tirefryin_s10

iTrader: (3)

So over the winter I swapped from a stock geared th400 to a 1.80 straight cut powerglide in a reid case, the car feels good and drives good and even seems to be running good numbers so far but the datalog looks strange and almost look like a 3 speed, the car does not seem like it wants to 60 foot very good either. Although I did not hit it with a whole lot of power yet either.



The car went 1.34 60fts with the th400 and ran 8.62@159



The combo:



1979 zephyr street car (3300ish lbs)

8.8 with 3.31 gear

275 drag radial

Trans specialties 3000 powerglide

column shift

PTC 9.5 custom converter

John deere Hyguard fluid

370 cid LSX

Twin 76mm turbos



2step set at 4400, launched on only 3psi



1.44 60 ft

3.72 330ft

5.64 1/8th et

127.75 1/8th mph

7.30 1000'

8.72 1/4 et

159.01 1/4 mph



If you look at the picture here the car comes off the trans brake and climbs up to 6295 rpm and then pulls down to 5925 rpm before starting to climb again in 1st gear. The logs look the same on all of the passes I made and 60 fts were about the same on most as well.



I am wondering if this is an issue in the converter or with the band adjustment on the side of the trans? or possibly something else?



Just curious what the gurus think.



You can hear it clear as day in this videos as well.



http://www.youtube.com/user/Black02X.../0/5nzMgIuBM1w

Boosted One

iTrader: (6)

Sure it's not hazing the tires on the launch? I would assume you don't have a speed sensor to log mph do you? You have a video where you can see the tires?

onfire

iTrader: (17)

Same converter in both trans? What's the time lapse between off the 2step and the 6295rpm? Could be converter flash if it's no time.

black98ws6ta

iTrader: (77)

To me it sounds like it is bogging alittle after the initial converter flash. What does the slip look like out the back door? I would put more power to it or gear it more(if it can take the rpm on the topend).

tirefryin_s10

iTrader: (3)

Everyone seems to be telling me put more power to it lol I guess that is what I will try!

01Z28Camaro

Looks like you have a little bit of KR on your 1 - 2 shift. 1000 shift extension so I'm assuming it's not to loose on the converter. Not sure how the band could be the issue, I thought that was used for gear engagement when you shift.

Fireball

iTrader: (21)

you need to be closer to 6psi on launch

Fireball

iTrader: (21)

band holds it in first gear

but I doubt its band related...

tirefryin_s10

iTrader: (3)

I will try hitting it harder, the car was 60 footing really soft but it would spin a little ways out so I will slow the controller down a bit but increase launch boost.