Boost hunts in 4th and 5th
28 December 2004, 12:06 AM
#1
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Boost hunts in 4th and 5th
On WOT max revs in 3rd, change to 4th back on WOT, boost hunts between 22psi and 16psi....ish, for about 4-5 seconds before settling at 20psi. Does the same in fifth. If I back off slightly it settles.
Have a feeling I may need a boost controller, but would like some input as to what others think.
Spec is-:
MY96
Rebuilt TD05 with garrett bairings (sp?)
Full de-cat
Up pipe
Gruppe-S un-equal headers
Link ecu (mapped by pat)
480cc injectors
uprated fuel pump
Pace front mount intercooler (V4 modified to fit)
Cosworth 3-bar map sensor
6.8kg billet flywheel
5 leaf paddle clutch
Lightened pulleys
Pipercross induction kit
VTA dump valve
There may be a couple of things I have missed. I was under the impression that the Link should be able to manage?. It was mapped to 1.25bar, although Pat did say that there was a discrepancy between that and the boost gauge.
Have a feeling I may need a boost controller, but would like some input as to what others think.
Spec is-:
MY96
Rebuilt TD05 with garrett bairings (sp?)
Full de-cat
Up pipe
Gruppe-S un-equal headers
Link ecu (mapped by pat)
480cc injectors
uprated fuel pump
Pace front mount intercooler (V4 modified to fit)
Cosworth 3-bar map sensor
6.8kg billet flywheel
5 leaf paddle clutch
Lightened pulleys
Pipercross induction kit
VTA dump valve
There may be a couple of things I have missed. I was under the impression that the Link should be able to manage?. It was mapped to 1.25bar, although Pat did say that there was a discrepancy between that and the boost gauge.
29 December 2004, 01:08 PM
#6
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Sounds like you have an overboosting problem (the car hits the ecu set boost limit which cuts the boost until it drops down to a safe limit), possably due to your mods.
You need a boost controller (like you said) or the map just tuning down a little, its probably due to the cold weather, i take it you had the map done in summer?
Tony
You need a boost controller (like you said) or the map just tuning down a little, its probably due to the cold weather, i take it you had the map done in summer?
Tony
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