Standard boost-what is it?

[DVR]

I've searched and can't find what the original factory boost pressure is. Also is there a difference between auto and manual maximum boost, since the manuals are supposed to be 15 or 20 more BHP?

 

[pu-11-me]

You will find it is somewhere between 6 and 8PSI in all models

 

[bradc]

My facelift auto had 10psi from factory Unsure why though!

 

[pu-11-me]

My facelift auto had 10psi from factory Unsure why though!

*coughs*

/freak car

 

[CANDEE]

My leggie had about 8psi, and my galant has 11.25psi std.

 

[bradc]

With an exhaust mine was about 10.5psi. I think it is more like:

191kw = 7psi
206kw = 9-10psi

 

[Guest]

about 8psi i believe

 

[Guest]

Does this mean that there is no Mechanical difference between say a Series 1 & 2 Engines apart from more factory boost?

 

[bradc]

Most facelifts have a larger throttle body which is 64mm in size compared to 60mm. These engines also have a larger inlet into the intake manifold and the individual runners are a bit bigger. The difference is minimal though, it is as if Mitsi just ported the intake runners.

 

[Guest]

6-7psi if you disconnect the factory wastegate solenoid when connected about 8-9psi but with a better feeling spool.

 

[Donkay]

Also, question, i notice people boost their turbos to 15psi, does it Actually stay at 15 or spike up to 15 and gradually drop to 10ish like what mine is doing.. Keeping in mind im using an ebc unless its the ebc to blame im assuming

Also i have removed the solenoid as well

 

[Donkay]

Also, question, i notice people boost their turbos to 15psi, does it Actually stay at 15 or spike up to 15 and gradually drop to 10ish like what mine is doing.. Keeping in mind im using an ebc unless its the ebc to blame im assuming

Also i have removed the solenoid as well

 

[bradc]

They will all drop towards the redline as the turbos are pretty small and at high rpm's they struggle to hold the boost.

 

[king_panther]

My facelift auto had 10psi from factory Unsure why though!

You........................ had an auto? *gasps*

@Donkay, PFL Autos had 191kw, PFL Manuals/FL Autos/FL Manuals had 206kw. 260vs280HP. Most posts here indicate just a single PSI of boost difference?

 

[steveP]

From factory mine was 8psi, which is pretty common for most factory turbo cars.

Removing the boost restrictor will give u another pound.

Upgrading dump/front pipes will get it to 10-11psi with no boost controller.

 

[Hotwire]

From factory mine was 8psi, which is pretty common for most factory turbo cars.

Removing the boost restrictor will give u another pound.

Upgrading dump/front pipes will get it to 10-11psi with no boost controller.

Not entirely true - my car (as I have found out) has front pipes, 3" exhaust and disabled boost control at the moment (as my EBC is not functioning) and I only hit 7psi - wastegate spring pressure. Thats it.
However, I do also have compliance cat - which may go walkabout soon....

 

[Guest]

my old FL (auto) legnum was bog stock apart from a cat back and that was running 10psi...

 

[Tom]

Stock was 8psi on the boost gauge.. Then once I had a boost controller, engine pipe, exhaust and front mount, I was able to run about 11psi safely, 12psi on most occasions (but get a drop in temperature outside and it'll spike to about 14 and hit cut)

 

[steveP]

Not entirely true - my car (as I have found out) has front pipes, 3" exhaust and disabled boost control at the moment (as my EBC is not functioning) and I only hit 7psi - wastegate spring pressure. Thats it.
However, I do also have compliance cat - which may go walkabout soon....

That doesnt sound right. Maybe something went wrong when the EBC was disconnected.

 

[Hotwire]

Yep you're right that something is wrong.
I have a feeling the stock solenoid has been removed from the picture and thats why without the EBC functioning i've got waste gate pressure only. I haven't had time to do anything about it since picking the car up on Monday, but hopefully this weekend will get the EBC functioning again.