Injection from Zx14 to Zx12 - ZX Forums
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post #1 of 25 (permalink) Old 12-07-2014, 03:16 PM Thread Starter
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Injection from Zx14 to Zx12

Hi, im new in this forum, i want to put the injection from zx14 to zx12r. Whether it fits? Does anyone knows? Sorry for my language :-)
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post #2 of 25 (permalink) Old 12-07-2014, 03:45 PM
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Why do you want to do this? It's likely not as easy as saying it. You would need to wire up the ZX-14 ECU and who knows if the plug ends are the same? Sounds like a lot of hassle for an unknown result.

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post #3 of 25 (permalink) Old 12-07-2014, 11:08 PM Thread Starter
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Injection from zx14 is more efficient, that`s why i want to install it. Later I will install new injection maps.
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post #4 of 25 (permalink) Old 12-07-2014, 11:54 PM
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There are so many variables beyond the injection that would make the 14 more efficient than the 12. Cams, cam timing, compression, port design, etc. I have owned both a 12 and a 14 and agree that the 14 was more efficient.

Fuel injection primarily controls three things across the RPM range:

Fuel start timing
Pulse width
Spark timing


A power commander can control all of these. Is there something I am missing?

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post #5 of 25 (permalink) Old 12-08-2014, 01:40 AM Thread Starter
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I agree, but in zx14 injectors are more efficient. I know that we can controll fuel injection by ECU, but if the injector will be more efficient we can apply higher dose of gasoline. Maybe I`m wrong...
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post #6 of 25 (permalink) Old 12-08-2014, 03:20 AM
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Each system is designed for the particular machine. How the ZX-14 system can be "more efficient" than the 12R system is the combination of injectors, throttle bodies, ECU, camshafts and cylinder head. You would be better off and spend less time, money and headaches by tuning the 12R system to be efficient (better fuel economy?) by adding a professionally-tuned Dynojet Power Commander that can be set up for your desired parameters. Just slapping on ZX-14 fuel injection will not accomplish this. In fact, the effect may be opposite of what you believe.

You might also want to install a front sprocket with 1 more tooth than stock and possibly change the rear sprocket by 2 teeth. This will reduce acceleration but increase top speed and fuel economy without fiddling with the fuel system.

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post #7 of 25 (permalink) Old 12-08-2014, 04:07 AM
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I agree, even if the throttle bodies fit I'm sure the crank trigger is different which is going to be the big hurdle. It really sounds like a big gamble for an unknown result.

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post #8 of 25 (permalink) Old 12-08-2014, 04:37 AM
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Plus there are so many easier, better ways to increase performance.

It may be a pig, but it's a pig with a rocket in it's ass!
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post #9 of 25 (permalink) Old 12-08-2014, 02:45 PM Thread Starter
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Do You have tinner head gasket? In Poland Yoshimura doesn't have it on offer... Maybe some other producents. I have some works to do in my engine, i have zx12 from 2004. If You have some proposals or links i will be grateful.
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post #10 of 25 (permalink) Old 12-08-2014, 03:02 PM
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http://www.ebay.com/itm/Dynojet-Powe...fb6f9f&vxp=mtr

http://www.ebay.com/itm/K-N-Air-Filt...f6fc6e&vxp=mtr

http://www.ebay.com/itm/PIPERCROSS-P...ec3767&vxp=mtr

http://www.ebay.com/itm/Yoshimura-Ex...264c0b&vxp=mtr

http://www.ebay.com/itm/00-01-KAWASA...86d39c&vxp=mtr


Just a few examples. Shipping to your neighborhood may be an issue, but I'm sure these components are available worldwide.

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post #11 of 25 (permalink) Old 12-09-2014, 12:11 AM Thread Starter
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Thanks but I already have Power Commander, Full Titanium Acrapowic Exhaust, K&N. Im looking for a tinner head gasket because I want to get higher compression.
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post #12 of 25 (permalink) Old 12-09-2014, 01:04 AM
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Contact Cometic for a thinner head gasket.
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post #13 of 25 (permalink) Old 12-09-2014, 03:57 AM
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Quote:
Originally Posted by Zx12rPOLAND View Post
Thanks but I already have Power Commander, Full Titanium Acrapowic Exhaust, K&N. Im looking for a tinner head gasket because I want to get higher compression.
You didn't incorporate that into your original post, nor did you say what your actual goal is. "Efficiency" normally denotes better fuel mileage. I can understand that, since ZX-12Rs are known to be a bit fuel-thirsty. Upping the compression will yield more low-end torque. But it will also require higher-octane fuel. What octane is available in Poland? Have you considered bolting up a turbocharger?

It may be a pig, but it's a pig with a rocket in it's ass!
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post #14 of 25 (permalink) Old 12-09-2014, 04:38 AM Thread Starter
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Who is Cometic? How can i contact with him?
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post #15 of 25 (permalink) Old 12-09-2014, 04:42 AM
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Quote:
Originally Posted by Zx12rPOLAND View Post
Who is Cometic? How can i contact with him?
It's a company.

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post #16 of 25 (permalink) Old 12-10-2014, 05:10 PM
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Quote:
Originally Posted by Zx12rPOLAND View Post
I agree, but in zx14 injectors are more efficient. I know that we can controll fuel injection by ECU, but if the injector will be more efficient we can apply higher dose of gasoline. Maybe I`m wrong...
I used 2006 ZX14 injectors on my 2000 ZX12R when I built it. So far I have had no issues with engine reliability at all, and they support the horsepower I wanted.

Here's the build thread:

http://www.zxforums.com/forums/zx-12...ave-today.html

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Last edited by 2fat2fly; 12-10-2014 at 05:23 PM.
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post #17 of 25 (permalink) Old 12-11-2014, 04:31 AM
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Now our Polish friend will have some idea of how involved adding reliable horsepower actually is. It comes down to a lot more than just bolting on different parts. And all the other things that need to be done such as the strengthened clutch basket and higher-capacity fuel pump are quite telling. Not to mention all the electronic mods necessary to cope with the added equipment.

It may be a pig, but it's a pig with a rocket in it's ass!
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post #18 of 25 (permalink) Old 12-11-2014, 07:28 AM
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Quote:
Originally Posted by Hammerhead View Post
Now our Polish friend will have some idea of how involved adding reliable horsepower actually is. It comes down to a lot more than just bolting on different parts. And all the other things that need to be done such as the strengthened clutch basket and higher-capacity fuel pump are quite telling. Not to mention all the electronic mods necessary to cope with the added equipment.
You're right. I have over $800 in the fuel system alone. Horsepower is not cheap.

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post #19 of 25 (permalink) Old 12-11-2014, 09:41 AM Thread Starter
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Thanks for the ideas
Quote:
I used 2006 ZX14 injectors on my 2000 ZX12R when I built it. So far I have had no issues with engine reliability at all, and they support the horsepower I wanted.
2fat2fly tell me You used olny injectors from zx14 without throttle bodies?
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post #20 of 25 (permalink) Old 12-11-2014, 09:44 AM
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Yes, just the injectors on a modified ZX 12 fuel rail in zx12 throttle bodies. Read my build thread, it's all in there.
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