wby300
Novice Class
Posts: 43
|
posted October 01, 2009 04:03 PM
OK, I have it narrowed down to web cams, now just need to figure out what lift and duration I want. Camshaft Profiles: .382/.360 272°/270° .383/.369 276°/280° .383/.378 276°/268°
.383/.384 276°/272° .415/.395 268°/266° These are lift in/ex then duration in/ex
I have been reading but I am still a little lost, What do I want for more low/mid but without sacrificing any high end power? I also dont know if the bigger valves will help or hurt with what cams? I think I am also getting velocity stacks from Muzzy that say they increase mid/high. I just want to build an engine that has the maximum horse and a good smooth power curve all the way through, without a turbo or nitrous.
  
|
entropy
Moderator
Posts: 8671
|
posted October 01, 2009 11:30 PM
until you decide what you are going to do about the head, musings on cam selection is not too useful.
BTW: how did you "narrow it down" to Web Cams? (which does fine work), what about Megacycle, or Muzzy?
IMO, it is hard to beat Muzzy's config unless you are doing something extreme to the motor.
____________
This moderator uses moderation in moderation
|
wby300
Novice Class
Posts: 43
|
posted October 02, 2009 01:18 AM
Not sure I follow what your saying, I am getting the head ported and +1mm valves and higher 13.5:1 compression pistons. Full Muzzy pipe, balnce crank, The thing that made me look over the Muzzy cams is it says they are made for big block 1270 and up, I want to keep the stock cc and keep the bike naturaly aspirated. The fact that Muzzy offers one set of cams for all the different types of riding wasnt real impressive either, dont get me wrong, I like Muzzy parts but webcams offers 5 different cams for the 12.
|
wby300
Novice Class
Posts: 43
|
posted October 02, 2009 01:35 AM
I asked what you wanted for the head you have back on page 1,
|
Y2KZX12R
Needs a job
CompetitionCNC.com
Posts: 3762
|
posted October 02, 2009 03:52 AM
Any bigger cams you use on a stock displacement engine will most likely loose power up to 6000 rpm.
With a stock bore and stock displacement you dont want larger valves.
And be carefull opening up the port MCSA to more than 1.85 sq. in. It will hurt power everywhere.
What are your goals for this motor?
____________
Y2KZX12R
CompetitionCNC.com
|
entropy
Moderator
Posts: 8671
|
posted October 02, 2009 05:23 AM
quote:
I asked what you wanted for the head you have back on page 1,
sorry, i missed yr Q about price on the head.
$1100 with brand new custom job on the seats, Ti retainers, ss valves, Carpenter springs, all perfectly set up. I'll even set up the shims if you send me the cams you are going to use.
Mike is thinking about this head, so if he pulls the trigger, he is 1st in line.
____________
This moderator uses moderation in moderation
|
wby300
Novice Class
Posts: 43
|
posted October 02, 2009 03:22 PM
Understand about the head entropy, would be at tax time anyway. So Y2KZX12R, what you are saying is mild port on the head and no oversized valves or hot cams? I want the most power this motor can produce without a turbo or nitrous. I dont race, I just want the power there.
|
KZScott
Needs a life
high on speed
Posts: 7235
|
posted October 02, 2009 04:27 PM
look into getting a 1270 or 1287, port the head. if you go with a big bore you can really do some work to the combustion chambers to get more out of the valves you allready have, or have room for bigger ones. the factory cams arent bad, but i have been looking into getting mine upgraded. its going to get expensive to be able to run big ones. i may look elseware to get more out of my setup. get it properly tuned for performance (not a sheet of paper) im running a 1287 and its working pretty good(see sig), but im dreaming of getting it stroked and having big cams... someday....
____________
01 ZX-12R 8.84 @ 156.3 no bars, DOT tires. Pump Gas, NA.... turbo 8.47 @ 164.
00 ZX-12R 8.62 @ 165.2 no bars, slicks, Pump Gas, 55 shot.... turbo 8.32 @173
00 ZX-12R Fastest NA Kawasaki in the world 1: 222.046 1.5: 226.390 Loring AFB
00 ZX-12R street turbo 1: 227.9 1.5: 234.1 Loring AFB
00 ZX-12R LSR turbo 1: 263.1 1.5: 266.5 Loring AFB Worlds fastest ZX-12R
CMG Racing RCC Turbos
|
wby300
Novice Class
Posts: 43
|
posted October 02, 2009 05:00 PM
I really dont want to go bigger bore though, this sucks, so you guys are all telling me that the ZX-12 is basically as good as it can be from the factory without going bigger pistons or stroker?
