69 Cuda with 8.5:1 340/727

3.91s

RPM intake

750 Holley

stock J heads

Hughes Whiplash cam

Intake Valve Lift 1.5
Exhaust Valve Lift 1.5 .512"
.518"

Intake Valve Lift 1.6
Exhaust Valve Lift 1.6 .546"
.552"

Intake Duration at .050"
Exhaust Duration at .050" 223°
236°

Lobe Separation Angle 107º

Intake Opening at .050"
Exhaust Opening at .050" 7.5° BTC
48° BBC

Intake Closing at .050"
Exhaust Closing at .050" 35.5° ABC
8° ATC

Last year at the Classics it ran a best of 13.26 @ 103 with a stock converter and 215/70/14 rear tires. 60 ft times were 2.0s at best. This year it has a tight 10" converter and 275/50/15 M/T drag radials. With that cam and converter combo and hooking up hard, what kind of gains do you think I could expect at the Classics in a couple of weeks? Not looking for exact, this is just for fun. 13.10s? 13.00? 12.9?

What do you think?

Thanks

12.85

Depends on the conv but 12.60s

Depending on the weather but, I'll say 12.90 @ 104 MPH
Doesn't that car weigh like 3400+ lbs?

From my personal experience, a 10th off the 60ft times equals a 10th and a half off the ET. So, if the converter and drag radials get you down to a 1.75 60ft, I'd say 12.85 or so.

I'll guess 12.90

I thing 12.6's 12.7's for sure.

12.80

Quote:

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This year, the spare tire and jack are removed. The back seat will also be out for the Classics while it's being reupholstered.

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Those are no small changes. How much weight is that? Weather conditions play a big part when trying to compare results as well.

I'll guess 12.93 @ 104.5.

I ran my first 12.9 pass on 103 MPH...when you hook you may lose some MPH but the weight loss and good converter should more than make up for it.

Good lookin car.
12.99 @ 104

These guys are really being optimistic, i like that, that will be a time slip for the laminator.

I know I gained 2 tenths when I went to a sticky tire and also agree what comes off of your 60' so goes the e.t.. Assuming the converter is an upgrade, stalls better and is more efficient through the traps..............

I'd say bustin' into the 12.90's (or better) is no problem.

We are likin the sounds of that.

The air wasn't the greatest today, but 13.16 @ 103. Red light first round in the gambler's race, but would have broke out anyway. Best 60ft was 1.89 on the last run. Hoping for better air during time trials in the morning...and maybe a 12.9 or so. Either way, great first day.

your not MPHing real good how is your jetting too rick or too lean can kill it!!

You can look at that either way.... Either he's not MPHing real well, OR.... Damn!, he's getting out of the hole quick for a car that only goes 103!!! My car ran 13.7's at 101 last year.

I run 12.5s @ 104, soon to be 12.4s

Congrats on the new best, get that 60ft. down & it'll be in the 12s.

Pretty good air this morning, at least in western PA. Let us know how it goes.