boost guage

[adam 32]

i still think despite the age of your car, if the actuator line is in good condition and is getting an accurate pressure reading then boost pressure will always be constant

zanda no i wouldnt stress. youve always got the boost cut at around 12psi (i think) which would prevent and mecanical damage

[zanda]

adam,

I have heard of the turbine wheels becoming rounded over years of wear as a result of HKS pods (see: alex's shit filter)

[caminperth]

zanda/paul - that guage has been checked against a dyno.. it is accurate..

[GTS-t VSPEC]

Hmm, seems low, but nothing to stress about. Just gives Alex another excuse why he can't keep up:D

[G0DF4Th3R]

whut gauge is this? i want one

[ImPrOvIsE]

Just with the standard guage it is now reaching 5-6 mmhg when before exhaust it only used to reach 3.5 mmhg. This converts to about 10psi which is a bloody great improvement. A boost increase of 3psi. Happy-yes I am.

[zanda]

Originally posted by GTS-t VSPEC

Hmm, seems low, but nothing to stress about. Just gives Alex another excuse why he can't keep up:D

I dont need excuses.

There are good REASONS not to drive too close to you, crazy man!

:crazy:

[caminperth]

zanda - he gives me good reasons to spend bulk coin on mine to be able to get away from him.. I'm sick of having his paint on my rear bumper..

[caminperth]

improvise - good to hear the mods made a difference.. still interested to know what the boost is when you wack an accurate guage on it...

[G0DF4Th3R]

still doesnt answer my question on what gauge it is

[adam 32]

vdo guage and no leaks.. me thinks that the improvement made on zanda's car is a bit more than just an extra psi (his is set to 10)...  

looks like a VDO guage - if so you dont want one!

[ImPrOvIsE]

caminperth.....boost reached a maximium of 9.2 PSI on dyno

[zanda]

so then why would my car have had suck a low standard boost level?

[caminperth]

me thinks alex meant to say "stuck at low standard boost level"

improvise - suprising results.. and that was just running the acutator? all good..

[ImPrOvIsE]

why is this surprising Caminperth?

[zanda]

such

[caminperth]

hmm.. Suprising because of the mechanical nature of the actuator.

It is my understanding that the mechanical actuator measures the boost level on the compressor side of the turbo and when this level gets to a certain pre-determined point (ie 6 to 7psi for an R33) it then "actuates" or opens the wastegate to keep the boost at that level.

If this is correct, then I fail to see how making the flow in and out (inlet and exhaust) of the turbo will in any way change how this mechanical actuator works. It will still open the wastegate as soon as it sees the set boost level.

The only way I can think that it could possibly produce more boost is if the increase in flow through the turbo is greater than what the wastegate can deal with. Therefore the wastegate is at maximum flow and still more air is flowing due to the increase in size/flow of the inlet and exhaust (predominately the exhaust), producing more boost.

I did not think that the maximum wastegate flow would be so low as to let this happen. I was obviously wrong. Hence I find it suprising.

Always good to find out new stuff.