Wait, so do you guys lock the converter through shifts?

[Warrant]

I was talking to bison and I guess i should go re read what he was telling me, very knowledgeable person.

Anyways, it sounds like some of you guys lock the converter, and keep it locked through shifting?? I always thought you get into third, then you would lock the converter? Do you lock it up right after the launch or what?

 

[vader87]

Normally half way through second.

 

[TurboDave]

I wait for a second or two into 3rd. There prooved to be way too much bog at the 2-3 shift to lock in anytime in second. For avoiding the pitfalls of the huge 2-3 rpm drop bogging things down, you'd need to be making a lot more HP than I was and spinning something close to 6000rpm at the shift point.
I was only running mid 11's so it severely hurt my times and mph locking before the 2-3 shift. Maybe if the TCC clutch isn't 100% efficient it would slip enough to allow this. Unfortunately I'm running a 7 disc. It is very unforgiving at a 100% efficiencey when locked.

 

[BEATAV8]

I only lock it in 3rd. Trans guy says locked shifts are a good way to break hard parts.

 

[Warrant]

Are all billet parts necessary for WOT L/U in 3rd. What about through shifts?

Thanks

 

[mikestertwo]

Are all billet parts necessary for WOT L/U in 3rd. What about through shifts?

Thanks

Minimum I would use a billet forward drum.

 

[Grumpy]

Are all billet parts necessary for WOT L/U in 3rd. What about through shifts?

Thanks

depends on the power of the car .. mid 11 car we locked it at the line for YEARS .. now its making a little more power high 9s/ low 10s and we just lock it up once we are in 3rd oh ya.. we do have all the good parts in there now

 

[GNVYUS 1]

I literally got my car back from Jimmy's Trans and the guy in front of me snapped the input while locking in 3rd and it was a low 11 car.
So I got one and recommend it if you plan on locking it on 11's and lower.

Hey Dave do you have a before and after time slip from your track lockings?
I personally think the Precisions lock ups are a tad loose and the end of 2nd gear locking would help by 1mph over just third. I might try it if no time slip shows up about this theory and plan on shifting around 5600-5800.

 

[BEATAV8]

I literally got my car back from Jimmy's Trans and the guy in front of me snapped the input while locking in 3rd and it was a low 11 car.
So I got one and recommend it if you plan on locking it on 11's and lower.

That was my Buddy Dave's car. DOH!
That thing locks up tight when it locks. Pulls it down hard!

I like my PTC non-lock though. Loose as a goose at the line but then it couples hard when you move. My 2-3 shift MPH went from 55mph with the Precision to +70mph with the PTC. And only 7.5% slip through the traps.