electric suprecharger

[driftnslide1]

im thinking of making a high end electric turbocharger for my KA. i took a look at the Thomas Knight website and saw how simple his kits are. i have a couple of ported toyota CT26 turbos and was thinking about how hard it would be to mount up a electric motor to the exhaust side at low RPMS. i do have a couple of questions though. if i pull the housings apart and just use the compressor side will it stay together and hold boost? i really dont wanna push that much. Also, what kind of RPMs does a turbo have to turn to make about 3-6 pounds. for the CT i was guessing about 10k. what do you guys think? Just a project i wanted to try.

[jubee]

First off i would not follow anything Thomas Knight does that guy is a fraud, his work is stright trash.

[karmakaze]

First off i would not follow anything Thomas Knight does that guy is a fraud, his work is stright trash.

Wow. I had not heard of this guy so I googled him. Thats some gheto crap right there.

even these hyundai guys are knocking on him. now that really tells you that its crap.

http://www.hyundai-forums.com/...o.htm

[sup4fr34k]

First off i would not follow anything Thomas Knight does that guy is a fraud, his work is straight trash.

+1 They don't work.

[bone_stock_240]

I just love how the batteries required to make his ESC system run, aren't even included in the $1700, and not included in the weight of his ultra light weight super fantastico amazing turbo charger. One good thing about the kit is it comes with ample supplies of fairy dust and gypsy tears. Where I come from, Canada, it is a long dog sled ride to the closest igloo depot, where I can trade fish and dried meats in return for the lastest offering by Thomas Knight.

[nissanman04]

it comes with ample supplies of fairy dust and gypsy tears.

i see that stuff on ebay all the time dude

[driftnslide1]

i only got the idea from him. its just something id like to try. it would be nice if some one could answer some of my questions though.

[thomasjamal]

i only got the idea from him. its just something id like to try. it would be nice if some one could answer some of my questions though.

If you just stop and compare the rpms that the electric turbos spin at and compare it to a real turbo you will understand why these don't work.

Once you hit 50 mph an electric turbo will not spin fast enough and will actually slow your air intake down.

Do some searching on these and you will see some really in depth explinations of WHY these don't work.

[bone_stock_240]

Yeah, I really can't see being able to buy an electric motor to fit the criteria cheap enough to make it realistic. It would have to be small, powerful, incredibly high speed, and super reliable. And since torque is directly related to the diameter of the motor, there isn't really anything you can do if you need more power, other than increase the size, and weight. Turbos can also spin as fast as 250 000 RPM, so as was said before, The electric turbo would not be able to spin nearly fast enough, and end up starving your engine of air.

However, I am kind of hungover, so I may just be talking out of my ***.

[thomasjamal]

However, I am kind of hungover, so I may just be talking out of my ***.

Nope, I think you are right on.

[Bronze MFP]

people are always looking for cheap horsepower, fact is, its not gonna happen. the ways of making big power have already been established. get a nitrous kit if you want down and dirty, cheap as it comes horsepower. or save a little and have an insanely fun turbo KA setup. or try one of the KA supercharger kits that are on ebay.

[CleanSfourteen]

Ya, i have to agree that this 'electric supercharging' is a big fraud, your car's power supply could not power a motor capable of producing the boost you are looking for.

[Iscariot]

Maybe you've seen the tires melt on our ESC™-charged test vehicles at Moroso Motosports Park. Maybe you've seen our feature article in Turbo Magazine and the full-page ads in Power Pages, Turbo, and Sport Compact. Or maybe you've seen the buzz across hundreds of message boards and want to know why everyone is so excited about "another POS bilge pump fan that cannot possibly work."

haha yeah ive seen the buzz.

[driftnslide1]

Turbos can also spin as fast as 250 000 RPM, so as was said before, The electric turbo would not be able to spin nearly fast enough, and end up starving your engine of air.

well what if i had a motor that could spin at 110k rpms. i know im not gonna need 250,000 cause that would be far too much boost. i have a brushless plane motor that makes some substantial torque. (keep in mind this is an electric motor that lifts a 8-9 lbs plane and hits well over 90k under load.)

the largest problem with Thomas Knights Design and why his can only for a short period on time is because they are practicaly running dry. they dont use any oil lines. they build up heat after just a short run.

on the Air research turbo im building right now im using a oil based teflon bushing. it acctually needs no lubrication, so heat almost isnt a problem. at all.

in addition i may also use gear reduction similar to whatyou may see on an RC car as that is what im most familiar with so if i need more torque and can sacrifice rpms then that really inst a problem. i know that this has been tryed before and that people on ebay make cheap pieces of crap that dont really do anything but I'm trying do do somthing differtent. theres no need to get angry and post if you dont think its a good idea. ill send some pics if i can get some. the rain has been keeping me from working out side so when the rain stops ill get back on it and take some shots.

