| Author | Message | ||
     Ryker77 |
I've converted my x1 to a carb Hsr42 and aftermarket igntion. NO ecu is used. The igntion is made by twintec for revtech motors. Revtech requested twintec to make the ignition 1005model for them but do away with the adjustable rev limiter. Set at 5500rpms. Now before I took the bike to get "tuned" I could hit 5500rpms. Now the bike shuts down power at 4300rpms!!!! As shown on the dyno sheet and I road tested the bike. in 5th top speed was around 90mph till the power shutdown. ?????????? The guy did tune the bike pretty good -- I assume. It will pull the front end off the ground with just a crack of the throttle in 1st. Runs smooth acclerates fine, decels fine, cruises fine. powerchart is comparable to other bikes I've seen with the same cam. Just cuts out right at 4300rpms even. Would an aftermarket ignition just change its rev limit on its own?? | ||
| Buellistic |
The REV LIMITER should be set at 7K if you are going to run the p#%%& out of the engine, BUT SHIFT AT 6,800 RPM ... If you want it to last do not rev pass 6K !!! In BUELLing LaFayette | ||
| Ryker77 |
like I just posted. rev limter is NOT adjustable. It is set at 5500rpms. The bike ran 5500rpms before he dynotune. Then after the tuning its at 4300rpms? either the ignition crapped out or the carb is out of tune. The A/F gauge on the dynochart is fine. So that leaves only the igntion | ||
| Buelldyno_guy |
Wes, I am not too sure why a tuner would want to reduce the Rev limit on a Sporster or Buell? It can be fixed, but not too sure if it can be fixed using the twintech module. My choice would have been the HD S/E nose module for Sporsters or the Blast. It is a HD part but made by Crane and is the Hi4 C it's the small round nose module and has 10 different adv curves that can me modified. the rev limit is also fully adjustable. It is for sporsters but can be wired into your X1 for the street I would set it for 6800-7000. On you run sheet did you see it go beyond 4300? The unit might have a soft and hard limit. Most H-D's do and stock HD 5800 limit hits the soft limit at 5500. It is used in lower gears to keep you within the hard limit. But in 5th you should be able to hit the hard limit? ... Terry | ||
| Blake |
Humbly suggest that you not hesitat to find another tech. Anyone who would put a 5500 rpm rev limit on a Buell with performance heads is not looking out for your interests at all. Thank the heavens for folks like Terry who do give a darn. Sheesh. As to why the already way too low limit declined even further?... no idea. But I think that issue is irrelevent. Get thee a proper ignition module and thee will be pleased.  Like Terry suggests, the SE module, or the equivalent Dyna 2000 module. Thanks Terry! | ||
| Buellistic |
Ryker77: Tell us were you took your BUELL to be DYNO Tuned ??? In BUELLing LaFayette | ||
| Ryker77 |
I am not too sure why a tuner would want to reduce the Rev limit on a Sporster or the tuner did not reduce the rev limiter. the twintec/revtech igntion is NOT adjustable. Humbly suggest that you not hesitat to find another tech. Anyone who would put a 5500 rpm rev limit on a Buell with performance heads is not looking out for your interests at all I am the one who put the igntion in. I found he ignitions brand new on ebay. for like a dollar each! I bought 8 of them. Sold 6 of them and the profit was used to pay for my new HSR42 and new dyna coil. So not a bad deal--- when it was 5500rpms. As to why the already way too low limit declined even further?... no idea. But I think that issue is irrelevent. Get thee a proper ignition module and thee will be pleased. thats the plan. Just that with my wife in clincals 2.5 hours away and I've full time school--money is tight. Looking at the dyno chart I should have 110-118hp at 6800rpms. I don't want to mention the tuners name. Names and HP seams to start a pissing contest. I doubt that anybody would know of him. Other than a few top tuners. He goes to some of the dyno drag HP contest.} | ||
| Buellistic |
OF ALL PEOPLE, "THE TUNER" should know BETTER ??? In BUELLing LaFayette | ||
| Sarodude |
Daytona TwinTec has a version of the 1005 module (the normal version) with NO such restrictions on it. Plus it's not only adjustable - it is PROGRAMMABLE. You can plot a custom curve if you wish. The SE unit appears to have a programming port - but I hear that the software for it is not available. -Saro | ||
| Davefl |
I will have to get on the bandwagon and say that you need a different ignition. I will be using the Daytona TwinTec 1005 that Sarodude is talking about.. The stock rev limit is 6800rpms. | ||
| Buelldyno_guy |
The S/E unit is made by crane and you can use the Crane SW and cable to program it. ... Terry | ||
| Firemanjim |
Get rid of that Rev-tech ignition module,the stocker was better than that.Was that one of the cheapies offered on eBay? It appears as if there was no benefit to adding that ignition as it has no more adjustability than the stocker. And I read that post "why would your tuner reduce the rev-limit" as asking why the tuner even put on an ignition that would cut the rev-limit on a Buell like that.If anything,after performance mods like you did,a higher rev-limit would have been indicated to make better use of the mods. | ||
| Ryker77 |
Nobody is reading the posting or answering my questions. I am FULLY aware that there are other and better igntions that I SHOULD be using. Also the stock ignition was not better! Why? Becuase it was tied into the fuel injection system that I removed (as posted in the first thread) The question is HOW DID I LOOSE RPM's on a fixed non adjustable (5500rpm) ignition? | ||
| Davefl |
All that said you should not be using an ignition with a 5500rpm rev limit, that only gives you about 2500rpm band to work with..A stock ignition from a non fuel injected bike would be better than the one you have now.. As for how you "lost" rpm's I do not know but I do know that you lost 1300rpm's right off the bat by using that ignition. You have a lot of money in the engine on that bike.. don't cheap out now and use and ignition made for a big twin motor with a low rev limit. | ||
| Blake |
