Hewitt's Intertia Dynos - Engine Dyno's » go-kart

EBAY: NEW HEWITT INERTIA ENGINE-CLUTCH DYNO DYNOMOMETER

ambush — Wed, 18 Feb 2009 03:19:06 +0000

THIS E-BAY ITEM IS A CLUTCH TYPE INERTIA ACCELERATION DYNO. IT USES THE CLUTCH ON YOUR ENGINE.

CLICK HERE TO GO TO E-BAY LISTING

IT WILL COME WITH A 30 HP FLYWHEEL. IT COMES WITH A ADJUSTABLE HEIGHT CONTROL STAND WITH THROTTLE CABLE, KILL SWITCH & WIRING, BRAKE SYSTEM & LINES, & THROTTLE ASSEMBLY. IT WILL COME WITH A USED 4 CHANNEL DATA ACQUISITION SYSTEM THAT HAS HEAD TEMPERATURE AND (1) NEW 14MM TEMP SENSOR. THIS ALLOWS YOU TO MEASURE HORSEPOWER, TORQUE, ACCELERATION, HEAD TEMPERATURE, CLUTCH ENGAGEMENT, SHIPPAGE RATIO, WERE TOTAL LOCK-UP OF CLUTCH OCCURS. IT WILL ALSO COME WITH A USED DIGITAL WEATHER STATION SO YOU CAN DO MANUAL S.A.E. WEATHER CORRECTION. IT WILL ALSO COME WITH A SMALL PARTS KIT TO GET YOU STARTED, KEYS, SHIMS, CLUTCH BOLTS, BRAKE BLEEDER, ETC. I DO HAVE A PALLETING FEE INCLUDED, WHICH MEANS, IT WILL BE BOLTED ONTO A PALLET AND SHRINK WRAPPED, THEN TOTALLY ENCLOSED IN PANELLING TO PROTECT IT DURING SHIPPING. YOU WILL NEED A FORKLIFT OR SOMETHING WITH FORKS TO UNLOAD DYNO (900 LBS). NORMALLY DYNO IS POWDER COATED A MEDIUM SILVER, MAINLY BECAUSE MY POWDER COATER DOES BEST BUY SHELVING ALL THE TIME AND THAT IS THE FASTEST IN & OUT OF THERE PLACE. THIS DATA SYSTEM WILL WORK WITH ANY WINDOWS PROGRAM, 95′ TO VISTA. IT DOES NEED A 9 PIN SERIAL PORT OR WITH NEWER COMPUTERS WE USE A USB TO SERIAL PORT ADAPTER ($40.00). THE S.A.E. WEATHER CORRECTION CAN ALSO BE DONE THRU THE COMPUTER THRU USB PORT ALSO. THIS IS THE SIMPLEST DYNO I BUILD. WE HAVE 108 DYNOS IN 27 STATES IN THE U.S. AND ALSO MANY FLYWHEELS AND DATA SYSTEMS CUSTOMERS I ALSO TAKE CARE OF. SEE MY BLOG FOR COMPLETE INFORMATION WWW.HEWITTSINERTIADYNOS.WORDPRESS.COM . THERE IS A LOT MORE PICTURES AND INFORMATION THERE THAT WILL HELP YOU WITH QUESTIONS OR CALL ME AT 1-641-775-3395 OR CELL 1-641-512-3395. I WILL NEED YOUR ZIP CODE TO ESTIMATE FREIGHT???????? THIS BID IS FOR THIS BASIC CLUTCH DYNO. IF YOU WANT ANY OPTIONS LIKE LARGER FLYWHEEL, DIFFERENT DATA SYSTEM, ETC. WE WILL HAVE TO ADJUST PRICE AFTER SALE OF THIS DYNO. THIS DYNO IS FOR ENGINES FROM 5 HP UP TO ABOUT 25 TO 30 HP. DIMENSIONS OF THIS DYNO ARE 36″ X 36″. I CAN HELP YOU WITH DYNO ROOM BASICS BLUEPRINTS OR SPECS. NORMAL PRICE FOR THIS DYNO IS $4100.00 PLUS MY COST OF FREIGHT TO SHIP IT. E-MAIL ME FOR FREIGHT ESTIMATE, HEWITTDYNO@GMAIL.COM OR HEWITTS@NETINS.NET. YOU WILL NEED TO SUPPLY INTERNATIONAL ANGLE OR FLAT MOTOR MOUNT AND COMPLETE COMPUTER SYSTEM. WIRING IN SHOP MUST BE GROUNDED AND I RECCOMEND A SURGE PROTECTOR.

