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Aluminium corrodes, it turns into a light grey powdery, sometimes flakey material. As opposed to the typical brown rust on ferrous metals.

I dont actually mind being limited to 180... I mean when can u legitimatly and safely go that fast anyway? Its the sound, feel and thrill of getting from whatever, to the limit, very... very quickly... ok, maybe just a few k over the limit. : ) Just wanted to be sure it was a normal thing, so, thanks guys..

Ive had my Skyline for 2 weeks now.. Geez I love it. :hearts: A mate has a VX SS.. I been boasting how my GTS would smoke him, just quietly though, I was a little concerned that it wouldn't work out that way :Oops: Well.. I just fed that SS to my 'line such a glorious site, race to 100 klm/hr: SS 2 car lengths behind when I hit the mark... sweeet. Now what i wanna know is this, does the R33 gtst have a speed limiter that comes on somewhere around 5500 rpm 5th gear? Dont know what the speed is... whatever it is it is above the 180 mark on the speedo, gotta change that thing. Cant be a rev limiter cos it winds out to redline in all other gears, but in 5th she hits some sort of power cut for a coupla seconds then re accelerates to the same point?? Any clues? Found this out on an unused airstrip btw

So what is needed to run boost up to 15psi?. I understand that the weak points of the rb25 at high boost levels are the pistons, head geasket and intercooler. I have a dual stage boost controller and the second stage is not yet dialed in. 1st stage is set to 9psi and have been told to go ahead and set 2nd stage to 15psi. The engine was rebuilt recently with (among other things) forged pistons, thick steel headgasket and has a large intercooler. Is 15psi reasonable?