Would like some thoughts used a 5000 CTC converter would stall right at 5000 5100 from what I seen yesterday.
Overall I was happy with my car yesterday best run was a 10.56 @ 125.95 in to a real strong cross wind but elevator shaft air. 70 deg, low humidity and 29.3 barometer (sea level setting) (102.6 Canadian local correction 30.2 inches local correction by local weather) track is at 620 feet and my cheap weather station said 575 feet (not a corrected factor like a tag or others give) Like a cool crisp fall day. no track spray to speak of and lots of street cars so I would hook go 4 feet spin then seem fine the rest of the way down.
But seem to drive through the converter in drive for 13% converter slip (if that is what I was feeling shift was firm but RPMs did not drop like normal)
Too much stall for my 3600 lb car and motor??
Funny Ran 10.60 @ 125.17 7400rpm out the end put the timing back 5 deg from 42 and rpm out the end dropped 400 and mph only dropped .6 10.68 @ 124.42 7000rpm then put timing back up to 40 and out the end rpm went up 450 with 1.5 mph gain 10.56 @ 125.96 7450 slip seemed to be 13% then 8% then 13% over those three runs??? all short times were 1.49 (felt if I had no spin they would have been 1.43 to 1.44?? but you take what the track gives! LOL!!!)
Guess go back to last years 4000???
Thanks for any thoughts
Oh
1968 GTX Weighs just north of 3600 with me in it
452 cubic inches
Dana 4.56
11.5 to 1 (94 pump gas)
Normal shift RPM 7500 to 7600
Hand ported Indy SR welded runners opened to max wedge so turned into 440-1 2.25 intake 1.81 ex.
roller 272/282 @ .050 duration .694/.715 lift with 1.6 rockers (cam 110 LSA and in at 100)
Phoenix 29.5 X 11.5 (30.2)
Just wondering would a little more line pressure help a bit with the converter slip if it is that close to the edge where it is 13% normal 8% then back to 13%???
need some help hear guys!
or is a line pressure and a little clutch slip or both???:confused:
Overall I was happy with my car yesterday best run was a 10.56 @ 125.95 in to a real strong cross wind but elevator shaft air. 70 deg, low humidity and 29.3 barometer (sea level setting) (102.6 Canadian local correction 30.2 inches local correction by local weather) track is at 620 feet and my cheap weather station said 575 feet (not a corrected factor like a tag or others give) Like a cool crisp fall day. no track spray to speak of and lots of street cars so I would hook go 4 feet spin then seem fine the rest of the way down.
But seem to drive through the converter in drive for 13% converter slip (if that is what I was feeling shift was firm but RPMs did not drop like normal)
Too much stall for my 3600 lb car and motor??
Funny Ran 10.60 @ 125.17 7400rpm out the end put the timing back 5 deg from 42 and rpm out the end dropped 400 and mph only dropped .6 10.68 @ 124.42 7000rpm then put timing back up to 40 and out the end rpm went up 450 with 1.5 mph gain 10.56 @ 125.96 7450 slip seemed to be 13% then 8% then 13% over those three runs??? all short times were 1.49 (felt if I had no spin they would have been 1.43 to 1.44?? but you take what the track gives! LOL!!!)
Guess go back to last years 4000???
Thanks for any thoughts
Oh
1968 GTX Weighs just north of 3600 with me in it
452 cubic inches
Dana 4.56
11.5 to 1 (94 pump gas)
Normal shift RPM 7500 to 7600
Hand ported Indy SR welded runners opened to max wedge so turned into 440-1 2.25 intake 1.81 ex.
roller 272/282 @ .050 duration .694/.715 lift with 1.6 rockers (cam 110 LSA and in at 100)
Phoenix 29.5 X 11.5 (30.2)
Just wondering would a little more line pressure help a bit with the converter slip if it is that close to the edge where it is 13% normal 8% then back to 13%???
need some help hear guys!
or is a line pressure and a little clutch slip or both???:confused:
