so i've been searching and i've been seeing a lot of people stating different redlines. i've seen people say its 6500rpm and some say 7200rpm? im running a stock 91 civic si ecu.

 

I believe its higher then the stock si ecu... As the zc motor will pull right up to si redline and smack the **** out of it.. If I had to guess 7200 to 7500rpm,, the zc czm is pretty aggressive in my opinion... Out pullss y8

 

The single cam zc is an a6. Use the stock pm6 redline. 6500 is the redline, 7200 is fuel cut.

 

The VTEC ZC is a whole different animal than the non-vtec ZC. Since you said 91 im gonna go with the answer above. Dont try to rev it higher than that, your not gonna make power

 

does that mean when i hit 7200 my fuel just cuts out and the car dies? and i dont plan on going over 6500 haha. thanks for the replies !

 

a6 maybe comparable, but its different.. its like a b18a vs b18b same but different..

with the a6 ecu the sohc non vtec zc hit redline and wanted more which was not even at 7 yet.. even with the si trans you would fall out of the power band of the zc cause you couldnt rev higher... the zc cam is much more agressive then the a6.. As per crane cams, they dont even offer a cam for the zc because the zc already had a more aggressive one.. He said the a6 cam they offered wasnt even as agrresive as the stock zc cam... Also, i mic' the cam lobes and the zc cam IS more aggressive ...

 

um.. no... The fuel just stops spraying for milli seconds until you let off the gas... the zc will make power past 6500...

 

actually you want to take an engine a little past its peak power rpm like 8k on a 7600 160 hp b16 because its just more benificial than to shift, think about it are you better off taking it to 8000 and losing 10hp,droping to 150hp on a stock b16 or is it better to shift at 7600 droping to 6100 where you make less than 150hp? not only that but you also start the next gear at a higher rpm too if you take to 8k like 6400 vs 6100 thats another gain aswell. this all depends on the power curve. if the fuel cut lets say was at 8500 on a stock b16 it would be worthless to shift at 8500 because there the lose would be just too much the power curve would just go in to a dive on the chart.I think shifting 200-400rpms above peak power is optimum!

but the issue with the zc is its peak power is at 7k rpm and its fuel cut is 7200 so there is not much room and if you get cought in the fuel cut youll loose time so your better off trying to shift at 7000-7100, atleast if you can! shifting at 6500 would be a be waste!

 

k the b16 makes its power at 76oo but it redlines at 8200 and fuel cut is at 8500 i believe and boy do i take that bitch to redline every time i run it

 

you ricers crack me up.

 

I had a jdm cluster from an ef that cam with the sohc zc non vtec, redline was 6800.

 

just because it gets red at that point doesnt mean anything... My si cluster shows 8k on if with redline at 6800... hmm wonder why they would do that... its a suggestion/warning , not the actual true redline or best place to shift the motor at...

 

yes, on a stock motor the redline the cluster indicates is the best place to shift at...

 

Because YOU designed the motor and its cababilities and not Honda right?

Moron alert.

 

do you know what the f*ck your talking about? The zc cam MAY have a tad more duration than an a6 but basically they are the same, kinda like the differences in a JDM D15b and Z6 cam, not enough difference to notice. Idc if you mic'ed the cam lobe, you need to use a drop indicator and a head to measure valve travel to see what lift is not mic'ing a lobe to get true lift. Put a zc on a dyno its not gonna make power past 7k idc what your butt dyno tells you

 

the zc cam as 3 degrees more duration on the exhaust if I remember correctly.

 

yea Im a moron... Yes I helpped design the space shuttle...
Honda actually pays me to gather real time data from HT members..
No... not at all.. Im actually a dog, and hell I dont even know what Im saying half the time..

I mic'd the lobes for SIZE not to get exact figures as how would you do that? But being deductive, and taller/bigger etc. lobe over another tend to have a longer duration... Not enough differance to notice?? Are you kidding me? WTF would it be DIFFERANT, if you couldnt notice? AND IM THE MORON? If you KNOW its differant, didnt that just mean you NOTICED it being differant? lol...

Like I said, the ZC/a6 is like the b18a to b18b, similar(I never said they were not ,why is this even an issue)... Oh and guess what, the b series have an indication of power differences.. HMMM why is that? SLIGHT DIFFERENCE in cam profiles and IM and possibly some other SMALL but DIFFERENT things...

And Stock tachs ARE NOT perfect... So shifting on an SI cluster at what says or looks like 6750 is a joke, as the ZC DOES pull hard and hit the rev limiter/fuel cut like a red headed step child, each and every gear.. ALSO, just by feeling how the car drops off in power in the next gear with an si trans, the motor should be reving higher with those gears to make use of the power it DOES TOO MAKE AND WOULD NOT DOUBT making power to at least 7200rpm...

Who knows, maybe the ZC I received had an aftermarket cam or sum ****, but how likely is that? I have never seen a stock tach be accurate that was made from 2000 and older... For sakes, my tach says my warm idle is 850rpm.. :bs: its actually 750 or even less at times...That sure is accurate... Also, are you really doing a 140mph when it says you are? I hope you dont think so... Faster you go the more INACCURATE the gauge is...


Yea I an f'in moron.. I have no clue... Every motor is differant, and I know for a fact the ZC makes power higher then 6500 rpm like this guy wants to rev/shift at... its simple, race a sohc zc and you shift at 6500 and let the other ZC shift higher.. I know who would win.. do you?

 

lol this thread is awesome

 

Good ****.

 

If by "awesome" you mean a catastrophic session of major failure.....then yes.

How's your car runnin' Tuna?

Any updates on times?

 

I should be starting her up in the next week, cant wait to get back to the track. 09 will be fun

 

seriously steve hit me up when your goin to the track for the first time, i wanna watch/record the run

 

theres this thing called compression, maybe you've heard of it. It varies on JDM motors to USDM motors, not that that has anything to do with the power made