Performance Cams for the DOHC ZC

[weebeastie]

I didn't know if this was widely known, but there are cams available for the DOHC ZC. In my opinion this has always been the downfall of the ZC is that you couldn't get aftermarket cams. They are priced fairly and they say they are from new blanks. Check it out and someone let us know if they've ever bought from these guys. Crespo Cams.
http://cgi.ebay.com/ebaymotors/Integra-Honda-ZC-D16-D16A1-D16A9-D16Z5-DOHC-Perf-Cams_W0QQitemZ270133736867QQihZ017QQcategoryZ33614 QQssPageNameZWDVWQQrdZ1QQcmdZViewItem


Cam # Profile Application / Type Lobe LDA CL Valve Rise Duration Degrees Lobe Lift Lobe Area
@ .008" @ .020" @ .040" @ .050" (in/mm) (in*deg2)


0 PG6 STOCK. D16A1 Engine. Head Code PG6. (IN-R2, EX-R1). INT 110 105 265 N/A 214 206 .232 / 5.90 30.60
EXH 115 260 N/A 214 207 .232 / 5.90 28.35


0 PM7 STOCK. D16A9 Engine. Head Code PM7. (IN-R3, EX-R4). INT 110 105 268 N/A 220 213 .232 / 5.90 30.60
EXH 115 263 N/A 225 217 .232 / 5.90 32.14

1 H2 Street Performance . Will work with Stock Valve Springs. INT 108 103 274 239 221 214 .240 / 6.10 30.00
EXH 113 274 237 220 213 .240 / 6.10 29.80

2 H3 Turbo Profile. Boost above 15psi. Needs High Lift Valve Spring. AC-H16 INT 110 110 269 255 241 235 .255 / 6.50 35.78
EXH 110 272 249 248 222 .256 / 6.50 35.83

3 H4 Sport Performance . Will work with High Lift valve springs. INT 105 102 296 255 250 235 .255 / 6.50 35.90
EXH 108 296 249 250 222 .256 / 6.50 33.60

4 H5 Full Race Only . Will work with High Lift valve springs. RPM range 5500 to 8300 rpm. INT 107 107 303 282 266 260 .283 / 7.20 43.00
EXH 107 302 249 267 260 .256 / 6.50 39.30


Extra Cam Info:
The Cams are New. NEW DESIGN 2007!!.
These High Performance Cams are made of High Quality Cast Iron material.
Made from blank cams by Crespo Cams.
The profiles fits engines where fuel injection and ignition can be managed if equipped.
Journals and Lobe Base Circle are set to stock dimensions.
Needs Adjustable Cam Gears to correctly degree the cams for optimum performance.
New finger followers are suggested to be used.
Includes Cam Timing Card Specs.
Technical Support thru email included for free !!.

[jlicrx]

we are running the Crespo H4 cams in ours (have for a couple of years) and they work very well

[SOHCinWA]

Web Camshaft makes some real good profiles for them. They have for almost20 years

[weebeastie]

Just wondering what the other major concerns are? I have always been under the impression that the ZC was not a good high horsepower n/a motor because of a lack of aftermarket parts. But if you're building an ITB or Carb setup on a DOHC ZC with some hot cams and lots of compression, would it not outperform an equally built SOHC? Isn't the valvetrain geometry more suited for high rpm use in the DOHC?

It's my fault for assuming that you could not get DOHC D series cams, but with all the 200hp DOHC D discussions going around, it never came up that aftermarket cams are available. Any thoughts from you guys who are wise with the DOHC? Would the added weight of camshaft reciprocating mass undermine its supposed higher RPM capability? DOHC or SOHC D?

I wonder if Bisi would ever consider designing/grinding a set of ZC cams? That could be wild.

[jlicrx]

Just wondering what the other major concerns are? I have always been under the impression that the ZC was not a good high horsepower n/a motor because of a lack of aftermarket parts.
another myth about the DOHC ZC fueled by ignorance on the part of uninformed sheep on the forums that keep repeating this

But if you're building an ITB or Carb setup on a DOHC ZC with some hot cams and lots of compression, would it not outperform an equally built SOHC? Isn't the valvetrain geometry more suited for high rpm use in the DOHC?lots of compression doesn't seem to add that much - in order to take advantage of higher compression, it looks like a lot more research is needed in head modification

It's my fault for assuming that you could not get DOHC D series cams, but with all the 200hp DOHC D discussions going around, it never came up that aftermarket cams are available. Any thoughts from you guys who are wise with the DOHC? Would the added weight of camshaft reciprocating mass undermine its supposed higher RPM capability? DOHC or SOHC D?the big advantage to having 2 cams is the ability to tune the intake without affecting the exhaust or vice versa - with SOHC, anything you do affects both - as for higher rpm, we launch our car at 8000rpm and shift it at 7800rpm and other than the cams, ignition and the carbs, it is 100% stock DOHC ZC, valve springs and all

[hondajosh]

I read somewhere that HKS makes or made cams for DOHC ZC

[jlicrx]

I read somewhere that HKS makes or made cams for DOHC ZCdon't believe they still make them for the ZC - there are lots of people making DOHC ZC camshafts, like: JG Engine Dynamics, Delta, Web Cams, Exospeed, Crespo and probably some more that i am forgetting

[weebeastie]

don't believe they still make them for the ZC - there are lots of people making DOHC ZC camshafts, like: JG Engine Dynamics, Delta, Web Cams, Exospeed, Crespo and probably some more that i am forgetting



Is the compression ratio stock on your ZC? Have you milled the head? Deck height of the pistons? Just wondering. If thats private info, then I understand, but I have prior experience with DOHC non vtec in the form of an H23. I've built a few of those, but none would suit the Civic hatchback that I now drive. Just wondering if the same "tricks" were applied to the DOHC if it would respond as the SOHC does. For example: Custom pistons, zero deck height, milled head, etc. Just some questions.

