Author Topic: New personal best  (Read 3910 times)

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Offline 428 CJ hardtops

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New personal best
« on: November 08, 2009, 02:37:18 pm »
I have been running my R code drag pack coupe a bunch lately to try to get it into the 12.30's in pure stock trim.I got a 12.43 at 109.8 a week ago with a 1.82 60 ft time on a humid for the season night.Last sunday i went a 12.47 at 109.5 with a 1.89 60 ft .Usualy any time picked up in the 60 ft is doubled in the et .The track was not real good it was a cool day and the bite was iffy.  Yesturday I went to Muncie my local favourite track.65 degrees but a steady 25 mph headwind all day.I had jetted the primarys up to 68 and the rears were already 3 sizes up at 81 .I got a pair of 12.50 passes and finaly a 12.46 at 108.8 mph it also went a 1.79 60 ft time.That without the head wind should have been a low 12.30 something pass.On that pass I finaly remembered to look at the AF meter and it was 14.5 way lean 12.5 is about right.It time to jet the primarys up a couple more sizes and hopefully get out to a nice sun warmed track at least one more time this year .I know on a descent conditioned day it will go very low 12.30's maybee even a 12.20 something .Guess I beter take off the repo 2 1/4 70 style Mustang exhuast and invest in a 2 1/2 inch mandrell bent free flowing system,getting a new set of tires instead of the 4 year old ones .2010 will be a fun year with my coupe. http://artactiongraphics.com/Track-photos/US41/11-01-09/IMG_3022.jpg
had many 428 CJ and SCJ cars over the last 30 years.I currently own a 68 1/2 coupe and a 69 R code SCJ Coupe and a 70 R code SCJ Cougar Eliminator .I am looking for a 70 428 coupe if anybody knows of one for sale.

4284spd

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Re: New personal best
« Reply #1 on: November 08, 2009, 06:45:42 pm »
Congrats!

Offline geraldt52

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Re: New personal best
« Reply #2 on: November 09, 2009, 02:01:41 pm »
Still with 4.11s, 428 CJ Hardtops?  That really is fantastic.

Offline 428 CJ hardtops

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Re: New personal best
« Reply #3 on: November 09, 2009, 02:26:59 pm »
Yes it has the same 4.11 posi.shift at 5800 rpm go through the traps at 6200rpm.40 degres total timing ,might try up a couple and down a couple to see what works best.Lots of things to tweak but a real good starting point .I know its got a low 12.30 something or high 12.20 in it yet it track conditions alow it .Steve
had many 428 CJ and SCJ cars over the last 30 years.I currently own a 68 1/2 coupe and a 69 R code SCJ Coupe and a 70 R code SCJ Cougar Eliminator .I am looking for a 70 428 coupe if anybody knows of one for sale.

Offline geraldt52

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Re: New personal best
« Reply #4 on: November 09, 2009, 07:49:36 pm »
...On that pass I finaly remembered to look at the AF meter and it was 14.5 way lean 12.5 is about right...

Steve, are you using an O2 sensor (with a bung in the H pipe?) with an in-car readout?  Have you found that to be pretty accurate?  Do you recall the manufacturer/source for that setup?

Guess I beter take off the repo 2 1/4 70 style Mustang exhuast...

Are you currently using the 2 1/4 repro mufflers too, or something better?

Offline 428 CJ hardtops

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Re: New personal best
« Reply #5 on: November 09, 2009, 10:04:28 pm »
The AF meter is a cheap one I do not remember the brand off hand,it does have a sensor bung in the pipe.I am not realy sure how accurate it is.The LM1 in my Fairlane is much better.The h pipe and everything but the Hooker areochamber mufflers are the repro 70 style exhuast.Its got a bunch more in it.I jetted the front up to 70 size jets today and raised the float level a bit on Barrie Pooles advice.He built the short block and got me the better valve springs.He is a great source of info and help.Steve
had many 428 CJ and SCJ cars over the last 30 years.I currently own a 68 1/2 coupe and a 69 R code SCJ Coupe and a 70 R code SCJ Cougar Eliminator .I am looking for a 70 428 coupe if anybody knows of one for sale.

