hi
Great day, all went well & Mark played mega safe almost 10deg less ignition this time, we reached the limit of the ports/ex cam much as Mark
predicted & it was over 800bhp @ 6k & still over @ 8K . Peaked at 838.4 @ 7.5k it was out of puff.
The smaller turbo was still making power at 7.5k.
The big beastie was supplied with a full race exhaust housing that proved to be too tall & the turbo hit the head so game over.
600ft/lb from 4850 to 7350 should prove interesting.
Im calling it quits at this point, ive done my bit, but an easy 900bhp in there with larger ports & a different exhaust cam.
Will try the new turbo on the rolling road should spool quicker but it looks like the limit on 109 & conservative ignition.
Cheers Rod
ned