[SOHCinWA]

Delta DOES NOT grind Honda cams any longer. They send it out and have someone else do it.. They dont do anything Honda related anymore. The new owners know nothing about them. They dont port heads nor do they assemble them anymore

[jlicrx]

Is the compression ratio stock on your ZC? Have you milled the head? Deck height of the pistons? Just wondering. If thats private info, then I understand, but I have prior experience with DOHC non vtec in the form of an H23. I've built a few of those, but none would suit the Civic hatchback that I now drive. Just wondering if the same "tricks" were applied to the DOHC if it would respond as the SOHC does. For example: Custom pistons, zero deck height, milled head, etc. Just some questions.right now, ours is completely stock - no milling, stock pistons, etc. - we have no secrets that we are keeping - we have tried different compression ratios, all the way up to 14:1 - didn't make a lot of difference - maybe 4-5whp - we have used different pistons with stock head, we have tried reducing combustion chamber down to approximately 34cc by milling the head .080" and also decking the block 0.040" with stock type dome on pistons - we have tried lots of things in between - we believe that these things reduce the intake and exhaust flow with result being not much gain - we try to do things by only changing one thing at a time and see what happens - if you do more than one thing and get an increase (or decrease) in power, you don't know what caused the change - for instance, most people decide to build an engine, so they buy new rods, new pistons, new camshaft, mill the head, etc. and end up with more power - problem is, where did the power come from? did the cam provide a lot more power, but milling the head took away some of it? did the pistons really help? who knows? - we have tried a lot of different headers to see what works best - on the high compression engine, the Kamikaze with the big pipes worked better - on the engine we have now, the Kamikaze did not work as well - right now we have a Greddy 4-2-1 - we run our car at 4900-5800ft elevation where we have no air, so what works (or doesn't work) on ours might be different for someone else - if you want to get it right, just try it yourself and don't pay too much attention to what everyone else is doing - do what everyone else is doing and you will end up with something that runs like everyone else's

[nzcivicracer]

Just wondering what the other major concerns are? I have always been under the impression that the ZC was not a good high horsepower n/a motor because of a lack of aftermarket parts. But if you're building an ITB or Carb setup on a DOHC ZC with some hot cams and lots of compression, would it not outperform an equally built SOHC? Isn't the valvetrain geometry more suited for high rpm use in the DOHC?

It's my fault for assuming that you could not get DOHC D series cams, but with all the 200hp DOHC D discussions going around, it never came up that aftermarket cams are available. Any thoughts from you guys who are wise with the DOHC? Would the added weight of camshaft reciprocating mass undermine its supposed higher RPM capability? DOHC or SOHC D?

I wonder if Bisi would ever consider designing/grinding a set of ZC cams? That could be wild.

Have a read up of this if you have a spare hr or so ;)
http://nzhondas.com/phpBB2/rebuild-is-underway-finally-been-to-court-and-won--vtu43753.html

HKS used to make cams, the engine above was running some, 268 deg @0.05", with a shaved head & block for a CR @10.78:1 plus other mods, full aftermarket ECU, esential with bigger cams & higher CR for a decent tune.

As far as cams go, from what I have found Crespo seem to be the only people making DOHC ZC cams from billets.

[jlicrx]

Have a read up of this if you have a spare hr or so ;)
http://nzhondas.com/phpBB2/rebuild-is-underway-finally-been-to-court-and-won--vtu43753.html

HKS used to make cams, the engine above was running some, 268 deg @0.05", with a shaved head & block for a CR @10.78:1 plus other mods, full aftermarket ECU, esential with bigger cams & higher CR for a decent tune.

As far as cams go, from what I have found Crespo seem to be the only people making DOHC ZC cams from billets.well, i did read that thread and the best i can determine from it was that in the end he spent a lot of time and money to get 80kw out of it - 80 kw is equal to about 108whp, which is 10-15whp less than a stock DOHC ZC with IHE

[nzcivicracer]

well, i did read that thread and the best i can determine from it was that in the end he spent a lot of time and money to get 80kw out of it - 80 kw is equal to about 108whp, which is 10-15whp less than a stock DOHC ZC with IHE
Yeah, something didnt go right there! He said it was making 197whp before the build. A couple of other guys on nzhondas can also vouch for the car, I'm still waiting to see it though :)

[SOHCinWA]

Web Camshafts has a few profiles for the a1. They use to make them for Jackson Racing...

[defect]

im in the market for cams.
just wondering what would be suitable for a turbo d16a8 running a gt30

[SOHCinWA]

Try these people .. They have been doing Hondas for over 20 years

http://www.webcamshafts.com/

[transzex]

Crespo, Elgin, Web............

I'll stick with WebCamsInc...........

Customer service wins everytime.

[Senoryandel]

I'll agree with Web. I seem to remember reading about some quality control issues with Crespo.

[remoer]

jlicrx you have come thru w/some good info here and a slue of other forums you and i are members. but i've read many good and bad things about Crespo cams, now i due know you've used them for 4 yrs correct and i also read since they had so much problem w/them they have change the way they made their cam. since i bought theis Dohc ZC head i've been doing alt of reading. and most of all i've kept an eye on everything you've wrutten so keep the good info and when i feel i need to ask a question i pm you.