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Engine Specific Info and Questions => TDI Engine -General Info => Topic started by: maxigaz on April 06, 2005, 10:26:34 am

Title: who has tried p502 nozzles?
Post by: maxigaz on April 06, 2005, 10:26:34 am: hello ,
did anyone fit the p502(0.216) nozzles on a bone stock ahu 90 hp engine?
how does it work, smoke, etc.....
i measured the holes, and it seems that they are even larger then supposed to, i figured around 0.228. it seems a very big step to me, so i'd like to share your experience.

stef
Title: who has tried p502 nozzles?
Post by: GoFaster on April 06, 2005, 07:28:48 pm: In my 1Z, which is practically the same thing as AHU, I have the Bosch equivalent injectors - the original injectors for the 150hp 5-cylinder TDI engine.

I had to fiddle with the hose leading to the intake pressure sensor and install a mechanical boost controller so that I could get 17 psi (about 1.2 bar) boost pressure. At stock boost pressure, it smokes way too much.

You also need to reduce or disable the EGR (exhaust gas recirculation). This can be done sufficiently with VAG-COM adaptation adjustment.

The hard part is getting the ECU to not "shudder" during highway cruising. I had to shift the top two sections of the pump over very slightly so that VAG-COM reports about 6.4 mg/stroke at idle. Like this, it's OK, I only get shudder in a narrow range of speed and load and only in a narrow range of outside temperature. Can't get rid of it completely.

If you get your chip re-programmed to suit the big injectors, that should solve this, and that's the right way to do it now (couldn't do it at the time I put those injectors in).
Title: who has tried p502 nozzles?
Post by: maxigaz on April 07, 2005, 08:25:20 am: hello
thanks for your answer.
what do you mean by "shudder"?
stef
Title: who has tried p502 nozzles?
Post by: vwmike on April 07, 2005, 12:40:05 pm: Are you referring to the 502 or 520 nozzles? As far as I knew, the 520 nozzles were the 110hp TDI nozzles. If not, then what are the 502's?
Title: who has tried p502 nozzles?
Post by: maxigaz on April 07, 2005, 01:04:01 pm: hello
the p502 are the 0.216 mm hole nozzles, installed on the vw transporter 5 cylinder td, making 150 hp.
i was refering to those since i've got a set.
stef
Title: Re: who has tried p502 nozzles?
Post by: caddy on April 07, 2005, 01:49:13 pm: Quote from: "maxigaz"
hello ,
did anyone fit the p502(0.216) nozzles on a bone stock ahu 90 hp engine?
how does it work, smoke, etc.....
i measured the holes, and it seems that they are even larger then supposed to, i figured around 0.228. it seems a very big step to me, so i'd like to share your experience.

stef

hi stef!
where can you measure the nozzle's hole? in france?
just for the info i sell a set of 0.230 for an alh engine 90hp, litlle smoke , boost at 1.1b and 125hp.dynoed!
so i not realy measured the hole size but they work fine on the alh.
Title: who has tried p502 nozzles?
Post by: caddy on April 07, 2005, 01:52:46 pm: Quote from: "maxigaz"
hello
thanks for your answer.
what do you mean by "shudder"?
stef

shudder i think in french is "des accoups"
Title: who has tried p502 nozzles?
Post by: Blades on April 07, 2005, 02:43:22 pm: Quote from: "caddy"
Quote from: "maxigaz"
hello
thanks for your answer.
what do you mean by "shudder"?
stef

shudder i think in french is "des accoups"

Exactly :)
Exactement ca.
Title: who has tried p502 nozzles?
Post by: vwmike on April 07, 2005, 03:05:52 pm: Quote from: "maxigaz"
hello
the p502 are the 0.216 mm hole nozzles, installed on the vw transporter 5 cylinder td, making 150 hp.
i was refering to those since i've got a set.
stef

Ah, thanks. I think I had my numbers mixed up.
Title: who has tried p502 nozzles?
Post by: maxigaz on April 08, 2005, 01:05:55 am: hello guys, thanks all for your answers.
for caddy:it's funny to exchange in english, but it's a good training.
as for hole measurments, we've got here a very precise machine, since we do micro mecanics.
did you also have shudder on your alh?did you also raise the boost with a leak?
so the 0.230 you've tried aren't p502?it would be interesting measuring them.
cheers stef
Title: who has tried p502 nozzles?
Post by: caddy on April 08, 2005, 01:18:45 am: Quote from: "maxigaz"
hello guys, thanks all for your answers.
for caddy:it's funny to exchange in english, but it's a good training.
as for hole measurments, we've got here a very precise machine, since we do micro mecanics.
did you also have shudder on your alh?did you also raise the boost with a leak?
so the 0.230 you've tried aren't p502?it would be interesting measuring them.
cheers stef

so i can send you nozzles for measure if you can!
i have 230 240 250 260 only one of each because they were a set of 5 nozzle for t4 engine and sell them for 4cyl. and 216 too.
no shudder with them but i just see the dyno test, i don't drive the car to confirm it!
the boost was raise by electronique programmation, that cost 50 eur at the car owner , don't remenber who make this job, i have to ask the guy.

ps: yes that a funny exange! :wink:
Title: who has tried p502 nozzles?
Post by: maxigaz on April 08, 2005, 03:37:16 am: bien sur, no problem!
stef
Title: who has tried p502 nozzles?
Post by: Smog on April 08, 2005, 03:03:54 pm: Quote from: "caddy"
Quote from: "maxigaz"
hello
thanks for your answer.
what do you mean by "shudder"?
stef

shudder i think in french is "des accoups"

c'est une vibration produite par le moteur; les mk3 font cette vibration en régime constant autour de 120km/h alors que les mk4 (alh) le font lorsque l'on ralenti (slow down shudder)

(désolé les anglos)
Title: who has tried p502 nozzles?
Post by: maxigaz on April 08, 2005, 11:30:35 pm: hello smog
is it systematique?(the shudder thing)
stef