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.

Does the car pulsate whilst doing so?
Ie feels a bit on/off/on/off the power?

Tony:)

Yes, thats it exactly Tony

BTTT

BTTT

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:D

It was mapped at the end Aug begining of Sep, and was nowhere near as cold as it is now.

Thanks for the reply Tony :)