2005 FLSTCI

[heritage]

Have 95" w/ Andrews 37G,Zipper's 50mm Tbody + manifold,Baisley SuperStock head work,PCIIIUSB,RBRacing LSR 2 TO 1 exhaust.Dynoed last week and results were not impressive.Tuner said pipes were hurting performance and couldn't get AFR right.I realized that these pipes were for drag racing being that they don't have any baffling.I looked over your dyno charts and it looks like the V&H Propipes might be one to consider.Would like your suggestions.Dyno results were 84.4 hp & 88.1 tq @4100rpm.Max air/fuel =17.5

[Mike]

Overall your combo sounds pretty good and I would have predicted more like 105-110hp/tq (STD. 5th gear). If your dyno numbers are SAE, 4th gear they will be lower than those shown on our web site. The 17.5 AFR is too high and may be a clue. It could be that the Power Commander's values are max'd out in some areas. This can be helped with an H-D ECM reflash download. Since the PC modify's the existing ECM cal., a cal. that is closer to the combo gives the PC more latitude for tuning. Better yet would be Race Tuner, it has much more latitude and allows each cylinder to be independantly tuned for better optimization. The 37g cams are really popular these days and we've seen some bikes do very well with them yet others only marginal. However, on paper we would expect them not to do as well as cams with more lift. It may be that these cams are a good match for some heads but not others. We know that the Baisley heads like as much lift as we can comfortably accomadate. The LSR pipe has traditionally been a good performer on Evo's and I would expect at least your peak numbers to be good, but we've not tested them on Twin cams. If we were to start fresh on recomendations, we would suggest Race Tuner, Wood Auto TW8 (or similar, approx. .590 lift) cams, 10.5 compression and D&D Fatcat exhaust with the performance muffler. With your current combo, the V&H would be good but we will need to know your compression ratio (pistons used) and what ECM calibration the PC is working with and finally, have it re-dyno'd. I may be able to give you more info if you fax a copy 503-542-7594, E-mail @ mike.stegmann@teamlatus.com (private) or post on this web site. If you wish, I would be happy to review your dyno chart and talk more about possible options.
Thank You for viewing our web site, Mike

[Mike]

I recieved your fax and there is certainly more of a tune to be had. The numbers are SAE 4th gear (rpm=6.49) so our STD 5th gear runs would be higher. It is enteresting that the low end torque was actually better before the tune. It is not unusual with Power Cmdrs to richen the 1000-2000 area to improve torque and throttle response (the PC USB has an accelerater pump feature that helps). This also helps balance the cylinders since the PC treats both the same (the cylinder offset feature also helps with this). After 2000 your fuel line should be fairly flat at around 12.8-13.3. It may be with the Stg 1 download that the PC values are max'd out and there is no more tune available. The H-D stg 2 high output download would be more appropriate. Are the injectors in the Zippers T-body Stock? If they are not, the PC's ability to control them may be questionable, in this case Race Tuner may be more appropriate. We also know that the Baisley superstock heads really repsond to .550-.600 lift cams. The 37's may be happy with some heads but not fully take advantage of the Baisley heads. We just finished tuning another bike with BHP superstock heads, 37g cams and Bassanni 2" core touring slip-ons. It netted 95hp/107torque and is what we would have expected for this combo. Your LSR system tends to be more HP oriented and so the higher numbers est. in my previous reply. I have to say that I would start with another dyno tune to determine if a more appropriate download is required to allow the PC more lattitude or if it is just a tuning issue, before I would start changing things like cams and pipes. Last, I did not mention earlier that wetsumping may also be happening. The good news is that it is easy to check while on the dyno. If we have more than 7 oz. of oil after a run, then hp will start going down. We can often determine if this is happening just by reviewing several back to back runs (there are several dyno charts showing this effect in our library under test and compare-misc).
Thanks again, Mike

[L.T.]

Heritage,
I was curious what size LSR you have, 1 3/4" or 2"?

[heritage]

is a 1 3/4 ". I believe their site recommended 1 3/4 for up to 107 cuin.