The piston seems very tight in the cylinder as well. 0000022863 00000 n .Pm]T1 0000122621 00000 n With new features and better performance, the new GX engines establish themselves yet again as one of the best engines in the business. Exhaust is key for making torque.a longer tube and a small amount of backpressure (a muffler) usually does the trick on most gas NA engines. Hope this helps. NM is newton Meter, the formula does not change. 0000008105 00000 n We run almost standard 390cc Honda engines with 2mm skimmed heads and advancing the timing key by 2mm. 0000048973 00000 n Hub. Hope some one can help. JavaScript is disabled. The cost was just too much for me to justify though. The engine is revving to 14,000 rpm in your calculations above. The Fora platform includes forum software by XenForo, VerticalScope Inc., 111 Peter Street, Suite 901, Toronto, Ontario, M5V 2H1, Canada. 0000008401 00000 n Oil Drain Valve (AM) Honda Oil (OEM) 10W30 / 5W30 . Model. Model Series: Intake Valve Clearance: Exhaust Valve Clearance: GX640: 0.10-0.14mm ( 0.004-0.006in ) 0.18-0.22mm ( 0.007-0.009in ) GX100: 0.15 +/- 0.04mm Fastener Type Torque Spec Main cap bolts 95-105 ft-lbs Connecting rod bolts 40-45 ft-lbs. 0000004405 00000 n Cam bolts 40-45 ft-lbs. 5,500 feet, plus some maybe, is getting up there. Still, without the RPM numbers, your information, as good as it is, isn't of much value. It's torque peak is almost 20 lbs ft! You must log in or register to reply here. net torque). 0000001756 00000 n %PDF-1.4 % The intake manifold nuts and bolts are torqued to 16 ft. lbs. Portable hydraulic power units, stump grinders, generators, trash pumps, pressure washers and small specialized farm equipment tasks are easily handled by the Honda GX390. 0000053235 00000 n 0000007923 00000 n The original poster can confirm if those torque figures are with a reduction, but considering a gx390 usually makes about 25 Nm I would say it is. 0000026424 00000 n 1 5/16" muffler fits. This Honda small motor is built with quality components and is ready to outlast the competition. Oil pump bolts 23-28 ft-lbs. At what RPM are you taking your readings? 0000081984 00000 n 0000003565 00000 n Some porting of the head in the exhaust port (and intake) to relieve sharp corners and smoothing of any casting flaws helps for sure. You never learn anything until you admit you don't know it all some times the man in my mirror isn't so smart Hey Restorob, I didn't get a PM from you. $2,147.00. at cont. 0000027158 00000 n I guess I need to hone it more, I just don't want to "bore" the cylinder any with the hone. So are experiencing a lack of on track performance? 0000000016 00000 n 0000184742 00000 n 0000002883 00000 n A IGNITION COIL AIR GAP . OEM Honda Part No: 12391-ZE2-020. my gx390 just put a arc rod and the vegas carts torque cam in it. Std Torque ( N-m ) Std Torque ( ft-lb ) Screw: 3: 1: 0.7: Screw: 5: 4: 2.9: Screw: 6: 9 : 6.5 : Bolt and nut: 5 : 5 : 3.6 : Bolt and nut: 6 : 10 : 7 : Bolt and nut: 8 : 21 : 15 : Bolt and nut: 10 : 34 : 25 : Bolt and nut: 12 : 54 : 40 : Flange bolt + nut: 5 : 5.5 : Flange bolt + nut: 6 : 12 : 9 : Flange bolt + nut: 8 : 26 : 20 : Flange bolt + nut: 10 : 39 : 29 0000014064 00000 n 0000259411 00000 n as follows; Rod torque, 8.7-11.5 Ft-lb. xb``pc``d```~ _mu+7^~. I don't know what happened but can you post the message here instead? Workplace Enterprise Fintech China Policy Newsletters Braintrust martin 2022 Events Careers angry birds 2 promo codes 2022 reddit OLD vs NEW You can clearly see what it does to the torque curve. 