[flexit]

I just switched from c14 to q16.I was told to back timing off 3 to 4 degrees and jet up 5 to 6.Ive got a 620 naturally aspirated w/ a holley 1250.w/ c14 i run 38 degrees timing.any suggestions.ron p.

 

[Uncle Paul]

Do you run an A/F Ratio gage and/or any EGT gages to check to see where things are at?

 

[flexit]

No not yet. I made 5 runs and checked plugs.I was going to watch my mph also.mph was down 2 from 150 to 148.The track was real hot and greasy.not good for testing.ron p.

 

[woodruffracing]

i switched from nos to q16.went up 4 jets and same timing.on a 557 a heads.hope this helps.

 

[flexit]

Thanks, any results?