Thread: Turbo Boost

If you have a boostbox, the Nanocom readings aren't correct as they're being modified by the unit.
The only way you will see actual figures is from a gauge with an independent sensor at the manifold.

Andrew

Originally Posted by rapserv

Nanocom (connected to notebook) shows ambient pressure at 82.12 and max pressure at inlet manifold of 202.8 ... levels off here and won't go higher, possibly because I have a TD5_Alive wastegate controller installed.
I assume that the Nanocoms readings are in Bar and if so, then this converts to 12.068psi and 29.697 respectively.

For the pedants (like me) 1 Bar = 100 kPa (= 1 hectopascal) which is approx 1 atm. So if the psi ranges you refer to are about right, then I assume its reading in kPa. If it is reading in kPa, then 82.12 kPa is 11.91psi.

Mundy

Originally Posted by LOVEMYRANGIE

If you have a boostbox, the Nanocom readings aren't correct as they're being modified by the unit.
The only way you will see actual figures is from a gauge with an independent sensor at the manifold.

Andrew

Thanks for that Andrew,
Looks like I might have to install a pressure guage in the inlet manifold.

Originally Posted by Mundy

For the pedants (like me) 1 Bar = 100 kPa (= 1 hectopascal) which is approx 1 atm. So if the psi ranges you refer to are about right, then I assume its reading in kPa. If it is reading in kPa, then 82.12 kPa is 11.91psi.

Mundy

Thanks Mundy,
I think your right ... I did make a note somewhere some time back about the units used in the nanacom and now that you mention it it was kPa, not that it makes a great deal of difference in the scheme of things here. but it looks like I am pretty close to where the boost should be. ... Dave

If it's an early Nanocom1, it displays absolute pressure, not manifold pressure so you need to subtract the ambient pressure. But 200kpa is a bit low. Absolute should be up around the 230kpa somewhere or about 16-18 psi if it's not been fiddled with.
Even with a boost box, it should still stop at about 18psi.
I would be looking at the wastegate modulator if it's a D2 as it's probably stuck in a mid position and possibly check intercooler hoses for delamination as it's way too low.

I'm running 21psi at the inlet where the Egr used to be. With boost box.
Regards
Robbo

Originally Posted by LOVEMYRANGIE

If it's an early Nanocom1, it displays absolute pressure, not manifold pressure so you need to subtract the ambient pressure. But 200kpa is a bit low. Absolute should be up around the 230kpa somewhere or about 16-18 psi if it's not been fiddled with.
Even with a boost box, it should still stop at about 18psi.
I would be looking at the wastegate modulator if it's a D2 as it's probably stuck in a mid position and possibly check intercooler hoses for delamination as it's way too low.

Thanks LOVEMYRANGIE,
I have a Nanocom1 that I connect through my pc (sitting on the dash)
Wastegate modulator was replaced 12 months back, not because the old one was necessarily faulty, but because I wanted to rule it out as a cause of possible issues (not to say that the new one is not faulty... but unlikely) and I have upgraded the ECU (Tombie), the intercooler (thanks Graeme) and replaced all hoses in intercooler circuit with high quality silicon hoses (ex TD5 Alive - UK) as well as installing the boost box (TD5 Alive) ...... Dave

Originally Posted by robbotd5

I'm running 21psi at the inlet where the Egr used to be. With boost box.
Regards
Robbo

Thanks Robbo,
Sounds like you have the boost that I need to achieve but I'm a bit reluctant to do any more tweaking until I can get a boost guage installed in the inlet manifold area. From what I read it is possible to cause some serious damage if I push it too far. .... Dave