Can someone run a desktop Dyno for me please?

[Curt C.]

This motor is the old 385 hp motor with AFR heads. That cam was the flat tappet hydraulic that was used prior to going with a roller. This motor with the supplied vic. jr. thumps out 377 rwhp at 6000 rpm and 354 rwtq at 5000 rpm. The dyno was damn close with respect to HP: 449 x 85% = 381.

see attached dyno


I am trying to figure which manifold is better. Car is a Saturday Night Special that see around 4 weekends of road racing (NASA, SCCA) a year. On the track I shift at around 6200 so the operating range is 4000 - 6000.

Edelbrock says the Air Gap is for 1500 - 6500 and the Vic jr. is for 3500 - 7500. I went back and looked through 5 some years of MM&FF. Almost every dyno-tech story of a small block motor making over 375 hp has a Vic jr. on it. Found two articles that specifically compared the Air Gap to Vic Jr. First article: 302, Windsor Sr heads flowing 275 at .600, XE 282 cam 224/232 duration, 555/565 lift. Westech engine dyno. HP with the Vic peaked at 383 at 5700 versus 374 at 5700 for Air Gap. The vic started picking up HP over the Air Gap at 5100 rpm.

Second article: 306, AFR 185's, XE274hr cam: 224/232, 550 lift. With the Air Gap 425 hp 6000, 390 TQ at 4800rpm. With the Vic, HP was 439 at 6200 and 390 tq at 5200. Cross over was 5200 rpm.

These results lead me to believe that the Vic is a good operator in the 4000 - 6000 range and will probably have more area under the curve than the Air Gap in this range. Everyone seems to believe that if you are not shifting at 7500 you dont need the Victor. No question, the Air Gap has better drivability, but it appears that the Vic has a place on the street as well.

Blykins, save it as a JPEG, shrink it to 400000 bytes or under and attach it in the box at the bottom of the reply page right under "Options"