Ive got a Vauxhall Astra Coupe Turbo with the phase 3.5 from Regal , i been told this should produce 290ish BHP , the previous owner told me he got it rolling roaded at 266BHP with 312lb of torque with a dead turbo , the previous owner fitted an Astra VXR Turbo with uprated internals.
I got it on the rolling road today at JamSport and i was shocked to say the least when the results were 250BHP @ 5100rpm and 295lb of torque at 3000rpm
What can be wrong ??
Been told next time to remove the traction control fuse as that will make a big difference , is this true ??
Im really baffled and gutted about this so any help will be much appreciated