I went to the track Sunday with a new combo, and was disappointed with a best of 14.23 at 94.5mph. I'm thinking this combo should run about 13.50 at 100mph, so I dug in last night to begin troubleshooting. Combo is a 355 with flattops, AFR180 heads with 68cc chambers, and a Comp XS262 solid flat tappet cam. Cam specs 224/230 at .050, lift .477/.488.
Compression checked out between 170-175 psi for all 8 cylinders. That's pretty good for a 9:1 motor, correct?
I guess I just need to sort out the carb and ignition. The car was intermittently cutting out on the way home from the track, so I guess I have a little electrical gremlin to track down. The plugs (Champion RC9YC) were pretty fouled to be so new, so I think I'll try one step hotter. Adding to the mystery, when I got around to the passenger side of the engine while removing plugs, I noticed the wire was off of the electric choke on my Holley. Was the car slow (and plugs fouled) because the freaking choke was partially closed? I don't know...I'm not entirely convinced it was the choke, because the idle wasn't high or anything, but I hate to experiment with sparkplugs or carb calibration when it could have been the choke.
Isn't drag racing fun?
Compression checked out between 170-175 psi for all 8 cylinders. That's pretty good for a 9:1 motor, correct?
I guess I just need to sort out the carb and ignition. The car was intermittently cutting out on the way home from the track, so I guess I have a little electrical gremlin to track down. The plugs (Champion RC9YC) were pretty fouled to be so new, so I think I'll try one step hotter. Adding to the mystery, when I got around to the passenger side of the engine while removing plugs, I noticed the wire was off of the electric choke on my Holley. Was the car slow (and plugs fouled) because the freaking choke was partially closed? I don't know...I'm not entirely convinced it was the choke, because the idle wasn't high or anything, but I hate to experiment with sparkplugs or carb calibration when it could have been the choke.
Isn't drag racing fun?
