Join Date: Jun 2001
Location: 35.753983 N, 91.634603 W
Edelbrock Performer RPM Heads Are they good heads?
Here ya go. I ran ported D0OE 351 heads years ago on a 302. .030" over, L2249NF-30 TRW pistons, about 11:1 compression, Erson hydraulic flat tappet cam, 239 @ .050 .512" lift, performer RPM intake, 830 HP carb (annular boosters), C4, 3900 stall Fairbanks converter and 4.62 gears in an 8" rear. All that in a '75 Maverick bracket car. With the DO0E heads, it went 10.30's all day long (1000' track) and won a bunch of races.
I won the track championship that year, took the money and bought a set of RPM heads #6025 (old style).
With no other changes, same timing, jetting, intake, etc...ran 9.50 and 107 mph. That's .8 improvement in ET and 9 mph, 1000' of course. Later I added a custom solid roller cam and good ol' timing chain instead of gear drive, rejetted, retarded the timing back to 34. Picked up another .25-.30 and 2 mph. Yeah, it's an extreme example, and the old iron heads were ported by a guy in northern part of the state...who makes some of the fastest factory cast-iron head Ford small blocks in these parts, so he knows what he's doing.
For the money, you can't beat 'em. Great heads. But, the new style heads have the spark plugs located deeper so with the L2249 dome pistons, you'll have to notch the top center of the dome slightly for spark plug clearance. Considering AFR 165's are nearly $1300 depending on where you get 'em (the next best head in the class) you're saving some money...Edelbrocks are around $1050 again depending on where you get 'em. Dad has those old heads now, as well as the solid roller camshaft....and is still xeroxing time slips like I used to do, but now he's running a 331 (mine was always a 302) and running 8.90's at 111 mph. Cant' complain about the heads though. They're still doing their job, 10 years and about 10,000 passes later.