0000006535 00000 n If you want to get a bit deeper into the engine you could look into moving the camshaft timing around a bit, maybe advance it a couple of degrees? so yeah And yes, most of that comes from the variable timing; 0000026746 00000 n 0000017780 00000 n hmm. 0000026161 00000 n Thanks newz7151. Torque values (mm) N-m kgf-m lbs-ft Crankcase cover bolt M8 x 1.25 24 2.4 18 Cylinder head bolt M8 x 1.25 24 2.4 18 Engine oil drain plug bolt M10 x 1.25 18 1.8 13 Connecting rod bolt M6 x 1.0 10 1.0 7 Rocker arm pivot bolt M8 x 1.25 (Special bolt) 24 2.4 18 0000004720 00000 n CRANKCASE COVER, CRANKSHAFT, PISTON GX340GX390K1/R1/T1/U1/UT1 Engine Assembly Information PISTON CRANKSHAFT/BALANCER/PISTON EXHAUST VALVE REMOVAL/INSTALLATION . My bore is dead on then. The crankshaft is 3/4in, and the mounting flange is a universal standard. trailer Nice. 0000206224 00000 n 0000124389 00000 n Most typical "racing" mods will shift the torque up in the rpm increasing your HP, your aim is to produce a torque curve that makes a flat 24 hp without going over your torque limit, ie extending your usable range of power. Ultimate Karting. PWP_3bJJes6DMh442@58 S#i7F00@8lp&@8kZi-t' 3F endstream endobj 353 0 obj <>stream Anyways.. even down @2000 rpm retarded timing provides 25Nm (on the new GX390 that is) (compared to the 23.4 Nm of the older versions) so fair to say almost 10% torque increase in the lower rpm band. 0000002126 00000 n World Formula premier clutch with motorbike type chain. start optional) Fuel tank capacity 6.1 Liter Fuel cons. Nominal bore, Standard is 3.228" with a service limit of 3.235". 351C, 351M Torque Spec. Honda cylinders are some of the hardest I've seen so I don't believe you will get into in too quickly. 0000001306 00000 n OK, Specs. In this video, we replace the cylinder head on a Honda GX390 engine on a 4000 PSI pressure washer. Quick Summary. Features Specifications Please select a model from the drop-down (s) below to view the specifications. 0000000916 00000 n 0000132919 00000 n Mass production engines may vary from this value.Actual power . GX390 13HP Honda 1" Shaft Engine -TO $649.00 $75.00 shipping or Best Offer Ignition Coil Spark Plug F7TC Honda GX240 GX270 GX340 GX390 8/9/11/13HP Engines $14.95 Was: $16.99 New Muffler Fits Honda GX390 GENERATOR Engines 13HP $62.95 GX340 GX390 Recoil Carburetor Ignition Coil Spark Plug Air Filter For Honda 13HP $39.99 Free shipping I would try take timing out and add compression like you suggested, the theory here is that without timing the engine will fall over a bit at higher rpm and keep your HP number down but the extra compression might help the midrange? Got new parts. Max. in) single-cylinder air-coolled 4-stroke internal combustion small gasoline engine with horizontal shaft, manufactured by Honda Motor for general-purpose applications. General information Dimensions and Weight Cylinder Block and Head Parts lookup for Honda Engines power equipment is simpler than ever. start optional) Fuel tank capacity 6.1 Liter Fuel cons. You are using an out of date browser. hbbbd`b``3 C7> L endstream endobj 350 0 obj <>/Metadata 6 0 R/Pages 5 0 R/StructTreeRoot 8 0 R/Type/Catalog/ViewerPreferences<>>> endobj 351 0 obj <>/Font<>/ProcSet[/PDF/Text]>>/Rotate 0/StructParents 0/TrimBox[0.0 0.0 595.276 841.89]/Type/Page>> endobj 352 0 obj <>stream DJ-3114 GX270-GX390 Dyno 275 WLC Cam. Cam thrust plate bolts 8-10 ft-lbs. 0000008200 00000 n For a better experience, please enable JavaScript in your browser before proceeding. 