Bosch Injector Nozzles - Numbering?

[Ruan]

I'm looking for uprated injectors for an engine I'm working on, originally they use Bosch DSLA142P795 - now as far as I understand the first number - 142 - is the injector spray angle?

Is there any way of deciphering the last numbers to figure out flow, or would that be *far* too simple - or at least some way of being able to know somehow?

Also - does anyone know the difference between DSLA and DLLA nozzles? Seems even the same engine types use DSLA and DLLA alternately?

 

[Seatman]

Does this help?

http://www.myturbodiesel.com/1000q/multi/TDI-nozzle-FAQ.htm#nozzlesize

 

[Ruan]

That is of help yeah, it's just the problem that no one seems have any information on any other engines.

It would seem however that any other injectors there is literally NO information on

It's such a nightmare to know what's out there, any information I've found on things is mostly in Polish or Czechoslovakian and Google Translate doesn't quite understand injector nozzle related things!!!

 

[Seatman]

I take it the french idi uses bosch nozzles? Is that what you're trying to find info on?

 

[Vince Waldon]

The general belief as to why you're not finding any info on IDI nozzle upgrades is because:

a) the part numbers are propriatary and mostly reflect production changes as opposed to any actual performance metrics

b) unlike TDI engines, IDI engines don't generally respond to nozzle changes... as in, the factory nozzles already flow more than enough fuel for anything the top or bottom end can handle.

www.vwdiesel.net is where many of the (remaining) IDI junkies hang out...might be worth poking around there.

 

[Ruan]

Sorry, some slight confusion here, DSLA and DLLA are all Direct Injection nozzles as far as I understand - DNS*D are the prefix for Indirect Nozzles, I currently have an IDI engine,but it appears that the limit seems to be more the fact that the precombustion chambers combined with an alloy cylinder head simply cannot cope with the heat from running such increased levels of fuelling - so I'm looking at M-TDI options for another engine, which is currently Common Rail - the engine is essentially an updated derivative of the old Indirect Injection engine - it even uses the same crank park number, and 99% of the threads on the block are there for mounting an injection pump - I've seen people convert back to "Mechanical" injection in the past, so it's definitely doable, I'm just looking into nozzles which would be suitable from a performance aspect, rather than stock power levels, however, there appears to be no information on performance DI nozzles in that angle.

The other question is - how imperative is the angle? I'd always assumed it'd need to be within probably 2* or so - or you're going to run the risk of hotspots, poor combustion and smoke everywhere - not to mention melted pistons and bore wash in the long run... Is this the case, or is it much less sensitive than that?

Sorry for any confusion!

 

[Seatman]

Cheap one if you were able to get it

http://www.scottishvag.net/viewtopic.php?f=109&t=94567&sid=f59db9fa49e92fc2e48d31d956896a4c


I've also read somewhere about using a landrover injector pump to do a manual tdi conversion.

 

[Norwescan]

I'm looking for uprated injectors for an engine I'm working on, originally they use Bosch DSLA142P795 - now as far as I understand the first number - 142 - is the injector spray angle?

Is there any way of deciphering the last numbers to figure out flow, or would that be *far* too simple - or at least some way of being able to know somehow?

Also - does anyone know the difference between DSLA and DLLA nozzles? Seems even the same engine types use DSLA and DLLA alternately?

The specification is 5 hole x 0,18 x 142 degrees. You cannot switch DSLAxP with DLLAxP - and the P is the length of the nozzle body. 142 degrees is common on Audi V6 and I’ve used DSLA143P970 for more flow at 8 hole x 0.16 x 143 degrees and that is a standard Iveco injector. You may need to play with pop pressure further.

 

[CarlC30]

The specification is 5 hole x 0,18 x 142 degrees. You cannot switch DSLAxP with DLLAxP - and the P is the length of the nozzle body. 142 degrees is common on Audi V6 and I’ve used DSLA143P970 for more flow at 8 hole x 0.16 x 143 degrees and that is a standard Iveco injector. You may need to play with pop pressure further.

Hi Norwescan, hope you're well.

sorry to dig up an ancient thread, but may i ask where did you learn this information about the injector numbers/code?

Im trying to find an injector upgrade for my vehicle which seemingly dont exist so have to do the research myself and this information might help me significantly

Kind regards