BAIN

iTrader: (5)

I posted this in the transmission forum, but didn't get alot of help so I figured I would try it out here

I upgraded from my TCI 3800 to a TCI 4400 on my stock internal car and I think I need to do some adjustments to the shifting. With the shift points where they were with the 3800 the car is slower by about a tenth in the 1/8th mile I'm shifting at 6100 and like I said it's just slower. 60' didn't improve much, mph was down by 1mph and e.t. down by a tenth. Or maybe I just need more time behind the new stall. I only got to run it 1 time with no adjustments to shocks, air pressure, and launch RPM, but being down on mph and e.t. for the corrected times confuses me

Examples of times from the week before with the 3800 and the week after with the 4400.

TCI 3800
11/19 DA= +861'

60'______1.62(spinning)
330'_____4.81
1/8______7.55@89.84mph

Corrected for 0' DA:

7.49@90.65



TCI 4400
11/28 DA= +949'

60'______1.59(felt like a dead hook)
330'_____4.85
1/8______7.58@88.86mph

Corrected for 0' DA:

7.51@89.75mph

Any ideas???

DrkPhx

iTrader: (15)

I assume you stuck with the 2.6 STR of the 3800. According to Kevin Winstead of TCI this upgrade should see about a 2/10 gain. But I think the real benefit will come in a 1/4 mile due to the higher shift extensions (which you should check with Autotap). I also think 3.73 gears would really help with this converter.

BTW - How is the driveability compared to the 3800?

BAIN

iTrader: (5)

Nope, the STR on the 4400 is 2.8 and I already have 3.73 gears running on 26/10/15 ET Drags. I don't have Autotap to check the shift extensions, but on the stock tach is recovers to 5500-5700 after the shifts. I will see if I can borrow Autotap form somebody Friday night when I go to the track. The driveability seems just about the same as the 3800 maybe a tad more loose, but it was already tuned for the 3800.

BAIN

iTrader: (5)

Update:

Went to the track last night and played around with the launch RPM, air pressure, and shock settings.

I figured out the TCI 4400 liked to be stalled up more than flashed. 3000 rpm seemed to work the best I ran a 7.36@90.8mph w/ 1.52 60' . The DA was -469 which corrected is still off my best by .03 e.t. and 1.26mph
Maybe the 4400 ate up some more hp over the 3800. I will find out Sat. when I dyno it again.

02 Silver Z

iTrader: (8)

After one season with my TCI 4400 stock internals and one season with the H/C, I still haven`t figured out how to launch the car. I was running 16" ET Streets w/stock internal and my best 60` was like 1.61. With the H/C the best I`ve been able to do is 1.62 w/15" ET Streets(ET`s are ALOT lower though thank god!!). However, traction is 95% to blame in my case. It may just be you need some more seat time behind the 4400 to figure it out. I`m sure that would help me too. I`m going to try a 27" tire this year and see what that does. For the record, the best DA I`ve raced in was like +2100.

Silent but Violent

Bain, I'm shifting at 6375 rpm's now. Just got tuned form the Milkman. I was shifting at 6300. What gear you running? Don't let those #'s get you down just because you got 1 run in. Take her back and play with your current setup some more!

With the ET Streets on my car 16 psi (cold) was the best pressure. Any less and it would kill my 60' a tad and even a bigger loss running through the traps. Any more pressure than 16 and she would spin. Looks like my new drags like 11-12 (cold)

BAIN

iTrader: (5)

I have 3.73 gears in a 8.8 rear.

I just got it dynoed today and with the 3800 I was putting down 325hp and now with the 4400 it is only making 304hp. I guess I know where the 2 mph went

Got Me SOM

iTrader: (2)

wow are you sure that's all from the converter and not something else?

DrkPhx

iTrader: (15)

Bigger stalls do eat more hp, but that seems like a lot. did you dyno locked and unlocked for each converter? That would help for a better comparison. There was a difference of 18 rwhp between lock and unlocked on my TCI 3800 which translates to 96% efficiency.

FWIW - I just flash the converter from 1500 rpms for launching and have managed 1.57,1.61,162 60-fts.

BAIN

iTrader: (5)

wow are you sure that's all from the converter and not something else?
Nothing else has been changed. Also all runs were also on the same dyno.


There was a difference of 18 rwhp between lock and unlocked on my TCI 3800 which translates to 96% efficiency.
I haven't locked the 4400 yet, but when I locked the 3800 I gained 20hp.