Independent cam testing
Originally Posted by revolagoy
Noize,
Is there no difference between the cam combinations because at you and Paul's level of mods the difference will not be evident? I am wondering why HKS would make these different cam combos if they essentially produce the same results. I am wondering at what level of mods you would see the differences in the different cam combos?
I am thinking of getting cams next and there is so so so much misinformation about the combinations that it makes a decision really tough. I would like to have quick spool and a wide powerband from 3000 - 7500rpm with good low to mid torque. Basically a street only car. Any suggestions?
Thanks for a good post!
Is there no difference between the cam combinations because at you and Paul's level of mods the difference will not be evident? I am wondering why HKS would make these different cam combos if they essentially produce the same results. I am wondering at what level of mods you would see the differences in the different cam combos?
I am thinking of getting cams next and there is so so so much misinformation about the combinations that it makes a decision really tough. I would like to have quick spool and a wide powerband from 3000 - 7500rpm with good low to mid torque. Basically a street only car. Any suggestions?
Thanks for a good post!
Evolving Member
Joined: Apr 2004
Posts: 122
Likes: 0
Thank for the advice. I know this may be premature, but any thoughts on which cams would work with the new WR turbo from FP?
Originally Posted by Noize
I think we're almost as far as we can go with 16Gs. The reason there wasn't any change IMO is because the only difference is 8 degrees of duration with identical lift. If I had it to do over, I'd just buy 264s again. That said, I don't have any worse idle quality with the 272 exhaust cam whatsoever.
Yeah, that was a lot of labor for just a little improvement on my car, and none to Noize's. Props to Andrew @ Dyno4mance for all his help, and patience while we ate up room in his shop tinkering for 3 HP here and there like a couple of Honda guys! 
Originally Posted by ShapeGSX
The limit for flow with a 16G is the compressor inlet. You just can't fit any more air through the compressor inlet at ambient pressure.
Evolved Member
Joined: Jan 2003
Posts: 1,121
Likes: 1
Originally Posted by atlvalet
Are you saying it can't flow anymore with the compressor inlet (because the WR does) or are you saying you can't get anymore in there without the compressor side heating up the air significantly?
A compressor's maximum mass airflow is mainly determined by the compressor's inducer area available to airflow. Note that the shank and any area taken up by the fins is not available to aiflow! The Evo's compressor has a much smaller shank than most turbos, so it can flow a lot more air than most turbos that have a similar inducer diameter.
This is part of the reason why Buschur has been banging his head with the reverse rotation 20G wheel. He kept the big shank diameter that the original 20G had. He should have made it a small shank like the 16G6 compressor has. It would have helped. A 16G6 compressor already flows very close to what a 20G compressor does.
