Diesel-like build.

[Thradya]

Hi, I'm a little crazy. I want to spend money on an engine and I don't want any more HP. Crazy, right?
What I do want however, is majority of the torque available in the 2000-5000rpm range, and maximum HP (170-180HP on the flywheel is enough) around 6000rpm.
Starting point is a stock CA18DET. Fire away your imagination - what would be the recipe for success?

[meminto]

I am guessing you are thinking about pressure compounded turbo charging?

[float_6969]

Supercharger? I'm sorry, but the CA is NOT the motor to start with to get low end out of.

[blownhemi]

Swapping in a KA is a good starting point. Also a good finishing point, since what your describing *IS* the KA. HP peaks at 6000, with some minor mods you'll have the 170 HP at the flywheel, and there's 170 ftlbs of torque flat from 2000-5000 in stock form.

The CA is a square engine (bore=stroke). Square engines are not easy to get torque out of. It can be done, but it's expensive and pointless, really. It's like trying to make a truck diesel redline at 8000.

[D_Stirls]

Meminto beat me to what i was thinking. 50+psi through compound turboing. you need a small turbo for you primary turbo, something like a GT2554R and something large like a GT3071R as the secondary, but you'll make more than 200hp.

[Thradya]

Meminto beat me to what i was thinking. 50+psi through compound turboing. you need a small turbo for you primary turbo, something like a GT2554R and something large like a GT3071R as the secondary, but you'll make more than 200hp.

So GT2554R alone should solve my problem, right? From what I'm reading it's more than capable of doing 200HP, and I'cant really imagine how GT3071R installed behind it could help with anything under 4000rpm.

[blownhemi]

Meminto beat me to what i was thinking. 50+psi through compound turboing. you need a small turbo for you primary turbo, something like a GT2554R and something large like a GT3071R as the secondary, but you'll make more than 200hp.

So GT2554R alone should solve my problem, right? From what I'm reading it's more than capable of doing 200HP, and I'cant really imagine how GT3071R installed behind it could help with anything under 4000rpm.

Read through this: http://www.ka-t.org/forums/viewtopic.php?t=7446
For your goals, and if you want something really different, this would be the way to go. To use two different sized turbos, I think, this is the ONLY way to go. I myself am toying with this thought also, sometime in the future. But for the small turbo, I'd take a really small turbo, off a small turbodiesel grocery getter, like a GT17 or a GT20, or similar, I don't know what you can find around where you live. Would be cheap, too. Anything brand-new and/or ball-bearing for this application would be an overkill.

[meminto]

Blownhemi is on the money, the design if the system is overkill for what you want to do..

Dual turbo compounding is a very interesting alternative if your goal is the other end of the scale...

[Sil240]

If I were you I would look into a CA20 Crank.
Don't know anything about CA's but if the CA20 has more Stroke then the increase in stroke will give you a better mechanical advantage.

That and a small turbo would be killer

Also if you look at WRC cars they make 300 HP but something like 400 ft/lbs of torque
They used restrictor plates and variable boost controllers

[blownhemi]

If I were you I would look into a CA20 Crank.
Don't know anything about CA's but if the CA20 has more Stroke then the increase in stroke will give you a better mechanical advantage.

That and a small turbo would be killer

Also if you look at WRC cars they make 300 HP but something like 400 ft/lbs of torque
They used restrictor plates and variable boost controllers

Not to mention they use insane amounts of ALS, that's why they have 300 BHP flat on tap all the time.

Unfortunately the CA20 crank does not work in the CA18DET: partsca18-to-ca20-t389078.html

[Thradya]

CA20 is not available around here. Compound turbo, after some reading, seems to make sense in big turbo applications - i.e. small turbo is helping the big one, not the other way around.

Let's assume that single, small turbo is the way to go - are there alternatives to GT2554R that would suit my goals and not require new headers?
Engine will be running on MS/VEMS. What other stuff need to be changed? I'm completely new to CA18 and have no idea about it weak design points.

[blownhemi]

CA20 is not available around here. Compound turbo, after some reading, seems to make sense in big turbo applications - i.e. small turbo is helping the big one, not the other way around.

Let's assume that single, small turbo is the way to go - are there alternatives to GT2554R that would suit my goals and not require new headers?
Engine will be running on MS/VEMS. What other stuff need to be changed? I'm completely new to CA18 and have no idea about it weak design points.

The GT25R is basically the stock replacement, so you would get stock spool, power and torque (or lack thereof, more accurately). Maybe slightly better spool, because of the ball bearing. Which is still nothing like what you've outlined in your original post. For your original goals, it's really better to start with a KA (maybe build the high compression engine), this engine just isn't fit for that.

[sjbsuperman1425]

High Compression KA for drifting = WIN