LS7 intake limit
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Joined: Jun 2007
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With just a good port match, an LS7 motor that I know very well, made within 9hp from 6500 to 7600 with a 90mm throttle body...opening it up for a 92mm made only a handful more. The dyno pulls were stopped at 7600 for long-term durability. Look for that pump gas, hydraulic cam motor in a certain red Firebird soon. Numbers did not quite start with a '7'. Now, after that tease, details later.
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Staging Lane
Joined: Oct 2007
Posts: 89
Likes: 1
Staging Lane
Joined: Oct 2007
Posts: 89
Likes: 1
the XER lobs are aggressive to the point where the higher RPM range tends to float the valves. the lobs are more geared to a solid cam where killer spring pressure is not a problem. the XER for example you really don't want to go past a 244 dur even a 240 dur would be more suitable and this is why you see 400 motors with a 238/244 having +2 in the came so you can shift at 6200 and stay away from 6600 plus that's where the damage happens XER is great for the mid hp area. there are other cams out that are better but not fully released yet but them aggressive lobs are how you get a edge with a N/A car in turbo super charged world
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From: Shawnee (Shawmpton), OKlahoma
