Possable Converter issue
Posted: Sat Jan 11, 2014 11:54 pm
Got a altered weighing 1670lbs. Has a 358ci 15deg sbc making just on 800hp. Makes power to 9100. 495ft lbs at 8350rpm 4.58 rear gear with a 32in tall tyre. powerglide 1.7 first gear. Ive had to conv in this car. I had a converter in the car that was dropping to 7500rpm on the shift and it seemed way to tight. Ideally needing a 8500 conv. But with the first conv after the 1-2 shift would rev up to 9400rpm and drop to 7500 rpm pretty much straight away the rev up to 8300 rpm over the finish line. !/8th mile.
Converter 2. Borrowed a brand new conv off a friend that he has for a spare behind a very similar engine. This time rev it up to 9400 on the shift but once it shifts it drops to 8150rpm. Which is better but here is the strange bit. At 2.6 sec into the run I shift at 9400 but it takes till 3.8sec into the run before it gets down to 8150rpm. So after I shift it takes 1.2 sec before it gradually drops down to the converter then starts to slowly pick up rpm. Pulled the auto out and had it checked. It was perfect. What else can do this. Im only new to looking at N/a converter stuff on loggers but it just seems to me it take 1.2sec for the auto/conv to catch up and it slowly pulls the engine down.
Any other ideas out there. Maybe the engine isn't that health not sure but it seems strange that the tighter converter didn't have that issue.
Any help would be good
Thanks
Converter 2. Borrowed a brand new conv off a friend that he has for a spare behind a very similar engine. This time rev it up to 9400 on the shift but once it shifts it drops to 8150rpm. Which is better but here is the strange bit. At 2.6 sec into the run I shift at 9400 but it takes till 3.8sec into the run before it gets down to 8150rpm. So after I shift it takes 1.2 sec before it gradually drops down to the converter then starts to slowly pick up rpm. Pulled the auto out and had it checked. It was perfect. What else can do this. Im only new to looking at N/a converter stuff on loggers but it just seems to me it take 1.2sec for the auto/conv to catch up and it slowly pulls the engine down.
Any other ideas out there. Maybe the engine isn't that health not sure but it seems strange that the tighter converter didn't have that issue.
Any help would be good
Thanks