Vic Jr Flange height

[RET_COP]

Can someone give me the Carb flange height difference between a Victor Jr and a Performer RPM.
This is for a 351w.
Thanks , Lou

[Rick Parker]

RPM Performer is 5.3/4.3 front to rear. The dimensions taken at the extreme ends of the manifold with a straight edge on the carb pad. Victor JR is 5.59 non angle cut. This is for a 9.5 deck block.
The Victor JR manifold is a very good manifold. In a light car such as Cobra very little is sacrificed on low end. I used one on a 289 and used a drop center air cleaner. It ran great.

[RET_COP]

Thanks Rick, I agree, in a light car with a 5-speed it's worth the change. I'm going to see if I can get one on my car without interference. I cut the divider and added a 4 hole spacer to my performer RPM and the car felt better through mid range and high rpms. I lost nothing at all in the low rpms. That was my indication that I could move to an open plenum and be ok.
Since I went to bigger primaries my engine just want's to breath, so breath it will.

[vatdevil]

From my notes.
Performer. 4.30/5.30
Air gap. 5.31/6.19
Victor jr. 5.75/5.75

Dynoed my motor with Air Gap and Victor Jr. Air Gap posted higher numbers up to 5000 rpm and Victor Jr slightly better above that but not enough to make up the loss down low. I do run an open spacer on the Air Gap. Motor is 351 with performer RPM heads and QF 750 carb.

[RET_COP]

Ahhh -The open spacer!!
Put a 4 hole above the open spacer and see what happens to the low end.
Thanks for the info Vatdevil