Offline RAM AIR

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Re: New personal best
« Reply #6 on: November 11, 2009, 04:03:50 pm »
Steve,GOOD JOB! Levittown,Jimmy Let's work on those Fairlane times too!

Offline 428 CJ hardtops

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Re: New personal best
« Reply #7 on: November 11, 2009, 06:42:03 pm »
Sorry it took so long the AF meter is a K&N set up.I dont know how accrurate it is but it showed lean and it seems pluasible in descent air this time of year and jetted only a few jet sizes up from stock.The Fairlane torque converter is out to get fixed and hopefully it will get back and still get some passes before the end of the year.Steve
had many 428 CJ and SCJ cars over the last 30 years.I currently own a 68 1/2 coupe and a 69 R code SCJ Coupe and a 70 R code SCJ Cougar Eliminator .I am looking for a 70 428 coupe if anybody knows of one for sale.

Offline geraldt52

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Re: New personal best
« Reply #8 on: November 11, 2009, 07:08:41 pm »
Thanks, Steve.  I appreciate you keeping us posted on your results...

Offline cjjeff

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Re: New personal best
« Reply #9 on: November 12, 2009, 01:31:09 am »
Thanks, Steve.  I appreciate you keeping us posted on your results...

Ditto here! Hope to see one of the F.A.S.T. races next year with my brother. We have been wanting to go for years, time to plan!

What would be the best one to go to if I can only see one?

I'm working on the Black Magic car digging out the engine parts to go to the machine shop, getting a toploader soon...
Got CJ on the Christmas list to Santa...!
Previous owner of:
"Black Magic" 1970 R code Sportsroof
"Black Magic II" 1990 Mustang 5.0 LX Coupe
Currently own:
1967 Mustang GT fastback A code 4 speed

Offline 428 CJ hardtops

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Re: New personal best
« Reply #10 on: November 12, 2009, 11:51:19 am »
The Martin Michigan race is a real good one in june every year 2 day event lots of cars.Next years races havent been posted yet.FASTraces.org is the website.
had many 428 CJ and SCJ cars over the last 30 years.I currently own a 68 1/2 coupe and a 69 R code SCJ Coupe and a 70 R code SCJ Cougar Eliminator .I am looking for a 70 428 coupe if anybody knows of one for sale.

Offline 428 CJ hardtops

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Re: New personal best
« Reply #11 on: November 15, 2009, 05:10:57 pm »
I ran at Muncie In on saturday and relowered my personal best to 12.42 there was a 15-20 mph headwind again so the mph was only 108.49 .On that run I lowered my tire pressure to 30 lbs and recorded a 1.77 60 ft time.I finaly jetted it up more but the conditions just wouldn't net me a much sought after 12.30 something. http://artactiongraphics.com/Track-photos/US41/11-01-09/IMG_3022.jpg
had many 428 CJ and SCJ cars over the last 30 years.I currently own a 68 1/2 coupe and a 69 R code SCJ Coupe and a 70 R code SCJ Cougar Eliminator .I am looking for a 70 428 coupe if anybody knows of one for sale.

Offline George

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Re: New personal best
« Reply #12 on: December 16, 2009, 05:55:12 pm »
Steve nice burnout in the Magazine,nice to see guys beating on there Cobrajet's.
1967 GT500 # 624 NIGHTMIST BLUE 4 SPEED
1968 1/2 FASTBACK HIGHLAND GREEN 3.91 4 SPEED (STONE PONY) ex drag car.
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Offline Brian Conway

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Re: New personal best
« Reply #13 on: December 23, 2009, 09:55:34 am »
What size wheels and tires are you using?  Thanks,  Brian
65 5R09A 4 spd  GT  Built 5/29/65 
69 9T02R 4 spd  SCJ Built 9/19/68
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Offline 428 CJ hardtops

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Re: New personal best
« Reply #14 on: December 23, 2009, 11:23:15 am »
They are stock Ford chrome GT 14 by 6 wheels with a G-70-14 repo Polyglass tires. I have gone a best 60 ft of 1.77  on them.
had many 428 CJ and SCJ cars over the last 30 years.I currently own a 68 1/2 coupe and a 69 R code SCJ Coupe and a 70 R code SCJ Cougar Eliminator .I am looking for a 70 428 coupe if anybody knows of one for sale.