[Tiago]

Is it possible to retrofit the M50d injectors on the E6x or E9x 35d?

[grizzjr1]

Originally Posted by Tiago

Is it possible to retrofit the M50d injectors on the E6x or E9x 35d?

They should be peizo injectors like ours, and should fit. Your car would probably attempt to adapt to them, but I'd be willing to bet your run out of fuel supplied to the rail by the HPFP long before the limits of our stock injectors. M50D injectors would help in getting more fuel delivered low down off the bat, but rail pressure would drop in the higher revs. I just picked up an R90 (vs R70 in our cars) HPFP from Estonia for $120, I'll be installing it next week.

[Tiago]

Great input. Do you have any feedback about cpc nozzles? They have +80% set for our injectors.

[grizzjr1]

Originally Posted by Tiago

Great input. Do you have any feedback about cpc nozzles? They have +80% set for our injectors.

I haven't done a ton of research into injectors for our cars yet, the upgraded pump should be good until its time to do turbos. But even then, I think it'll have plenty of fuel. They are supposed to be a decent company though!

[Tiago]

Can you provide the part number of the HPFP R90 . Do you know if it will retrofit plug and play into the first gen 35d engine with 272hp?

At 440hp the injection of my car has a small margin left. With pump and nozzles should gain more room before jump into new injectors. With the money save i can redone the turbos to higher specs. Target is reliable 500hp on straight diesel.

Edit:
Just realized that 1st gen 35d engines (272hp) has R90 and BMW downgraded 2nd gen (286hp) with the R70.
M50d has higher flow than the above but is left rotation. Ours is right.
So it is injectors or higher flow nozzels.

[grizzjr1]

Originally Posted by Tiago

Can you provide the part number of the HPFP R90 . Do you know if it will retrofit plug and play into the first gen 35d engine with 272hp?

At 440hp the injection of my car has a small margin left. With pump and nozzles should gain more room before jump into new injectors. With the money save i can redone the turbos to higher specs. Target is reliable 500hp on straight diesel.

Edit:
Just realized that 1st gen 35d engines (272hp) has R90 and BMW downgraded 2nd gen (286hp) with the R70.
M50d has higher flow than the above but is left rotation. Ours is right.
So it is injectors or higher flow nozzels.

You want the pump from the pre-LCI 535D, I believe some other models had them as well. 0 445 010 073 is my R90 pump's part number. Allegedly, although from a reliable source, the car will adapt to the larger pump. I was told that the first few starts may throw a code, but it will go away after some driving then not return. 286 and US models have the R70 but larger injector nozzles than the R90 models IIRC. I believe the injector bodies are the same between them. I am mostly concerned about having a rock solid rail pressure at higher RPMs, which is why I chose to go pump first. I am continuing to research though, it would be great if we can get a thread together as far as fuel upgrades go. At some point we will be hitting that wall, granted meth injection helps a lot. As of right now it seems everyone is more focused on supplying enough air, which isn't a bad thing.

[Tiago]

Air is not the problem because it can be increased via turbo and head work with bigger intake valves. Fuel is the limiting factor when you want to run just on straight diesel without adicional injection systems.

My car is pre-lci 35d, so it has the larger R90 pump but smaller solenoid injectors.

Like you said LCI has smaller R70 pump and bigger piezo injectors.

The pumps are interchangeable but the injectors not because it uses different DDE protocols.

So i'm stuck with nozzle upgrade to increase flow. At 2014 BMW released a US version of 535d with single VNT, 256hp and solenoid injectors. Need to research if this injectors has higher potential and if it can be retrofited. All help is welcome.

[Tiago]

For additional information:

Pre-LCI 35d
Intake/Exhaust valves size ▶ 25.9 x 6 x 99.9
(head diameter X stem diameter X lenght, milimeters)

LCI 35d
Exhaust valves size ▶ 25.9 x 6 x 99.9
(PN 11 34 2 247 077)
Intake valves size ▶ 27.4 x 6 x 99.8
(PN 11 34 7 799 612)

Options:
29 x 6 x 100.1 (PN 11 34 7 503 738)
34.9 x 6 x 100 (PN 11 34 7 503 737)

[grizzjr1]

Originally Posted by Tiago

Air is not the problem because it can be increased via turbo and head work with bigger intake valves. Fuel is the limiting factor when you want to run just on straight diesel without adicional injection systems.

My car is pre-lci 35d, so it has the larger R90 pump but smaller solenoid injectors.