THANKS-STAN HEWITT

AFTER MONEY IS RECEIVED, EXPECT TWO TO THREE WEEKS BEFORE DYNO WILL ARRVIE AT YOUR PLACE. THIS IS A CUSTOM BUILD DYNO AND THERE ARE MANY PARTS OF THE DYNO THAT CAN BE CHANGED AND/OR MODIFIED FOR YOUR APPLICATION, SO WE WILL BUILD TO YOUR SPECS.

Hewitt Inertia Dyno – 2001 TO 2009 “PRO” SERIES DYNO

ambush — Mon, 09 Feb 2009 17:37:17 +0000

2001 TO 2009 “PRO” SERIES DYNO

This is the number #1 selling dyno for me. The “new” 2009 models have a new synchronous belt drive system that has almost totally eliminated belt breakage. With the old 30mm belt drive, a customer could break two to three belts a month with heavy use.

The new system uses a wider Kevlar belt with larger pulleys both top & bottom.

The “new” electric start system also has been improved. We’ve went to larger battery cables. We’ve also went to a starter relay system so the starter gets more voltage and amperage. Cranking speeds have gone up 20 to 25 percent. This helps start the engine quicker. No more fast starts or clicks of the starter with the dyno turning over.

This dyno comes standard with a 25 hp flywheel. Many of you want a 30 hp flywheel for the animal Ltds & some over engines coming into popularity. The longer the dyno pull in time (seconds), the more accuracy. This dyno comes standard with a torsion shock system and a 75 hp one-way sprag clutch. An optional 100 hp sprag clutch is an available for a small optional price. We do offer another dyno with flywheels up to 49 hp that can use a one-way sprag clutch. The reason we’re going to a different flywheel is to save you money in freight costs!

The pictures highlight some of the most common used options.

This dyno normally comes with one-way sprag clutch or can be bought for about $717.00 less without sprag clutch & torsion shock system. So this dyno would be electric start direct drive.

Kart Engine Dyno – Inertia Dyno

ambush — Tue, 06 Jan 2009 19:32:03 +0000

THIS IS OUR #1 SELLING DYNO. 2001-2009 “PRO” SERIES DYNO- this dyno comes with new USB Pro data system. This dyno measures 27 ½” x 48” so it will fit thru a 28” door of your dyno room. . It has the new electric start system and the new 35mm belt drive. It comes with a small parts kit to get you started. This dyno has two separate axles and can have a sprag clutch or can be built direct drive. Normally this is bought will a pro type data system and sold with a complete computer system with printer, surge protector, all cables, etc. We would need zip code for freight estimate. We also should talk about what you want for computer system (laptop, desktop, printer, etc.) –

$7999.00 – call me and I can give you all the details

or I can make one specifically for your needs.

~ Stan

c 641.512.3395

Chinese Clone Motor on Gas‏ – Engine Dyno

ambush — Tue, 02 Dec 2008 18:34:47 +0000

Here’s a dyno pull comparasion of a Chinese yellow clone motor on gas. We started with a stock engine with a stock muffler, put in 16 oz. of 10w30 oil and did a couple of dyno pulls. Engine ran very bad, sounded like a bad spark plug. As you can see by the lower dyno pull engine surged very bad due to very lean condition. Made 4.6 hp at maximum at 3000 rpm. First thing we did was remove stock muffler and replace it with a small header we got from ARC. Really didn’t help much, engine still very lean. Drilled main jet out to .037″ and dyno again. Engine souded very strong and made big jump in horepower. We then tryed Animal springs instead of stock springs. Really didn’t do anything, in fact lost hp on top end. Went back to stock springs and stuck on large RLV header. Made a pretty good jump in hp. Ended up with large RLV header and .036″ jet. I don’t think this header will be legal for the rules that I skimmed thru very quickly but just for your infomation. I think the small header from ARC ran best with a .035″ jet. I know A.R.C. & J.C. Specialtys both have parts for these.
About 5400, this motor really fill off. A couple of people have told me spring pressures will make a big difference but they will not be legal!
The dyno sheet show a comparision of a bone stock engine with how we ended up with all stock parts except for jet change. Tightening valve lash settings didn’t make much differance. Ended up gogin back to .003″. Max torque was at 3600 rpm, peak hp at 4900 after jet change.

