SUPERCHARGE a KA24DE? anyone??

[mackdaddy240]

I just built a ka24de with 11.1 to 1 compression I'm putting a new metal gasket in it that will lower it to 10.6:1. Thats still to high for a turbo and I've heard that a supercharger is safer on higher compression motors. Does anyone know if it would be hard to put a supercharger where the AC pulley is? Or has there ever been a supercharged ka24de? if not I'm definately going to do it but if there are some then how did they do it?

[thekage]

Everyone has wanted to build a supercharger for the ka.. but as far as I know.. no one has done it.Unless you can build a custom intake roots type.. you would have to use a centrifugal type. Like the vortech unit. Basically go with a turbo type setup.. you could either make piping simple with a smic and relocate your battery and build a custom rack to hold it and the pulleys right there where the battery was.. or on the opposite side.... it could easily be done... just needs a ton fabrication and custom work.With the ka's tourque.. I would love to see it done. It would be amazing.Ive wondered about welding another pulley onto the crank pulley to power the sc, rather than scrapping ac or ps. or take off the fan.. leave the pulley.. and weld another pulley onto that one to power the sc?

[j-z]

ive thought about sc my ka a while ago, then decided i would hold off on it until i got more seat time in at the track. it could very easily be done and i wouldnt be surprised if its already been done. i was just going to get a pulley welded on the fan pulley to spin the compressor. i was going to use a vortech if i did it. a sc 240 would be soooo bad ***. just picture it at an auto-x

[MikeMurphy]

I just built a ka24de with 11.1 to 1 compression I'm putting a new metal gasket in it that will lower it to 10.6:1. Thats still to high for a turbo and I've heard that a supercharger is safer on higher compression motors. Does anyone know if it would be hard to put a supercharger where the AC pulley is? Or has there ever been a supercharged ka24de? if not I'm definately going to do it but if there are some then how did they do it?

I dont see why 10.6:1 would be too high for a very low-boost setup.

Why would a supercharger be "safer" on high compression motors? I cant think of any reason.

Yes the 240 has been supercharged before.

Just a thought, AND I DONT WANT THIS TURNING INTO A TURBO VS. SUPERCHARGER THREAD, but wouldnt a very small turbo net the exact same advantages as a supercharger in this situation, since your running high compression your not running much boost anyhow??

[TheOne]

you could try around lookin for a roots type like the 1's on miata's and some other cars, after lookin at it, it might give ya an idea of how to build 1 for the KA.(i know they're VERY different engines but ya can get an idea from it). as far as i know there is a roots style supercharger for the miata.

here, kenne-bell makes a twin-screw type for a miata.Kenne-bell

that 1 would make a KA be so torquey.....

[VCthuglife]

did nissan ever SC any of their cars? or maybe the old MR2s had an SC the was on the intake side of the engine...

[PMan_S13]

There have been a couple of sc ka's out there... before nico got its archives deleted there used to be a unch you could go and read.

High compression is bad for any forced induction motor. Unless you plan on running alcohol or race gas that is just too high compression in my opinion. but that's just my opinion. The problem is the high compression mixed with the added heat and pressure of the forced air, just makes too much heat. That leads to detonation which leads to a blown motor. Now if you can eliminate that detonation you are fine. But you might have really dampered yourself building an NA motor and then deciding to sc it.

But if you did get it going, I'd say 5 psi on that high compression motor would make some rediculous low end torque. And it would be so responsive it might be scary.

Good luck man

[IvanAtSPRacing]

Just a thought, AND I DONT WANT THIS TURNING INTO A TURBO VS. SUPERCHARGER THREAD, but wouldnt a very small turbo net the exact same advantages as a supercharger in this situation, since your running high compression your not running much boost anyhow??

The answer to this question is NO. A turbo uses between 5 to 7 HP to move enough air for an extra 100 HP. A supercharger uses about 30 HP to move enough air for an extra 100 HP. Therefore, to get the same WHP there will be more load on the motor with a supercharger then you would with a turbocharger. The advantage of the turbocharger is clear.

Also, a centrifugal supercharger will not provide full boost till your at your max rpm (redline) so at anywhere below that RPM and above the full spool RPM of a turbo setup, you will make LESS HP then with the turbocharged application. A roots style super charger will provide full boost at ALL rpms so at RPMs below full spool on the turbo setup, you will make MORE HP.

[S13ChucKAT]

didnt the frontier have a SC on some units?...

[ArticDragon192]

Didn't some guy with a Hardbody SC his KA? I remember he used an old MR2 SC and modded it to fit his Hardbody KA.

[VCthuglife]

i'm assuming that the mr2 used a roots type sc because most of the after market sc's are centrifugal, i could be totally wrong though

[andrave]

yeah frontier and xterra were available with a supercharged engine, but wasn't that a six cyl?

[Jarret]

Yes the frontier and exterra use the EATON supercharger for about a %25 HP gain.... woo hoo

I was one of those Deleted Archive Nico members who had a supercharged 240sx, in fact it was put my hatch first and then on a convertible, it's off now and the setup will be going on my coupe over the winter that I bought last week. This time I'll make sure I got all the pictures and copy the bracket that was custom made. Who knows, I might even make a kit. The setup was a Powerdyne bd-11 internally oiled so no oil lines were needed. I used a cobra maf and hooked up a retro fit to an AEM intake kit as well, and incidentally the cobra kit for the mounting of the sc. As for power, I'm no rocket scientist, but that fugger was a rocket. the 6psi pulley ripped the tyres though all gears.

PLUSSES:No oil cooler/ intercoolerno header workno new oil lines no need to constantly worry about t03/04/28...crap and worrying about cooking your turbine.no turbo lag.

Remember: No self respecting NHRA dragger will ever use a turbo...

[andrave]

I dunno about that NHRA stuff, it seems that in most classes where it is allowed, very large turbos seem to be dominating.

[Chezedik]

I have personally posted my own thread on this one (please check it out, and leave any info, and let me know of an overall interest). I think I have worked it out, but I am debating on the size of the blower (yes, I said blower, research it.) But what I need to know is what the interest is. My machinist friend and I can work this out, and by the way, I have two ideas, and neither is terribly difficult, my hard parts... well, I will keep those my secret, but please, let me know. What is the expected gain, and what is the willingness to pay for those gains.

[TrunkMonkey]

Remember: No self respecting NHRA dragger will ever use a turbo...

...yes, but can you tell us why they won't? i'll give you a hint. it has nothing to do with which setup would make more power.

-demetrius

[jab11185]

isn't it something to do with the rules....turbos aren't allowed in NHRA i thought