djtimodj

Guys, Im having some boost issues at the moment. Here in the UK were having some nice weather for a change and this is effecting my boost pressure.

When the car was being used in the winter (0-5/6 degrees C) I was making 0.9-0.95 bar boost. Now the weather is warmer 20 degress C ish Im only seing 0.75-0.8 bar!

I have a EBC but this is maxed out all the time due to the soft stock APS actuators springs. Does this amount of boost drop sound like weather changes or a small boost leak? Im thinking just the weather but I just wanted know what you lot think?

Im having stiff actuators springs fitted this year, this should allow the EBC to control boost and not just be maxed out all the time.

Thanks.

wannabuy350z

iTrader: (27)

colder weather= denser air

its typical to drop a bit

djtimodj

LOL yeah I know that! lol...but to drop 0.1-0.15 bar is quite alot I thought!

tylerxfire

iTrader: (15)

id say a boost leak..shouldnt drop that much imo..

thom000001

Weren't you having a smoking issue a few days back too?

Tom

djtimodj

Yeah.... :-(

DaveJackson

iTrader: (5)

Yep, something else is wrong. If I remember the Ideal Gas Law equations, (but I am having a rough day with the ol' brain box), your temp has changed by about 7% while your pressure has changed by over 16%. That doesn't sound right, to me.
By the way... When did you ******* in the UK finally start using the metric system?! LoL!

binder

iTrader: (8)

something is wrong

that's a false myth because when you first turn it on the car will register 0 psi at whatever barometric pressure it is. It references it based off that so there isn't going to be that much (if any) difference.

So if you had a static barometric baseline set in your setup then yes, there would be a difference in absolute pressure but since the baseline starts off at 0 when you turn the gauge on there won't be that problem. It's measuring atomospheric pressure so static pressure is at 0 then it measures boost above the atomospheric pressure around you, not a static barometric pressure you have manually entered.

That's why in our airplanes we have to manually adjust the barometric pressure. It reads the pressure off of what we set it. So ours if not set correctly will be off greatly.