kruthes1

iTrader: (2)

Roughly how much of a difference does it make to dyno an A-4 car with the TC locked vs unlocked?

offaxis

iTrader: (19)

It really depends on the type of converter.

Below are my old converters and friends converters. I listed the hp difference between locked and unlocked


vig 3200 -------------- 15 hp
Yank pt4000 ---------- 20 hp
vig 3800 -------------- 40 hp
TCS 3200 ------------- 27 hp
Yank ss 3800 ---------- 23 hp

I hope that helps

kruthes1

iTrader: (2)

Thanks it does give me some hope. I am just really bummed that I could't even crack 300 but it was unlocked.

Photochop

iTrader: (74)

TCI 4400 - 29 rwhp

The larger the speed usually the higher the loss, all depends on the brand, etc.

javaradd

iTrader: (17)

I went from 416 locked to 382 unlocked with an SS4000 ..

kruthes1

iTrader: (2)

So I could say that with my 4K I was at least 20HP off being unlocked right?

gman

iTrader: (38)

[QUOTE=kruthes1]Thanks it does give me some hope. I am just really bummed that I could't even crack 300 but it was unlocked.[/QUOTE

My first time on the dyno with the same boltons you have plus a ported throttle body I dynoed 300 at the wheels through a unlocked vig 3600.

john5632

Ijust had my car dynoed it has lthedders ory,lid,flo-mouth,TCI34-3800 stall and put aTR224/112 cam it only did 316 unlocked.My shop retuned it and put in anew map sensor and we'll see in one wk on are next dyno appointment what it does and if we can get it to lock

junior28570

iTrader: (22)

I've done some searching and can't quite get this sorted out.

I had always assumed that the converter is locked @ or near it's stall rating. Can a the converter be controlled through the computer? If running on a dyno locked and unlocked is an option, what would be the purpose of running unlocked vice locked when setting peak performance / WOT?

gman

iTrader: (38)

On the dyno you ussaually lock the converter through the computer while tuning.