0000193663 00000 n Pd,) ;.gZdcpj3wZ8N9RJf>3he f,g2BPL|> Somebody walked off with my 390 manual. 0000133272 00000 n 0000042345 00000 n TI_HONDA_GX100_CAM_PULLEY_R&R 2 04/08/2013 Technical Information Valve adju Valve adjusting lock nut Cam pulley 6.8 x 1.9mm HONDA GX100 CAM PULLEY sting screw Torque spec: 7.5 N-m (0.75 kgf-m, 5.4 ft lb) Exhaust rocker arm Head cover Rocker arm shaft Intake rocker arm Timing belt Cam pulley shaft Cam pulley shaft O-ring Do not reuse 794572 Briggs & Stratton OEM 793224 791888 699109 698445 31E777 Carburetor Assy 69.98 25.95. Denver is above 5,000 feet. 0921. I know the GX390 that i have is from an old pressure washer, ill have to grab the model and see. It will not waste your time. . For a better experience, please enable JavaScript in your browser before proceeding. 0000015765 00000 n I've been told never to use an old piston, while other say it doesn't matter if the old one isn't worn. Sorry for you spending all that time just for me. 0000239865 00000 n Yeah, I did give you 340 specs. He never mentioned any RPM numbers. 0000019777 00000 n 0000193326 00000 n Rod to crank pin clearance, Oil clearance is 0.0016-0.0026 " with service limit of 0.005", Crankpin standard is 1.4167" with a service limit of 1.415". ?P9{J?9.qZ{7q#vgmT& )H U5q(u6LFi8 7.0 kW ( 9.4 HP ) / 3600 rpm Max. Also, do you think I should install a new piston even though my bore measure dead on standard and my piston skirts don't look worn? Carburetion re-jetting is crucial when pretty much any engine mod is made. It is a slip together kit that you weld. 0000206617 00000 n >sJP,$Ad&L\m *23*8 0000258383 00000 n Complete exploded views of all the major manufacturers. It has a bore and stroke of 88.0 mm x 64.0 mm. It may not display this or other websites correctly. Other than what the dyno has said, are there any issues? "GJZZEnWwgJI:Oe`L$#{Z oS,>-fbv[.A& xQOWpDhk7uM\Yfv{mP~shbxdIE:*;rt5 zw7RO&xjIrCK48 ?$'sI20K:. %PDF-1.4 % 0000003698 00000 n 0000004360 00000 n Available for other motors, too! 0000124013 00000 n Engines according to our dyno are not allowed to produce more than 24hsp and 49nm of torque. Torque (ft-lbs) Connecting rod bolt: M7 x 1.0: 9: Cylinder head bolt: M8 x 1.25: 17: Flywheel nut (special nut) M14 x 1.5: 54: Rocker arm pivot lock nut (special nut) M6 x 0.5: 7: Rocker arm pivot bolt: M8 x 1.25: 17: Crankcase cover bolt: M8 x 1.25: 17: Muffler mounting nuts: M8 x 1.25: 17: When installing aftermarket parts use manufacturer's torque values Rewind Starter (AM) GX340 - GX620 . Honda's GX390-QA2 is a lightweight engine that offers a cooler, more fuel-efficient operation. Thanks so much for your help. <<46D8B01021851E47BE121162D4D60465>]>> The GX340 is a small four-stroke gas engine offering superior performance and reliability. $2,086.00. net torque 26.5 Nm ( 2.7 kgfm ) / 2500 rpm Ignition system Digital CDI with variable ignition timing Starter Recoil (el. Engine has no Honda numbers. rated power 3.5 L/h - 3600 rpm Engine oil capacity 1.1 Liter Dimensions (L x W x H) 409 x 484 x 448 mm Dry weight 37.0 kg So standard keyway, mount threads and crank bolt . 0000001450 00000 n 0000001123 00000 n 0000007810 00000 n 0000052483 00000 n Rewind Starter (OEM) GX160 - GX390 . All Power American Steele Gentron Generator Carburetor JF390-I-04B . Majority of the engines are sealed between 23.5hsp and 23.9hsp with torque of between 47 and 48nm. GX390QNR. Aftermarket Part No: 50-431. 