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Discussion Starter #1
2700 lb door car 1168 hp 565 bbc 1.80 glide 4.57 gear 33x16 slick. Car is laying over at shift and has been progressively getting slower. Playback shows 4700 launch 6300 flash 8000 shift 6800 fall back after fall back rpms rise to 7000 rpms and then fall to 6500 and start to rise again. what is causing second fall back. This is a new combination. First passes were 8,30's at 168 then a 8.70 150 to a 8.22 151 now it will only muster 8.50's at 149-150 consistenely
 

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Discussion Starter #5
Motor is brand new and valve springs, carb, fuel pressure are all good. the 60's are consistantly 1.24. when the problen first arrised the 1/8 incrementals were always about the same. 1,24 60 3.43,330 5.22 1/8 135 mph give or take a feww hundreths. On the last couple of passes, mph in the 1/8 has been dropping to about 130. Motor sounds clean , no misss hicups etc , just seems to lay over at the shift.
 

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Mine has acted kind of like this with the broke sealing rings on the input shaft. Car still launched fairly well, just slipped quite a bit down track. Mid track or so motor would rev up and then back down acting like the tranny was trying to grab.
 
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