacturer, you cant adapt it to this car. BOSCH only.

 

[VtecSlayer]

@Jester04 for visibility

 

[VtecSlayer]

PM me the plug info and I'll make some prototypes for you guys. I can make them mil-spec

 

[NoviceFL5owner]

Here's one side that I found. It's the third one down.

http://www.cycleterminal.com/bosch-kompact.html

 

[Jester04]

Honestly this is very involved and above the skill level of most people.

I still recommend the Full race pump above all else.

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