[bone_stock_240]

I don't know, I am still skeptical as to whether it would be able to put out enough power. Driving an R/C propeller would be alot easier than a centrifugal impeller. The loads on the impeller would be alot greater. Also, what kind of mega rc engine is this? 90 000 rpm? Why on earth would it need to spin that fast? I cant see how a propeller could be efficient at those speeds. Are you sure your information on the motor isnt wrong and it is actually 9000 rpm. If your motor is capable of 110 000 rpm, then that converts to roughly 12000 rad/s. the speed of sound is 334m/s. so therefore, in order for your model propeller to not have blade tips breaking the sound barrier, the propeller would only have a diameter of 5 centimeters. Propellers become super inefficient when their tip velocity goes super sonic, and it seems to me that an 8 - 9 pounds model plane would need a bigger than 3inch propeller. How would you even be powering the motor? I am not trying to attack you or anything, just inquiring because it doesn't seem to me that it can be succesfully done.

[neverlift]

send me one of your tubos I'll get it to work

[sup4fr34k]

well what if i had a motor that could spin at 110k rpms. i know im not gonna need 250,000 cause that would be far too much boost. i have a brushless plane motor that makes some substantial torque. (keep in mind this is an electric motor that lifts a 8-9 lbs plane and hits well over 90k under load.)

the largest problem with Thomas Knights Design and why his can only for a short period on time is because they are practicaly running dry. they dont use any oil lines. they build up heat after just a short run.

on the Air research turbo im building right now im using a oil based teflon bushing. it acctually needs no lubrication, so heat almost isnt a problem. at all.

in addition i may also use gear reduction similar to whatyou may see on an RC car as that is what im most familiar with so if i need more torque and can sacrifice rpms then that really inst a problem. i know that this has been tryed before and that people on ebay make cheap pieces of crap that dont really do anything but I'm trying do do somthing differtent. theres no need to get angry and post if you dont think its a good idea. ill send some pics if i can get some. the rain has been keeping me from working out side so when the rain stops ill get back on it and take some shots.

no offense but you do realize 110k rpms is less then half of 250krpms?Motor sports is a field of innovation though and if you think its going to work well try it! lol

[180fan]

why this thread continues is beyond me. If you were already so dead set on giving it a try, do it. You've heard other peoples opinions on the matter and didn't want to hear it. So just do the electric motor and tell us how it goes. Either way there's gonna be a "see? I told you so" somewhere in the near future.

[sup4fr34k]

why this thread continues is beyond me. If you were already so dead set on giving it a try, do it. You've heard other peoples opinions on the matter and didn't want to hear it. So just do the electric motor and tell us how it goes. Either way there's gonna be a "see? I told you so" somewhere in the near future.

180fan aka destroyer of hopes and dreams

lol j/p

[bone_stock_240]

Imagine if he pulls it off and becomes even more famous than THOMAS KNIGHT!!!! (that only works if you imagine it being said in a booming voice)

[driftnslide1]

i was using the brushless motor but i guess i really didnt have enough torque. i wasnt considering the fact i usually use this motor with a grear box. im trying my monster RC motor. it has mush more torque and got my 1/8 scale funny car to over 110mph in under 6sec. unfortunatly im getting a substantial vibration at about 4k rpms. i need to change back to a brass bushing i think. hopefully this turbo im using isnt hosed. it seems like im moving a HELL of a lot of airand the motor has a lot left in it.

[neverlift]

you have just got to post pics of this event I am curious wht I do not fvcking know but still I am.

[bone_stock_240]

Dude, can I see pictures of these electric motors along with something else to show their size? Can you also provide the specs on them, like field constant, armature resistance, shaft speed, voltage, current, torque, yadda yadda yadda. Actually the whole characteristic equation would be nice if you have it.

[180fan]

180fan aka destroyer of hopes and dreams

lol j/p

why thank you, but flattery won't get you anywhere lol

[thomasjamal]

i was using the brushless motor but i guess i really didnt have enough torque. i wasnt considering the fact i usually use this motor with a grear box. im trying my monster RC motor. it has mush more torque and got my 1/8 scale funny car to over 110mph in under 6sec. unfortunatly im getting a substantial vibration at about 4k rpms. i need to change back to a brass bushing i think. hopefully this turbo im using isnt hosed. it seems like im moving a HELL of a lot of airand the motor has a lot left in it.

If you have the time and resources to make this work go for it! I would love to see you prove everybody (including me) wrong.

If you can make it work and an affordable upgrade you will be the new 240-god, or at least like the captain of the football team or something...

[jmhalder]

lol, this thread makes me laugh, but hey if you do it, and can make a respectable +50hp over stock across the whole powerband... ill wear a dress, seriously, your still gonna need to go with 370's a walbro, and some means of tuning... at that point youve already invested a bit of money, so just rock a SMIC and a T25/ebay mani and you'll save the headache

[Logan76]

BUY A REAL TURBO.

[jmhalder]

you call that a knife... THIS is a knife!...re: thats not a knife, thats a spooni see youve played knifey spoony before!

you call that a turbo, THIS is a turbo

[bone_stock_240]

I was gonna install that one in my car, but I am not sure whether I want to modify the hood to fit it. Do you think I would need to go to forged internals if i want to run 2000 psi of boost?

[Logan76]

Hah dawg my stock cast internals on my KA are holding up to 2200PSI + a 1700 shot of naws.