concealer404":2j2s5bbs said:
When you say "stock turbo," do you want to keep the turbo 100% stock? Or just stock fitment? Big difference.
You could hit 300awhp with a stock FRAMED turbo, but certainly not with the stock wheels.
That's my hint of the day.
Well I read this
"The gen 2 CT26 RC/CS turbo came from the factory with an uprated compressor wheel (which is larger) and it has an inconel wheel instead of the frag happy ceramic JDM standard wheels. I measured the compressor wheel as best I could, and its 46mm which is substantially larger than the stock 38mm. So max power output should be somewhere around 300hp to the wheels. We figured it would be smack between the CT20b and the JDM ct26. Think of it like a supra ct26 but with a twin entry exhaust housing. Its got the same specifications"
So from what I gather (I'm new to boost) is that the RC has a different exhaust-side wheel, but the same intake side wheel as a regular GTFour? In which case I wouldn't mind *too* much changing the intake wheel (if that would even help), but I'd prefer to keep the turbo as stock as possible.
Flying Bajan":2j2s5bbs said:
Fuel pump upgrade is always a good idea as might a set of slightly larger injectors and a bored out fuel rail &.
Cams and gears will not help a whole lot on a stock CT26. But do on the top end (at the expense of some low end) with a CT27. My car had in HKS 264's when I got it with a CT27 and it really came alive with the GT2871 I later installed... With the CT26 or 27, some stock gen III cams might be a useful upgrade that matches the power curve well with that level of mods. Bolting on a CT20 from an ST205 would be a good upgrade too methinks.
Good point on the cams, I wasn't even thinking of stock cams from another motor/gen :crazy: . I'll start looking into the Gen III cams vs Gen II, any others I should look at? I'd rather have low end than top end, 40 km/h over the limit gets your car impounded for a week around here, but we have tonnes of twisty back roads :wink:
As far as the fuel rail, I assume boring it out is better for me vs an oversize rail as the sizes in production are already too big of a jump from stock for what I'm doing (same for the cams?)? What would be considered slightly larger injectors? Stock is 440 if I'm not mistaken, so something like a 500? (if that even exists). I'm guessing yet again something that was stock in another car would be best?
Hotrodhendrix":2j2s5bbs said:
ST205 had a slightly larger W/A core if need be. You could always build a "ct27" out of your stocker like ATS does. Still a "stock" like turbo but should get you much closer to where you want to be. Not to mention it wont fall on its face at higher rpm like the stocker does.
~James
How do I tell if I need a bigger core? Intercooler water and intake air temps getting too high? What exactly is a CT27? Same as above, I want to keep the RC-specific parts of my turbo but Im semi-open to changing the parts that are the same as the regular GTFour.