Originally Posted by
Peppy_t
My findings are the same as you have stated above Romulus..
And yes I'm encountering head lifting at the moment, except with a built engine, fire ringed gasket/block, gtx35/82, arp2000 12mm studs.. I made 450rwkw @5500rpm 21psi at around the 0.82 mark and ~22* timing, it made similar power when leaning it off (it also took more timing) but the torque wasn't there, it was good for 11.0@139 10.8@140 11.1@138 with shit 60'.. Anything over 21psi with a rich lambda (0.82) it would lift, leaning it off helped but the torque just isn't the same..
The turbo has blown so I'm getting it re-built and chucking in some ARP Custom Age 625+ studs in at the same time to see if this will help.. I'm still learning and need more Dyno time for more testing but yes it's. It's a Great fuel to work with
In saying that, a good friend has a stock motor F6 with a 6466 which made 503rwkw @27psi at a big Sydney workshop, but is now suffering from a lifted head