HOW MUCH POWER?

[mikeboileau]

You going to do a"before" dyno run also? The comparison would be cool.

+1

[Barry]

You going to do a"before" dyno run also? The comparison would be cool.

No time.  The bike came to me with a 149.xx hp dyno sheet.  So figure 150+ whatever it makes if I get around to doing another pull post install.

Barry

[Rudy]

Well, here it is. 160.38 hp. As I stated in my previous post, I have an '09 with a Yosh zx14 full pipe, K&N filter with the zx14 throttle bodies ,PCV and Autotune. A couple of things to note. I used 06 throttle bodies and left the 06 injectors in them. I was confused because the Autotune kept taking fuel away instead of adding. I ended up having a custom map made because of this. The injectors are not the same. They work fine but are different than the c14 injectors . The part number for the zx14 injectors are the same as the c14 for 08 on. The 06 and 07 zx14 injectors are different part numbers. The map for the old injectors won't work for the newer ones. The other thing to note is that there is likely more power to be had by raising the rev limiter. It is set at 10000 rpm now.( The tach says 10500 but is 500 rpm optimistic.) The rev limit for a zx14 is 11250  so it should be safe to do. Could be 5-10 more,maybe. The Autotune map was very close but the tuner got 5 more hp with manipulation.

[Gearhead82]

Well, here it is. 160.38 hp. As I stated in my previous post, I have an '09 with a Yosh zx14 full pipe, K&N filter with the zx14 throttle bodies ,PCV and Autotune. A couple of things to note. I used 06 throttle bodies and left the 06 injectors in them. I was confused because the Autotune kept taking fuel away instead of adding. I ended up having a custom map made because of this. The injectors are not the same. They work fine but are different than the c14 injectors . The part number for the zx14 injectors are the same as the c14 for 08 on. The 06 and 07 zx14 injectors are different part numbers. The map for the old injectors won't work for the newer ones. The other thing to note is that there is likely more power to be had by raising the rev limiter. It is set at 10000 rpm now.( The tach says 10500 but is 500 rpm optimistic.) The rev limit for a zx14 is 11250  so it should be safe to do. Could be 5-10 more,maybe. The Autotune map was very close but the tuner got 5 more hp with manipulation.

Wow, very cool!  Yeah HP is still climbing when you hit the rev limiter so I bet bumping it up would increase your output.  I wonder if any can be done by any of the guys who do the ECU reflashing.  Did you have to modify anything to get the full Yosh system to fit the C-14 or did it just bolt on?

[Rudy]

Gearhead82- The midpipe angle had to be bent lower and further out from the bike to clear. The stainless steel the pipe is made of is soft and bent to the proper position easily. The hanger bracket also needed to be lengthened. That was easily done with a short strap, dropping the pipe about an inch. I also should add that I made a deal with the tuner of my bike . If he cut me a good price on the tune he could have the map to sell to those who wanted it. He is a Dynojet dealer and will provide the map with a PCV purchase.The agreement was to charge $20 for the map to those who already have a PCV.. He kind of came out on the short end on that. For those of you who may have the older 06-07 injectors in thier bike it is a good deal and a great map. He cleaned up the bottom end fueling so no more on-off throttle response and my mileage has been a couple mpg better than before.
Contact:
Bikeman Performance
Erich Long
715-294-4575

[Rawman]

No offense meant, but......

Nice number, but unfortunately thats all it is....a nice number.  Without a before and after dyno run on the same dyno (in a relatively small timeframe) - numbers really mean nothing, other than bragging rights.  What we are looking for is a % increase after the ZX14 throttle bodies are installed with nothing else changing (other than a tuned map).  Different dyno's will always show different HP numbers.  You could go to Chicago and get a dyno run then crate up the bike, fly it to Atlanta and the numbers will be different.

[Rudy]

That didn't take long.

[Rawman]

Really didn't mean to burst your bubble.  In fact, yours is the first I know that has had a dyno run after the TBs have been changed.  But what I am saying is, what if your bike was making 162hp before the mod?  Unlikely, I know, but that is my point, what is the difference that the TBs made?

In contrast my '09 with Flies out, AreaP full exhaust, carbon can, BMC air filter, PC-V with Jamie's standard map is making 151 hp.  What you need to know is the same day, completely stock, the bike made 134 hp which is roughly a 12% gain.

If I added the ZX TBs, I would get a dyno run done, install them, tune the PC-V map, and make a final dyno run.

[Coomers]

Well, here it is. 160.38 hp. 

So we may not have a Dyno comparison with a before & after Zx14 TB install and nor do we know if the Conny injectors would have performed better or not. That being said,

Rudy,

     1.  Was there a noticeable seat of the pant difference after the TB install?

     2.  Have you noticed any difference with you fuel mileage since the install?

One thing we have learned from this dyno run is that we won’t be making the 180 HP that I was secretly dreaming of.

[Rudy]

Coomer,
There is absolutely a difference in power and the way it makes it. There is slightly less low end power but more on top. It really pulls hard in the upper revs. Fuel mileage after a couple of tanks  has been about 2mpg better. Thats probably due to the map. I dont think the c14 injectors would make any more power as the performance of the zx14 didnt change over those years but who knows?

I totally understand Rawmans point about a before and after dyno run and I'm not trying to make any mine is bigger claims. Take it for what its worth. Time will tell as more of us have done this mod and get a dyno run or someone does a before and after run. Its only conjecture on my part but I think its reasonable to believe that this mod is worth in the area of 10hp. I thought I would share what I have learned as so many others have on this forum.

