Homemade Dyno, small engine DIY dynamometer

I put together a homemade small engine Dyno for a DIY build, to tune some kart and mini bike engines. Subscribe to see how I'm breaking it in with futures videos and doing calculation for HP ratings! I've been discussing many things with DIY dyno groups and people with similar machines to get the most accurate break in and test procedure as can find! I will be making minor adjustments as listed in the video, based on what I find to be best! I'm going to be tuning engines for go karts, race kart engine tuning and mini bikes. I wanted to have a home made dyno that could do about 20 HP. I have not tested the limits yet. Due to how this video took 2 months to source all parts and with "world events" get them to me, I'm putting this up for the how to make a small engine dyno portion. Subscribe and check back to see how I use it and check horsepower gains for performance engine tuning! I've still got my Tillotson 212r race engine video to compare to the Predator 212 non hemi engine, but the Tillotson engine is having a few performance issues. It's coming as soon as I can get it up and going. Lots of Corona projects delayed, but they are still on the way! Total cost for this Small Engine Dyno was $500 plus tax and shipping. I called a few other places, their dynos cost anywhere from $5000 for a base model without computer graph, to $15,000 with computer print out and all the bels and whistles. I have seen used dyno cost $4,000 for inertia dynos to $8,000 used. Some water brake and hydraulic dynamometers cost $3,000 to $8,000 used. So basically I'm cheap, and want to tune engines. -- Parts for instructions for my DIY Dyno seen in video -- Parts coming from Hydraulics Direct in Colorado USA: 5/8" ORB (SAE 10) Male x 1/2" NPTF Female - (Note: can use swivel female adapter here instead for ease) 3/4" ORB (SAE 12) Male x 3/4" NPTF Female - (Note: can use swivel female adapter here instead for ease) https://www.hydraulicsdirect.com/ORB-Male-x-NPTF-Pipe-Female-Adapter-p/6405.htm 1/2" NPTF Male x 1/2" NPTF Male (*QTY 2*) https://www.hydraulicsdirect.com/NPTF-Pipe-Male-Hex-Nipple-p/5404.htm Extender - 1/2" NPTF Male x 1/2" NPTF Female https://www.hydraulicsdirect.com/NPTF-Pipe-Internal-External-Connecxr-p/5405.htm Union Tee - 1/2" NPSM Swivel x 1/2" NPSM Swivel x 1/2" NPSM Swivel https://www.hydraulicsdirect.com/NPSM-Pipe-Swivel-Female-Tee-p/1603.htm 90 degree Elbow - 1/2" NPTF Male x 1/2" NPSM Swivel 90 degree Elbow - 1/2" NPTF Male x 1/4" NPSM Swivel 90 degree Elbow - 3/4" NPTF Male to 1/2" NPSM Swivel 90 degree Elbow - 3/4" NPTF Male to 3/4" NPSM Swivel (*QTY 2*) https://www.hydraulicsdirect.com/NPTF-Pipe-Male-x-NPSM-Pipe-Swivel-Female-90-Elbow-p/1501.htm Note: extra mentioned "ease of assembly parts" - I recommend getting as you'll see in my next video 1/2" NPTF Male x 1/2" NPSM Swivel [$2.69 each] 3/4" NPTF Male x 3/4" NPSM Swivel (*QTY 3*) [$3.24 each] Note: I used discount code "new20" to save money. It may still work. Part coming from BMI Karts: Fully Adjustable Motor Mount Plate with bolt kit https://www.bmikarts.com/Motor-Mount-Plate-for-4-7-HP-Mini-Bikes-Doodle-Bug-Baja-Motovox-etc_p_10542.html Parts coming from Amazon, but can come from other sources: Dynamic Fluid Components hydraulic pump with 3/4" shaft and key (CLOCKWISE direction - NOTE that most CLONE engines run counter clockwise) GP-F20-20-PL-C https://www.amazon.com/gp/product/B001EN0426 Hydraulic Hose 3/4" x 48" 2-wire Male to Male https://www.amazon.com/gp/product/B0021BUTTI Hydraulic Hose 1/2" x 48" 2-wire Male to Male https://www.amazon.com/gp/product/B000PDNATU 5 Gallon Field Tuff Hydraulic Fluid Reservoir https://www.amazon.com/gp/product/B076XQBF9N 2 1/2" pressure gauge, liquid filled 0-2000 PSI 1/4" mount NPT (Note: I upgraded to this 3,000 PSI since video was made) https://www.amazon.com/gp/product/B01N4GRP18 In-Line Variable Control Valve 1/2" NPT connections https://www.amazon.com/gp/product/B07N98PPCP Thread reducer bushing 1 1/2" Male to 3/4" Female NPT https://www.amazon.com/gp/product/B01MZ3JKBU Teflon thread tape Digital tachometer (Note: not the best option for high RPMs AND needs to be mounted directionally for the magnet if used) https://www.amazon.com/gp/product/B01FQMI18Y 10' #40 chain with 2 master links https://www.amazon.com/gp/product/B018WGY7D4 3/4" centrifugal clutch 10 tooth, 420 chain sprocket https://www.amazon.com/gp/product/B07JQ1S291 #40 size 36 tooth sprocket 3/4" bore https://www.amazon.com/gp/product/B078Z76BG2 Coming from Tractor Supply: 5 gallons hydraulic fluid Coming from hardware store: 1 1/4" x 3/8" carriage bolts with metal locking nuts (*QTY 2*) 2 1/2" x 1/4" bolts with washers and nuts (*QTY 4*) 5/8" x 1/4" bolts with metal locking nuts (*QTY 4*) Can save money by using propane or other tank, if have an older tach. if already have clutch, if already have mounting plate, if anything goes on sale.

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