| Author | Message | ||
     Tsm81xtreme |
I have a 01' X1 and was wondering how big of a job it would be to switch from the stock fuel injection to a carb set up. I also want to know if it would be a big enough help to justify doing it, and about how much it would cost. Please give me your opinions and thanks alot, Matt Tully | ||
| Kalali |
Why? | ||
| Blks1l |
I did it on my 00 S3. There wasn't much to it at all. I didn't hack up the original wiring or anything it is all still there. The ECM will still operate with the carb also. I saw an improvement in performance. I was having some weird issues that I couldn't fix though. | ||
| Jmkybf |
I put an '02 X1 engine in my M2. The only thing you have to do to change it to a carb, engine wise, is swap to a carb intake and change out the ignition trigger cup to a carb one. Everything else was plug and play on my M2 since it came from the factory with a carb. | ||
| Tsm81xtreme |
I am having problems with my bike, under 3000 rpms if i go wide open throttle (wot) it falls flat on its face. I was thinking that maybe, if I switched to a carb, that would help with the problem. My bike also runs really rich. I am just trying to figure out how to fix it and trying to get peoples opinions. How much would it cost to switch to a carb | ||
| Kalali |
I would get into the ECM and investigate the fuel and other maps and rule out any intake leaks before throwing in the towel. In cases like this, ECMSPY is your best friend. | ||
| Firebolt020283 |
switching to carb should not be very expensive just the price of the intake and a carb. If you go with a mikuni carb(i would recommend this) they sell for between 250 to 300. If you go with a cv carb you can probably get one cheaper than that. | ||
| 14d |
Do you still have the power commander hooked up? | ||
| Pkforbes87 |
<- switching a 97 S3 from carb to intake. Jetting? Sure let me find my EcmSpy cable.. | ||
| Tdman77 |
"under 3000 rpms if i go wide open throttle (wot) it falls flat on its face." This is normal with the stock ecm programing. Have you tried using ECM Spy, or a race ECM? I spent $45 on a cable and got a copy of the race ecm, installed it in the stock ecm and it fix this issue. | ||
| Texastechx1 |
I am having problems with my bike, under 3000 rpms if i go wide open throttle (wot) it falls flat on its face. I was thinking that maybe, if I switched to a carb, that would help with the problem. My bike also runs really rich. I am just trying to figure out how to fix it and trying to get peoples opinions. How much would it cost to switch to a carb personally I see switching to carb a bad way to fix that problem. thats like a guy switching the engine out in his car because theres a vaccum leak (ok, so maybe not THAT extreme, but you see what I'm getting at). The FI on these bikes can be a little fickle... I have to mess with mine every now and then to get it running perfect. *make sure the bike is in top mechanical condition, like fixing leaky intake gaskets, leaky exhaust, etc. * then check all electrical, like the sensors, ecm, TPS reset, timing, etc. WOT below 3000 is a bit much, I do wheelies by giving half throttle at 2500... but not WOT. | ||
| Tsm81xtreme |
tdman, what do you mean by a copy of the race ecm. I have a race ecm on my bike. I think maybe it is the power commander, but I havent had a chance to unhook it yet because I dont have a ecm cable to reset my tps. Plus I am a little unsure of using the ecmspy.....TexasTech, I can do wheelies fine, but also, if I go wot in 3-5 gears, and get to about 5300 rpm, it acts like it is hitting the rev limit, but when I go 3/4 throttle, it will go all the way to the actual rev limiter. Thanks for anymore help you can give me and what everyone has already gave me, Matt | ||
| Yo_barry |
Get rid of the power commander. That will probably take care of the problem and won't cost you anything. Going to a carb just seems to be several giant steps backward, imho. | ||
| Mmmi_grad |
what barry said | ||
| Sloppy |
Fundamental flaws of the carb: 1. It will put fuel in the air no matter which direction the air is flowing (aka reversion flow). 2. It requires probes and air flow disruption to meter fuel into the air stream. For performance, FI can't be beat. Yes, it's more work, but look at what WSB and GP are doing... For simplicity, I'd give it to the carb. Depends upon what you want... Race ECM and ECM spy both are solutions to your problem. For the price of a Mikuni and tuning you'll likely keep more money and have ECM spy. | ||
