twiggy cams

I can't give you a number thats even applicable becasue these went on the car the same time I fully built the engine with overbore, port and polished, changed to CP manifold, got a T3/T4 turbo, bigger FMIC, 3" exhaust Etc Etc Etc. Plus all i had done before. There is no way to tell what the cams have even done, only what everything has done together.
 
they arent suitable for our FS (we have 3 cam pickups, they have 1), but again, that's at the moment ;)

I hope this at the moment this is very short lived....I would love to see another production run of these bad boys...so I can get me a set

common you know you wanna plzz....(kissass)
 
Just ordered Integrals thru CP Boost got the Stage 2.5 for the intake and Stage 2 on the exhaust 2 weeks could of ordered straight from Integral but Carlos at CP was very helpful and knowledgeable when it comes to the MSP.
 
FYI...

from http://www.mazdas247.com/forum/showthread.php?t=123663797&page=2
Crazee D said:
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 the twiggy GB, note the measurements are quoted at .003" lift not .050"

twilightprotege said:
stock cams (us-spec 2L)
intake : 230deg @ 0.003" lift, 8.6487mm lift in total​
exhaust : 230deg @ 0.003" lift, 8.1737mm lift in total

stock cams (1.8L)
intake : 225deg @ 0.003" lift, 7.9527mm lift in total
exhaust : 230deg @ 0.003" lift, 8.1737mm lift in total

j-spec intake cam (2L)
241deg @ 0.003" lift, 8.6487mm lift in total​

mazdaspeed exhaust cam (2L)
241deg @ 0.003" lift, 8.6487mm lift in total​

twiggy cams
intake : 252deg @ 0.003" lift, 8.763mm lift in total
exhaust : 254deg @ 0.003" lift, 9.017mm lift in total​



From integrals site:
<TABLE borderColorDark=#999966 width="100%" borderColorLight=#cccc99 border=1><TBODY><TR><TD align=middle width="20%">[FONT=Arial, Helvetica]<!--mstheme-->[/FONT]</TD><TD align=middle width="20%"><!--mstheme-->[FONT=Arial, Helvetica]Seat Duration (.014")<!--mstheme-->[/FONT]</TD><TD align=middle width="20%"><!--mstheme-->[FONT=Arial, Helvetica]Seat Duration + .003"<!--mstheme-->[/FONT]</TD><TD align=middle width="20%"><!--mstheme-->[FONT=Arial, Helvetica].050" Duration<!--mstheme-->[/FONT]</TD><TD align=middle width="20%"><!--mstheme-->[FONT=Arial, Helvetica]Gross Cam Lift<!--mstheme-->[/FONT]</TD></TR></TBODY></TABLE><!--mstheme-->[FONT=Arial, Helvetica]<!--mstheme-->[/FONT]<TABLE borderColorDark=#999966 width="100%" borderColorLight=#cccc99 border=1><TBODY><TR><TD width="20%"><!--mstheme-->[FONT=Arial, Helvetica]Stock (intake / exhaust)<!--mstheme-->[/FONT]</TD><TD width="20%"><!--mstheme-->[FONT=Arial, Helvetica]
254 / 237<!--mstheme-->​
[/FONT]

</TD><TD align=middle width="20%"><!--mstheme-->[FONT=Arial, Helvetica]242.2 / 226.7<!--mstheme-->[/FONT]</TD><TD align=middle width="20%"><!--mstheme-->[FONT=Arial, Helvetica]214.8 / 198.7<!--mstheme-->[/FONT]</TD><TD width="20%"><!--mstheme-->[FONT=Arial, Helvetica].342"/.322" [/FONT]
[FONT=Arial, Helvetica](8.69/8.18 mm)<!--mstheme-->[/FONT]

