Wiseco Big Bore Kit

[Hak]

Anyone here have any experience with turbo's on the elevens? I dream to convert mine to fuel injection and slap one on, and had planned on building the motor at that time.

Anyone know how the stock pistons or even the cast overbores will handle the boost? I had just assumed I would go with the wiseco pistons for the added durability but I'm not sure if I'd be better off just buying a spare motor and wait til she blows haha

[IanDMacDonald]

So, there is no placebo effect with that upgrade, lol? Not even a "hell yeah, it's faster!"?

[IanDMacDonald]

Here yah go Hak- https://www.youtube.com/watch?v=Eo9o...e_gdata_player

[Hak]

Haha thanks Ian, I've actually seen that video as well as many others like it. Can't even find a single video where anybody even RIDES the bike! They just start it up and let it idle I'm not sure if they're scared of it or it doesn't actually run!

[crazy steve]

That turbo XS has been around for a while, going through multiple owners. I suspect that it has a great top end, but it's low-speed manners (i.e. normal riding) are rather poor....

[D0wn5h1ft]

There was one for sale not too long ago on Ebay. Reserve was staggering, though.

[Hak]

Was it on a stock motor? Anyone recall how many miles are on it? Basically I'm trying to weigh out wether it would be smarter to build a motor to (hopefully) not blow up or to just buy backup motors haha

[D0wn5h1ft]

Was it on a stock motor? Anyone recall how many miles are on it? Basically I'm trying to weigh out wether it would be smarter to build a motor to (hopefully) not blow up or to just buy backup motors haha

Honestly, if you're going to even think about adding a turbo to these bikes you should start with getting one engine 100% properly tuned and adding fuel injection. Building even one motor that runs at 100% stock specs is a chore in and of itself. We're talking porting heads, new or lapped valves, megacycle cams, new valve seals, new valve springs, setting valve clearances, new pistons/rings for compression, the list goes on. That right there, if you worked on it every weekend, would take months to disassemble, rebuild, complete, and resintall in the bike. This is not even counting how much money it would take to do all of that! And the skill!

THEN, we're talking about adding fuel injection to this now perfect motor. That's new fuel injectors, new onboard computer for timing, finding a mapping for your fuel injectors, and tuning it for your particular motor. That's at least a month of work (assuming working on weekends) and hundreds of dollars.

In tip top shape both visually and mechanical, our bikes are worth anywhere from $2000-$3000 (at least around here). We're talking stock, original paint, etc. After you dump at least $1000 in parts and hundreds of hours of work into whatever you have to make it as described above you then have to add a turbo...do you see where this is going?

If you're prepared to spend that amount of time and money on this bike you would honestly either have to love XS11s more than anyone else here on the site or have disposable income that I can't even imagine. With that same amount of time and money you could just go buy a motorcycle that did all of this and more and never have to worry about it again. Just some food for thought.

[IanDMacDonald]

Gabe- Anybody buying-up bikes and talking of turbos, etc., obviously has a little pocket change. No-doubt in my mind Hak knows what he is getting into as far as time & money.

[Hak]

Haha believe me I understand the cost and effort. You're talking to someone who's owned a SRT4 neon with parts installed on the car totaling more than the car was new, pushing 32+ psi boost.. I've officially got a few nuts and bolts loose lol

When I decided to get into bikes I wanted something really original and personalized, I don't exactly like to fit into the crowds or norms. When I realized that I could push this bike to performance bordering or in some areas surpassing modern street bikes it got me really excited. I'm still working out how I would go about the fuel injection, but mapping a car for a boost level it was never designed for is nothing new to me haha

That's an excellent point as well because if I blow up the built motor I have to rebuild it to the same specs or re-tune the entire thing. If I have it tuned properly to run on a stock motor, I'll just have to swap out the motors and it will be back up and running.

But at the same time I know how big of an impact airflow mods have once you add boost, cutting spool time and increasing torque curves significantly. Ideally I'd like to make at least 130-140 WHP.

All of this will be projects for later in the summer or next winter, once I've gotten used to the bike and wether or not I decide if it's worth it. I'm just trying to get a general idea of what kind of durability the motor has with a few psi thrown at it

[trbig]

But at the same time I know how big of an impact airflow mods have once you add boost, cutting spool time and increasing torque curves significantly. Ideally I'd like to make at least 130-140 WHP.

Heck.. Why not just nitrous? Honestly, knowing the gears in these bikes and the weight they're having to deal with at their current HP and the problems they have with no new replacements now available.. I'd pick another candidate.

[crazy steve]

Durability in these motors isn't usually the issue; if they're in good mechanical condition they can take almost anything you can dish out. There was a top fuel bike in the late 70s/early 80s with a XS-based motor and it ran a stock, unmodified crankshaft at ridiculous horsepower levels...

One issue with EFI on these is the fuel system; finding an electric fuel pump that doesn't suck the inadequate charging system dry is one, and squeezing the needed components into the available space is another. It's not insurmountable as several have managed it, but fitting the injectors onto the motor is the easy part...

There's a couple of EFI threads here, here's one: http://www.xs11.com/forum/showthread.php?t=11498

[Hak]

Haha yep I've read through that one, seems like most everyone went with the megasquirt ecu to handle the job. This is why it's going to be something to weigh out. Another thing I was curious about was how well the turbo xs1100's ran with carbs?? I know turbos and carbs rarely ever mix well, I find it hard to believe the mr turbo and atp bikes of the day were nothing short of a nightmare to deal with!

If the motor can handle it, and I can figure out a decent way to fuel inject it for cheap *enough* (lol) It's something I'm definitely very interested in accomplishing.

[trbig]

The guy I got this last XJ from had just about everything to make one fuel injected, so he says. I think he said it just needs a cheap laptop for tuning? Man, I have so many boxes of the stuff, different fuel pumps, (In-tank and external) etc... And boxes of paperwork that he had looked up to do the swap. All that trouble and money because he hated carbs, the simplest thing to work on if you know what you're doing in the slightest. K.I.S.S. (Keep it simple, stupid) is a pretty good moto in my mind.

[clcorbin]

If you're prepared to spend that amount of time and money on this bike you would honestly either have to love XS11s more than anyone else here on the site or have disposable income that I can't even imagine. With that same amount of time and money you could just go buy a motorcycle that did all of this and more and never have to worry about it again. Just some food for thought.

There is a LOT of truth in this post! I've owned my 79F since 1989 and it is my daily driver at this time (that distinction has come and gone over the years as you can imagine). But I have to admit, every time I have to spend time in the shop fighting carb issues (I am waiting on new aluminum crush washers to come in to fix a leaking carb drain screw right now) or some other age related issue (electrical anyone?), I REALLY start lusting over the new FZ-09.

Then I start thinking, if I had the FZ-09 to be my daily driver, I would have the time to give this old girl the frame off restoration she REALLY needs. And think of all the repairs I could get done in one shot with that much down time...

I'm just a little bit afraid if I got the FZ-09, I would end up with no desire to spend the time on the XS that she deserves.