Like you said LCI has smaller R70 pump and bigger piezo injectors.

The pumps are interchangeable but the injectors not because it uses different DDE protocols.

So i'm stuck with nozzle upgrade to increase flow. At 2014 BMW released a US version of 535d with single VNT, 256hp and solenoid injectors. Need to research if this injectors has higher potential and if it can be retrofited. All help is welcome.

Ahhh okay, I didn't realize that you have a pre-LCI! Well, pump won't do anything there. Whoops that was my bad on the injectors, I guess I wasn't thinking last night. I've read that a multiple times but must have been having a brain lapse After a little research it seems as though the M50D uses piezo injectors, but they are a different body style than the pre-LCI and LCI M57s. Same goes for the US 535D, even though they are solenoid It looks like any of the N series injectors are a slimmer profile than the M series injectors.

Originally Posted by Tiago

For additional information:

Pre-LCI 35d
Intake/Exhaust valves size ▶ 25.9 x 6 x 99.9
(head diameter X stem diameter X lenght, milimeters)

LCI 35d
Exhaust valves size ▶ 25.9 x 6 x 99.9
(PN 11 34 2 247 077)
Intake valves size ▶ 27.4 x 6 x 99.8
(PN 11 34 7 799 612)

Options:
29 x 6 x 100.1 (PN 11 34 7 503 738)
34.9 x 6 x 100 (PN 11 34 7 503 737)

Wow those are some large valve upgrades! That would be really nice for flow. I'm not familiar with these heads, is there enough meat for those 34.9 mm valves? Even the step up to 29 mm is a large difference. I'm sure that there has to be concerns of valve float, I wonder if anyone is running stronger valve springs.

[Tiago]

I was inspired by this two videos

Although it is a M47, it shares all the moving parts with M57 and the clearances should be also the same just with more 2 cylinders. The 29mm valve fits well and it seems to have room for a bit more. Ideally i want 34.5 intake and 29 exhaust.

They also upgraded the springs but couldn't find yet the brand and specs.

[grizzjr1]

Originally Posted by Tiago

I was inspired by this two videos

Although it is a M47, it shares all the moving parts with M57 and the clearances should be also the same just with more 2 cylinders. The 29mm valve fits well and it seems to have room for a bit more. Ideally i want 34.5 intake and 29 exhaust.

They also upgraded the springs but couldn't find yet the brand and specs.

The guy I have been talking to from the UK is currently working on making his M47 breathe better, with the same approach. I am going to ask him about valve spring plans and keep you updated! 34.5 and 29 would make a hell of a difference.

[Tiago]

Thanks to a member of this forum i found stronger valve springs for +35lbs boost and 4000rpm:

Hamilton Cams M57 Valve Spring

[OmahaDZL]

There is currently a forum member (that I will not tag here just in case he wants to keep his work private until it gets a little further) that is working on a parallel solution.

He is taking our stock injectors and having a company increase the flow possible from them. I know this because he PMd me to inquire about and bought one of my old ones as a prototype.

All I know is, that its in the works.....whats possible is still up in the air....but its being tried from a different angle.

[Whitbread]

Originally Posted by Tiago

Thanks to a member of this forum i found stronger valve springs for +35lbs boost and 4000rpm:

Hamilton Cams M57 Valve Spring

Holy hell! I'm not charging enough for my springs

Originally Posted by OmahaDZL

There is currently a forum member (that I will not tag here just in case he wants to keep his work private until it gets a little further) that is working on a parallel solution.

He is taking our stock injectors and having a company increase the flow possible from them. I know this because he PMd me to inquire about and bought one of my old ones as a prototype.

All I know is, that its in the works.....whats possible is still up in the air....but its being tried from a different angle.

There will be some good news soon

[Tiago]

Originally Posted by Whitbread

Holy hell! I'm not charging enough for my springs

More please. Specs, prices and uprated parts available.

[Hoooper]

Originally Posted by Tiago

Thanks to a member of this forum i found stronger valve springs for +35lbs boost and 4000rpm:

Hamilton Cams M57 Valve Spring

No specs listed? I assume that price is for a full set not just one spring made of platinum or gold? Maybe I missed it but do you have the ratings for our stock springs?

[kydiesel35]

I would say it's for the whole set, still super expensive.

Here's an interesting thread related to the valve springs.

http://forum.bmw5.co.uk/topic/109027...valve-springs/