camshaft specs

[twilightprotege]

hey all,

i'd just like to get all these specs confirmed as i am about to get custom cams ground....if they are correct they should be made sticky thanks mod.

Stock Cams :::

Intake
Lift 0.341"
Duration 198 @ 0.050"

Exhaust
Lift 0.323"
Duration 200 @ 0.050"

Sport20 (FSZE) :::

Intake
Lift 0.344"
Duration 210 @ 0.050"

Exhaust
Same as stock FSDE

All have a base circle of 1.380" and our engines have solid lifters.

later

[p5sundevil]

So then is the Jspec cam sold by corksport and others for the exhaust cam the same as the stock one in ours cars?(that is what I get from that info) If so why would they sell a "Jspec" cam that actually has the same specs as the stock US market ones?

I had assumed both cams had a slightly more agressive grind but wasnt sure.

Also you said you are checkin to get yours ground? So that means you got blanks? If so which ones did you get and for how much?

Also did you already price out to have them ground, and if so what estimates have you gotten for that? I have no idea how much shops charge to do that kind of work.

[1sty]

Cork sport does not sell a J-Spec exhuast cam only intake. The exhuast cam they have is a mazdaspeed cam.

[SedanMan]

Originally posted by p5sundevil
So then is the Jspec cam sold by corksport and others for the exhaust cam the same as the stock one in ours cars?(that is what I get from that info) If so why would they sell a "Jspec" cam that actually has the same specs as the stock US market ones?

I had assumed both cams had a slightly more agressive grind but wasnt sure.

The exhaust cam that you are referring to is the Mazdaspeed exhaust cam.(No its not the one on a Mazdaspeed Protege, its just made by mazdaspeed)

The fsze exhaust cam is the same as ours as was stated above.

[melicha8]

what does @.05" mean

[twilightprotege]

p5sundevil, yes i have blanks - got them from mitch at protege5online.com. getting the blanks ground to my specs is going to cost around $500 australian dollars - that's around $325usd. the guy i'm going through is renound for being the best in aus.

melicha8, i'm pretty sure that @0.050" means how much duration in degrees the cam has when it has moved 0.050" from centre. i'm not 100% sure of this, but that's what i'm lead to beleive. there is also advertised duration (also refered to @0.006"). that is basically the duration in degress the cam is open when it has moved 0.006" from centre....if i am wrong, anyone please correct me.

but further to my first post...can anyone confirm those specs?

[nobody]

that's pretty lame!
that's why we don't make any hp!!!
should have at 0.400-0.440 lift & 264-272 degree @ 0.040!!!

[twilightprotege]

yup - that's the reason why i keep on telling people NOT to go with the jspec and mazdaspeed cams.....BUT!!!!!! dont compair cam duration on cams with solid lifters and hydraulic lifters straight up which is what i'm guessing you're thinking about....@ 0.050" solid duration specs are around 10 points lower than hydraulic specs, but give the same effect

but you're right about the lift. our lift is way too low. the specs i'm going for are 266deg @ 0.006, 222deg @ 0.050 and 0.355" lift. that amount is lift is the most the stock valve springs can take

[twilightprotege]

oh and i should add...For every 10 CI (200cc) the duration needs to be increased by 1 deg at 0.050" to have the same effective duration.

so....222deg @0.050" which is what i want is equivilant to 237deg@0.050" in a 5L engine....and if that was using hydraulic lifters...247deg @ 0.050"

so, can anyone confirm the specs i originally wrote? i'm most needing the base circle measurement confirmed.

later

[ghost]

How about this guys, you guys find out the specs fabricate them and well buy them. Also, see if you can make some for the carswith turbo. Might be a chance to make good $$.

Just a thought, Id buy them!

[YuYuRena]

Originally posted by melicha8
what does @.05" mean

valve duration in degree measured from lift at .05". so 210 @.05" means 210 crankshaft degrees measure when the valves are .05" from the seat.

and i don't know about increasing duration too much, you lose so much bottom end, you'll be like a peaky celica, it's great you get @#% amount of hp, but it's at the top of MT. RPM, unless you guys got a on the fly cam timing thing going, going longer means you lose drivability. no offense but that VTEC thing is one of the first and durable solution. the good thing is the 3 is gonna get it too.

[chooch]

Those blanks don't have as much meat on them as one might think. The max my cam guy got out of them was 216 @.050 and .360 lift with a stock base circle on a stock center line. It didn't make any significant gains.

Then I had my stock cams reground to 221 @.050 and .394 lift by taking 0.060 of the base circle on a stock center line. Idled pretty rough and the CEL was constantly on for random misfires cause it idle so rough. And I couldn't solve the valvetrain noise. I'm guessing the ramp rates were all messed up cause I took so much off the base circle. It was a pig with an open exhaust. No power until I hit 5000rpm. But it was great with the following combination. Racingmazda header, high flow cat, stock center pipe with the MP3 racing beat muffler. I made 131whp and it was great around town. Lots of torque down low. But the valvetrain noise and CEL forced me to take the cams out.

You should be able to find my dyno graph if you do a search. I posted it quite a while back.

"nobody's" cam specs only work with vtec or some sort of variable valve timing... or a 2000rpm ilde with a 8-9000rpm redline

[Little Beavis]

Originally posted by ghostP5
How about this guys, you guys find out the specs fabricate them and well buy them. Also, see if you can make some for the carswith turbo. Might be a chance to make good $$.

Just a thought, Id buy them!

Yeah there are a bunch of us that would buy them, especially if they were tweaked for a turbo (although I have no idea what that would be). But nonetheless I would buy em!

[twilightprotege]

chooch - that lift....using standard valve springs???????

can you confirm what the base circle size is?

[chooch]

Yep.. stock valvle springs. I was too lazy to take a spring out to measure the bind height so I just feeler guaged between the coils at full lift. I don't know how the stock springs will hold up above the stock redline but it was fine for the 1 year I had it in my car.

The base circle diameter would be .120 smaller than stock. I also had to use .060 valve stem caps to make up for the reduced base.

[twilightprotege]

wow! that's a lotta lift for the stock springs, but good to know, thanks!

and thanks about the base circle diameter too

[Rawny12017]

are the mazdaspeed and jspec cams even worth the money?...that was the next mod that i was considering....thanks

[1sty]

Depends on your own opinion. With intake, cams, header, and exhuast you will just be breakinging into the 15's.
To me the $1500-$1750 spent to get that is not worth it.
With that much money I would save some to get the spoolin stage 1 turbo for $2500 to get a proven 50 whp increase.

[twilightprotege]

imo the mazdaspeed and jspec cams are not worth the money - getting blanks and getting them ground or getting your own ground, well that's another story....yes they are worth the time, money and effort

later

[twizyours]

Like they said it depends on your opinion. I love my cams and I am very happy with them. They provide what I was looking for which was upping the power in the top half to redline and not copromising my bottom end. Also they will be fine for turbo in the future and my cam gears when I finally get that rout. If you are only planning to stick with na they may not be the best depending on how wild you want to go. Also a car is a system and the system I am tuning the jdm cams are perfect for me. My car plan consists of a 3 to 5 year plan. Not a 6 month I need power rush. Suspension and other aspects are very important too. Remember a car and tuning is a system know what you want first. If you just want tons of power and dont care about having the best system for your car. Just save up for a turbo.

[twilightprotege]

good to see other opinions :) i couldnt agree more with your twizyours...everyone has their own opinion and goals, nobody is the same.