Has anyone tried playing around with the wastegate on the Turbo - R cars.
I know that on some cars (Toyota supra for example), simply shimming the wastegate with about three washers raises pressure about 4 PSI - and makes a lovely difference - with no adverse problems.
The car pulls quite well but it always feels as though the turbo is holding back a great deal more than it could. I am sure a blown V8 ought to be able to get a tiny bit more of a wiggle on.
Anyone either managed to shim / bleed the system to get a little extra bost - and if so, what is generally regarded as a "fairly safe" increase to aim for. I have no problem in feeding her 100 PN fuel - a mixture of Tesco's 99 (actually 98.5) and toluene, so I am not too concerned about knock.
Be great to hear from someone who has done this. If it makes a difference, mine is the oldest of the turbo R's - carb job - and this is partly what makes me think there might be some room to play - as essentially the same block ended up SUBSTATIALLY more power on the later models, once better tyres became available.
I am not worried about the speed cut-off - I am not really after the top end, more interested in the acceleration performance.
Mark
I know that on some cars (Toyota supra for example), simply shimming the wastegate with about three washers raises pressure about 4 PSI - and makes a lovely difference - with no adverse problems.
The car pulls quite well but it always feels as though the turbo is holding back a great deal more than it could. I am sure a blown V8 ought to be able to get a tiny bit more of a wiggle on.
Anyone either managed to shim / bleed the system to get a little extra bost - and if so, what is generally regarded as a "fairly safe" increase to aim for. I have no problem in feeding her 100 PN fuel - a mixture of Tesco's 99 (actually 98.5) and toluene, so I am not too concerned about knock.
Be great to hear from someone who has done this. If it makes a difference, mine is the oldest of the turbo R's - carb job - and this is partly what makes me think there might be some room to play - as essentially the same block ended up SUBSTATIALLY more power on the later models, once better tyres became available.
I am not worried about the speed cut-off - I am not really after the top end, more interested in the acceleration performance.
Mark