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44 Posts
Hi guys,
I have a thread going on the SXOC but as it's an RB related problem I thought I would post here too.
Had the car on the rollers last Saturday and it wasn't making quite the power I'd hoped for. All is healthy, and it was soon spotted that the boost is trailing off as the revs climb. Initially hits the 0.8 Bar it's set to, then trails off down to 0.5. Just refuses to hold the boost.
My spec is as follows:
Internally stock RB25
Hybrid T3 from 4x4 Cossie (360 thrust bearing and built to cope with 22PSI, has only covered about 2500 miles)
Forge motorsport adj actuator
Dawes device mechanical boost controller
Standard Recirc DV
FMIC
Apexi filter
3" turbo back Exhaust system
Power FC
From asking on the SXOC the actuator should be fine, as the previous owner of the actuator had the diaphragm replaced and the previous owner of my car fitted a stiffer spring to it to try and cure this boost dropping problem.
He has also confirmed that it did this PRIOR to the dawes device being fitted. This was my number one suspect after the actuator, but appears this may no longer be the case.
I don't believe it's a boost leak, as the car isn't running rich at all and there aren't any of the running problems I'd assiociate with such a leak, unless it's very very small or only occurs under pressure (recirc leaking perhaps?).
Basically wondering if anyone on here has had anything similar, and if so what did you do to cure it?
Any ideas or suggestions welcome.
Thanks all
Del
I have a thread going on the SXOC but as it's an RB related problem I thought I would post here too.
Had the car on the rollers last Saturday and it wasn't making quite the power I'd hoped for. All is healthy, and it was soon spotted that the boost is trailing off as the revs climb. Initially hits the 0.8 Bar it's set to, then trails off down to 0.5. Just refuses to hold the boost.
My spec is as follows:
Internally stock RB25
Hybrid T3 from 4x4 Cossie (360 thrust bearing and built to cope with 22PSI, has only covered about 2500 miles)
Forge motorsport adj actuator
Dawes device mechanical boost controller
Standard Recirc DV
FMIC
Apexi filter
3" turbo back Exhaust system
Power FC
From asking on the SXOC the actuator should be fine, as the previous owner of the actuator had the diaphragm replaced and the previous owner of my car fitted a stiffer spring to it to try and cure this boost dropping problem.
He has also confirmed that it did this PRIOR to the dawes device being fitted. This was my number one suspect after the actuator, but appears this may no longer be the case.
I don't believe it's a boost leak, as the car isn't running rich at all and there aren't any of the running problems I'd assiociate with such a leak, unless it's very very small or only occurs under pressure (recirc leaking perhaps?).
Basically wondering if anyone on here has had anything similar, and if so what did you do to cure it?
Any ideas or suggestions welcome.
Thanks all
Del