Maybe there was a good reason for the $1 ea price of those modules you purchased? What happens if you use the stock module and just leave the EFI portion disconnected? | ||
| Buelldyno_guy |
The unit might have a soft and hard limit. ... Terry | ||
| Sportyeric |
Stock ignition modules from carburated bikes are available really cheap from people who have put in aftermarket modules. I'd guess $50 including shipping, or less. Ask for cast offs at your dealer.Mine was given to me by a friend but I was surprised to even see them fetch $50 on eBay. I thought the stockers were just paperweights since used electronics are not very saleable. My riding buddy had endless problems with his aftermarket ignition. (I won't mention the brand for the pi$$ing contest that would result but he got two warranty replacements before giving up on it.) Some just seem to have glitches. BTW, I like to shift at 5500 but I wouldn't like to be forced to. | ||
| Rocketman |
The question is HOW DID I LOOSE RPM's on a fixed non adjustable (5500rpm) ignition? Maybe it has a hard and soft limit, and after tuning, which should have included 'timing', that ignition model has decided to select its soft curve only, which cuts out at 4300rpm. Whatever it does or doesn't do, and maybe for all the right reasons that suit your needs that you've mentioned on the BadWeB, I still believe you're not doing the right thing by trying to reduce its performance. In any case, probably the worst thing anyone could do is try to continue someone else's performance work without knowing exactly what the work and the final goal of that work were to be. In short, that bike deserves more, yet it appears you are giving it less. No offense Ryker, but maybe you should work out a game plan that you can afford over a period of time and one that won't see you in the divorce courts either. To put that into perspective. It's already been suggested, you could find a stock module that will suit your needs right now, better than your one dollar investment scenario has done, and with a little suss you could probably get the stock module for a dollar less than you've spent on the one you're fannying around with. Make a game plan that works on paper then execute it as and when you can, but stick to it. I don't know. Maybe I'm wrong and you've got it all under control. But it doesn't sound like it from what I'm reading. Hope it works out for you in the end but these things are sent to try us - sometimes. Rocket | ||
| Ryker77 |
I've got it undercontrol. My plan was just to temporaly use the cheap 5500rpm igntion. It worked fine and would have continued to work untill the wife is done with her medical program. 5500rpms is sorta OK-- But 4300rpms. that isn't even enough to •••• off the neigbors as I blast up my street-- just long enough for 1st gear. The ignition never showed a soft limiter before. I had it up to 5500rpms numerous times. And now 4300rpms is nothing Soft about it. Its a hard shutdown. plan is to buy "real" ignition piece. I allready have the single fire coil. So just about 2 bills will finish the bike. I think I should get a bonus check from my past part time job. thanks for the help.... (Message edited by ryker77 on January 12, 2006) | ||
| Buellistic |
THE MODULE IS GETTING "HOT" !!! In Buelling LaFayette | ||
| Blake |
Heck, I bet there are folks here with stock modules just gathering dust. I may even have one. | ||
| Opto |
Usually aftermarket ignition manufacturers specify a certain coil resistance for their ignition and it may not match the coil(s) you're using. You said you only sold 6 of the 8 ignitions you bought, maybe you have one left and could try replacing the one in your bike. Hey, at least you got your HSR42 out of the deal! | ||
| Ryker77 |
Blake -- thanks for the offer. However with my high compression I need an adjustable settings to help prevent pinging. Using a single fire dynatek coil number DC6-5 -coil resistance is within specs. 3.0 ohms I did keep a spare revtech module. So I could spend a few minutes and swap them out. I could live with 5500rpms for a few months. I did email twintec to ask if there are any hidden safety features that would cause the revlimit to change. | ||
| Ryker77 |
heat could be the culprit--- I've got force pipes. As you know one of the pipe run with in mm's of the cam cover---nose cone. The dyno testing could have cooked the ignition??? I do have my pipe heat wrapped. But the area near the nose cone rub the heat wrap away. So that there is a bare pipe area right above the cam cover. Heat would be higher due to the wrap.. But twin-tec calls heat an "Heat kills electronics. All the major suppliers use the same microcontroller and power devices rated for operation at 105 deg C. We sometimes see problematic applications where several module failures have occurred. The failure mode is a classic thermal intermittent where the module stops firing one cylinder when it gets hot." and "Exhaust pipe without heat shield in close proximity to nose cone" | ||
| Blake |
Just retard the timing, you know, the old fashioned way, by adjusting the cam position sensor. | ||
| Pammy |
You must have a problem with the module. I must say that Daytona Twin Tech makes a fine module. I run a Crane myself(same engineer). On a high compression motor, a DTT would be a better choice(than even stock) as it has a built in 5 degree retard on initial start up. Try another ignition module. I'd be interested in how the bike runs now that everything is fixed properly. | ||
| Firemanjim |
If it is not just missing-- and is cutting out at the same spot every time there is only one controlling element--the ignition box.Anything can go bad,no matter how new,so replace it and see. | ||
| Blake |
Dangit! Sorry Jim, I meant to give you a fiver vote! Dummy me was thinking, "Jim's #1" and well, you see the result. ![: ]](http://www.badweatherbikers.com/buell/clipart/proud.gif) I really am dangerous around a computer. Would everyone, please vote Jim's post above a "5"? | ||
| Blake |
There. I gave myself a "1" as penance. | ||
| Ryker77 |
"I'd be interested in how the bike runs now that everything is fixed properly" She runs fine. Not bad for my first time working on a Buell. I did make one mistake. I forgot to install o-rings on the push rod covers!!!!   |
