help compairing cams, anyone smart?

[mrjdmcivic]

hey people, hows all? anyhow im building up my little honda city ga2 project and i want to see whats the difference between cams.
i have a d16z6 engine with p29s and a headgasket which is .51 so im expecting a cr of 11ish. im currently getting the head ported out, for more breathing and getting a seat job done and some springs. i have crome and a integra gsr tb and some decent headers.,

now comes the cam bit.

theres a few cams going around but i want to know whats the best. and what about the rest. im looking for a daily driver and reliable, but as much as power as i can make.

there are these cams, now obx is selling a cam for alot less, and looks to be of good quality build. originally alot of people complained about it but they are now using a new factory to manufactor there cams, and generaly they copy someones profile. e.g. skunk2,

crower stage 2/3 - some issues with quality build hitting cam journal.
vs
obx stage 1. - lot of ppl dont trust.

stages mean nothing to me cause its the lift vs duration which gives the power.


obx s1 Lift/Duration:
IN. 0470/240
EX.0.445/240

crower3 lift/duration:
IN. 0442/329
EX.0468/317

now im no cam expert but it seems that the obx has a bigger lift on the intake however the crower s3 has a longer duration with less lift? now the exhaust side of the crower has a bigger lift but remember people vtec is only on the inlet side of the sohc engine. so having a bigger lift would mean a bigger vtec reaction, but without the duration, will it make more torque? and if not what about clearence, if the valve is getting pushed more down, will it hit the pistons being that they are p29's....

[dkid15]

Do not by obx for a camshaft. BAAD IDEA. Right now leading the way for you should be crower stage3, akmee type r, Bisimoto regrind, rs machine regrind.

[transzex]

duration numbers can't be compared readily.

BTW Those are the first specs I've seen of the OBX cam, 240 is alot of duration, but at what lift?

1mm (.0395") 240 degrees duration would be about equal to .050" lift and 215 degrees duration. The Crower numbers would be from .001" lift, which is NOT the proper way to spec out a cam.

With most American cam makers, they spec out their cams @ .050" VALVE lift. It helps to compare cams, but even then the LSA (Lope seperation angle) and ramp design will GREATLY effect the powerband and rpm limits of the cam.

[SOHCinWA]

Bisimoto------ Ftw Bisi can have a .450+ lift cam done without messing up the rocker arm geometry.... I have one in the car right now.. TOTALLY worth the money :TU:

[Altyman]

Delta are unexpensive and people here seem to think they're worth it!

[leshok]

With most American cam makers, they spec out their cams @ .050" VALVE lift. It helps to compare cams, but even then the LSA (Lope seperation angle) and ramp design will GREATLY effect the powerband and rpm limits of the cam.

Bone is right on.
LSA is important for creating torque in a particular part of the powerband. Although I rarely see it advertised...wierd

[SOHCinWA]

Delta are unexpensive and people here seem to think they're worth it!

unfortunately they dont grind their Honda cams any longer ...... they farm it out... no quality control at all anymore.... I know the owner (new Owner). His Ex-wife is my girlfriend. I met her in the internet..... Very long story...... But I know the inside scoop on the company

[transzex]

which puts it back with Laurie @ Web right?

[SOHCinWA]

LOL....Laurie and Steve have known and done R&D with my dad for many years... They are great people. Even before I knew my dad dealt with them I was buying cams from Jackson Racing, which they had Web grind their cams... Web is the best for the D's without a doubt. And I worked for Engle Racing Cams when I was a kid and could get anything I wanted ground or I could have ground myself. I chose Web. They have been around longer than anyone else in the Import industry. Thanks Bone

[88cr-rex]

It helps to compare cams, but even then the LSA (Lope seperation angle) and ramp design will GREATLY effect the powerband and rpm limits of the cam.

:TU:

You can get an idea if they both have advertised and at .050" and compare the two, but I never have understood why "import" cam people don't post up/tell us things like that.

[mrjdmcivic]

ok now my choice is between a crower s3 vs a zex, now alot of you are saying crower is good, but at this other forum alot of people trying the zex also say its good, and they both have different lifts/duration. im looking to build a street motor, which is powerful and makes good power all around, especially top end. (vtec) , i don't want this ruff idle stuff. i want it to idle like a normal honda would. what do you people think. crower or zex. you all can read the zex information on the other forum link.


http://honda-tech.com/zerothread?id=372869

[SLO SOHC]

crower dont get a zex!

[leshok]

The crower 3 cam is a lot bigger than the zex.

[transzex]

as you can tell I'm a Zex person.........

Go Crower :)

[dkid15]

So sohc in wa basically your bangin the old delta camshafts owner and telling everyone to go bisi. Nice +2 for that

[SOHCinWA]

The new owners (3 of them) are like dealing with the 3 stooges. The original owner is a very knowledgable man and is a pleasure to talk to. Its too bad his son is running the business in the ground.....

Everyone has their opinion for performance. Everyone has a choice. 20 years ago there was nothing for these cars.

[transzex]

all falls back to the diehards, those not looking for the golden apple.

REPUTATION

Something I PRIDE myself in, learning from others screwups. Sure I've lost money on a few trannys.....but in the long run I'm way ahead.

[SOHCinWA]

Thats why I have chosen anyone that has used WEB. They have worked with D's longer than anyone. And not just copied someones idea. R&D is where its at. And the fact that they use to ask my dad to do R&D for their motorcycle cams.... I never knew... They strive to be the best everyday.