Stock 248/248 cams vs Schrick 292/284 cams
Last weekend I did my 10000 mile valve checkup to make sure valves clearances are still in spec and everything else is ok under the valve cover.
Camshaft looked perfect, no pitting and lobes didn’t show any wear. Same goes for buckets, shims and Titanium retainers.
Clearances were also within spec, little looser than the spec but close enough. Looser is always better than tight what comes to valves. Noisy, but you know they are working …
Then I though, why not to make a comparison between the stock OEM camshafts and the Schrick cams? So, now stock oem cams are in.
Let's take a look at the torque. Remember, these are torque and horsepower numbers measured with Race-Technology DL1 device.
Theory how it works is here
So, torque is shown here. Below 4400 rpm mild stock cams have more torque but then Schrick cams show the advantage.
Peak torque, 173.7 lbft is at 6027rpm and is pretty flat all the way to 7000rpm. Difference in torque is 24lbft, advantage Schrick.
Now, let's look at horsepower.
Horsepower is pretty much even up to 5000, then Schrick cams give more power. Max Rear Wheel power with stock cams is about 193 hp at 6900rpm,
With Schrick cams, 223hp at 7000rpm. Difference about 30RWHP compared to stock.
So, what comes to performance, Schrick wins by 30RWHP, 24lbft. But there are other differences too.
248 cams have better idle and engine is better to drive on the street when revs are low. Difference in intake vacuum is about 10kPa at idle.
If you have done similar tests, I would be interested to see if my results are anywhere close.