[nsrrider]

Coomer,
There is absolutely a difference in power and the way it makes it. There is slightly less low end power but more on top. It really pulls hard in the upper revs. Fuel mileage after a couple of tanks  has been about 2mpg better. Thats probably due to the map. I dont think the c14 injectors would make any more power as the performance of the zx14 didnt change over those years but who knows?

I totally understand Rawmans point about a before and after dyno run and I'm not trying to make any mine is bigger claims. Take it for what its worth. Time will tell as more of us have done this mod and get a dyno run or someone does a before and after run. Its only conjecture on my part but I think its reasonable to believe that this mod is worth in the area of 10hp. I thought I would share what I have learned as so many others have on this forum.

thanks for sharing..........
interesting that the seat of the pants suggests a detectable reduction in low end......would still like to see the B4 and after dyno runs as suggested above.....for my purposes, losing some low end to gain 10 HP from 10K upwards wouldnt be worth the $ and effort........would need to assess the curves i guess and cost/benefit etc.....

[Rawman]

I would make a guess that the low end power reduction he feels is due to the increased top end and it is just a feeling, or possibly the low end of the map needs to be tweaked.  You should get better hp throughout the rev range. 

To beat a dead horse: That is why a dyno run before and after any performance mod is critical.  You can see where you are getting better and what is not working.

[Barry]

Coomer (or others with the ZX TB mod)....

I'm curious as to the following:

1.  Below what RPM is there somewhat less power?

2.  Above what RPM is there more power?

I for one do NOT want to trade low-end grunt (which the mods I have create in spades) for a high-revving bike.  NOPE.

That said, I dropped the bike for 30K tuneup and was going to have the TBs installed.  Noted the secondary shaft was damaged, and inside of one TB was scored.  Sending them back.  Given the comment on "less power down low", I'm glad I am not installing them.

Appreciate comments on 1 and 2 above from anyone that's done this mod.

Thanks,
Barry

[Coomers]

Coomer (or others with the ZX TB mod)....

I'm curious as to the following:

1.  Below what RPM is there somewhat less power?

2.  Above what RPM is there more power?

I for one do NOT want to trade low-end grunt (which the mods I have create in spades) for a high-revving bike.  NOPE.

That said, I dropped the bike for 30K tuneup and was going to have the TBs installed.  Noted the secondary shaft was damaged, and inside of one TB was scored.  Sending them back.  Given the comment on "less power down low", I'm glad I am not installing them.

Appreciate comments on 1 and 2 above from anyone that's done this mod.

Thanks,
Barry

Barry I’m with ya on that one. I have yet to install the TB’s (still waiting for a map) but I have no interest in losing low end grunt which represents 95% of my riding to gain top end power. 

It is logical though that most of the gains will be in the top end wile the motor is looking for as much fuel / air mixture as possible. Low end? Not sure.

[stlhrsrdr]

we finally had a "training" session for the tuning on the dyno last night(7/26).i will dyno/tune my bike by the weekend.then i will change the throttle bodies,make a pull with no map change.then tune it for the zx 14 throttle bodies.i will post my findings hopefully by the first of the week.if i can figure out how to upload,i'll post the graphs also.anxious for the results!

[jjsC6]

I would make a guess that the low end power reduction he feels is due to the increased top end and it is just a feeling, or possibly the low end of the map needs to be tweaked.  You should get better hp throughout the rev range. 

To beat a dead horse: That is why a dyno run before and after any performance mod is critical.  You can see where you are getting better and what is not working.

Rawman, based upon your posts on this thread, you have a very realistic view of such matters - I applaud you for that.  I have been around fast cars, boats and motorcycles for many, many (and then some) years.  I put an aftermarket turbo on an RX7 nearly 30 years ago, I road raced motorcycles about the same time, and I got into "Cigarette" boats for a while.  In the past 10 years I've been big into Corvettes and have seen many dyno pulls and mods.  Point being that seat of the pants is rarely accurate, dyno runs must be carefully analyzed and as you say, same day, same conditions etc. 

Like I tell people, if I had a tankful of gas for every 90mph boat I beat while showing 83 on my GPS I'd still own those kind of boats.

btw, my comments here are in no way aimed at Rudy - he has been very upfront about the context of his dyno runs.  It's like any information on the forum.  Even without before and after runs, if we see enough of them they will paint a picture.  But right now the sampling is pretty small - but still a data point.

[Gearhead82]

we finally had a "training" session for the tuning on the dyno last night(7/26).i will dyno/tune my bike by the weekend.then i will change the throttle bodies,make a pull with no map change.then tune it for the zx 14 throttle bodies.i will post my findings hopefully by the first of the week.if i can figure out how to upload,i'll post the graphs also.anxious for the results!

Has this happened yet?

[stevewfl]

Heads up, I hope you mimick the ZX14's mad power. 

However, hope you don't mimick its fuel mileage.  Mine with a tuned street map, Brock's header, and BMC filter got a whopping 27-29 MPG on the street.

[stlhrsrdr]

Has this happened yet?

our dyno session has not happened yet,can't get our schedules together.but it is still going to happen.i will post my findings.the before and after will be done on the same dyno,but the pull with the zx14 TB's will probally be the following day.

[Barry]

our dyno session has not happened yet,can't get our schedules together.but it is still going to happen.i will post my findings.the before and after will be done on the same dyno,but the pull with the zx14 TB's will probally be the following day.

CLOSE ENOUGH!  Really wanting a before/after T.B. install comparison.  Thanks for making the effort.

Barry