0000002049 00000 n Easy with car engines not so much with I/C single cyl engines. Another way to go about it if your looking for low end grunt is remove the Gov and go with lower gearing, you will get a lot better low end pull and without the Gov retain or gain some top end speed from the higher rpm, just depends on what you want and how you set it up. Purchase today from Northern Hydraulics or call for more info. The ones I used were just for demonstration, to show how much HP the engine would be making if his torque number was at those RPM points. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, and more! 0000002385 00000 n Grant, I would talk to the guys at Vegas Carts and ask them for suggestions. 0000184414 00000 n 0000003372 00000 n Ive never seen bolts included in the box of a predator. Click here to view our online manual Download Product Flyer Data Specifications are subject to change at any time without prior notice. 0000121819 00000 n 6 73 0000004675 00000 n It must be VERY hard. {5#rssb~/Z%>w%>JD]G/bzWRLb?9\M]S7'F6$kUjERiz3A)sxZ>~f give a positive response me, the e-book will unquestionably sky you additional issue to read. net torque 26.5 Nm ( 2.7 kgfm ) / 2500 rpm Ignition system Digital CDI with variable ignition timing Starter Recoil (el. JavaScript is disabled. lb) of torque at 2,500 rpm. This is the official service website for Honda, Power Products, Marine, General Purpose Engine & DC Power unit, GX390. My point is your calculating his power with engine rpm and torque at the output shaft after the 2:1. 0000239426 00000 n Pressure washers Commercial lawn and garden equipment Tillers/cultivators Ad on Ebay says 99 % of parts you can buy from Honda. 0000004810 00000 n Intake manifold bolts 23-25 ft-lbs. Best of Machinery have put this Honda GX390 Pressure Washer review & buyers guide together to give potential buyers more insight into its strengths, flaws . I bet my bore value is dead on since it only varies .001" over the entire cylinder. Down side with small ports is you kill upper rpm power. at cont. Need to know what to tork head bolts to, also connecting rod tork. GX390; Engine Type: Air-cooled 4-stroke OHV: Air-cooled 4-stroke OHV: Bore x Stroke: 88 X 64 mm: 88 X 64 mm: Displacement: . $265.00 Add to Cart Compare Quick view ARC | sku: 6607-GX3 . Thanks for any help. I truly appreciate it. Max. GX390 The powerful Honda GX390 is ideal for applications that include agricultural equipment, air compressors, concrete saws, self-propelled lawnmowers, pressure washers, trenchers, and a variety of construction equipment. 0000158625 00000 n Xc6 8zB\@L 4DP$|o;\p>`t; bb $4ceXc[G0.htY u^, B,iT$D`XZF/@ ^ca300 3K Thanks for your help, it is very appreciated. 0000258893 00000 n Honda specs, its something close to that from memory. The main feature of this design is the steel crankshaft hub that allows for timing changes at 2 increments. 0000004855 00000 n . 0000004765 00000 n Are you positive on that nominal bore value? Will you read my last comments on honing the cylinder and make comments/suggestions? Fits a Honda GX390 13 HP or Duramax 16 HP. 0000004900 00000 n 0000004315 00000 n I've seen this done before at the machine shop so I did it the same: Put a light coat of transmission fluid in the cylinder for lubrication then run the hone up and down gently while twisting it with a conventional drill. 