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Discussion Starter · #1 ·
Finally got my new 489 down the track. A couple of weeks ago I attended the North Texas Chevelle Clubs spring drag meet at Denton, Texas. Went to unload the car and it wouldnt hardly run. Changed the plugs and got it to clear up then things went south again. The carb went to dumping fuel like crazy. A quick thanks to the guys who helped me try and get down the track. I got disgusted and loaded the car back on the trailer. Got the car back home and sent the carb to the shop. Got the carb back and the guy told me there was a bunch of brown crap in the carb. Went to put everything back together, cleaned all fuel lines, found nothing, and changed the fuel pressure regulator. Last Friday I took the car to my local track and got to make 4 passes.

1st Pass
60' 2.0697
330' 5.7305
1/8th 8.4251
87.77 mph

2nd Pass
60' 1.9149
330' 5.1954
1/8th 7.7659
93.01 mph

3rd Pass
60' 2.087
330' 5.4672
1/8th 8.1376
91.15 mph

4th and Last Pass
60' 1.5825
330' 4.6611
1/8th 7.2389
93.56 mph


The first pass was pretty scary, car skated around a bit right off the line then got plum squirrely at about 200', had to burp the throttle to get it to settle down then completed the pass. As you can tell with the next 2 passes traction was also a big issue. On the last pass I finally got some heat into the Mickey Thompson Drag Radials. It still spun just a touch but not much. A little more fine tuning and some suspension tuning, maybe I can dip into the sixes. I want to thank Chris at C & D Performance and Mike Lewis for the help and parts.
 

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66 El Camino 57 Chevy pickup 2004 Tahoe
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MPH is an indication of horsepower. ET is an indication of traction. The pass with the 1.91 60' time had ET of 7.76. The pass with the 1.58 60' time had an ET of 7.24, 1/2 second quicker.

The MPH are about the same because the car had about the same HP on both runs.
 

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Discussion Starter · #4 ·
Its always a thrill to take your new motor down the track for the 1st time. Even if it is a little harry. I'm going to try and hit the track tomorrow evening. Hopefully I can get some more consistent times.
 

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Could you post your combo?

Thanks,
Adam
 

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Congrats Chris!!
 

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Discussion Starter · #8 ·
Thanks Jason. Here is my combo so you dont have to read through the other thread. Thanks Rmchevelle posting the link.

489 BBC,
a Gen V .030 over 454 block, 4 bolt mains, Eagle 4340 crank, Eagle H-beam rods, .JE/SRP pistons, Comp
Cams solid roller with .680 in/.680 ex lift, duration is @ 50 253 in/ 261 ex, 110 deg lobe centers, Comp roller lifters,
Harland Sharp roller rockers, Brodix BB-2 plus aluminum heads 2.25in / 1.89 ex valves, Brodix single plane
high rise intake, Holley 850 DP, Mallory ignition system
 
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