Quote:
Originally Posted by vq35SMASH
so heres the deal, im on track for a decent power upgrade to my BONE STOCK BLACK TOP sr. so far ive got a s15 t28, dwerks 550's, Z32 MAF, HKS wastegate. on the way for the rest is a enthalpy tune, tomei procams, turbo SS lines, and a new exhaust manifold since im already there. and my question is this, my friends love the phrase "since your already there might as well...blah blah" and i have a old head off my old RED TOP sr thats been laying around for quite sometime. would it be benificial for me to p&p and do new springs seals and the whole laundry list of possibilities to the head and just put that on when i put the rest of the crap on? if so what would be the best course of action of stock stuff to leave and aftermarket stuff to upgrade too, and cane even a REDTOP head work on a BLACKTOP lower for a s13??
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I can tell you this about the motor and making power. Get a real ems that you can re-tune. Enthalpy will do for now but you'll want this later trust me. Love Enthalpy but he'd tell you he same thing, he told me that years ago and actually pushed me to be where I am today (I'm talking 2002).
5 angle valve job, deshroud the valves, gotta go to a guy who knows his shit seriously though to do that right, polishing and port matching is more importing than porting the shit out of an SR, the benefits are nil on just the porting end, slight porting and lots of polishing is what you want to do and it will help. We had an SR recently on the dyno we did, 12 psi of boost, 2871R .86 housing, stock intake manifold, 740cc injectors, AEM EMS - we pumped out 355 whp on a dyno dynamics....polished, very slight port and port match with BC 264 cams. Literally weren't even in the efficiency range at 12 psi on the turbo yet and we were already pumping out 355 on a Dyno Dynamics dyno (which if you don't know are the lowest reading in the industry) so we were very close to 400 whp on a dynojet basically. A lot of it was my tuning but the head work definitely helped a lot. So might be a good idea but make sure the guy knows what he's doing with the head that's critical.
If you don't have someone local you can ship it out to Cali and I can have it done by one of the best head guys in the world...he started portflow now he does his own stuff out of the south bay in a tiny little shop making Volvo motors pump out 1000 hp just for fun...don't ask lol
Might as well wait if you're going to do head work then throw the cams in then. But you're going to want an adjustable EMS because the head is going to throw stuff off, the cams will throw stuff off so just make sure Enthalpy can retweak it for you after the head work. You're AFRs are going to be off etc etc.
Hope this helps.