0000004630 00000 n iGX390QZNR. . Insert the thickness gauge of proper thickness between the ignition coil and flywheel. The GX390 features more power, quieter performance, lower fuel consumption, and lower emissions than the previous version. _*lx#KO=\Q uBMxlV 0000233571 00000 n 0000236258 00000 n 0000052738 00000 n at cont. 0000002306 00000 n It is a 389cc, 11.7 HP and 3600 RPM. 349 0 obj <> endobj xref 349 31 0000000016 00000 n Hondabond 4 (OEM) Liquid Gasket . Rocker arms 17-23 ft-lbs. 0 0000012128 00000 n Guys the dyno readings might not be 100% correct as I know that with certain dyno's you need to have the correct weighted flywheel to give accurate figures. Where on track are the other motors faster than you? Loosen the ignition coil mounting bolts. Can you get the plot from the dyno so you can get an idea what the torque curve looks like and where you can work on increases without going over the limit? rated power 3.5 L/h - 3600 rpm Engine oil capacity 1.1 Liter Dimensions (L x W x H) 406 x 460 x 448 mm Dry weight 31.7 kg SPARE PARTS Price $80.00. Compression ratio rating is 8.0:1. 0000002860 00000 n I did it a couple of times for about 30-45 seconds, then cleaned it out with a cloth. 0000004450 00000 n 0000004280 00000 n 0921. Absolutely! startxref Brough a 13 hp Pro max on Ebay. Thanks restorob. It looks just like a Honda GX390, 13 hp. 0000130077 00000 n Looks like an increase of 1.5 Newton meters just with that? Would not recommend doing that. Mass production engines may vary from this value. The Honda GX390 is an industrial-style gas-powered pressure washer that provides high pressure, excellent durability and a wide range of movement, giving you an excellent cleaning tool that can deal with almost any surface. HondaLawnParts.com stocks Genuine Honda Engine Parts to keep your GX390 in peak condition. OEM Honda Part No: 14711-ZE3-000. I don't understand why your not getting my PM's :hammerhead: A forum community dedicated to lawn care and landscaping professionals and enthusiasts. I found the best bang for the buck was going with the comet 780 series. The only way to increase HP (a calculation) is to increase the torque, or produce the same amount of torque at a high RPM. HWn7}D+ &NnEENR{=3$u ! Halve the RPM, I'll bet they are running a 2:1 reduction wet clutch. Contents for. 0000003812 00000 n The stone have a spring tension adjustment and I have the spring tension as light as it will go as to not ream the cylinder out. Hello. thing pulls like a mule. The way to make HP or torque gains is to improve the way the engine "breathes". Intake Valve. I hope the numbers you gave me are for a different engine - maybe a GXV340 has this smaller bore? /Wt`./) Qe{c%; Dry Weight 31.5 KG (69 LBS) DIMENSIONS Change country Country. Also curious as to the rod to crank pin clearance. I put it on our schools small engine dyno and it put down 17hp 26tq at 4400rpm. Aftermarket Part No: 36-325. Blew connecting rod, broke bottom of piston. JavaScript is disabled. xref Straight shaft 1" x 2-31/64", 1/4" keyway, Elect Start, 18A Charge, Oil Alert. The cross hatch still doesn't look smooth and consistent and I measured the cylinder and can't tell that I changed the bore at all. endstream endobj 7 0 obj <> endobj 8 0 obj <> endobj 9 0 obj <>/ColorSpace<>/Font<>/ProcSet[/PDF/Text/ImageC/ImageI]/ExtGState<>>> endobj 10 0 obj <> endobj 11 0 obj <> endobj 12 0 obj <> endobj 13 0 obj <> endobj 14 0 obj [/ICCBased 37 0 R] endobj 15 0 obj [/Indexed 14 0 R 255 53 0 R] endobj 16 0 obj [/Indexed 14 0 R 255 55 0 R] endobj 17 0 obj [/Indexed 14 0 R 255 44 0 R] endobj 18 0 obj [/Indexed 14 0 R 228 42 0 R] endobj 19 0 obj [/Indexed 14 0 R 238 46 0 R] endobj 20 0 obj [/Indexed 14 0 R 255 48 0 R] endobj 21 0 obj [/Indexed 14 0 R 255 51 0 R] endobj 22 0 obj [/Indexed 14 0 R 255 57 0 R] endobj 23 