2fcknfst

Still thinking about how I'm going to approach this; current thinking is to send the K24s to Marski, then consider doing more to the motor.

First world problems.

Congrats on your order, should be fun.

LinwoodM

Yes, I am debating on how much to sell my hybrd k24s for when I do this swap...

2fcknfst

When I look at the supporting work you (anyone) are (is) doing, really makes me think about patience, and building a motor.

Curious as to what the hybrids will be worth.

T10Chris

I would just run the XRs on stock motor at a lower power level and not mess with the hybrids. Even the 980s will be more efficient/less stress (make same power with less boost) than hybrid K24s, less expensive since you already have the XRs, same amount of work to install either way, probably get decent money for OEM K24s too if you wanted to sell them.

kamlung

did someone say billet k24s???

Asmig

Hows the spool of the 980 compared to the typical hybrid choices?

2fcknfst

The thing is that, when I factor in running a new fuel line, running coolant taps, etc., and only to run low-ish power, I cannot help but wonder how fantastic these would be with some billet rods and enlarged displacement, thus why I thought about simply fixing the leaky K24...

kamlung

slippery slope... the rabbit hole is deep... the question is, are your pockets deeper...

2fcknfst

It most certainly is a slippery slope... that is why I haven't dove in. Yet.

Plus, oil and gas really isn't doing well up here at the moment, so there's always that.

Bernard IV

I think you'd be happy with the billet k24s for the money invested. You just need to get to 1.3 bar of boost and you are flying.

LinwoodM

I did. They will be available this winter…

kamlung

i have collected a pair of k16 billets and xr770s but have yet decided which ones to install on the car. i like the billet option since it's plug and play and i feel like i won't be using the xona's to their fullest potential... i have the Andrew problem of how deep down the rabbit hole i go.

powdrhound

K16billets or the XR770s will be far harder on a stock motor than the XR980 or 1000s. Plus their performance sux in comparison with a bunch of grunt down low and not much on top. You can run the 1000s on a stock engine no problem with just a fuel pump, injectors, and an intake upgrade along with an exhaust. Pretty basic mods really to get an easy 650whp on pump at 1.3 bar with an easy low 500s ft.lbs.

2fcknfst

Pulling the front diff has really changed the way I look at, and experience, the driving characteristics of the car. I am finding that, with the car sorted to about 90%, solid tune, fancy gearing, I do not really need a lot more power down low - I can break the back free with ease now, so to me, that means I cannot really optimize the power that is currently on tap with this setup.

Where I do think it is lacking is at highway speeds in sixth gear. Yes, it will pull given time, but I find that a quick downshift to fifth makes everything better. I think another 30 - 50hp available at 3k rpm would solve this issue. Building a 4l motor will move the torque curve down, and make it more tractable around town, but the current K24s spool so quickly, I cannot help but wonder how much better they would be opened up a little bit more. As Kam noted, the rabbit hole is deep and dark, so this would be a 'budget friendly' exercise that may prove to be a good fit for the OEM motor.

powdrhound

The 980s will spool marginally faster (maybe 200 rpm) compared to the 1000s which will have a slight edge on the top end. Spool is very linear on both the 980s and 1000s. They are basically identical turbos with the 1000 having a 6mm larger turbine. Tial only makes the 1000s now so it's a moot point to compare. The 1000s are unequivocally the best direct bolt on turbochargers on the market for these cars. You simply can't compare them in any form to K24 billets.