?about afftermaket cams problem

[nudge1201]

Is problem aftermarket companys are having with designing cams just come from the materials used internally in the 2zz engine and in the cams themself? And isn't the stock high speed cam only provide a longer valve opening duration, while honda VTEC cam provides both the duration and lift,while a sliding pin in the 2zz provides the lift. (please correct me if i'm wrong) So would designing the cam for higher lift cause problems also. And would it be posible to modify the sliding pin that controls lift in the 2zz be posible? sorry for so many question. just curious.

[pinoyracer]

A lot of aftermarket companies are already designing cams to the new RSX-S, Isn't the engine Ivtec and the VVTL-i almost similar to each other.

I think they are just only focused on Honda and Acura

[yakkosmurf]

I need to read more details about the two engines, but from my understanding of the mechanisms, it did sound like i-VTEC was easier to put new cams in. We'll see.

[nudge1201]

I know VVTL-i and i-VTEC are similair in result but i think the i-VTEC
still uses the cams to control both duration and lift. since the 2zz uses the sliding pin to control lift i wonder if that altered to provide more lift while not having to change the cams or high speed cam. If some one could break this down for use it would help.

[nudge1201]

So does the difference in acheiving lift by toyota cause problems when trying to put new cams in VVTL-i engines? humm......if there is higher lift doesn't that run into other obstacles like changing the valve clearance cut-out on the pistons or does that only effect compression ratio?

[icyjaws]

Originally posted by nudge1201
I know VVTL-i and i-VTEC are similair in result but i think the i-VTEC
still uses the cams to control both duration and lift. since the 2zz uses the sliding pin to control lift i wonder if that altered to provide more lift while not having to change the cams or high speed cam. If some one could break this down for use it would help.

It would be possilbe to but you would have to change the geometry of the rocker arm. which i'm sure would cause just as many problems. Not to meantion the part of the reason for making cams is to change the duration and overlap which you wouldn't be able to do.