Ok, I"m sure this has been brought up many times before but I'm new to this board so cut me some slack Anyway, I was just doing some pricing on upgrading my '95 916 motor. My worry is that whatever you do to it is pretty much sunk cost that you will never recoop and I question what heavy mods (955 big bore, HC pistons, cams, etc..) would do to reliability. The benefit I see if spooning in a 996 motor is that you can get them relatively cheap and then you could sell your stock motor! I've seen 996 motors sell for as low as $1200... which brings up my next question, what parts would you need to actually do the transplant? I've been told rear harness, ecu and thottle bodies. Is this correct? For the record, I would probalby not be doing any of the work myself so I have to factor in labor costs that would be involved. Also, what about a 998 motor? Will it fit the same? I know these are more expensive and harder to come by. Do they make much more power than a 996?? Any info or opinions would be appreciated---
8% higher? wow! I've never ridden any bike with gearing as tall as my 916 was stock... I've switched to 15/40 right now (up 4 on the back) and it' still seems kinda tall
Good information about swapping the primary gears. Anyone have any specs, recommendations, etc on modifying the stock 916 motor? Any dyno charts? I've heard you can pick up close to 10 hp with some SPS cams degreed in and proper fuel ratio adjustment.... anyone?
I've done BUCCI hi-comp pistons and Vee2's version of SPS cams from BCM, dialed to Bruce's recommended numbers in my '95-916. While there was an increase I don't really think it's plus 10hp. I've yet to get it back on the dyno to find out for certain. One thing to remember, the 916 seems to be notoriously undervalved at 33/29 I/E, so bigger valves/ porting may really wake it up much better, also requiring a bigger exhaust...... YMMV
What about the 955 kit? I've seen some pretty good prices on these and hey, no replacement for displacement right?? hah Plus it comes with new cylinders and everything... Anyone done this?
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Lawdog78 »</TD></TR><TR><TD CLASS="quote">Anyone have any specs, recommendations, etc on modifying the stock 916 motor? Any dyno charts? I've heard you can pick up close to 10 hp with some SPS cams degreed in and proper fuel ratio adjustment.... anyone? </TD></TR></TABLE>
Here's some info on a 916cc engine (my ST4) that picked up 15HP with just cams and some headwork:
Checked out your dyno chart...that's pretty impressive! Talking to a couple of guys at engine shops it sounds like there is tons to be gained through head work... From the previous post about valve sizes on 916's, I bet it would help a lot to open those up and let it breathe. Of course that can reach pretty deep in your pockets quick I'd imagine---
Ok, I chose to resurface this thread rather than start a new one. I need more info!! I've changed my mind on this about 20 times! Ok, so what mods would you have to do to a 916 motor to really get more performance? I'm not talking about a healthier midrange and smoother curve either... I mean BIG difference? It seems it would be way cheaper to put a slightly modified 996 motor in and sell the stock motor is it not?? Another issue is I had my geometry professionally set up, so if I put a 996 and have to change the gearing, my set-up just goes straight out the window!? What would the cost be of an upgrade like this? I'm sure you could spend as much $$$ as you wanted but I mean within reason and retain good reliability. All I've got right now is a chip and two-bros slip ons and I've shed about 30 pounds off the beast---
It would be cheaper and easier to take a modified 996 and replace the 916 motor. What you end up as mods for the 996 is still dependent on how much $$$ you want to throw at the project. ie: balanced knife edged crank, rods & pistons, cams, porting, exhaust....... would be a very nice start. (IMHO)
The overall weight of the motor will be the same, so your setup requirements shouldn't change..... but you're going to need a different wiring harness, computer, and the tachs are different for each respective computer (P-8 vs 1.6m), plus mounting modifications for the computer. ........YMMV
IMH experiance, the MOST you can get out of a 916/955 is mid 120s.Will cost about 4k. Along with the displacement advantage of a 996, the heads were changed as well. If you look at the 996 and 916 heads side by side , you can see the differances. The 996 heads have already unshrouded bigger ports,bigger valves, etc. Its kind of like now, trying to make a modded 996 as fast as a modded testastretta. It can be done, but around 140HP you are about as done as done can be with a 996( and probably not streetable) With a Testastretta at 140 it still idles,doesn't require race gas and if you want to take it to race motor level, you can get 15-20 more HP. Time marchs on and a 916 is two generations ago.
Excellent information....thanks! Now for the record, what does "ymmv" stand for? I'm good with the online abbreviations but I can't seem to figure it out
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Lawdog78 »</TD></TR><TR><TD CLASS="quote">Excellent information....thanks! Now for the record, what does "ymmv" stand for? I'm good with the online abbreviations but I can't seem to figure it out </TD></TR></TABLE>
another alternative is to find 916 SPS parts, left side case, timing gears, flywheel, and you can retain your P8. Lots of chips available as that's what Ducati used for racing. However, you can probably sell your P8 on eBay for big bucks, or wherever and switch to the later ECU. 996RS parts also work.
I've seen sps cams all over the place.. what would be the advantage to the left side engine case?? Also what would a later ecu do if I still keep the 916 motor? Do tell do tell....
The 996 has a different electronic ignition system than the P8 system. To convert you need the P8 compliant side cover,timing gears,flywheel. There is also a difference in the charging system, single phase vs. 3 phase.
916/996 motor swap?
Anyway, I was just doing some pricing on upgrading my '95 916 motor. My worry is that whatever you do to it is pretty much sunk cost that you will never recoop and I question what heavy mods (955 big bore, HC pistons, cams, etc..) would do to reliability. The benefit I see if spooning in a 996 motor is that you can get them relatively cheap and then you could sell your stock motor! I've seen 996 motors sell for as low as $1200... which brings up my next question, what parts would you need to actually do the transplant? I've been told rear harness, ecu and thottle bodies. Is this correct? For the record, I would probalby not be doing any of the work myself so I have to factor in labor costs that would be involved. Also, what about a 998 motor? Will it fit the same? I know these are more expensive and harder to come by. Do they make much more power than a 996?? Any info or opinions would be appreciated---
Time marchs on and a 916 is two generations ago.
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