how to tell boost pressure
06-09-2006, 03:21 PM
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how to tell boost pressure
can you tell how much boost a car is running by looking on the boost guage and reving the car up?
06-09-2006, 03:56 PM
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07-09-2006, 09:05 AM
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"Official" method.
- Accelerate up to 4th gear
- Pedal to the floor at 1500 rpm
- hit the brake at 3500 rpm, keep the throttle fully depressed though (not longer than 5 secs)
- read your gauge now
- let your brakes cool down
On my car (std actuator at the moment) it makes a huge difference, whether I'm in first, second, third or fourth gear. Don't know what it's like with an uprated actuator, though
- Accelerate up to 4th gear
- Pedal to the floor at 1500 rpm
- hit the brake at 3500 rpm, keep the throttle fully depressed though (not longer than 5 secs)
- read your gauge now
- let your brakes cool down
On my car (std actuator at the moment) it makes a huge difference, whether I'm in first, second, third or fourth gear. Don't know what it's like with an uprated actuator, though
07-09-2006, 12:08 PM
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Whats all this holding in 4th gear and putting on the brakes business??
As far as I'm aware thats a technique a tuner will use when road mapping to avoid flying down the road at 120mph whilst mapping?
Surely everyone hits full boost in all gears? What difference does it make what gear you're in
.
Just drive along....put you foot down and see what the gauge goes round to 
As far as I'm aware thats a technique a tuner will use when road mapping to avoid flying down the road at 120mph whilst mapping?
Surely everyone hits full boost in all gears? What difference does it make what gear you're in
.Just drive along....put you foot down and see what the gauge goes round to
07-09-2006, 12:17 PM
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Originally Posted by John Laverick
Surely everyone hits full boost in all gears? What difference does it make what gear you're in .
.
07-09-2006, 01:32 PM
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Originally Posted by JesseT
Originally Posted by John Laverick
Surely everyone hits full boost in all gears? What difference does it make what gear you're in .
.
07-09-2006, 03:11 PM
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Originally Posted by John Laverick
Whats all this holding in 4th gear and putting on the brakes business??
As far as I'm aware thats a technique a tuner will use when road mapping to avoid flying down the road at 120mph whilst mapping?
As far as I'm aware thats a technique a tuner will use when road mapping to avoid flying down the road at 120mph whilst mapping?
07-09-2006, 04:34 PM
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Originally Posted by PeterRST
"Official" method.
- Accelerate up to 4th gear
- Pedal to the floor at 1500 rpm
- hit the brake at 3500 rpm, keep the throttle fully depressed though (not longer than 5 secs)
- read your gauge now
- let your brakes cool down
- Accelerate up to 4th gear
- Pedal to the floor at 1500 rpm
- hit the brake at 3500 rpm, keep the throttle fully depressed though (not longer than 5 secs)
- read your gauge now
- let your brakes cool down
you wont make full boost in 1st and 2nd gear,4th is the best way to check
08-09-2006, 03:57 PM
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Originally Posted by John Laverick
Originally Posted by JesseT
Originally Posted by John Laverick
Surely everyone hits full boost in all gears? What difference does it make what gear you're in .
. 
08-09-2006, 04:10 PM
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Originally Posted by Oranoco
Originally Posted by John Laverick
Originally Posted by JesseT
Originally Posted by John Laverick
Surely everyone hits full boost in all gears? What difference does it make what gear you're in .
. 
08-09-2006, 04:11 PM
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i was also told that as you usually hold 4th gear longer it lets you see if the boost creeps up slightly higher in 4th. This is why peeps with standard ecus often hit the boost cut in 4th but not in any other gear
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