Interested in Purchasing a Hewitt Inertia Dyno?

Call me today…

Stan Hewitt
c 641-512-3395
hewittdyno@gmail.com
twitter.com/InertiaDyno

High Horsepower Dyno – Hewitt Inertia Dyno

ambush — Mon, 10 Nov 2008 05:00:03 +0000

This is a dyno for someone who wants to dyno engines from 4 hp up to 100 or more. It uses just a simple mechanical coupler to add one or more of the flywheels. I have four of these dynos in the U.S. We normally install a larger axle to eliminate axle flex of the higher horsepower engines. This machine also had a electrically controlled hydraulic system which could be controlled out side of the dyno room to heat the engine head temp up to 300 degrees or more. All data systems come with a S.A.E. weather correction system. Most customers order head temperature and some use a exhaust sensor in the crankcase oil to make sure engine is up to temp. Air/fuel ratio is now available as an option. Questions? Want to purchase? Call me…

Torque & Horsepower in Relation to Engine RPM

ambush — Fri, 07 Nov 2008 18:30:37 +0000

Here’s a multiple dyno graph overlay that includes torque & horsepower in relation to engine rpm. You can compare up to 6 graphs at a time, click on any part of the graphs to compare horsepower or torque at an exact rpm and see that number in 1/100ths of an increment on the right side. This also works when dynoing clutchs. Do a graph overlay and compare in time to see which clutch locks up first with the least amount of slippage. Very handy when testing and comparing headers, cams, pipes, clutches, etc. or any internal or external part that affects horsepower or power to the ground.

At what RPM does your enginge run best? My dyno will tell you…

ambush — Fri, 07 Nov 2008 18:20:13 +0000

Here’s a typical 5 hp Briggs engine shown on a acceleration report. The third column is what I like to use, “Corr Time Diff”. Looking on the far left column under engine RPM it shows to go from 4500 to 4575, it takes .271 of a second to accelerate through that time window. This is a bad example because this is a very tired motor but you’ll see that it surges up & down in time as it accelerates. Then at 5775 to 5850, it just drops off drasticly. If this were a race motor, it’s where you’d want to see maximum engine rpm. This is my test motor for testing new dynos and it’s very tired.

The forth column is very handy too. If a customer has three motors and he knows that at a certain race track he turns the motor say 4500 to 6500. He can dyno all three motors and see which one has the lowest “Corr Total Time”, the forth column. That engine acelererates thru that engine rpm range (4500 to 6450) the quickest.

Sling Shot Inertia Dyno – Hewitt Inertia Dyno’s

ambush — Fri, 07 Nov 2008 12:33:15 +0000

Used on v-twin briggs engines on dirt type race cars. We made a quick change #40 chain two piece split sprocket so he can change from 3-to-1 or 4-to-1 ratio. This engine has electric start so he just hooks up battery, starts engine, turns on the data system and hits the gas. This dyno is accurate to 1/10th of a horsepower & also is a clutch dyno. Measures engagement rpm, slippage ratio and also measures where total lock-up of clutch occurs. Interested in a Sling Shot? Give me a ring. Stan

