Aluminum vs Iron compression on pump gas

Well, no, but, hummmm, If I look in the old performance tips sction, the M-1 single plane intake is recomended to the 11 second bracket. Now, I'll turn some pages to the recomended cam for 11's ... flip flip flip flip...


A mechanical 655 for the 11.5 and the 657 for the 11 second build. Flip flip flip flip flip

655 specs out to be; 296/.557 with a duration @ .050 of 251.6
657 specs out to be; 312/.590 with a duration @ .050 of 265.2
(Hummm, big cams and I'll take a stab and say 3,000 - 7,000 rpm)

Hummmm Now, if I go over to Comp Cams to kind of match up the duration @ .050 specs to there extreme high lift cams for a comparo... Click click click....

Hyd. 3000 to 6800 20-229-4 XE295HL 295 307 251 257 .564 .564 110º
Oh wait, that's a Hyd. but I'll leave it up for food for thought.

.022 .022 3000 to 6500 294S 294 294 248 248 .525 .525 110º
OH wait, that's a Magnum cam. Hummm, take notes now..... scroll scroll scroll

Heres the drag race cams;

SOLID-3500+ converter inin 340. Needs single plane intake and
10.5:1 compression. Excellent low end and mid-range torque.360 or 3800+

.020 .022
3500 to 6500
(Adv. duration / @ .050/ ....lift/ .........centerline)
281 299 ..........252 262... .542 .555 ...106º




SOLID-318-340. 4000+ stall 750 CFM,manifold. 4.88 gear. 10.5:1 & up
compression.
.026 .028
4000 to 7000
290 290 255 255 .540 .540 106°

SOLID-Best all around bracket cam. 4000+ converter in 360 or 4300+ stall
in 340, min compression ratio is 11:1.

.020 .022
4000 to 7000
290 304 260 266 .558 .555 106º

SOLID-4500 converter in 360 4800+ stall in 340, 11.5:1 compression.
.018 .020
4300 to 7400
312 266 274 .570 .572 106º


SOLID-Good Super Street or fast bracket cam.Works best with 12:1 compression and 5000 + converter.

.018 .020
4500 to 7500
300 316 270 278 .579 .578 108º

Take it for what it's worth.