stock boost levels for 1.9 TDI ?

[gldgti]

well, unless you plan on changing turbo, adding a big FMIC, full exhaust, and maybe a stud kit, i wouldnt worry about getting a 35psi gauge. thing is, because of the way the VNT works, it can hit a very high boost at low revs for a second on surge, but its still a centrifugal compressor. at high flow rates, it cant make much boost efficiently - the temperature goes way up. so although the standard setup may hit high boost for a second, it will stabilise to something more sane rather quickly.... like the 16-17psi that has been mentioned. even when chipped it wont be much more. you cant just expect a tiny little VNT to pump lots of boost, so the re-flash wont up the boost more than a moderate amount.

this is why people end up having to go for a larger turbo when chasing big power gains - the turbo they have just becomes too inefficient (and wears out too fast).

[85turbo]

Thanks for the info.

I have no plans to replace the turbo , intercooler or exhaust system.
Even if I do end up with a re flash, all I would be looking for would be
a moderate gain. I'm not looking for big hp.

I have already ordered the gauge though.
I had to get the 35 psi one as the gauge I wanted is not available in 30 psi
as a mechanical unit. It is available in 30 psi as electric only.

I got the autometer cobalt gauge.
Now all I need is a suitable pod to mount it in.

Been trying to get in touch with SWG motorsports, as they have the pod I want. But so far after 2 emails I have had no response.

Jason.

[Greg Roles]

likely to be - it produces less power stock

hahaha - i run 22psi guage.... gee thats nearly GT levels. wait till i get my t3 on there... if ever

at the end of the inlet manifold right before the head, or straight out of the turbo matey?? I see 32 plus PSI straight out of the turbo...but that's not what's really hitting the valves, which is all I'm interested in.

[85turbo]

cogdoc.

my plan is to tap the pipe after the intercooler.
this should give me a fairly accurate picture of what the engine is seeing ?

as there is always some pressure drop across any intercooler.

does this idea (the tap position) seem like a good idea ?

Jason.

[Greg Roles]

Yeah, it's where the factory sensor usually is, but there's still more drop through the EGR and throttle flap mechanism, on the golf anyway, so i tapped the actual inlet manifold right before cylinder #4 up one end, so it's as low as it's going to get. Tis a bit scary to tap into this though, so your plan sounds like a good idea.

[85turbo]

thanks.
ill post up some pictures once it's done.

Jason

[glidn]

natively run between 19 - 24psi. After a remap it will only go up around 2-3psi. As the diesel uses an overall tune that ups the PSI as with petrol you can up the boost and remap the fuel accordingly.

[gldgti]

at the end of the inlet manifold right before the head, or straight out of the turbo matey?? I see 32 plus PSI straight out of the turbo...but that's not what's really hitting the valves, which is all I'm interested in.

at the manifold mate

[gldgti]

As the diesel uses an overall tune that ups the PSI as with petrol you can up the boost and remap the fuel accordingly.

pardon??????

[Greg Roles]

...just gassers trying to comprehend oilers.

[decat]

mine, polo 1.9 tdi stock pressure, still can't get it
BLT engine

[gldgti]

rpm on the x axis against boost presure (in KPa) on the y.

i would think... and in absolute pressure too, not guage.