My Number 1 Selling Dyno – Hewitt Inertia Dyno’s

ambush — Mon, 15 Sep 2008 20:56:56 +0000

THIS IS THE #1 SELLING DYNO. 2001-2008 “PRO” SERIES DYNO- this dyno comes with new USB Pro data system. This dyno measures 27 ½” x 48” so it will fit thru a 28” door of your dyno room. . It has the new electric start system and the new 35mm belt drive. It comes with a small parts kit to get you started. This dyno has two separate axles and can have a sprag clutch or can be built direct drive. Normally this is bought will a pro type data system and sold with a complete computer system with printer, surge protector, all cables, etc. We would need zip code for freight estimate. We also should talk about what you want for computer system (laptop, desktop, printer, etc.) – $7816.00 – call me and I can give you all the details or I can make one specifically for your needs. ~ Stan c 641.512.3395

Hewitt Inertia Dyno’s 2008 – Pricing & Specifications

ambush — Mon, 15 Sep 2008 13:36:49 +0000

HEWITT RACING & MFG.

PHONE 1-641-775-3395

CELL 1-641-512-3395

FAX 1-641-775-3399

E-MAIL click here

THE COMMON DYNOS & OPTIONS WE HAVE AVAILABLE AT HEWITT INERTIA DYNOS ARE NUMBERED BELOW.

**NOTE THAT ALL DYNOS CAN BE UPDATED TO LARGER FLYWHEELS AND SEVERAL DATA SYSTEM OPTIONS! ALL QUOTES WILL BE E-MAILED OR FAXED DIRECTLY TO YOU SO YOU KNOW EXACTLY WHAT YOU’RE COST IS, INCLUDING FREIGHT!( I WILL NEED YOUR ZIP CODE FOR FREIGHT ESTIMATES WITH PRICES SUBJECT TO CHANGE due to STEEL PRICES GOING UP.)

**ALL THE FOLLOWING CAN BE MODIFIELD & CUSTOMIZED TO FIT YOUR NEEDS. WE HAVE BUILT DYNOS FOR QUARTER MIDGET RACERS WITH 6 TO 1 GEAR BOXES AND ELECTRIC START FOR GOLF CARTS WITH CLOCKWISE & COUNTERSLOCKWISE ENGINES. WE ARE ALSO WORKING ON AN ELECTRIC CLUTCH DYNO. WE CAN ALSO HELP YOU WITH A BASIC DYNO ROOM IF YOU HAVE QUESTIONS.

(1) STARTER RELAY UPDATE KIT-($43.87) this is for customers that have my dyno with electric start or customers that are putting electric start on their dynos. It includes a wiring harness with (2) relays, a heavy duty fuse link with 30 amp fuse. We’ve found out the solenoid is not getting enough amps when we have a 25 to 30 foot of wiring to the starter. This stops those false starts were solenoid doesn’t engage or were starter seems to crank real slow at first. We are using 2 gauge cables now.

(2) DIRECT DRIVE KIT TO REPLACE ONE-WAY SPRAG & TORSION SHOCK KIT-($106.24) – we have found out the one-way sprag disengages and engages at high engine rpm. By replacing it with a solid shaft and leaving the torsion shock bushing in, we have extremely repeatable results. Five dyno pulls with only 2/100ths of a horsepower difference.

(3) 1 ¼” ROUND TO 1 3/8”-6 SPLINE ADAPTER KIT ($165.24)-This converts 1 ¼” round shaft with ¼” keyway to one-way sprag clutch and than to a adapter to adapt it to another 1 ¼” shaft. Were you wanted to put a one-way sprag clutch between your flywheel and you main dyno axle.

(4) 2008 ELECTRIC START COMPLETE KIT-($680.70)-We’ve made some changes, installed a relay kit so solenoid and starter engage better with more amps and installed 2 gauge battery cables. These two changes make starter system crank about 20 to 25% faster. This may help some of you that break belts on the Animal motors. Crank the engine up to a highest flywheel R.P.M. before opening throttle and letting up on ignition switch. This will minimize belt breakage. The “NEW” 2008 belt system helps tremendously!

(5) “NEW” 2008 35MM BELT DRIVE-($1251.28)-This comes with two belts-This is a larger sprocket on the main dyno axle and a larger driver with more teeth engaged on the engine. This new belt system almost totally eliminates belt breakage, even on animals. The price can be discounted some when used with other combinations or previous customers wanting to update? We also have a slightly smaller sprocket for customers wanting to dyno very low horsepower engines. Call me with Questions?

