Protege Cam thread.

S

StealthWyvern

:
03.5 YLW MSP
I don't think we have a cam thread like this so i decided to throw something together real quick. Please feel free to add to this!

integral / megacyclecams
www.megacyclecams.com
***NOTE: megacyclecam can custom grind cams to the integral stage 3 specs from what I understand. Integral cams is no longer open.***

Videos
P5 Start Idle with Integral MegaCycle Stage 3 cams - http://www.youtube.com/watch?v=2711XiwDWMM

Attachments for specs
http://www.mazdas247.com/forum/attachment.php?attachmentid=184244&d=1306166389
http://www.mazdas247.com/forum/attachment.php?attachmentid=186087&d=1310912897
http://www.mazdas247.com/forum/attachment.php?attachmentid=189208&d=1320004940





twiggy cams
***NOTE: only a handful of these ever made***
intake : 252deg @ 0.003" lift, 8.763mm lift in total
exhaust : 254deg @ 0.003" lift, 9.017mm lift in total

Video
http://www.youtube.com/watch?v=BennG2Gnfqc




CorkSport Power Series cams
http://www.corksport.com/corksport-power-series-exhaust-camshaft-for-2-0l.html?sl=EN
The intake camshaft is 241 degrees at .003", lift of 8.6487mm cam opening 5 deg btdc and close 56 deg atdc
The exhaust camshaft is 241 degrees at .003", lift of 8.6487mm cam opening 48.5 deg btdc and close 12.5 deg atdc


J-SPEC MAZDA FS-ZE Intake Camshaft 2.0L
http://www.corksport.com/j-spec-mazda-fs-ze-intake-camshaft-2.0l.html
 
Last edited:
What isnt listed is the ramp rate, the twiggys have pretty crazy ramp rate and killer overlap for NA Cams. (9 degrees overlap??? Someone help me out here. Orion?)

There was 20 pairs of twiggy sticks ever made, 10 NA and 10 Turbo. The turbo cams have reduced overlap for obvious reasons otherwise the same.

From what ive been told by LW the twiggys overlap is good for 9k rpm so dialing them back is really needed for most street applications (at least NA does).

Aha Found them! Posted these videos awhile back in the exhaust thread there all of NA cars, but you get the idea:

First is Orions Protege. (IIRC in this video he still had stock intake, but had Twiggy sticks, Autoexe header and Racing Beat exhaust).
http://s190.photobucket.com/albums/z128/orion_3582/?action=view&current=MOV00589.mp4

http://s190.photobucket.com/albums/z128/orion_3582/?action=view&current=MOV00588.mp4

CrazeeDs (Custome exhaust IIRC, twiggy sticks + whole lot of other gear)
http://www.youtube.com/watch?v=SOqTj1kza2c

http://www.youtube.com/watch?v=N7xbOWQLA0k

CulRidr's MP3 (Racing Beat, Custom 4-1 Header, CAI, Speed Circuit head(?(Check his build thread for proper details)).
http://s236.photobucket.com/albums/ff97/CulRidr/?action=view&current=MVI_1924.mp4

Note: That apart from CrazeeDs car the videos are pretune so they round pretty rough.

EDIT: Fixed links. Thanks StealthWyvern :)
 
Last edited:
Ice88 said:
What isnt listed is the ramp rate, the twiggys have pretty crazy ramp rate and killer overlap for NA Cams. (9 degrees overlap??? Someone help me out here. Orion?)

There was 20 pairs of twiggy sticks ever made, 10 NA and 10 Turbo. The turbo cams have reduced overlap for obvious reasons otherwise the same.

From what ive been told by LW the twiggys overlap is good for 9k rpm so dialing them back is really needed for most street applications (at least NA does).
Click to expand...

Thanks, I was looking for the ramp rate but didnt see it
 
Ice88 said:
Its never been published. The only reason we have twiggy cam specs now is cause CrazeeD had them cam doctored when he had them out of the car at one time.
Click to expand...

Can you please publish those stats on those cams If I don't have the full info
 
StealthWyvern said:
Can you please publish those stats on those cams If I don't have the full info
Click to expand...
I believe there correct already, but will double check. :)

Only CrazeeD I think would have the Ramp Rate other then twiggy ofc. Heres the specs at .50" duration:


Twiggy Bumpstix - Intake
seat duration =
.050" duration = 221 degrees
Gross cam lift = .341"
Hot valve lash =
Net cam lift = .343"
intake opens 0.8 degrees BTDC
intake closes 40.8 degrees ABDC


Exhaust
seat duration =
.050" duration = 230 degrees
Gross cam lift = .374"
Hot valve lash =
Net cam lift = .375"
exhaust opens 5.9 degrees BTDC
exhaust closes 44.4 degrees ABDC

From here btw:
http://www.mazdas247.com/forum/show...sults-thread&p=4412597&viewfull=1#post4412597
 
Last edited:
Sport23 said:
Subbin. Good info here! Does anybody know the ramp rate for integrals?
Click to expand...

