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Ron Burgundy IV - Manifold Test

Death of a Small-Block

By , Photography by , Grant Peterson
1987 Ford Mustang Fox Edelbrock Performer Rpm Air Gap Manifold

Edelbrock Performer RPM Air Gap
The Performer RPM Air Gap is a great dual-plane manifold that makes power like a single plane, yet keeps the horsepower and torque peaks low in the rpm range. The Air Gap made 38 hp and 17 lb-ft more peak power than the Performer with only a 200-rpm difference in torque peaks. Compared to the single-plane manifolds, the Air Gap made more torque than the Victor Jr. both average and peak, and peaked nearly 1,000 lower in the power band. Against the larger and taller Super Victor, the RPM lost 21 hp peak to peak but held onto 10 lb-ft with nearly 1,000 rpm lower in the powerband.

PN 7521 Price: $257.95
2,600–6,400 rpm 3,200–6,400 rpm*
Avg. HP: 364 393.6
Peak HP: 473 ---
Avg. TQ: 423 432.6
Peak TQ: 456 ---

RPM TQ HP
2,600 359 178
2,800 368 196
3,000 391 223
3,200 408 249
3,400 420 272
3,600 434 297
3,800 448 324
4,000 455 347
4,200 456 364
4,400 453 380
4,600 452 396
4,800 450 411
5,000 447 425
5,200 444 439
5,400 439 452
5,600 431 460
5,800 420 464
6,000 410 469
6,200 401 473
6,400 386 470
AVG. 423 364

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fivepoint-0
 I'd lik to see the same test using the wilson spacer on the rpm airgap intake. I use a funnel web(equal to the super vic) on a 302/5.0 motor in my 90 coupe with tfs 3 cam, ported world sr heads that has very good street manners and drive anywhere with 4.30 gears.
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