(6) DATA ACQUISITION SYSTEMS-There is a Pro system available right now that connects by USB cable. The Pro system has (4) analog channels (example: head & exhaust temp) and with internal S.A.E. weather correction. We normally set it up with two leads, head & exhaust temp, with Pro software, this package sells for about $1399.99. The new mini USB system will have two channels for temp, and have internal S.A.E. weather correction and premium flywheel sensor. This is supposed to be sold at a much lower price. I always recommend “Pro” software which allows up to 6 graph overlays and columns of data side by side up to five columns. You will be able to see acceleration in 50, 75, & 100 rpm increments. By improving acceleration, you will greatly help your customer’s race engines by widening their power band. You will always be able to dyno clutches, see slippage ratio, engagement rpm, and see were total lock-up of the clutch occurs. We can always fax or e-mail you a quote. Training by phone is available and I’m always am available for questions for my customers.

(7) 14 OZ VIPER LUBE GREASE-($12.75) For Sprag clutch and Pillow Block bearings- grease pillow block bearings at slowest time of the year. This will cause your horsepower to drop slightly for a short time. This is synthetic grease so it is thin in viscosity and not affected as much by temperature.

(8) KIT CLUTCH DYNO, 25 HP FLYWHEEL-$2629.99-You do all the mig welding. I recommend a 175 amp welder with .030” wire or larger. Many of the smaller parts are ready to assemble and many are already welded. This includes a completely assembled balanced flywheel assembly with every part to make a 36” x 36” engine/clutch dyno. You supply #35 chain, motor mount, and computer system, clutch (Premier Titan recommended), surge protector. Wiring in shop must be grounded. I do have some used digital weather stations for manual S.AE. weather correction. Used original data systems with one channel of head temperature, included, cost about $549.99, which includes premium axle sensor and new 14mm head temperature sensor. Will work on Windows 95 to Vista. Does include newest most up to date software. You can ship me your computer for complete installation of software and set-up and testing. Or we can do over the phone which can take over two hours for installation and training. Call with zip code for freight estimate. Freight is with 62% discount. Residential freight will cost $50.00 more. Best if you can find someone with forklift or dock.

(9) 2008 BASIC CLUTCH TYPE DYNO-($3838.00)-This is priced with a used data system. We can price with a new system when they are available. This price includes a 25 hp balanced flywheel with premium NTN pillow block bearings along with a heavy duty sprocket hub and #53 tooth sprocket so you can dyno clutches. It includes a 36” x 36” table with 1 ¼” stress-proof axle, motor mount rails, side panels and one end panel. Powder coated medium silver or chrome yellow. If you do not want powder coating-deduct $150.00. You would need to supply international (wide) motor mount with wings, basic computer with color printer. The recommended clutch is a Premier Titan with yellow springs ($150.00). I can supply a complete computer system ($599.99 to 699.99) and install software and set-up and test. Optional 29 hp flywheel-add $80.00. This does include a small parts kit to make sure you have everything to get started. This dyno can be updated to electric start and belt drive? For applications above 30 hp ,see 40mm dyno.

(10) Buy this dyno (above) as a P.A.K. (PARTIALLY ASSEMBLED KIT) ($3099.99) were we weld the main table and install assembled balanced flywheel, build the brake bracket, tack motor mount rails, and you do all the rest of the work. Will require some light welding. This will not be powder coated! Call with any Questions?

(11) 2008 ONE-WAY SPRAG CLUTCH DYNO-($4250.00) This is the same dyno as above #8 except with a large torsion shock bushing, (2) couplers, and a one-way sprag clutch assembly with axle adapter. If you hear an engine pulling down (forgot to put oil in it) like it’s about to lock up, you can let up on throttle and motor will stop and flywheel will coast till you hit the brake system. One-way sprag needs to be greased about once a month. Sprag can be locked up so you can dyno clutches! This price will be with used original data system with head temp sensor. S.A.E. weather correction would be done manually. Again, you will have to talk to me about what data system and options you want. I always quote everything on paper and e-mail or fax you the quote. You will need a Premier clutch with yellow springs, a motor mount, and a basic computer system with color printer. This does includes small parts kit to get you started. This dyno as a P.A.K. dyno ($3549.99). Call with questions? This will be made so electric start & belt drive can be added at a later date.