| Kalali |
I am willing to bet that if you did a TPS reset you will be pleasantly surprised. And while you are at it, check your AFV. It is a good indicator of what your mixture looks like. I may be in a minority here but I really like the Buell DDFI since I got access to the ECM. There is tremendous level of control on the way the bike runs (using ECMSPY) all without changing any parts and all in near real time. | ||
| Bad_karma |
Matthew give the fuel injection a good look with EcmSPY or other softwares available from our sponsors, but if you decide to continue with the carburetor conversion use the HSR42, out of the box, very close to tune with aftermarket exhaust and air filter upgrades. I am using the Screaming Eagle intakes with good results but I remember reading in here that someone used the fuel injection manifold. Also recommend a Crane stand alone ignition, timing cup and matching coil. You are going to need to install a petcock in place of the fuel pump outlet, I like Pingle, good quality and options for orientation. I manufactured a backing plate for the petcock to bolt through and place it inside the tank. Best move you can make if you have a problematic fuel injection system. With the fuel pump out of the circuit you get a little extra current for charging the battery. Some of the advantages of the carburetor is not O2 sensor failures, not Engine temperature sensor failures, no throttle position sensor failures/resets, no IAT complications, no screws falling out of the throttle body buttery fly, no fuel pump failures and your are less likely to be walking with your Buell. The stand alone ignition will also reduce the failures related with the wiring harness. A properly tuned HSR will stay that way for years not so with you fuel injection. Your ignition is the only part of your engine dependent on voltage, not your fuel system. Also strongly recommend that you get an after market fuel ratio monitor to plug into the O2 sensor bong in the rear header. Dialing in your setup accurately and timely is a piece of cake. Maybe I will see you in the mountains this summer. I hope this was the information you where asking for? Joe | ||
| Blks1l |
I did completely forget about the petcock, I was fortunate enough to get another tank from a carbed bike that was allready Amazon Green. I did have VDSTS when I was doing my troubleshooting but it was no help to me locating an intermittent issue, evan after replacing all of the system sensors. I have been really happy with my carb conversion. | ||
| Tsm81xtreme |
Thanks everyone for the great advice. I guess I will go ahead and order the ecmspy cable. I think that I have everything I need to run it properly. So I guess the first thing I am going to do is remove the PCIII and toss it into the Ohio River. Then I will reset my TPS and check the AFV and if that doesnt help my problem I may look into modifing my fuel maps. The whole ecmspy thing seem very overwhelming to me, I really dont want to mess anything up. Well, thanks again for all the advice, Matthew Tully | ||
| Texastechx1 |
The whole ecmspy thing seem very overwhelming to me, I really dont want to mess anything up. Matt, don't let it overwhelm you. I used to be the same way. I grew up around old muscle cars, trucks, tractors, etc. so i was used to tuning and working on carb'd vehicles. but this stuff is even easier... trust me! it takes no time to learn and can be as easy as cake. hope you get her running the way it SHOULD. my bike used to fall flat on its face at about 5000 as well, turned out to be the CHT sensor going bad coupled with a poorly set TPS by some yahoo at the dealer. once it was fixed the bike would rev... HARD... to the moon. EDIT: oh ya, btw, the power comander kinda stuff doesn't work well on our plain vanilla FI... regardless if it is causing you prolems or not... I vote to ditch that thing, put it up on ebay. (Message edited by texastechx1 on June 24, 2009) | ||
| Preybird1 |
If you need some help ask buelldynoguy and firemanjim they are very knowledgeable and do this for a living and as a hobby! (Jts performance) they are a sponsor! | ||
| Tsm81xtreme |
Thanks Texas and Preybird, I grew up the same way. I guess I will go ahead and order my cable then, I will update you guys when I start tweaking with the ecm. Matt |