Im not sure it was ever posted. Alot of this stuff isnt published as if you knew it all you could proceed to have regrinds made to the specs.

The twiggy cam overlap is 45.2 degrees btw, not sure what it was for the turbo guys. Its mentioned somewhere in one of the twiggy threads.

EDIT: Yes I know this is an oldish thread but its the most complete thread that im aware of for cam spec.
 
corksport cam info

The intake camshaft is 241 degrees at .003", lift of 8.6487mm cam opening 5 deg btdc and close 56 deg atdc

The exhaust camshaft is 241 degrees at .003", lift of 8.6487mm cam opening 48.5 deg btdc and close 12.5 deg atdc

This comes direct from Derrick Ambrose at CS. Hopefully this thread will get a sticky!!
 
gangstagangsta said:
The intake camshaft is 241 degrees at .003", lift of 8.6487mm cam opening 5 deg btdc and close 56 deg atdc

The exhaust camshaft is 241 degrees at .003", lift of 8.6487mm cam opening 48.5 deg btdc and close 12.5 deg atdc

This comes direct from Derrick Ambrose at CS. Hopefully this thread will get a sticky!!
Click to expand...

Thanks!
 
who regrinds cams at this point?

and also...

how to know what cams to go with?

will i benefit from adjustable cam gears?

this info is great for someone who knows about cams...but i'm a newbie to all of this.
 
Alejo_NIN said:
who regrinds cams at this point?

and also...

how to know what cams to go with?

will i benefit from adjustable cam gears?

this info is great for someone who knows about cams...but i'm a newbie to all of this.
Click to expand...

It might not sound as articulate as I would like but here it goes:
Grinding the cam would change the lobe apex and the amount of contact time to the valves. This would give you more open or closed time on the valve.
Adjustable cam gears will allow you to advance or retard the time that the valves open with relation to spark/engine timing.

I am adding adjustable cam gears to dial out overlap between intake and exhaust cams. So I can advance my exhaust opening time and retard my intake so that they close and open at the proper moment with no overlap.
I hope this helps. Hopefully someone with more time can dive in a little deeper
 
gangstagangsta said:
It might not sound as articulate as I would like but here it goes:
Grinding the cam would change the lobe apex and the amount of contact time to the valves. This would give you more open or closed time on the valve.
Adjustable cam gears will allow you to advance or retard the time that the valves open with relation to spark/engine timing.

I am adding adjustable cam gears to dial out overlap between intake and exhaust cams. So I can advance my exhaust opening time and retard my intake so that they close and open at the proper moment with no overlap.
I hope this helps. Hopefully someone with more time can dive in a little deeper
Click to expand...

ok, so onto bigger questions.

you want over lap because you want both the intake and exhaust cams to be closed for the combustion to happen.

as far as turbo is concerned. do you want mor eoverlap or less overlap?
more duration or less duration?
i definately think you'd want as much lift as possible to allow for air to cram in there faster though, am i correct?
 
Overlap is when both intake and exhaust valves are open. You want a little overlap so that the new air coming in to charge the cylinder with A/F can push out the rest of the burnt combustion from the previous cycle. More overlap from my experience, which is limited, will increase bottom end power by increasing the amount of A/F entering the cylinder for the compression stroke (filling the chamber) by opening earlier in the exhaust stroke . The problem is that while you are clearing the chamber of burnt air you are also sending your new mixture into your exhaust where it is wasted. This will reduce mileage and efficiency of the motor. There is a lot going on all at once but the most critical part is overlap IMO. Too much and your are wasting gas and burning CATS up, too little and you can starve the engine creating lean situations that will rob power. There is a lot of geometry involved for the entire process. Each "stroke" lasts one half crankshaft revolution or 180 crankshaft degrees. Since the camshaft turns at half of the speed of the crank, the power stroke only sees one fourth of a turn of the cam, or 90 camshaft degrees.

Lift can be adjusted by not only by cam profile. Tappet lift x rocker ratio= valve lift.

I hope this gives you a little more to consider... I know when I was reading up on the cams and types I could not grasp the idea completely but once I looked at the head to start work a light bulb went off and I felt the beginning stages of comprehension. Now I believe I have gone and forgotten quite a bit. I had a few articles stored on my home PC I can send your way... if your interested that is
 
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