gettin a cam this week SO HELP ME lol
05-02-2006 | 08:52 AM
#23
Originally Posted by PREDATOR-Z
Idle chop is related to OVERLAP.
OVERLAP = (int DUR +EXH DUR)/2 - 2 X LSA
While it is affected by LSA it is not solely a function of it.
Expl: A 232/234 113 will chop as much as 225/225 109 (both have the same 7* overlap)
This again is relative to valve events, though partialy related to LSA, it doesn't mean that a 110 LSA cam cannot "carry" the power well past peak or rev to 6800 for that matter.
What I'm trying to say is, do not just look at LSA and say this cam is this and this cam is that. Look at the Valve events (IVO, IVC, EVO, EVC)
Look, off the shelf cams are GENERICS. meaning they were designed with a broad area of operation in mind.
So the trick in putting a head/ cam in your car is planning:
1- What is budget $$$
2- What is the use of the powerband desired
3- What other mods are needed to complement this powerband
Once you decide on these you are better suited to choose a cam.
Nothing is worse and more dissapointing than a cam that runs poorly with the rest of your mods.
IMO ALL of the big cams are really meant to run on higher compression motors in order to achieve proper power making DCR.
Otherwise they are sluggish at "under curve" range and only peak power cams.
So beware of big is better bandwagon and make your plans.
As a final advice, I would say if you stay stock heads/ stock compression,
get a 224>228 range cam with appropriate valve events to maximise your head output capability.
OVERLAP = (int DUR +EXH DUR)/2 - 2 X LSA
While it is affected by LSA it is not solely a function of it.
Expl: A 232/234 113 will chop as much as 225/225 109 (both have the same 7* overlap)
This again is relative to valve events, though partialy related to LSA, it doesn't mean that a 110 LSA cam cannot "carry" the power well past peak or rev to 6800 for that matter.
What I'm trying to say is, do not just look at LSA and say this cam is this and this cam is that. Look at the Valve events (IVO, IVC, EVO, EVC)
Look, off the shelf cams are GENERICS. meaning they were designed with a broad area of operation in mind.
So the trick in putting a head/ cam in your car is planning:
1- What is budget $$$
2- What is the use of the powerband desired
3- What other mods are needed to complement this powerband
Once you decide on these you are better suited to choose a cam.
Nothing is worse and more dissapointing than a cam that runs poorly with the rest of your mods.
IMO ALL of the big cams are really meant to run on higher compression motors in order to achieve proper power making DCR.
Otherwise they are sluggish at "under curve" range and only peak power cams.
So beware of big is better bandwagon and make your plans.
As a final advice, I would say if you stay stock heads/ stock compression,
get a 224>228 range cam with appropriate valve events to maximise your head output capability.
Originally Posted by ArcticZ28
These are VERY general statements and there is a lot more to cams than I have even begun to hint at.
07-25-2006 | 06:50 AM
#24
I was about to go CAM only and was really looking at the TR 230/224 111 lsa Cam. It has shown good numbers. And I think there are a few dyno sheets running around here that show the power comes up quick and levels off. Thats the cam that I was going with, but now I can afford to throw some heads on too, so my cam is changing. Good luck with all that.