Hi guys,

Im no engine expert, just wanna know more..... :>

This is wat i understand, i might be wrong though...pls advise...

I know the higher the lift, more air will be able to get into the engine & thus more fuel requires to make combustion efficient. This will equate to more power rite?

So i guess it will help drastically in the mid-end............ & the more duration figures will help in the high end?

Can u educate me about the meaning of duration of the cams? & the lift of the cams?

Thanks....

 

Duration is how long the valves are open, lift is the max value of how far the valves open.

There are a ton more variables (mostly not even advertised) to a cam though. The easiest way for you to learn is here:

http://auto.howstuffworks.com/camshaft.htm

 

kool link....thanks mate...

does it mean that the longer the duration coupled with the lift, the more substanible power is achieved?

 

You always have to put a car together, and a motor together, with a common goal in mind. If you want to build low end power and lots of torque, you should put parts in it and tune it for that. If you want to build a car that revs high and makes a lot of horsepower up high, you are generally going to sacrifice torque but you should build accordingly.

If you put a camshaft that has large duration and lift numbers into a motor with small ports, long stroke, etc. you will not gain much power and in fact could even lose power. You'll get the WORST of both worlds and not the best as many people here think. The whole package needs to compliment itself and become a synergy.

Read other motor links on that website and you will begin to become familiar with the basics. Learn the basics first and then try to understand the modification side of things. Too many people on this website and in the world try to talk about bigger camshafts and modifying turbos, etc. when they hardly even understand how an engine operates. These are the people that cause problems for themselvs with lack of power, killing motors, etc. Don't be that guy!

 

Advise noted .....

I prefer the low end torque & not gona upgrade my turbo as of now...so I guess i will not be taking the route of a higher lift cams for the moment. Gotta reject my fren;s offer of his 260 11.5mm Procams..

Once again...thanks mate for the notion....

 

Well a 260 duration isn't bad for a street/track car. They won't make full power for a high RPM race car, though. The drawback to a lift that high is that you will also have to build the valvetrain to handle it ($$$). I recommend the HKS 264/264. That's what I'll be going with when the time comes.

 

But if u would to upgrade to a bigger turbo in the future, arent u gona change your cams again to a higher lift & duration $$$ ??

 

If I ever do turbo work it will be a larger exhaust housing and Ti or ball bearing internals. I do not like laggy and peaky giant turbo powerbands. I am not after one large number but a "sort of large" number over more RPMs. That is what makes a fast car. The whole dyno curve, not just the highest point.

 

Hey, guess you are the only one that is realli talking to me in this thread.. haha ... Really thanks for the info & the link.

Would a Piggyback like the Apexi SAFC-II be more than sufficient than a standalone tunable ECU for the mods like cams, exhaust manifold, turbo elbow & a boost controller? oK, thats provided that the fuel pump is upgraded.