where to buy a R.P.M. gauge to read the total R.P.M. of my turbojet engine or how to make something this is a turbocharg

 i need a device to read the R.P.M.s of my home made turbojet engine? what can i use (turbocharger) weel speed 

Question by mirella1925 9 years ago  |  last reply 9 years ago


Turbocharger Compressor Characteristics.

Hi, I am working on building a micro jet engine, and I have to select between the following compressor wheels  http://www.ebay.com/itm/Turbo-charger-Compressor-Wheel-H1C-H1E-3599644-Ind-56-00mm-Exd-83-00mm/262249425295?_trksid=p2047675.c100623.m-1&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D2%26asc%3D40130%26meid%3Da741d83f102946f8ab1a494b9f98692c%26pid%3D100623%26rk%3D4%26rkt%3D6%26sd%3D301844324395 or http://www.ebay.com/itm/HE351CW-HE431V-HX40W-HY35-Turbo-Turbocharger-Compressor-Wheel-4035879/111866311491?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D2%26asc%3D20131003132420%26meid%3D42565bcbcf264701aa897ff600931d8c%26pid%3D100005%26rk%3D1%26rkt%3D6%26sd%3D301844324395. However the seller does not seem to have any data regarding the wheels max RPM, slip factor, blade angle, and pressure gain at different RPM's ( probably a graph ). Is there any way I can get these piece of information about the wheels especially the first three. Most of the wheel parameters like the gas tangential velocity, radial velocity and the mass flow rate at the wheel's outlet need these values to calculate. Thanks for any help.

Question by fictionlife1659 1 year ago


Turbocharger to generator conversion? Answered

Hey, I was just wondering, could we turn a turbocharger into a generator that would produce electricity as water flows into one gate and out the other?  Similar to a hydroelectric generator using the mechanical energy of flowing water through a turbine to produce electricity.

Question by Supercoop411 7 years ago  |  last reply 1 year ago


In theory, can you hook a turbocharger to the end of another turbo to make the 2nd turbocharger spin at a faster rate?

I need to know if you can hook a turbo to the output of another turbo so produce a faster rate and air flow, not for car so dont worry im not going to blow up my engine. Also wondering a couple other things car parts related while I am at it, how much force does it take to spin an alternator when its "on". i know that when the car is not on it free spins but once it is and does not have belt hooked to it it is hard if not impossible to turn by hand. thanks for the help.

Question by jobergy 8 years ago  |  last reply 8 years ago


Small 2-stroke Turbocharger

I was wondering if any one had heard of attaching a small turbo charger to a lawn mower or weed whacker , if anyone has heard of it could you explain how, as i am anxious to try this with my recently salvaged 2 stroke and just see as much power i can suck from it.

Topic by firemanfu 10 years ago  |  last reply 1 year ago


Finishing my turbocharger jet; Just a few questions!

Hey all, I'm currently building a turbocharger based jet engine, and i'm nearly done. The one problem stopping it from becoming a finished machine is how to get a good reliable spark. Is it possible to use a glow plug in the combustion chamber and a glow starter insted of a spark plug? All my attempts to use a spark plug have failed so far, and I would love to be able to avoid the issue of 555 timers and electronics needed for reliable sparks, since I haven't a clue how they work.

Question by OldManMahoney 10 years ago  |  last reply 8 years ago


How can I combine a salvaged auto turbocharger and a generator to make electric power? Answered

I am considering a hybrid engine for a golf cart.  I want to take a salvaged auto turbocharger as a base, use "alcohol" for fuel, and generate electricity for the electric motor of the cart.

Question by hardlec 9 years ago  |  last reply 3 months ago


Do turbos make a car have a whine sound to them? or is it just the rice burner?

Or is it just the rice burner's mufflers i'm hearing? I wanted to know because i wanted to put a turbocharger on a '51 Pontiac Chieftain. Obviously, i don't want it to sound like an asian car.

Question by red9er 7 years ago  |  last reply 7 years ago


Why don't superchargers and turbochargers break the laws of physics and HHO generators do? Answered

I saw an article today on how HHO generators are just a scam.  There are of course many scams associated with it, but I have yet to test the whole thing myself so I have yet to form a solid opinion on the whole thing.  One of the biggest arguments is that based on the laws of thermodynamics, the same energy is required to split the water as is released when they recombine.  This is true, but couldn't there be other benefits to the whole thing which are being ignored.  If that statement was true wouldn't eco-boost engines be a scam.  The turbocharger can't just create energy can it.  The exhaust which spins up the turbo causes back pressure on the engine right. Then there are friction and slip as well.  It seems very lossy right, but it works. It isn't a scam.  The same goes for a supercharger, the same energy of the added compressed air is taken from the engines drive train.  Now I understand that the compressed air causes a better burn similar to mixing KNO3 with sugar vs just burning it in plain air.  But what if you mix gunpowder and sugar, why is that any different.  I feel like this analogy accurately displays what is going on in both cases, and I feel like there could be an argument for the benefits of HHO. Again I have no experience in the subject yet, but it all seems reasonable. The HHO isn't being used as a fuel, it is being used as a booster which pulls more energy, more efficiently from the petrol.

Question by jj.inc 4 years ago  |  last reply 3 years ago


jet engines

Hey! i want to built a gas jet engine without the turbocharger! can u help me with combustion chamber and inside shaft ! and one more question! how to convert the power of a jet engine in speed!?

Topic by hreashi 8 years ago  |  last reply 8 years ago


DIY water jet engine?

