Canadian1968
Well-Known Member
After adding a rear meter block to my 3310 holley carb, to try and bring my WOT , A/F ratio down from 10.5. I noticed now that I can feel the secondary circuit open. It more noticeable when I am on the street playing around , then when at the track . But I can defiantly feel the secondaries coming in .
I did improve my track times down to a 13.22 from a 13.45 . I fell most of it is coming from an improved launch though ( was able to cut a 1.96 60Ft on the street tire ) . I was able to clock a new personal best of 105.22 compared to a 104.8 in cooler weather.
My question is , I have a vacuum gauge installed on the dash, when I hit WOT the thing snaps to 0 as it should .
Will putting in a lighter spring change anything? I mean anything past 0 is boost which is impossible with NA.
I currently have the silver (plain) spring in which according to holley spec, on a 402 is fully open @ 7000RPM , I am reving to 5300ish and yes its 446CID not 402. But looking at the chart offered by holley, approx 50 CID is good for 1000 RPM in opening rate, so I feel like I am close to fully opening all the way.
I know only one way to find out is put it in and test. I just like talking about theory sometimes !!!
Plus I am officially bitten with the drag race bug. On the list next year is some cheater/ slicks !
I did improve my track times down to a 13.22 from a 13.45 . I fell most of it is coming from an improved launch though ( was able to cut a 1.96 60Ft on the street tire ) . I was able to clock a new personal best of 105.22 compared to a 104.8 in cooler weather.
My question is , I have a vacuum gauge installed on the dash, when I hit WOT the thing snaps to 0 as it should .
Will putting in a lighter spring change anything? I mean anything past 0 is boost which is impossible with NA.
I currently have the silver (plain) spring in which according to holley spec, on a 402 is fully open @ 7000RPM , I am reving to 5300ish and yes its 446CID not 402. But looking at the chart offered by holley, approx 50 CID is good for 1000 RPM in opening rate, so I feel like I am close to fully opening all the way.
I know only one way to find out is put it in and test. I just like talking about theory sometimes !!!
Plus I am officially bitten with the drag race bug. On the list next year is some cheater/ slicks !