At first, I was thinking on staying with my stock heads on my sb350 which has 8.5CR and upgrading to the XE262 cam. I am now considering the world products s/r torquers which are 67cc heads vs the 76cc heads I now have. Would I benefit more staying with the xe262 cam or maybe the xe268? The CR bumps to 9.3 with the 67cc heads and the DCR is pretty much the same with either cam. So Octane rating should be about the same. This is my daily driver. It seems like the 262 cam puts a little more torque down low than the 268. Any comments

My dad has a set of S/R's on a 350 that runs mid 12's with a smooth idling solid lift cam. I think they are a good head but depending on you gear and converter you may want to look at the sportsman II's. If you buy a set of any kind preassembled, take them down, clean them and oil the guides. My Darts were dirty and dry.

Originally posted by Brian Z:
The CR bumps to 9.3 with the 67cc heads and the DCR is pretty much the same with either cam. <snip> It seems like the 262 cam puts a little more torque down low than the 268. Any comments I think that you should go with the 67cc chambers. The choice of cam depends on whether you want the torque down low or up high. If you're more concerned with daily driving, go with the 262. If you prefer more high-speed power, go with the 262 or even a 272 with a higher stall-speed converter.

There are a lot more issues than CR to consider. Total weight, gear ratio, transmission, rear gear, and tire size have to be considered.

Wile the S/R Torquer is a good head...

If I was looking at running that mild of a cam, and not planning to go much bigger,I would get a set of Vortec's.
They should make more low and midrange torque in the RPM range that you would cruise at on the street.

Maby try a set of Pro Topline Vortec's,they probably flow a bit better than the GM version.

While I am concerned with daily driving, just like anyone else, I want as much as I can have and still drive it every day. I am planning on 3.36 gears and maybe a 2200-2400 stall converter. I hope with that combo I'll at least be in the 13 sec. range. I dont want to be one of the slower cars at the occasional trip to the track for test and tune/grudge races.

I have the XE268 cam in my 400 with around a 2500 stall and 3.73 gears. Its very drivable and has plenty of low end grunt. It has a very slight idle and pulls 16 inches of vacumn @ around 900 rpm. I was told that with each 50 cubes the next smaller cam in the catalog acts about the same. This motor was an experiment to see how well a small camed motor would run. IMO its all in the heads, if you put better heads on the motor and the 262 cam, it would run better than with OK heads and the 268. If you decide to stay with the SRs, I would at least perform a bowl job. I think either cam would work well, with the nod to the 262 for a daily driver cam in a 350.

9.3 compression,2400 stall,and 3.36 gears

I would go with a cam that has an intake duration of 216-218 at .050.

My 3200 pound El Camino daily driver-355,10.2:1,3.42 gear,26 tall tire,TCI 2400 stall and a HYD cam 278 221 467 110.

I also had 202/160 S/R Torquers,pocket ported.
It ran great on the street.Ran a best of 13.01-104 with a slipping trans.

I also tried two other cams
Isky 280 Megga cam 280 232 485 108
CompCams 280 Magnum 280 230 480 110

Both cams didn't produce enough bottom end torque with the 2400 stall and 3.42's.
When I switched to the Cam Dynamics 278 H it was a night and day difference in lite to lite driveability.Very easy to drive,very streetable.
Made enough vacuum to run my power steering and power breaks.

With more weight,less compression,less gear,and a taller tire...Like I said look for an intake duration of 216-218 at .050

Also the Vortec heads flow very well and they have a 194 intake valve wich maintains better throttle responce and torque in the range you will be using with that cam.Not to mention a better combustion chamber.
They don't have that hot of an exhaust port though.You might want to look for a cam with a bit more spread on it that the Comp XE line.I would look for the exhaust duration to be about 10 degrees larger with Vortec's.

Either way make sure you get 1 5/8 headers.

Just my personal belief smile.gif