Hello. Me and couple of my local DIY buddies are also big fans of fishing. Because we are all students and can't drop 1K+ on normal outboard motor for our tiny aluminum boat, we are thinking on making our own. What we have here is a 200cc lawnmower engine. Because we don't wanna get into business of making our own gears we are looking for ways to implement water jet system. The problem is we just can't figure out what is gonna do a good job of being our turbine. Any suggestions? Does anyone know if the intake half of automotive turbocharger is gonna for pumping water?

Topic by Kizzmansky 8 years ago  |  last reply 8 years ago


Looking for help making a simple on/delay/off circuit.I? Answered

I am looking for help making a ( hopefully simple ) circuit to drive an electronic relief valve. What I have is a push button on a linkage and an electronically actuated valve. I'd like a circuit that, when the button is pressed, will supply a 12v output for roughly 500ms immediately after the button is pressed, which will then turn off. The circuit must then remain off while the button remains held, until it is released and hit again.  Linkage open / Valve closed > Linkage closed / Button pressed > Valve open 500ms > Valve closed / linkage remains closed > Repeat The system is for a turbocharged diesel engine. When the throttle is snapped shut, the boost pressure has nowhere to go. It tries to run back out the compressor housing. This results in a forceful drop in turbine RPM, and in extreme cases even completely stalling the turbine ( and blowing it to pieces ) I intend to vent this pressure back pre-turbo via a 2 inch valve. The short delay upon closing the throttle with this size of valve should be more than adequate. I also intend on wiring a boost pressure switch to disengage this circuit below 15psi. The turbo's anti-surge housing is effective at the lower pressure. Any help with the circuit would be GREATLY appreciated! 

Question by jacob5680 6 years ago  |  last reply 6 years ago


How build a cost-effective device that automatically clears exhaust fumes out my garage?

Soon I'm going to move into a building which shares living quarters with a garage. I'd like to rig up some sort of relay-triggering device that opens a nicely sealed set of vents (one intake, one output) and activates a fan exhausting garage air  - one that activates the minute I open the garage door, and then continues exhausting fumes for a few minutes after I drive the car away (and close the garage door). After those couple of minutes, the fan would stop, and the vents seal shut Due to the "lay of the land" (garage right off a busy road, with very short hidden driveway) I will be backing the car in, so exhaust gases will be concentrated at the back of the garage (close to living areas) - rather than near the open garage door. And as my car has a turbocharger, I often need to let it idle for a minute or two ( to let the turbo cool down) before turning it off to park. So it would be most useful to be expelling those exhaust fumes out of the garage! The question is - what's really the most simple and cost-effective platform for this kind of a system? Could a 555 timer, a few discrete components and some relays do the job elegantly? Or am I better off just diving into Arduino-Land?? Any related ideas (solenoid-closed vents, efficient fans, ducting through walls, etc ) that are especially thrifty - would also be greatly appreciated!!!

Question by rockandroller 4 years ago  |  last reply 3 years ago


How To Turbo-Charge My LED Light String

I am new to electronics, but I have an idea and hope that it’s simple enough for some of you with more experience can tell me I’m either on the right track, or complete wasting my time. I have looked at a number of basic solar light / charger circuits in here and on the Web, and have a very basic grasp of how they work, but the intricacies and exceptions are still fuzzy to me.  I don’t want to recreate the circuits, and want minimal soldering since I’m new to that too. I have a 40 foot long string of 100 LED solar lights that are driven off of one hard-wired AA Ni-MH 1200mah battery.  There are three ideas I have to supercharge the string to improve it.  Without tracing through the existing circuit (which I may not understand anyway), I want to draw on your experience before I get too involved. If I ultimately need to pull things apart and try and trace the circuit, I will, but until then, your guidance would be appreciated. I would like to: A) Remove the old battery and add a larger capacity battery since I currently get maybe three hours of light.  Probably easily done. 1. Changing the battery to a larger capacity looks straightforward.  I will be adding a D cell (if it fits the case) NI-CD with 3000-5000mah (not purchased yet).  Since the cell is the same voltage, can I assume that the swap doesn’t really affect the circuit? B) Add another solar panel.  Probably easily done.  1. I have one small solar panel that came with the unit which feeds the existing battery.  I am assuming that it is 2v (to suit the AA battery) and based on the size, I am assuming that it is between 100 and 150ma peak output.  I would like to add another small panel that I have lying around that is rated 2V / 150ma.  Installing these in parallel should give me a higher energy input, but still at the 2v. Looking at the circuit board the solar panel goes to the board before the battery.  I am assuming that the only thing between the solar panels and the battery is the diode, and that there isn’t any sort of current / voltage limiter on the board.  Can I assume this? Is the diode likely to handle me doubling the power through it? 2. My calculated peak solar power for the two looks to be about 250 to 300ma.  By following the 10% rule for charging and assuming that I’ll likely not get 100% rated solar power for long,  I’m assuming that I my D-cell should handle the trickle charge? C) Increase the power through the white LED’s.  This is my main question, and biggest uncertainty. 1. I am assuming that driving 100 lights off of one battery does not really get close to the maximum.  I pulled the shrink tube off of one of the LED’s and it appears a simple parallel connection.   I don’t see any resistors that are inline with the LED bulbs or directly before or after the LED string wires on the board. I’m assuming that I can add a resistor in series with the light string. Will the light output change much? How can I figure out what resistance to add without blowing my LED’s? Am I on the right track? With my very rudimentary (and possibly wrong) multimeter skills, I tried to find the following as well: Battery voltage – 1.16 v Voltage (measured as parallel with the light string) – 2.56 v Current (measured in series with the light string) – 13.1ma (this sounds low?) I’m slowly learning my way through this, and I want to put together an ‘ible together when I’m done.  Any help, corrections to my assumptions or suggestions you have are appreciated. Sorry for the long-winded message. Craig

Topic by harley1974 7 years ago  |  last reply 7 years ago