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Short version - I believe the 60' is the bottom line. Get a 1.48 or better and you'll be easy 9s. The MPH is there, anything over about 136 - 137 has enough power for a 9 second pass. MPH over that is gravy.
Long version:
I love digging in to this kinda stuff, so forgive my enthusiasm LOL. My opinion is the issue is your 60'. You can add power and the MPH will go up, but your ET doesn't change much until the 60' comes down. If you could get a 1.48 60' you'd have easy 9s and everything below 1.48 is more gravy. I had the same trouble with mine a while back and started focusing on the 60' for this season and it made a BIG difference. In my situation, I had to pull power at the launch to get the 60' dialed in. Mike knows how to do this so ask him about it. Over last winter I added the AAD drag pack suspension and custom alignment and that has seemed like a game changer for me. I had low 1.4x 60' back in the spring, but we'll see how it does in warmer weather at ChallengerFest.
The STKR is odd. If you took timing out and it went away, then it is likely real knock and the kind of stair step appearance in the log would also indicate it is real. I think the reason it's so much is due to a multiplier table that's used at higher RPM. Can you have someone watch you make a pass at the track and focus on your exhaust? Real knock will present as little puffs of smoke from the exhaust.
What's the actual mix if your fuel, what brand is being used, etc? My theory is that with the IAT the fuel is giving up at it's current octane level and a little knock starts to occur and then the high rpm multiplier kicks on and the party's over.
I have been running Renegade brand RM109 unleaded race fuel for many years. Here are the specs to compare to yours. I run it full tilt without any 93 in the tank or at least as empty as I can get it (like barely making it to the track parking lot before it dies from no fuel LOL )
https://renegaderacefuel.com/produc...9-high-density-blend-blue-renegade-race-fuel/
Long version:
I love digging in to this kinda stuff, so forgive my enthusiasm LOL. My opinion is the issue is your 60'. You can add power and the MPH will go up, but your ET doesn't change much until the 60' comes down. If you could get a 1.48 60' you'd have easy 9s and everything below 1.48 is more gravy. I had the same trouble with mine a while back and started focusing on the 60' for this season and it made a BIG difference. In my situation, I had to pull power at the launch to get the 60' dialed in. Mike knows how to do this so ask him about it. Over last winter I added the AAD drag pack suspension and custom alignment and that has seemed like a game changer for me. I had low 1.4x 60' back in the spring, but we'll see how it does in warmer weather at ChallengerFest.
The STKR is odd. If you took timing out and it went away, then it is likely real knock and the kind of stair step appearance in the log would also indicate it is real. I think the reason it's so much is due to a multiplier table that's used at higher RPM. Can you have someone watch you make a pass at the track and focus on your exhaust? Real knock will present as little puffs of smoke from the exhaust.
What's the actual mix if your fuel, what brand is being used, etc? My theory is that with the IAT the fuel is giving up at it's current octane level and a little knock starts to occur and then the high rpm multiplier kicks on and the party's over.
I have been running Renegade brand RM109 unleaded race fuel for many years. Here are the specs to compare to yours. I run it full tilt without any 93 in the tank or at least as empty as I can get it (like barely making it to the track parking lot before it dies from no fuel LOL )
https://renegaderacefuel.com/produc...9-high-density-blend-blue-renegade-race-fuel/
- Octane – R+M/2 107
- Motor Octane 100
- Research Octane 114
- Specific Gravity 0.723
- RVP 6.7
- Oxygenated 9.6%
- Unleaded Yes
- Stoich Ratio 13.57:1
- Color Blue
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