| Author | Message | ||
     Jetlee |
Was double checking that I didn't have a wideband O2 sensor (I don't), but it is BLACK! It was clean when I put it in, but it is BLACK now. So...is this damn tinkle noise I'm hearing actually ping, or just common XB9 top-end noise and I'm stupid-rich? | ||
| Gearheaderiko |
Spade: Yes. The XB top end is a much better mod than the 515. Its a bit more money too. | ||
| Gearheaderiko |
If I would guess, the tinkling might be too lean, but going to the 180 changes everything. You need to find a way to richen those rpms up without changing anything else. If you shim the needle, it might fix the problem, but then you've richened up the midrange too, which (in my experience) is already too rich. You're running a 46 slow jet which could help, but you've got it set at 1 1/2 turns which means its too rich. See what I mean about different! I'd take a stab at the DAJ solving the problem, but I've forgotten all I know about it! Thanks for the needle link too, I'll read it this weekend. | ||
| Gearheaderiko |
Thanks for the clarification Crackhead, you've done your homework! Well explained and informative. The stock XB9 piston has a dome too, fwiw. | ||
| Ezblast |
I think the low and needle are too rich, that's where the majority ride anyway. EZ | ||
| Jetlee |
I need a wideband. My narrow says I'm stupid rich (.95v). Asking tuning buddies if I can borrow one. That'll get it figured out. | ||
| Crackhead |
Jet, Correct me if I am wrong, but I think the timing notch is in a different location on the XB cams compared to the OEM Blast cams. Are you able to verify the static timing with the aftermarket ignition and the XB cams? | ||
| Crackhead |
Jet, I am just going through the stupped stuff but, What spark plug are you running and what is the heat range? I am wondering if the plug is to Hot, and you are having to increase your AF to compensate. | ||
| Jetlee |
The XB cams do have a different timing notch. Although on my installed, I re-notched the timing cup. I can static time the ignition. I do not have a timing light or plastic plug to dynamic time it. I'm running the Denso Iridium Racing plug, IXU01-27. (Message edited by JetLee on April 13, 2012) | ||
| Ezblast |
Nope - the plugs good - lol EZ | ||
| Jetlee |
Experimented today. After it warmed up, the tinkle appeared as usual. I pulled timing back so that the light went off when the notch passed center of the window, otherwise retained my hybrid SE-0/9 map. Didn't change the tinkle. I dropped the main jet from the 180 to the 170. Didn't change anything else. The tinkle remained, unchanged completely; not better and not worse. I think the tinkle is just some top-end chatter at this point. My multimeter reading my narrowband O2 is reading ~.88v at cruise, which I'm OK with right now. I'd like it leaner, but much below .8v and the narrowband is innacurate. At WOT in mid/upper rpms, it's reading ~.89v, in lower rpms (5th @ 60mph) it's just rich, like .94v rich. I'll drop the main down to the 165 later and see what happens. Need wideband. (Message edited by JetLee on April 14, 2012) | ||
| Jetlee |
http://www.customfighters.com/forums/attachment.ph p?attachmentid=21064&stc=1&d=1334453094 http://www.customfighters.com/forums/attachment.ph p?attachmentid=21065&stc=1&d=1334453094 That just looks amazing. | ||
| Gearheaderiko |
"Correct me if I am wrong, but I think the timing notch is in a different location on the XB cams compared to the OEM Blast cams." Wont matter as far as static timing is concerned, but it is important to remember as you'll never turn the module far enough if you dont re-notch the timing cup. What does matter is if you are using a wasted spark ignition (twin ignition where the spark fires where the missing cylinder would be) the dynamic timing (timing light) is different and you use different marks for timing (which I've listed the procedure elsewhere on Badweb). | ||
| Gearheaderiko |
Definitely a "Rat Blast"! Its more important on how it runs rather than how good it looks getting there! It'll look sweet if its ever 'finished'. But looks hooligan now  Did you use stock Blast lifters? Are those your Y-frames or Thumpe's? Whats that shifter lever off, you're running GP style shifting? | ||
| Jetlee |
I've got the spark for the rear cylinder grounding to the rear shock tower. It's using the XB lifters that came with the cams. They're the same part number as the Blast lifters, though. Those are my Y-frames, I brought the pegs further up than Thumpe's. Shift lever is off an FXR, yes GP shifting. I love the shift pattern. | ||
| Gearheaderiko |
"Shift lever is off an FXR" Same splines? Thats good info as I didnt know if anything other than Sportster or Buell fit and that looks as long as a Blast shift lever. We ran GP at first for rear sets as it was simpler and more durable, but when the cowpie hits the fan the brain reverts to what its used too and since we both were running other bikes it was easier to convert the Blast rather than convert everything else! Reportedly the XB cams are a smaller base circle, but the lifters take up the slack. XB or Blast pushrods? Do you know if they were the same length? I ran my extra wire to a crankcase bolt so it looks as if I'm burning crankcase fumes! | ||
| Jetlee |
Different splines. I stretched it over and tightened it down. It fits the shape of the primary cover like it was meant to be there. It was a take-off at the local dealer (they had no sportster levers!) for like $5 or $10. It's about 1/4" longer than the Blast lever. Yeah, the hydraulic lifters take up the slack. I'm using Blast pushrods. I don't know if they were different, but a quick look at the parts manuals can tell me. LOL @ crankcase fumes! | ||
| Gearheaderiko |
Different part numbers , but why idk? My info says blast pushrods work so.... | ||
| Jetlee |
I'm using Blast pushrods. I dunno why they wouldn't be the same. | ||
| Ezblast |
Per AW a long time ago - the size difference between the two push-rod sets is very minimal. EZ | ||
| Gearheaderiko |
Probably the difference in cam base circles! | ||
| Crackhead |
could the lifters be topping out on the anti-roll/ retaining bolt pins? | ||
| Gearheaderiko |
No. | ||
| Jetlee |
I've been running these cams since before the piston/head swap. Didn't have this particular noise. | ||
| Jetlee |
No tinkling noises this morning. It felt a bit stronger too, like the rings are starting to seal well. We'll see how it does this afternoon. Grabbed a handful of 4th gear on the freeway, and it just shot off. That was cool! Still on the 170 main. Ignition unchanged from Blast parts. | ||
| Jetlee |
Uploading pics to BadWeb takes me forever with resize/upload/resize/upload/etc, so here's a linkback instead... Before and After pics | ||
| Jetlee |
 | ||
| Gearheaderiko |
"Knightriders" here you come! | ||
| Jetlee |
lol! So I got 70 miles to the last tank with a 170 main. This morning I switched down to a 165 main. had some funny noises at 1/4-1/3 throttle. We'll see how it sounds this afternoon when it's warmer. | ||
| Gearheaderiko |
Poor gas mileage or just a 'heavy hand' !!! |