(12) 2008 40MM CLUTCH DYNO-($4575.00)-The standard flywheel for this dyno is 34 horsepower but you can get optional ones up to 44 horsepower or higher. This is for the higher horsepower 2-cycle or 4-cycle engine. Once you get to a certain horsepower, you can experience axle flex which makes the chains pop off more often. Since getting a 1 ½” or 1 ¾” sprocket hub is almost impossible. It’s better to go with the 40mm axle and sprocket hubs. This dyno does include two 40mm sprockets hubs and I’m sure you could install an axle clutch and another set of motor mount rails if you want to dyno right and left hand motors. You would be able to dyno clutches on the high horsepower 2-cycles or 4 strokes. This dyno can also be made into a multiple flywheel dyno were we make it possible to join (3 or more) 34 horsepower flywheel for things like shifter karts, etc. This would be a custom quote. We have 4 of those type dynos in the U.S. already. Again, this is priced with a used original data system with head temp & sensor. S.A.E. weather correction could be done manually with digital weather station which is built into price or thru computer. We can quote it to you with a used, a pro type system or the new mini USB system which should be available Sept, 2008 Call with questions? It’s best if we talk by phone and determine exactly what you want and I give you an exact quote. Call with zip code for freight quote?

(13) 2008 25 H.P. FLYWHEEL WITH SPRAG, ELECTRIC START & NEW 35MM BELT DRIVE-($7246.00)-This is becoming the #2 seller for small engine builders! This dyno has standard a 25 hp flywheel, 2008 electric start, the new 2008 35mm belt drive and includes a one-way sprag clutch. This does include the New USB Pro data system. S.A.E. weather correction can be done by computer with new style data system. It also includes a small parts kit. This dyno is more for the serious engine builder. Optional larger flywheels’ can be installed for their additional price. You will be able to dyno clutches on this dyno. I can supply a computer system (laptop or desktop, optional price) for you along with a printer. You will need a surge protector and wiring in shop must be grounded. You will need to supply an international motor mount and top post battery for electric start and need a 10 to 20 amp battery charger.

(14) 2008 36” PRO DYNO WITH 25 HP FLYWHEEL,DIRECT DRIVE, ELECTRIC START, 35MM BELT DRIVE,2008 USB PRO DATA SYSTEM –($6515.00)-This is my favorite dyno; it’s simple and super accurate! You supply motor mount and battery. You can buy a laptop or desktop from me ($599.99 to $749.99) and have software installed and set-up and test with your dyno. That way when you get it, in about two hours you’ll be dynoing motors. Or we can use your computer system. Get a basic inkjet printer, USB cable & surge protector and your set. You supply motor mount and top post battery with 10 to 20 amp charger.

(15) THIS IS THE #1 SELLING DYNO. 2001-2008 “PRO” SERIES DYNO-($7816.00) this dyno comes with new USB Pro data system. This dyno measures 27 ½” x 48” so it will fit thru a 28” door of your dyno room. . It has the new electric start system and the new 35mm belt drive. It comes with a small parts kit to get you started. This dyno has two separate axles and can have a sprag clutch or can be built direct drive. Normally this is bought will a pro type data system and sold with a complete computer system with printer, surge protector, all cables, etc. We would need zip code for freight estimate. We also should talk about what you want for computer system (laptop, desktop, printer, etc.)

(16) ELECTRIC CLUTCH DYNO-MADE FOR ¾” AND 1” PTO SHAFT ENGINES.-WILL USE 110 VOLT 2 HP MOTOR OR 220V 5 HP MOTOR-Will have its own MCP brake system and own data system. Will dyno all clutches with #35 or #219 chain. Their may be two versions, (1) cheap basic and (1) pro version with belt drive instead of chain in one area. Will have its own flywheel. Will be fully welded and powder coated. I’m hoping I can take it apart and ship UPS so I can save you money on freight to get it to you. You will need computer with windows 95 or newer.