Jetting on proform 950

[w69440]

Hi i`m changing intaces on my 446. Going from a tunnelram with 660`s to a indy singelplane with a 950.
Is there anyone who has rekomondations on jetting? I`m bying a proform 950 race carb.

Engine:446
fully ported stock heads
11:1 comp
MP cam 324`/620 lift
10`3500 converter
4.56 gear
28`tire
3300 lbs car

[Mefirst]

Cant tell you any jet recomendations.. but if you buy a brand new carb, the factory jetting is usually quite close.. How ever, if you want to tune the carb to perfection...

This is how I tuned mine (Holley Dominator), buy a AFR gauge, Summit has a good deal on a kit, start out fat and lean it out.. Try to get the AFR close to 14.7 at idle, 13.5 something at part throttle and at WOT 12.6 something... Go over 14.7 then your engine is running lean...

/Tom

[firefighter3931]

Use the stock jetting as a baseline and adjust from there. 



Ron