How much boost do you run..?

JT · Wednesday 14th September 2011, 17:22

1.3 bar
as per the PR8 racing regulations

**claymore** · Wednesday 14th September 2011, 17:27

26psi at prescott a couple of weeks ago, but turned back down to 20psi now

**Volvostorm** · Wednesday 14th September 2011, 21:11

No idea yet, but I know it can run upto 2bar (29psi) without stress, possible even 2.2bar

**Ade** · Thursday 15th September 2011, 00:39

A Rica mapped ECU which sent it to the top of the gauge on the dash!

Whatever that is?
Just on a standard turbo and a Bailey DV26, (which I'll be chucking soon probably!).

**gmain1967** · Thursday 15th September 2011, 18:20

18 psi on a T4. But that is with a 19T.......

**t5_monkey** · Thursday 15th September 2011, 19:12

Wish I had a 1.6 Drive... S40.. then I could say 36 PSI

Originally Posted by gmain1967

18 psi on a T4. But that is with a 19T.......

Yeah but that's like 180psi on the regular turbo

There's a pistonheads run this Sunday fancy embarassing a few porsches ?

**gmain1967** · Thursday 15th September 2011, 19:17

Originally Posted by t5_monkey

Wish I had a 1.6 Drive... S40.. then I could say 36 PSI

Yeah but that's like 180psi on the regular turbo

There's a pistonheads run this Sunday fancy embarassing a few porsches ?

LOL - nice idea but too much on this weekend and back to work Monday after two weeks off. Been anything but a holiday

**danny-R** · Thursday 15th September 2011, 20:39

1.5 bar with dv before it ££££ itself lol

**theflyingbrick** · Sunday 18th September 2011, 17:37

peaks at 20 psi but drops right down to about 13 saying that the clutch started slipping quite a bit so when thats fixed if it still does it ill investigate the actuator!!

**merc85** · Sunday 18th September 2011, 18:16

Sounds like a Boost leak somewhere, Keep us posted.

I take it your runing a blanking plate with ur dv.

Full stage zero tune is a must, helps in the long run.

**8501970** · Sunday 18th September 2011, 21:05

Originally Posted by pault5estate

no idea yet, but i know it can run upto 2bar (29psi) without stress, possible even 2.2bar

2.2 bar !!!!!!!!!!!!!

**theflyingbrick** · Sunday 18th September 2011, 22:11

Originally Posted by merc85

Sounds like a Boost leak somewhere, Keep us posted.

I take it your runing a blanking plate with ur dv.

Full stage zero tune is a must, helps in the long run.

yeah mate blanking plate and dv i think its the clutch where the engine was just revving and not revolving is why it dropped so much but we will see

**frobes2** · Monday 19th September 2011, 09:42

1.2 bar with a Forge blanking plate and no dump valve.

Scott..

**swedenpower** · Thursday 22nd September 2011, 14:40

14 psi with Standard recirc

**smithy** · Thursday 22nd September 2011, 16:45

Originally Posted by 8501970

2.2 bar !!!!!!!!!!!!!

2.2 bar thats childs play mine is rated at pushing 2.5 bar scary lol

**merc85** · Friday 23rd September 2011, 00:06

These Boost figures is it the maximum the car wll run all day long or just a quick burst?

Tyring to find out weather ive a problem or not.

I can boost 20psi but after sustained 15sec's she drops to 15psi? i am running a auto ecu in a manual, could this be the problem?

**glock19** · Friday 23rd September 2011, 00:12

Originally Posted by merc85

Tyring to find out weather ive a problem or not.

I can boost 20psi but after sustained 15sec's she drops to 15psi? i am running a auto ecu in a manual, could this be the problem?

On 5th gear for 15 Secs ?
The Auto ECU is not the culprit, it could be the mapping where the load indeces is lower and thus lower boost. If this has never happended before, check your MAF sensor

**jardon** · Friday 23rd September 2011, 08:10

Originally Posted by merc85

These Boost figures is it the maximum the car wll run all day long or just a quick burst?

Tyring to find out weather ive a problem or not.

I can boost 20psi but after sustained 15sec's she drops to 15psi? i am running a auto ecu in a manual, could this be the problem?

Stock frame turbos will support ~1.0 bar above 6000rpm. If you are running 20 psi peak and it drops off at ~5000rpm then this is because the turbo is out of puff. You could nail the wastegate shut and it would still fade. My stage 1 tunes on the 16t all ran peak 18-19 psi but dropped off to 12 psi at 7000 rpm. My 19t runs a peak of 1.4 bar and drops to just over a bar at 7500 rpm. This may explain what you are seeing on the gauge - could you do a 4th gear pull from 2000 rpm (or whatever is deemed safe for you rods) to 6000 rpm and get back to us with your boost at 1000 rpm intervals?

**merc85** · Friday 23rd September 2011, 13:30

I'm beging to think it's my 15g turbo runing out of puff. If it was a Boost leak it would imediatly drop dont you think,

At the moment she will hold a 18psi until around 4,300 rpm then the boost tails off to a 1 Bar aprox 14.8psi

I Will try and do a run with a friend so he can look at the gauges.

Thanks again for your sugestions