|
KZScott
Needs a life
high on speed
Posts: 7235
|
posted October 02, 2009 05:08 PM
no, but you are wanting a lot more power right?
the head/ cam setup is very good from the factory, so you wont get much for gains by spending big bucks there. if you are buying high cr pistons, why not get bigger ones? then you can unshroud the valves in the combustion chambers to pick up some flow.
if you are dead set on keeping stock bore stock stroke, you will want to get the head ported, run about 13.5:1 cr and then figure out what kind of cam timing will suit your driving style. you may want to get the rev limit raised, and you will for sure need to get it tuned by someone who tunes for performance and not a dyno printout
lighten the bike as much as possible
____________
01 ZX-12R 8.84 @ 156.3 no bars, DOT tires. Pump Gas, NA.... turbo 8.47 @ 164.
00 ZX-12R 8.62 @ 165.2 no bars, slicks, Pump Gas, 55 shot.... turbo 8.32 @173
00 ZX-12R Fastest NA Kawasaki in the world 1: 222.046 1.5: 226.390 Loring AFB
00 ZX-12R street turbo 1: 227.9 1.5: 234.1 Loring AFB
00 ZX-12R LSR turbo 1: 263.1 1.5: 266.5 Loring AFB Worlds fastest ZX-12R
CMG Racing RCC Turbos
|
wby300
Novice Class
Posts: 43
|
posted October 02, 2009 05:15 PM
been thinking about the lightening, damn engine is heavy to carry 100 foot to the house. I just dont like the idea of going up in bore size. My riding style is about everything, some subtle drag racing, a little road racing but I dont do any of it on a track. I had the ecu notched, and am getting the cable at tax time also, along with a datalogger. So then 13.5:1 pistons and port job would be better then? was going to do them anyway.
|
KZScott
Needs a life
high on speed
Posts: 7235
|
posted October 02, 2009 05:25 PM
there is more than one way to raise cr. JE lists a stock bore 13:1 piston. you can get rid of the basegasket and or have the head milled also, just be sure to check ALL clearances. dont go much higher than 13.5:1 if you run pump gas though. advance the timing a bit. start with 3 degrees in the upper rpm range
____________
01 ZX-12R 8.84 @ 156.3 no bars, DOT tires. Pump Gas, NA.... turbo 8.47 @ 164.
00 ZX-12R 8.62 @ 165.2 no bars, slicks, Pump Gas, 55 shot.... turbo 8.32 @173
00 ZX-12R Fastest NA Kawasaki in the world 1: 222.046 1.5: 226.390 Loring AFB
00 ZX-12R street turbo 1: 227.9 1.5: 234.1 Loring AFB
00 ZX-12R LSR turbo 1: 263.1 1.5: 266.5 Loring AFB Worlds fastest ZX-12R
CMG Racing RCC Turbos
|
wby300
Novice Class
Posts: 43
|
posted October 02, 2009 05:27 PM
Wiseco makes a 13.5 set, I have access to 110 octane, not street legal but its an option.
|
KZScott
Needs a life
high on speed
Posts: 7235
|
posted October 02, 2009 05:34 PM
in my expirience, 13.5:1 will run fine on 91 octane, but i had the pistons/combustion chambers prepped for nitrous(no sharp edges, several hrs work) you could probly go over 15:1 on 110 octane, but dont get stranded at a normal gas station without it
____________
01 ZX-12R 8.84 @ 156.3 no bars, DOT tires. Pump Gas, NA.... turbo 8.47 @ 164.
00 ZX-12R 8.62 @ 165.2 no bars, slicks, Pump Gas, 55 shot.... turbo 8.32 @173
00 ZX-12R Fastest NA Kawasaki in the world 1: 222.046 1.5: 226.390 Loring AFB
00 ZX-12R street turbo 1: 227.9 1.5: 234.1 Loring AFB
00 ZX-12R LSR turbo 1: 263.1 1.5: 266.5 Loring AFB Worlds fastest ZX-12R
CMG Racing RCC Turbos
|
wby300
Novice Class
Posts: 43
|
posted October 02, 2009 05:37 PM
Well I have the engine apart in my living room, it was starting to run rough and the weather is changing any way, so I am doing the tear down. I am replacing all seals, gaskets, o-rings and anything else that looks worn out. It has 28,000 miles on it, so I figured it needs at least the consumables replaced. Then I got on this power kick, but may end up not costing as much as I thaught to beef it up some then though.
|
|
|
HOME
NEW TOPIC