No Power at Take-off!

[Ross]

I installed DDIIs, and the DTT TC and VB last week in a friend's 2001 auto. He tells me that sometimes at take off, it smokes like crazy, and has absolutely NO POWER! I'm thinking that maybe it's starting out in 2nd gear. Any opinions?

 

[Mopar-muscle]

did you install the resistor or bills voltage regulator ? if not i'll guess its a second gear start , though the 91% tc does induce a bit of turbo lag .

 

[SixShooter]

hey mopar-muscle, can you tell me what the difference between the 89% and the 91%. I know that the 89 spools up the turbo faster but what about mid and high range? what exactly is the difference?

 

[Bob Wagner]

Never drove a 89% but

91% =

 

[Mopar-muscle]

not sure on the technicals but the 89 will have less turbo lag so i'll guess its a bit tighter , lower stall ??? thanthe 91 , or vice versa , could be higher stall , the factory is about a 76 on bills scale , and its stall is 2700 , the 91 is about 2100 so i guess wit hthis thinking its actually a bit looser ???? my head hurts ... i do know it has less lag , what you will get is a bit more power thru the 91 , run a bit cooler as the fluid coupling is better . you really won't notice the difference unless you run it at the strip , the 93 is quicker than the 91 which is quicker than the 89 ... seriously , most people will be hard pressed to tell the difference between them as 89 vs 91 , 91 vs 93 ... there is a HUGE difference between any of them and stock , and between a milled stator TC ... oops did i say that ...

 

[Ramafid]

The first thing I would look at is the second gear starts. I had this problem also. After the install I noticed a lack of power from a standstill because the converter allows less slippage. I added a DDTTM and the problem was cured. More power always helps!

 

[Snow man]

From what I know,(which isnt much,)I have the 89,my Dad has the 91. I like them both,but I feel the 89 is the much better all arouund convertor. It is looser than the 91,by a little. Off the line,the 89 is quicker,,and smokes a little less than the 91%. It also doesnt jump into gear quite as hard. If you want to come out of the hole quick with the 91,you have to power brake,for 5 seconds to build up boost,then they will rocket out of the hole. Once moving I cant feel any difference between the 89,and 91 at all,they both seem to transfer about the same amount of power,if there is a difference it isnt measurable by the seat of pants ,it would take a dragstrip or dyno to tell the difference. I think the 89 will run cooler in stop and go than the 91,the 91 really strains the engine while going slow,which heats it,and the transmission fluid a lot. IMO the 91,and 93 are for racing only,95% of the trucks should get the 89 IMO. If i had it to do over my dad's would have an 89% in it,without a doubt

 

[chuck3]

Stock

Ross was this a stock truck ?