hey guys.
new on here, and exploring the worth of RB.
recently put an RB25DET S2 into my missus' Sil80, and having a few dramas after the swap.
firstly, the car dies at 5000rpm. feels like boost cut, and most probably is boost cut, but just getting a second opinion.
the car is running factory turbo but has had an external gate welded to the factory exhaust manifold (i know, right.).
assuming the spring in the wastegate is too big, its hitting more boost than it is capable of handling, and cutting out.
so the question is, what boost maximum can a factory motor handle? the ecu, injectors, AFM are all factory.
secondly, im having issues with rpm thru the speed range.
the car sits at 4500rpm at 100kph. and no its not the cluster, it is ACTUALLY sitting at 4500, screaming its tits off.
one would assume this would be a final drive ratio issue, but i had no problems while running an SR20, and this has an RB20 box behind it, which is more or less the same internally as an SR20 box, so it has me stumped.
last of all, this one might be a bit of a niche field for the RB powered S13 owners, but im trying to find out the best way to keep it cool?
i cant get AU falcon fans to fit between the engine and the radiator, so its got zero fan forced cooling.
only cooling mod that it has currently is an alloy radiator. which is defanitely not safe coming into summer haha.
any help or direction is appreciated!
cheers
Will.