major work o6 FXD3500

[REED]

MIKE THIS IS A FABULOUS SITE I just stumbled upon it the other day and definitely have it posted to my favorites. I am doing major work to my 06 FXD 3500 and need to know a couple of answers. 1 what is the vss frequency for a stock 06 Dyna and what do you think would give me the best combination of sound and power for the exhaust. I am a mechanic by trade although havn't done too much since my racing days in the 70s. Here goes with a summary of things i am douing to my Dyna. Bearing mod to cases, millenium 4.25 bore cyls cp flattop pistons, new heads 2.02 intake and matchjing exhaust valves cnc ported and chambered to deliver 10.5 comp dwith flat tops 4 5/8 stroker crank(jims welded and balanced) gear drive 67g andrews cams roller tappets, doherty mistfree breathers, roller tip 1.7-1 rockers moly pushrods BC gerolamy dual port induction 6.0 gph injectors air cleaner to match, daytona twin tech controller of course cometic gaskets AIM lockup clutch 1 tooth larger front final drive sprocket to lower final drive ratio. Riverra tells me the new carbon fibre belt will handle this I hope the primary and trans will do the same. Lots of othe4r little touches eg spurgin cooler, diamond cut barrels and heads, chrome hardeware etc. Can you think of anything i have missed or have any other suggestions. I have all the parts however have not assembled yet sort of waiting to see if S@S releases the new style cases at the V-twin expo next month. Once again this is a fantastic site I would appreciate any input you can give me and I would be interested in stopping in next summer on my ride down the Pacific coast. Sure would like to see what this puts out on a dyno at sea level. Thanks TOM

Why??? BECAUSE I CAN

[Mike]

Thanks for the kind words. I must admit that I cannot answer your first question. There are several orders of magnitude of frequencies in the exhaust including sonic waves. All these vary depending on operating rpm's, flow charactoristics of the heads (port volumes, etc.), cam timing and even temperatures. No one over the counter exh. will be best at all things, so it is always something of a compromise. Building a system can encompass tons of dyno time trying all the variables until it is what were after. Buell used a supercomputer at a cost of about $10,000.00/hour to design their racing system (so I've been told).
Sounds like your doing a complete job on your build. Only thing that comes to mind are your pushrods. Be sure to use the stiffest stuff you can get, rigidity is more important than weight. Baisley Hi-Performance offers some really good pushrods. We offer an oil prressure regulating spring that increases pressure by 15% to help keep the lifters firmer under your heavier valve springs (part number LMR-002, $12.95ea). Last, get the S&S primary/mainshaft bearing inner race. It is stepped and will not walk on the shaft, common problem with high output motors.
The belts have so far been holding.
Thanks, Mike

[REED]

Thanks Mike, I guess you did't understand what I meant by vss frequency in better terms vehicle speed sensor for the signal to the speedometer, I need to know this for the stock setup so that I can calibrate my ECM to get the correct reading for thye larger front belt pulley in the final drive, extra tooth. Will be using moly pushrods from my supplier, they are excellent products of american mfg. Intake and exhaust ports are 1.8 INches with the injection unit matched to the heads, on the exhaust I like the look of the stock pipes and the sound of my gutted screamin eagle slip ons, do you think this will be too restrictive and perhaps you have some suggestions. Will your oil pump spring work in the 06 dyna pump, if so I will get one from you. Thanks for the info on the bearing i will doublecheck before assemblu but believe it is the S@S bearing that I have. In reading the mail it sounds like you favor the borezilla exhaust for larger displacement engines, havn't seen one here are they extremely noisy? TOM

[Mike]

"Iknew that!?" Seriously, I get off on tangents sometimes. The VSS frequency varies with speed and model. But for test purposes, a domestic 04 FXD model would show 458hz at 20mph, 916/40, 1374/60, 1832/80. H-D no longer uses this test for 05L (likely due to the j1850 serial bus addition) and does not list frequencies for newer models. To correct for changes we like to use the Dakota Digital recalibrater. It can be adjusted on the fly (when mounted to do so) and we've yet to see one fail.

The spring will work with the hydraulic tensioner models. P/N LMR-002, $12.95 each.

I like the Boarzilla's but they are extremely loud. But, they now have a quiet baffle available which sound great and ,so far, has not shown a hp drop vs. the std.

Sounds like a neat build, let me know how it works out!
Thanks, Mike