by positron » Sat Oct 31, 2009 4:23 am
More tech talk..
I visited with the shop that dynoed the Ecotec in the HotRod article because I have the itch for cams next year. The Comp cams mentioned turned out to be a safe hydraulic upgrade and a good solution for a improvement on the upper end. My belief is that the street cams peter off at what is the expected rev limit of 6,500, which we can operate well into that. So I set out in search of a high sustained power band, in the 4,000 to 7,000 range.
It turns out that the off the shelf cam set mentioned is one long and one short cam. So I've been in contact with Comp cams to produce a long/long cam same as the one used for this article (see page two). Found here
Article Link
In studying the charts the torque is lower on the bottom end under 3,500 which may not be desirable for the street only folks. Looks like it shifts the peak over to the 4-7k range which is better for where I tend to operate. I don't have any desire to rev over 7k, I don't see the need for it, although I have the valve train for 8k.
Anybody out there beat me to this with any info before I commit? /flame suit on/
*cough* Silver - there are several mentions of more boost = more hot..
More tech talk..
I visited with the shop that dynoed the Ecotec in the HotRod article because I have the itch for cams next year. The Comp cams mentioned turned out to be a safe hydraulic upgrade and a good solution for a improvement on the upper end. My belief is that the street cams peter off at what is the expected rev limit of 6,500, which we can operate well into that. So I set out in search of a high sustained power band, in the 4,000 to 7,000 range.
It turns out that the off the shelf cam set mentioned is one long and one short cam. So I've been in contact with Comp cams to produce a long/long cam same as the one used for this article (see page two). Found here [url=http://www.hotrod.com/techarticles/engine/hrdp_0907_gm_ecotec_bolt_ons/index.html]Article Link[/url]
In studying the charts the torque is lower on the bottom end under 3,500 which may not be desirable for the street only folks. Looks like it shifts the peak over to the 4-7k range which is better for where I tend to operate. I don't have any desire to rev over 7k, I don't see the need for it, although I have the valve train for 8k.
Anybody out there beat me to this with any info before I commit? /flame suit on/
[sub]*cough* Silver - there are several mentions of more boost = more hot..[/sub]