1955 Chevrolet Q/SA Build

Lyn Smith · 10-23-2023, 09:25 AM

Took the 55 to the Indy Fall Classic and it is running a little better with a string of consistent 13.65s at nearly 97 mph runs in testing and qualifying. The air was not that great, and an ever changing wind direction (head wind on sunday) was a pain. I really had to steer the silver brick when I passed the grandstands with the cross wind on friday. LOL. With the installation of a play back tach I can really see the lack of convertor flash stall in first gear. It jumps up to around 4800, then continues a seemingly slow rise to my 7200 shift point. I'm going to send the convertor back to ATI to see if they can get that initial stall to around 5400. On the dyno sheets the difference in horsepower between 4800 and 5400 is over 30 horsepower so a looser unit has got to help.This weekend I hope to try one of the 8 inch convertors Larry Hill has loaned me. I didn't last long in eliminations as I lifted a little to early against Robin Lawence's number 1 qualifying Mustang and gave him a early Christmas gift. Oh well there is always next year. More info next week if I get to test one of Larry's units behind the metric 200.

10-23-2023, 09:25 AM	#31
Lyn Smith VIP Member Join Date: Dec 2001 Location: Pontiac,il. Posts: 1,199 Likes: 282 Liked 967 Times in 194 Posts	Re: 1955 Chevrolet Q/SA Build Took the 55 to the Indy Fall Classic and it is running a little better with a string of consistent 13.65s at nearly 97 mph runs in testing and qualifying. The air was not that great, and an ever changing wind direction (head wind on sunday) was a pain. I really had to steer the silver brick when I passed the grandstands with the cross wind on friday. LOL. With the installation of a play back tach I can really see the lack of convertor flash stall in first gear. It jumps up to around 4800, then continues a seemingly slow rise to my 7200 shift point. I'm going to send the convertor back to ATI to see if they can get that initial stall to around 5400. On the dyno sheets the difference in horsepower between 4800 and 5400 is over 30 horsepower so a looser unit has got to help.This weekend I hope to try one of the 8 inch convertors Larry Hill has loaned me. I didn't last long in eliminations as I lifted a little to early against Robin Lawence's number 1 qualifying Mustang and gave him a early Christmas gift. Oh well there is always next year. More info next week if I get to test one of Larry's units behind the metric 200.