Performer vs Performer RPM?????????

[D.Hearne]

Well, I was wondering why you didn't say anything. Hadn't realized you've been away so long. ( seems like only yesterday) I feel for you though. Keep your spirits up. Somebody's got to be out there That first car looks suspiciously like a Stang clone. The second car, wasn't bad looking though.------ maybe with a small block Ford under the hood?????? What was it anyway?

 

[70MustangGrande]

First one was a R33 Skyline (I think) and the secind was a hopped up Silvia. Don't tell me you don't know the last one.

 

[mustang70]

My neighbor has a 302 he rebuilt not long ago. He's running the Performer RPM intake, a 600 CFM Edelbrock carb, and a cam I'm not sure of. I do know it has a .484" lift. It sounds good and has plenty of power. He did port his heads though. But it idles smooth and he gets around 20 mpg with a C4. If you want, I can find out what cam he has.

 

[Dark Knight]

my car is weird, even with the AFR heads, the car is quicker with the perfomer than the RPM.. and it pulls to 6k rpm... lost .2 and 2mph in the 1/4 with the RPM.. I DID port match the performer to the AFR heads, in about an hour with a die grinder..

I'd go with a 600cfm carb...

 

[Max Power]

<<The correct way to size a carb is by your engine displacement and the maximum rpms you will rev to. For a 300 cubic inch engine:

RPM 4k 4500 5k 5500 6k 6500
CFM 280 315 350 380 420 450 stock street
CFM 300 350 385 420 462 500 high performance>>

I find that chart misleading. It would suggest that a 300cid engine would never need more than 500cfm, when I think most people know that more carb than that can perform better.

I think it is just a mathematecal chart to indicate how much cfm is necessary to fill cylinders of a given size. But it does not account for rate, and we all know that the faster you can fill cylinders, the better potential for performance.

 

[D.Hearne]

First one was a R33 Skyline (I think) and the secind was a hopped up Silvia. Don't tell me you don't know the last one.

Didn't mention the Mini Cooper, cause it's so BUTT ugly. Think I'd rather have a Yugo ------ NNNOOOOOOTTTTT!!!!