supercharger or turbo

Information on the naturally-aspirated KA24E and KA24DE engines.
cojoe240
Posts: 18
Joined: Mon Oct 25, 2004 9:04 am
Car: NA 1990 240sx / Turbo KA 1992 240sx

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I have a 92 and have been saving for a while and want to know what would be better? I hear that with a supercharger you have better acceleration and no lag like a big turbo. But is it just as good top end?


iheartu
Posts: 52
Joined: Tue Oct 10, 2006 2:57 pm

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A supercharger will provide the best throttle response and the turbo will help create maximum horsepower. Also superchargers are kinda up in price. You could find good cheap used parts to turbo you car or a complete turbo setup on the forums. It all comes down to what you want.

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TheRipper
Posts: 143
Joined: Mon Jul 02, 2007 6:35 am
Car: 93 Nissan 240sx SE R.I.P. & 90 Nissan 240sx
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boost

s13rb25det
Posts: 598
Joined: Wed Mar 23, 2005 5:30 pm
Car: 92 240sx w/rb25det

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what ever happend to that one guy that was building a supercharger kit for the ka? I can seem to find his website, and did he even build a kit?

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xckid
Posts: 4697
Joined: Thu Dec 16, 2004 5:52 am
Car: 2004 Chevy Blazer ZR2

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turbo FTMMFW

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MoldyOldy240
Posts: 600
Joined: Thu Jun 08, 2006 3:51 pm
Car: 1991 240sx 295K w/ original engine.
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Thomas Knight is the man that built one for commercial sale;

there was also another member on here building on with a supercharger from a different Nissan.

Heres to help you in your direction:

Superchargers are pretty uncharted on the KA, very few have done it, and very little info is out there.

Don't listen to morons complaining that they rob the car of horsepower and blah blah blah... any one who starts saying that is just a turbo fan boi IMHO

Superchargers increase HP/TRQ throughout the ENTIRE power band; which means it also feels more natural.

Turbos on the other hand must be spooled up (usually by exhaust) in order to create power. There are ways to design turbos to almost remove all lag; turbo size, nitrous spooled; but there is always a compromise there.

The nice thing about turbos is that the sky is the limit, and the freeway is your best friend for speed.

/2 cents

cojoe240
Posts: 18
Joined: Mon Oct 25, 2004 9:04 am
Car: NA 1990 240sx / Turbo KA 1992 240sx

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Thanks all I am real excited about my up coming build. I think i am going to go with a turbo set up. The sky is the limit is what i like to hear.

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MoldyOldy240
Posts: 600
Joined: Thu Jun 08, 2006 3:51 pm
Car: 1991 240sx 295K w/ original engine.
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Remember though; your internals may need to be beefed up.

s13rb25det
Posts: 598
Joined: Wed Mar 23, 2005 5:30 pm
Car: 92 240sx w/rb25det

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does thomas knight even sell this supercharger kit any more? I could not find it on his site.

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MoldyOldy240
Posts: 600
Joined: Thu Jun 08, 2006 3:51 pm
Car: 1991 240sx 295K w/ original engine.
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order through email only

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Cameron
Posts: 2809
Joined: Sun Jun 03, 2007 8:15 pm
Car: a 240

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supercharger is a parasite. cuz what ever extra power it makes it has to use some of it to run it. so if you have a 200hp engine, and the supercharger gives you 300 your really only makin 250.. only thing superchargers got going for them are the sound.

s13rb25det
Posts: 598
Joined: Wed Mar 23, 2005 5:30 pm
Car: 92 240sx w/rb25det

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I dont think a supercharger uses that muxh power to turn it. its about as much as your power steering pump. superchargers are good for low boost but you should go with a turbo for any thing over 10psi when it on a ka engine. unless your planning on intercooling and doing major machine work on the supercharger.

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Cameron
Posts: 2809
Joined: Sun Jun 03, 2007 8:15 pm
Car: a 240

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i was just giving an example, i knew it wasnt correct, but thanks for correcting me

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MoldyOldy240
Posts: 600
Joined: Thu Jun 08, 2006 3:51 pm
Car: 1991 240sx 295K w/ original engine.
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Using the term "parasite" is greatly misleading; if you want to look at it from that approach; then your alternator is also a parasite.

Whats important for the decision is WHERE you want to make your power.

I would much rather have a supercharged car for drifting then a turbo charged car IMHO.

southernmantis
Posts: 96
Joined: Sat Feb 17, 2007 8:42 pm

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^ yeah i was thinking the same thing lately.no boost lag,boost creep.you get the power immediately,i am planning on doing this for my drift setup.

Florida240sx
Posts: 11114
Joined: Thu Jul 01, 2004 7:17 am
Car: 1993 Nissan 240SX Hatch 5spd
2012 Nissan Altima S coupe 2.5
Location: DeLand FL

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Any of yall ever seen a ka24de with a small t25 on it? Even my big t3/t4 as son as full boost hits if I have the wheel turned any the wheels breaks loose like I was on ice.A t25 or t28 on a k24de is in the same boat as in putting on a supercharger. Bigger turbo give you a bit of lag but when your drifting your going to be up in the power band where the turbo will be at full boost so it doesn't matter what you use to drift. If you want to be special stay tune as I start my remote mount build up in my hatch. Come over to the ka-t forum

aaronbaird
Posts: 33
Joined: Fri Dec 14, 2007 5:48 am
Car: 1990 240sx

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if there was just as much stuff and info out there for s SC as there was for a turbo, i would definately do a supercharger.

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MoldyOldy240
Posts: 600
Joined: Thu Jun 08, 2006 3:51 pm
Car: 1991 240sx 295K w/ original engine.
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Not to derail this thread; but I've been throwing around a couple ideas around the smoke pit with some friends (mixed Super coupe, mitsu and nissan guys).

If you destroke a KA to square, then take a m90 and place it on there, you would (now please remember this is pie in the sky theory right now) have a high reving engine (probably 8-9K redline; again pie in the sky) with a super charger that would carry it all the way through. At that point, it would appear that since its going on a dual overhead cam setup, the top end wouldn't really be a concern. It would just be the actual crankshaft lol.

This may be something I will look deeply into after I finish my entire all in one suspension and brake setup...


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