Whew, anywaysw, will the zc camshaft work in a stock si?

Any gains, and if so, is it worth the effort?

 

yes it is a littler hotter and will give you a little gain if you can get one cheap go for it

 

Thanks for the help...anyone else?

 

I've been asking this for awhile now. I put one in my D16A6 but I havent started the motor yet ( on engine stand. I used the one that came off of a carb'd zc (funny lobe at distro end) so we'll see if it works.

 

should work fine. valve adjustment specs are the same, timing is the same. intake lift is just higher. exhaust is the same. its gotta be from the MPFI engine tho, not the carbed (with the funny lobe for the mechanical fuel pump) thats totally different.

http://www.norcalcrx.org/tyson/SOHC_Cam.html

 

So i guess i should take mine out then huh

 

like ive told you many times, the carbed cam will physically fit in there. its just the specs are weird. i wonder if youd get any benefit. im sure the engine will run and go and make power. try it and tell us if you feel the difference. ive not seen any dyno comparisons. im waiting on the next dyno session to happen....

 

yeah the motor isn't in the car yet so i have yet to test it. I used the same specs of the A6 to set the valve lash though. Hopefully that different exhaust timing doesnt screw me

 

I picked up one off of ebay a year ago and installed it in my Si. Adjusted the valve lash and it works great. I have specs for the cam. If you have excel on your computer, I can send you the specs. I think I have the factory cam specs as well, I have to look for them. Let me know if you want them.

 

does it match to these specs? which one do you have, the carb or the mpfi one?

 

My camshaft is from a JDM ZC engine. The spec sheet I have is very diff. If you want it I will email it to you.

 

im running the zc carbed engine in my hatch and it runs fine flew through etest.....
with the higher exhaust lift its actually better because u are getting rid of old exhaust so its ready for the intake which is actually better for compression

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dread731 &raquo;</TD></TR><TR><TD CLASS="quote">I picked up one off of ebay a year ago and installed it in my Si. Adjusted the valve lash and it works great. I have specs for the cam. If you have excel on your computer, I can send you the specs. I think I have the factory cam specs as well, I have to look for them. Let me know if you want them. </TD></TR></TABLE>

Post up the specs you have for the carbd zc cam

 

specs are in excel. having some difficulty posting the file. too tired to mess with it. if you want the specs, let me know. i'll send them to you

 

i already imed you my email.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by VegaS10 &raquo;</TD></TR><TR><TD CLASS="quote">Whew, anywaysw, will the zc camshaft work in a stock si?

Any gains, and if so, is it worth the effort?</TD></TR></TABLE>

Without previously installing a cam in a car myself and some friends did it in about 3 and a half hours. So I would say it is worth doing even if you havent done it before. I still need to adjust the valve lash a bit more but it really rips from 4k and up.

 

i noticed the same thing. at 4k rpm, it really kicks in and cont's pulling to about 6.5k. sort of like a mini vtec. ha.

 

thanks for sending the file on email. i got it.

your measurements on the ZC cam, which seems to be a MPFI cam, is pretty consistent with my measurements for the MPFI ZC cam.

however, your measurements of the stock A6 cam are way off. it looks like you did not center your dial guage and get the true peak. the measurements i show for the A6 cam are pretty consistent with the handful of other A6 cams I've measured. a peak lift of 220 intake and 187 exhaust is out of spec.

well, glad to hear the MPFI ZC cam performs well. ive given one of my MPFI ZC cams to a friend to be dynod soon. hopefully he can get that done soon.

 

I actually did not do any of the measurements myself. They were sent to me by a fellow enthusiast. Not sure who did the actual measurements. I'll have to email him and see how he got them.

It was strange. When I compared the two cams side by side, I was at first pissed because the Si cam looked to have more lift, but the ZC had more duration. The person I purchased it from guaranteed me I would get more from it and gave me reasoning (I don't remember exactly what he said) that sounded very reasonable. I have been thinking about putting my Si cam back in to see what the diff would be.

I'll keep you updated on both events.

 

the specs i have are a little different. from these it seems as though both lobes are bigger, not just the intake. taken from the Archive at d-series.org
oh, and my sohc zc pulled a lot better than my a6 does. definately a difference

 

got one in the garage if anyone wants it. $1,000,000.00!!!

-josh-

 

ive corrected that table. what they list as the "mystery" cam is really the MPFI ZC cam. they are incorrect in labelling their "ZC" cam as MPFI, they admitted that that specific cam had the extra fuel pump lobe that would only be for the carbed version and were confused about the carbed cam being different from the MPFI cam. so definately, the "ZC" cam they list is just a ZC cam from the carburated ZC and the "mystery" cam is the MPFI ZC cam.

anyway, i would think its hard to tell any difference between the A6 and ZC cam, carbed or MPFI, except for the fuel pump lobe, just by eye sight. i have personally dial indicated all 3, on the same bench. i have multiple stock A6 cams and found 2 MPFI cams and 1 carbed ZC cam all at my disposal. so using davens and kwickos data (shown above) which is pretty consistent to my measurements, its clear what the differences are.

 

Ok, so the JDM ZC camshaft will fit in perfectly right? How bout a 92-95 Si OBX Camshaft, will it fit?


Modified by CelicaGT-S at 4:59 AM 8/13/2005

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tyson &raquo;</TD></TR><TR><TD CLASS="quote">ive corrected that table. what they list as the "mystery" cam is really the MPFI ZC cam. they are incorrect in labelling their "ZC" cam as MPFI, they admitted that that specific cam had the extra fuel pump lobe that would only be for the carbed version and were confused about the carbed cam being different from the MPFI cam. so definately, the "ZC" cam they list is just a ZC cam from the carburated ZC and the "mystery" cam is the MPFI ZC cam.

anyway, i would think its hard to tell any difference between the A6 and ZC cam, carbed or MPFI, except for the fuel pump lobe, just by eye sight. i have personally dial indicated all 3, on the same bench. i have multiple stock A6 cams and found 2 MPFI cams and 1 carbed ZC cam all at my disposal. so using davens and kwickos data (shown above) which is pretty consistent to my measurements, its clear what the differences are. </TD></TR></TABLE>damn good info! thanks

 

so still noone has tried the carbd ZC cam in the A6 yet ( besides me.. but havent started it yet)?