</TD></TR></TBODY></TABLE><!--mstheme-->[FONT=Arial, Helvetica]<!--mstheme-->[/FONT]<TABLE borderColorDark=#999966 width="100%" borderColorLight=#cccc99 border=1><TBODY><TR><TD width="20%"><!--mstheme-->[FONT=Arial, Helvetica]Stage 1<!--mstheme-->[/FONT]</TD><TD align=middle width="20%"><!--mstheme-->[FONT=Arial, Helvetica]256<!--mstheme-->[/FONT]</TD><TD align=middle width="20%"><!--mstheme-->[FONT=Arial, Helvetica]249.4<!--mstheme-->[/FONT]</TD><TD align=middle width="20%"><!--mstheme-->[FONT=Arial, Helvetica]217.0<!--mstheme-->[/FONT]</TD><TD width="20%"><!--mstheme-->[FONT=Arial, Helvetica].346" (8.79 mm)<!--mstheme-->[/FONT]</TD></TR><TR><TD width="20%"><!--mstheme-->[FONT=Arial, Helvetica]Stage 2<!--mstheme-->[/FONT]</TD><TD align=middle width="20%"><!--mstheme-->[FONT=Arial, Helvetica]264<!--mstheme-->[/FONT]</TD><TD align=middle width="20%"><!--mstheme-->[FONT=Arial, Helvetica]257.4<!--mstheme-->[/FONT]</TD><TD align=middle width="20%"><!--mstheme-->[FONT=Arial, Helvetica]224.8<!--mstheme-->[/FONT]</TD><TD width="20%"><!--mstheme-->[FONT=Arial, Helvetica].375" (9.52 mm)<!--mstheme-->[/FONT]</TD></TR><TR><TD width="20%"><!--mstheme-->[FONT=Arial, Helvetica]Stage 2.5<!--mstheme-->[/FONT]</TD><TD align=middle width="20%"><!--mstheme-->[FONT=Arial, Helvetica]268<!--mstheme-->[/FONT]</TD><TD align=middle width="20%"><!--mstheme-->[FONT=Arial, Helvetica]261.4<!--mstheme-->[/FONT]</TD><TD align=middle width="20%"><!--mstheme-->[FONT=Arial, Helvetica]227.9<!--mstheme-->[/FONT]</TD><TD width="20%"><!--mstheme-->[FONT=Arial, Helvetica].375" (9.52 mm)<!--mstheme-->[/FONT]</TD></TR><TR><TD width="20%"><!--mstheme-->[FONT=Arial, Helvetica]Stage 3<!--mstheme-->[/FONT]</TD><TD align=middle width="20%"><!--mstheme-->[FONT=Arial, Helvetica]272<!--mstheme-->[/FONT]</TD><TD align=middle width="20%"><!--mstheme-->[FONT=Arial, Helvetica]265.4<!--mstheme-->[/FONT]</TD><TD align=middle width="20%"><!--mstheme-->[FONT=Arial, Helvetica]232.1<!--mstheme-->[/FONT]</TD><TD width="20%"><!--mstheme-->[FONT=Arial, Helvetica].385" (9.78 mm)<!--mstheme-->[/FONT]</TD></TR></TBODY></TABLE><!--mstheme-->
 
^I have no clue what any of that means......

haha i Iz noob to motor building.

he's quoting lift and duration specs. Duration is measured in degrees of crank rotation, lift in mm... the more of each, the more power you make... up to a point obviously.

*notes possibility for sarcasm in your post... but leaves response up for those who stumble on this and truely haven't a clue*
 
Last edited:
he's quoting lift and duration specs. Duration is measured in degrees of crank rotation, lift in mm... the more of each, the more power you make... up to a point obviously.

*notes possibility for sarcasm in your post... but leaves response up for those who stumble on this and truely haven't a clue*

theres a little more to it than that. ramp rate is at least as important (how quickly the valves are opened, and closed, as opposed to how long they are open for (duration) and how far they are opened (lift)). It is possible to have a big cam from an advertised duration/gross lift point of view, that gets killed by a cam with less advertised duration/gross lift but opens the valves more rapidly... it is very difficult to say a cam is good/bad/better than another based on one set of measurements. Unfortunately, most of the time thats all you get....

Also the relationship between lift and duration is important....as well as overlap, exhaust and intake cam advance etc etc.

turbo engines (especially not-so-worked engines....just about anything thats not a race motor) tend to benefit from more lift, where as NA motors tend to enjoy long durations. Of course both are important in either application.

Also, unless you are running a completely insane race motor, low, or no overlap is important for a turbo setup to prevent bleeding boost off through an open exhaust valve on the intake stroke (i believe theres actually negative-overlap on the twiggy cams for FI from memory..could be wrong though).... where as NA will enjoy a larger overlap to assist with scavenging and high RPM breathability.

Then theres the issue of dynamic compression with large cams and so on and so forth...

my point is - its not just a case of looking at the advertised lift and duration in isolation - cams are arguably the most complicated part of the motor to get right.
 

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