Editing Openai/695c4a9d-28a0-800d-9f93-cab63ec35c09 (section)

=== Assistant: Perfect — that explains everything 👍 ===
Perfect — that explains everything 👍
Thanks for confirming.

So these are 1/8-mile passes only, with you lifting and coasting to the turnout. That means the 1/4-mile ET and MPH are meaningless and we should ignore them completely.

Let’s analyze this correctly as true 1/8-mile data.

==== ### ====
* 60 ft: 1.474
* 330: 4.426
* 1/8 ET: 6.895
* 1/8 MPH: 98.92

===== - 60 ft: 1.491 =====
* 330: 4.391
* 1/8 ET: 6.851
* 1/8 MPH: 99.20

Consistency is excellent — only .044 ET and .28 mph spread.

==== ### ====

A 1.47–1.49 60-foot is no joke.

That tells me:
* Suspension geometry is right
* Tires are working
* Converter flashes cleanly
* You’re not blowing the tire off or bogging

There is very little ET left in the first 60 ft without radical changes.

===== - 60–330 ft gain is very linear =====
* No sign of nose-over
* Second pass actually picks up MPH, meaning the tune is happy

This looks like a torque-rich Buick doing Buick things 💪

===== A general rule: =====

: 

So:
* 99 mph × 1.26 ≈ 124–125 mph

ET conversion:

: 

So:
* 6.85 × 1.57 ≈ 10.75
* 6.90 × 1.57 ≈ 10.83

===== 10.7–10.9 @ 124–126 mph in good air =====

That aligns VERY well with your ~600 hp Buick combo.

==== ### ====

Focus on:
* Converter flash (launch RPM vs torque peak)
* Shift RPM (Buicks usually want earlier than Chevy)
* Rear gear (too much gear can slow MPH)

You’re already efficient early — gains now come from power under the curve, not more launch violence.

===== You picked up .28 mph on the second pass with nearly identical ET: =====
* That suggests the engine wanted a touch more RPM
* Or you cleaned up the shift slightly

That’s a good sign — not a warning.

==== What are: ====
* Rear gear ratio
* Converter stall
* Shift RPM
* Tire type & size

With those, I can tell you:
* If the car is over-geared or under-geared
* Exactly where to shift
* Whether a converter change is worth ET or just money

Bottom line:
👉 This is a legit mid-6.8s / 1.47-60 ft car. You’re very close to the sweet spot.