0 obj [/Indexed 14 0 R 255 59 0 R] endobj 24 0 obj [/Indexed 14 0 R 255 61 0 R] endobj 25 0 obj [/Indexed 14 0 R 255 64 0 R] endobj 26 0 obj [/Indexed 14 0 R 226 66 0 R] endobj 27 0 obj [/Indexed 14 0 R 228 68 0 R] endobj 28 0 obj [/Indexed 14 0 R 255 38 0 R] endobj 29 0 obj <>stream Compare up to 3 models After comparing the price of all the parts vs getting a new engine with more displacement, I decided against it for now. 0000239640 00000 n It will require an upgraded spring package, billet rod, and billet flywheel. ft) Recheck valve clearance after tightening the rocker arm pivot lock nut. 0000258683 00000 n 0000007114 00000 n It may not display this or other websites correctly. 0000130930 00000 n Net Torque: 19.5 @ 2500 RPM; Crankshaft Diameter: 1" Crankshaft Length: 3-31/64" Crankshaft End Tapped Size: 7/16-20; Crankshaft Keyway Width: 1/4" rated power 3.5 L/h - 3600 rpm Engine oil capacity 1.1 Liter Dimensions (L x W x H) 406 x 460 x 448 mm Dry weight 31.7 kg MENU > General Purpose Engine & DC Power unit > GX390 > Owner's Manual Please select your country. What's your opinion? 0000004495 00000 n It weighs 5.40 lbs. Cylinder head bolts 90-100 ft-lbs. net torque 26.5 Nm ( 2.7 kgfm ) / 2500 rpm Ignition system Digital CDI with variable ignition timing Governor system Electronic Starter Recoil and electric Choke Automatic Fuel tank capacity 6.1 Liter Fuel cons. Ouch yeah sounds like ya jammed a M8x 1.25 fastener into a 5/16 fine thread hole. HAN0}N'` 0000022470 00000 n Mass production engines may vary from this value. Straight shaft 1" x 2-31/64", 1/4" keyway, Elect Start, 10A Charge, Oil Alert. Purchase now to take advantage of our free shipping and quick turnaround time. 0000001872 00000 n one of the best ways I know of for improving low end torque is to raise the compression and use a head with the smallest ports possible. Go Kart Loop for Honda/Predator GX-270/390/420. This part is no longer available and has been replaced by Oregon 50-431. GX390. Head torque, 23.1-27.5 Ft-lb. 0000230870 00000 n This cam is to be used in mild modified applications. trailer <<76564F700D2346119EDF20DC67F08D00>]/Prev 90097/XRefStm 1123>> startxref 0 %%EOF 379 0 obj <>stream Question is, how much? From spring 2010 onwards, Honda producing the updated version of GX390 engines with larger displacement. 0000259191 00000 n Combustion Cleaner (OEM) 385g . local Honda dealer won't help. http://www.vegascarts.com/product-p/gp966comp.htm, http://www.vegascarts.com/category-s/1822.htm. Flywheel / flex-plate bolts 75-85 ft-lbs. I almost bought a bunch of parts, but Vegascarts said that I would need to get the piston milled down a bit and do some minor block clearancing. Does anyone have a book on these engines that you could look this up in? 0000026719 00000 n ,q G '7 0000010327 00000 n Front cover bolts 12-15 ft-lbs. The GX 390 is quiet, smooth and vibration free. 0000051352 00000 n Definitely a custom camshaft would be a great help. When this is the case, it is best practice to start from the center and alternate bolts/nuts while moving outward. On the camshaft, an earlier exhaust valve opening, a longer duration to get more air and fuel in (and exhaust out) and a little more lift would be beneficial. 0000126421 00000 n 0000004757 00000 n 0000238238 00000 n 0000235492 00000 n Golf Cart Kit Honda . SPECIFIC TORQUE VALUES (GX160) Item Thread Dia. Straight shaft 1" x 2-31/64", 1/4" keyway, Oil Alert, Elect Start, 20A Charging, 'Auto-Idle', 'Auto-Choke'.
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