HKS 272 cams (10.3/9.8mm) have more lift that the Crower 272 cams (9.98/9.63mm), but slightly less intake/exhaust lift than the Crower 280 cams (10.44/9.93mm). I read up on a review between the Crower 280 vs HKS 272 on a website in the U.S, so I will post the results in this thread when I get home from work. From memory it was said the HKS 272 were the better cam overall (low/midrange/top end) but it was only a comparison using the stock 16G turbo or something not so large from memory. Anyway, stay tuned for a read late this afternoon :wink:
I'm sure I posted the Crower cam specs before somewhere but here goes again :lol: Dont pay attention to the top grey area of the table as its for non turbo cams. The rest of the table in white are for turbos and you can see the specs for yourself... I got a set of the 280 Stage 3 3/4 race cams in my beast and cant wait to turn key and listen to it breath like an asthmatic :lol: :twisted:
OK, info as promised:
--------------------------------------------------------------------------------
The Crower Stage 3 cams were tested by Automotosports.com.
Coincidentally the test was done using a 16G turbo, so the results show almost exactly what you would be getting with your setup. Personally, I would choose the HKS 264/272 combo with your setup. The Crower Stg3 cams look more like high rpm cams for drag racers with raised redlines and big turbos. They sacrafice low and midrange power for ultimate top end. But as you can see, the 16G runs out of flow above 6k rpm, so there's no point in running big cams with small turbos, it's a mismatched combo.
--------------------------------------------------------------------------------
Taboo
Originally posted by DRW
Since when 3,7K RPM doesn't qualify as midrange on an engine with 7,5K RPM redline? It's clearly evident (from the dyno charts) that the cams produce the most significant gains between 3.7K and 5.5K RPM... Also, the cams gain less at the "ultimate top end" than they lose at 3.5K.
--------------------------------------------------------------------------------
DRW
You can't tell what the top end power is like from that dyno chart because the 16g turbo runs out of steam at 6k rpm. I guess I'm just trying to extrapolate what the dyno would look like if they had used a bigger turbo. What I can see is the HP curve is rising nicely, pulling away from the stock power curve from 5.5k to 6k rpm when all of a sudden at 6k it dives. If you think it's the cams just look at the torque curve, there is a slight downward kink right at 6k, too. The turbo craped out just as the cams were starting to pull hard.
My comment that the Crower stage 3 cams sacrafice midrange power comes from comparing it to cams that make really good midrange power, such as the HKS 264/264 and 264/272. I didn't mean to imply that crowers were worse than stock. Clearly they're not. But since Automotosports comments that the Crower stage3 cams increase lag by 400 to 500 rpm, I'd say that might hurt midrange somewhat.
--------------------------------------------------------------------------------
Taboo
Originally posted by DRW
The HP and torque curves of the Stg3 and 264 cams are fully identical anywhere above the 6K point, yet the 272 cams still outperformed both the 264 and Stg3 cams even past the same RPM point (which is something that shouldn't - according to you - happen since the turbo craped out). One may see - based on this simple fact - that the Stg3 cams are not any more high RPM cams than the 264s (unless the turbo craping out at 6K theory doesn't someohow apply to the 272s).
Furthermore, eventhough the 272s outperformed the Stg3 cams past 6K (which would obviously make them even more high RPM cams than the Stg3 cams in the case of the 16G), they also outperformed the Stg3 cams anywhere from 3K to 4,1K (which would obviously make them even more midrange cams than the Stg3). On the other hand, the Stg3 cams have the smoothest HP and torque curves which might make them more suitable for autocrossers or daily drivers. In any case, literally any combination of the HKS cams will outperform the Stg3 in the midrange and won't be outperformed by the Stg3 cams past 6K.
However, although the 272s will give even the 16G a bit more top end pull than the 264s or the Stg3 cams, I agree that the 264/264 or 264/272 combos would be the best cams for street/strip use with the 16G due to their midrange performance.
--------------------------------------------------------------------------------
