Playing with DD2000 and there sure is a huge power increase when using roller cams vs. hyd.

Some AFR 180,64cc heads, a Comp XE266r cam is showing 418HP @ 6000 and 422 ft. lbs of torque @ 4000.

What is involved in putting one in a 327 from a parts standpoint and cost? Are the bigger rollers more streetable than a hyd.

A few months back, one of the hotrod mags did an article on a 66 Nova with an L-79 327 called the "iron butterfly".

Basically, it was an L-79 327 with the addition of a roller cam (can't remember the specs.),very similar to the one you mentioned.

The end result was 408HP and great torque for a 327. The only drawback was the cost of going to the roller cam. Which brought the total cost of the engine build to around $2,500.00 (porting the original 462 iron heads).

It sounds like a sweet little 327 setup... smile.gif

Mark P.

the cost of retrofit roller lifters is pretty high... getting a cam and lifters for a non-roller block is around $500+

With a roller, you can go with a little more duration and have the car act the same down low as a smaller flat-tappet hydraulic from what I understand.

Drawbacks are these... some have mentioned durability problems with the roller lifters. Also, the hydro-roller lifters are very heavy, which will limit your rpm potential if you planned on revving the motor high.

John mentioned rev limitations with hyd. rollers. There is a company (which is right on the tip of my tongue) that makes what they call a "Hydra-Rev" kit. It's a setup that allows a hyd. roller to rev higher. There are springs you install in the lifter valley that put additional tension on the lifters. If I'm remembering right, they claimed up to 7000rpm. From what I've heard, it works pretty well.

Surely somebody else here knows what I'm talking about and will remember the details.

Chad

I read a lot on this and sure wish someone would try it. From everything I've read it's pretty easy to get 400 hp and TQ from a 327 with a good roller it. Unfortunatly the cost is around $1,000 to do it.

The down side is, you can get within about 20 hp and TQ of what a roller can give you with a good solid for about $150

Don't rely too heavily on DD2k when picking a cam type. After all, the program cannot differentiate between a solid roller and a hydraulic roller. We all KNOW a solid roller should run much harder than a hydraulic roller, but the program for some reason does not. :rolleyes:

If price is at all a concern I would seriously consider going with a solid flat tappet like the Comp XS274. The ramps are just as agressive (if not more agressive) than comparable hydraulic rollers so power output should be pretty close for a LOT less money.

Just my opinion.

AFR make the hydra rev kit for the roller engines. I belive in the CHP mag there 327 had a rev kit but it was a different company than AFR. They all work the same.

Eric, does Comp make an Xtreme series line of solid cams? I cant find it anywhere, I only see magnum