supercharging a 240... dead thread... stupid idea haha

[whats_next]

hey everyone i was just curious to see what all you guys thought about this...

What im doing has never been done before so i want some people's input and ideas to help the design along

im planing on supercharging my 240 hatch but im doing it a little differently. instead of the crank or some other pully on the motor charging the supercharger im going to be using the DRIVESHAFT to charge it.

heres how it works...

i have a twin scroll supercharger and im going to be mounting it inside the car inbetween the driver and passenger seat and more towards the middle of the car. (basicly where the rear seat was). im getting a coller custom made to fit around the one piece driveshaft so that the belt for the supercharger will fit around the supercharger's pully and the coller around the driveshaft. next im making the piping from the supercharger to the throtle body so when you start driving and the driveshaft starts spinning and you'll get boost. the piping will go under the car, under the motor and to the throttle body. now there are a few problems with this. you wont get power off the line because you wont get any boost unless the rear wheels are going. and im sure other problems will arrise but i was just wanting to get some feedback on this from you guys because many minds thinking about it will help with trial and error process haha.

anyway hit me up with any feedback neg or pos.

thanks everyone and if your unsure of any of this ask and ill try to clarify.

Ryan

[AkaZero]

The drive shaft will be spinning whenever the wheels are spinning, and spin faster depending on car speed, not engine speed.

So even when you clutched in, you would be constantly gaining boost. It may be do-able but it would have to make almost no boost at low speed, or the engine would not survive any type of high speed, or even high speed wheel spin.

And the tubing to that setup would be a huge pain to run. I think t would be easier to run it normally.

If you want different, try a centrifugal supercharger. It's like a turbo spun by the engine, instead of exhaust.

[whats_next]

ya ive thought about that too. i know i wouldnt get alot of boost at low speeds but as far as med/high speeds and stuff i would have a wastegate on the piping with a spring set at like 8lbs so it would never boost over 8lbs.

ive thought about that centrifugal supercharger but thats really not the design im wantin to go with if i can help it.

thanks for the input homie and yaany other comments welcome...

[wabash9000]

I like the thought but I agree that it will not work. the problem is like akazero said the driveshaft is dependent on wheel speed and you need a supercharger to be in harmony with the engine, not the wheels. I have no doubt that you could make it work but it would require some of the most advanced ecu programing ever done because you would need fuel maps to be based on speed, engine rpm, temp, fuel type, boost levels, and about 10 other things. the equations required to compute the fuel needed at any given point would be stupid hard and would probably lag behind the engine giving bad power delivery. With this setup you would be getting 0psi of boost when stopped and like 60psi at 70mph and like 100psi at 110mph. Because of this insane boost you would either need to 1) have a very strong blowoff valve that limited boost to like 20psi and then you would only make more power until 30mph and then it would stop being helpful. Also the rpm that the supercharger would be spinning at would cause it to go bad in 100miles. 2) gear the supercharger down so that it doesn't peek boost until a higher speed and then there is relatively zero gain until the higher speeds, thus making the power band completely unusable.

other issues I foresee:
when you clutch in or shift at high speed there is still going to be large amounts of boost going in to the engine causing it to spike when there is no more load on the engine.
at a stop the supercharger will not be spinning and no air will be able to make it through to allow the engine to idle when the car is stopped.
the complexity of pipes and oil lines would make it a pain to make and tune and would probably make the whole system inefficient because of the length of the boost pipes.

[wabash9000]

ya ive thought about that too. i know i wouldnt get alot of boost at low speeds but as far as med/high speeds and stuff i would have a wastegate on the piping with a spring set at like 8lbs so it would never boost over 8lbs.

ive thought about that centrifugal supercharger but thats really not the design im wantin to go with if i can help it.

thanks for the input homie and yaany other comments welcome...

seems like a lot of work for 8psi.

[krazi]

Yeah, i just thought of something. I dont know much about boost, but unless you controlled the boost(I dont know if this is even possible, but I bet it is). Wouldn't you lose all the boost when you would do ebrake - clutch kicks? Just a thought, remember, I am an NA guy!

[wabash9000]

Yeah, i just thought of something. I dont know much about boost, but unless you controlled the boost(I dont know if this is even possible, but I bet it is). Wouldn't you lose all the boost when you would do ebrake - clutch kicks? Just a thought, remember, I am an NA guy!

that's true you would loose all boost and probably kill the engine from pulling the ebrake, but also once the rear tires are broken free you would get more power than you did before because of the extra tire rpm which I believe would get you a very unreliable power band when the rear wheels are spinning.

[whats_next]

we got some smart people on here haha

thanks for the input guys. i came up with a few solutions to the problems you guys said but wabash9000 i think your right about it being more trouble than its worth. as far as the oil lines go the supercharger that i have doesnt require oil lines to it or water lines. and for when your at a stop the motor wouldnt die because the SC that i have has and intake side that at a stop it can breathe though that.

but for an e brake slide and clutch kicking and stuff i cant help but think it would be too hard to map that for an ecu and stuff.

alright plan B. haha more i think about it and hear from you guys and stuff i see more problems than what its worth..

[AkaZero]

Still would be awesome to see a supercharged KA. You just probably have to go with a belt pulley to the engine.

[whats_next]

ya thats what im going to do...

[RB240]

you should check out www.KA-T.org they have a turbo section as well as a supercherged section chalk-full of useful info.

[whats_next]

really? a supercharged section? hmm ill check it out thanks!!

[usar89b]

I think I remember a thread on NICO where a guy took a supercharger from a Nissan Pickup or Pathfinder and made a custom flange to mount it to the KA upper intake manifold in place of the lower manifold.

http://forums.nicoclub.com/zerothread?id=386649

[jFries]

http://zilvia.net/f/tech-talk/273076-su ... build.html

Here you go.
I think it's dope as fuck.

[ICEMAN]

here is a KIT for sale on KA-t.org

http://www.ka-t.org/forums/viewtopic.php?t=43868

and might i suggest you not to go with the SAFC.... *Cough* bear paw tunes *cough*

[KC240SR]

^^ I agree with Steve, no SAFC, its just not worth it to be honest. Either have Steve tune your ECU or go with a nice stand alone system.

[whats_next]

i would for sure go with Steve's tune. he's a f**king genius haha

[nebrs13]

http://zilvia.net/f/sale-items/179309-supercharged-ka24de-dynod-track-proven.html

[datsun260z]

just my input for what its worth, (not much) but while working on swaps for the datsun, i found many ka-s setups, (if you wanna call it that) in 510s and z chassis, the best looking budget set up i found was a custom made upper intake set up made to fit a gm 3800 supercharger from a bonneville, regal, gtp, etc, and a small pulley on a rebuilt ka with low compression etc, heard impressive numbers on it, something about it being a s-charger for a V6 stuffed on a 4 banger and then shoved into a light weight datsun chassis made for some cool stuff, plus the one i remember best had everything polished or pwdr coated red, look sharp and he said it was reliable as a daily and drove across country for the z fest last year. something you might try to search, i'll post a link to build if i can remember where i found it, but parts and all starting with a ka needing rebuilt he rebuilt it and got everything to boost it from a upick it type place and built, minus powder coating, for under $1000. i looked into it but i always wanted to stay inline 6

[garage hero greg]

not gonna lie after seeing the first post i didn't really ready any further, but did you think about what is going on in reverse gears?