Post by
LuckyX2 »
https://forums.nicoclub.com/luckyx2-u135781.html
Mon Jun 08, 2009 2:53 pm
Hey guys I'm so glad to finally be a 240sx owner; I've always liked them since well before I could drive and now I'm almost 19 and finally have one.
I picked up a 1989 pignose hatch with an sr20det with only 30-40k miles (103k on chassis) and quite a lot of mods including: greddy fmic, godspeed coilovers, vlsd, gt28r turbo, apexi safcII which was tuned and dynoed at 250whp, walbro 255lph, q45 front brakes, new headgasket, arp studs, polished ebay intake manifold, 550cc nismo injectors, apexi intake, full 3" exhaust, greddy type rs bov, act 6 puck clutch and an extra set of 18" wheels all for $3500!
Why so cheap? Well, the engine head was disassembled due to a bent valve and is still in pieces. I went out to check it, the bend was minor and the piston which hit it was clean and mark free. Aside from a scratch on the cam lobe, the internals looked perfect and I decided to buy it. I was planning on doing a rebuild anyway so this is helpful that it's already apart.
So enough of the history on this; what am I doing now? Well now that the engine is in pieces I might as well build it, right? I don't really have high hp goals (300-350whp) but I would still love to build this engine both for the satisfaction of building it and also to wind up with something overkill in the durability department.
I've been throwing around a couple build ideas and here's what I've gotten it down to:- 9:1 compression forged pistons with forged rods- supertech dual valve springs with ti retainers- tomei solid lifters- gt2871r .64- hks step 2 256/264 cams and adjustable gears (considered 264/264 but I am more concerned with low-mid power)- balanced crank (still iffy on how necessary this is)- P&P'ed head- aem ems and hours of personal tuning time to tie it all together
I think what I'd get flamed for most on this build plan would be...1.) The increased compression I would like to go with a bit more compression to squeeze some extra torque out and get that gt2871r spooling quickly but I imagine many would deem it unnecessary and suggest I rather go for a higher boost stock comp build. pros/cons on this?2.) the gt2871r .64 is overkill for 300-350whp especially when the compression is also higher and that a gt28rs would be better suited. To this I say that the gt2871r is a more efficient turbo with its redesigned compressor wheel and 71 trim. Also I am planning on making this motor capable of some high revving and I don't want the turbo to fall flat on its face when I get there. IMO the gt2871r would produce more area under the power curve and usable power with 256/264 cams than the gt28rs would with the same cams at the same boost (10-15psi)
Oh and this car will be street driven mostly but, tracked, dragged and drifted occasionally.
Well I guess that's all for my long winded post. What do you think? Any comments/ constructive criticism?