mike323

I received them today. I quickly measure the lifts and the exhaust cam has a lift of 0.338" whereas the intake cam has a lift of 0.321". I used a vernier to measure them quickly, once I get them to the shop I'll have more accurate lift values.

Without measuring the duration I can tell just by looking at them that the exhaust lobes have more duration over the intake lobes. I wouldn't be suprised if we get 10whp at least from just regrinding both cams with a mild cam profile, can you imagine something more aggressive.

zorlac7

well..the problem isn't the regrind or not..the problem is that i'm from Panamá (Central America). I need new cams but performance cams not oem, with good duration and good lift. for a BP DOHC Motor.

Tweeaks

I am also wondering about something more aggresive would the price stay the same??

zorlac7

mike323:

i need the profiles of lift and duration of E & I cams of BP DOHC Stock Motor. I need the profiles of cams agressives too (if u made it)

mike323

I offer two grinds:

.352" lift, 202deg@ 0.050"
or .353" lift, 209deg@ 0.050"

Both grinds have more lift and duration than the miata/protege cams.

The price is $200US + $30(shipping) to regrind your intake/exhaust cams.

zorlac7

how much is the duration ?? NUMBERS PLEASE.

mike323

I gave you the duration at 0.050" lift.

mazdaspeedwest

What's the difference between the two? obviously one is more agressive than the other, but what are we too expect at idle? Where are the gains in the power curve? and at what RPM?

Basically, do you have a dyno chart showing one or both of these profiles?

zorlac7

ok mike..the lift are good BUT the duration is like the stock cams. isn't agressive..i need something like 250+ of duration.

mike323

The advertised duration(0.004") is 246deg. for the 0.352" lift cam, and 258deg for the 0.353" lift cam.

The advertised duration of the stock intake cam is 233deg. (48+5+180).

Both profiles will give you at least 10whp.

mike323

Idle with the 0.352" lift cam will be at stock level(700rpms), with the 0.353" lift cam idle will be a bit lopy but still around 750rpms, with an adjustable intake cam gear you'll be able to make it idle perfectly at 700rpms.

Expect about 10whp with the 0.352" lift cam at 400-500rpms further and about 15+whp with the 0.353" lift cam at 650-750rpms further. I haven't dynoed them but I feel confident based on my knowledge and experience with the Mazda KL(2.5L) and B6 (1.6L) engine.

I haven't performed any dyno runs but I have received a set of cams from "spooki" and he will be doing a before and after dyno run with one set of my cams.

mike323

A friend of mine installed a set of .368" lift and 266deg. @ 0.004" on his Mazda KL engine and he always had idle problems, it would stall on him even if he adjusted the idle screw. Also his lifters where noisy since the base circle radius was reduced so much that his lifters worked overtime.

Cams with more than .360" lift and more than 260deg duration require you to port/polish the heads and also to use higher compression ratio pistons to get full advantage of the cam.

The majority of the people want a cam that will idle in an acceptable fashion and still make the car pull at higher rpms above 6500rpms.

When you choose a cam don't just look at it in terms of lift and duration, you need to see the whole picture like valve timing events and closing ramps.

zorlac7

u know where i can get some like this but for BP ??

mike323

You'll need to modify your stock springs with this setup, since your valve springs should bind at that point. The max I would go with the BP engine is 0.354" if you want to use your stock springs.

zorlac7

ok..thanks for the info.