I've searched and searched, trying to decide between GSC S1, S2, Cosworth M2, M3, Kelfrod 264, and HKS 274/278.

Seems like M2 are great not sacrificing bottom end spool, and giving midrange power, and the M3 giving more midrange and slightly more top, with same spool again as M2.
Both wicked idle, but got to give us something.

Anybody can remembrer where Shiv posted the direct comparison between Cosworth M2 and M3?

I am only interested in hard data, dyno plots, as close as possible to apples to apples comparison. If anybody has any plots to share, I'll appreciate it.

 

iirc, john bradley had a compare of those 2 cams.

GL

 

Thanks Aby
I'll try to search for it

By the way, was it you or Emil who had GSC S1's and HKS272?
I looked over the dyno chart with TME turbo which was available on the post, and it seems that the HKS 280 actually outperformed all of them in "area under the curve".
They had near stock-spool, but maintained power on top.
Any feedback?
Thanks

 

the dyno graph only shows wot performance.

the tme compare had hks 272s/280's/s1's

the 272's hit hard in the mid range, drove nice.
s1's drove the nicest, didnt hit as hard as the 272's, but pulled better than the 272's up top.
280's drove ok, least favorite in the city, as they felt numb, but wot performance was better from mid-range to max revs for me.

 

Thank you Aby

That makes sense now.

This is precisely what I am tryingi to avoid: cams that perform only under WOT and/or at top of the rev range.
Looking for mid-range.