Anyone Locking in second gear?
#1
Anyone Locking in second gear?
Just curious if anyone has positive results from locking the converter in second gear?
Ive heard that locking at the beginning of third is supposed to be good for a couple tenths and mph....
anyone experiance this?
Ive heard that locking at the beginning of third is supposed to be good for a couple tenths and mph....
anyone experiance this?
#3
FormerVendor
iTrader: (21)
Locking the converter can net you better ET's. It depends on the torque curve and how the converter is setup. A few things to consider. The converter has to be built to take a WOT lock-up - this means multi disk. Secondly having lock up on during a shift is not recommended.
Chris
Chris
#6
#11
Thats typically what breaks input drums. Where the input shaft goes into the drum.
Add a converter with no damening springs and it'll break sooner. Use a converter with springs, it might break the converter.
A few more reasons it's not recommended.
Add a converter with no damening springs and it'll break sooner. Use a converter with springs, it might break the converter.
A few more reasons it's not recommended.
#13
If you have HP Tuners or something you can lock it temp and drive easy down the road. After that you'll understand why it's bad. Slam shifts, solid connection between trans and engine.
#14
Even with the perfect converter it would still seem like the converter should lock up in third at some point to regain the lost power since the rpms will be up in the sweet spot anyway.
#15
I actually dont have a ls1, I have a 96 GT, procharged, 3.73s, 3600 stall, long tubes, handfull of other BS.
I come here because for some reason theres very little auto/ stall converter discussion on the stang forums.
I guess the only real way to get any answers is testing differant setups.
Of course all the real time should be made in the 60 foot time....I wont know what its capable of untill I get some slicks.
Im expecting to take my 60 from 2.0 to 1.7 or so...hopefully some 1.6s
I come here because for some reason theres very little auto/ stall converter discussion on the stang forums.
I guess the only real way to get any answers is testing differant setups.
Of course all the real time should be made in the 60 foot time....I wont know what its capable of untill I get some slicks.
Im expecting to take my 60 from 2.0 to 1.7 or so...hopefully some 1.6s
#16
Thoery and reality sometimes do not get along. One would think that is the case, but the converter is multipling torque up to the higher rpms (although diminishing), this helps ETs. Although it could hurt MPH, but for drag racing ETs rule. Ideally you would want to lock the TCC after the multiplication has levelled out and the fluid coupling is starting to eat efficiency. It could be at the traps, or past it or before it. Only experimentation or testing will find that answer. A lot of work for possibly .1 ET or .5 MPH. I have seen some setups loose ET by locking the converter in 3rd.
#17
Thoery and reality sometimes do not get along. One would think that is the case, but the converter is multipling torque up to the higher rpms (although diminishing), this helps ETs. Although it could hurt MPH, but for drag racing ETs rule. Ideally you would want to lock the TCC after the multiplication has levelled out and the fluid coupling is starting to eat efficiency. It could be at the traps, or past it or before it. Only experimentation or testing will find that answer. A lot of work for possibly .1 ET or .5 MPH. I have seen some setups loose ET by locking the converter in 3rd.
Thanks for the info...but as you said, I need to expirament.
A guy up there said he gained .4 and 5 mph.
Every little bit helps
If I can spend ten minutes writing another lockup schedule and gain .1 or .2 why wouldnt I do it?
My engine has a very small powerband so its pretty noticable when its out of the band.
I pretty much need to keep it between 4k-5500 for the car to go anywhere
If I dont lock the converter soon enough it will rev over 5500 unlocked and I can feel it not really going anywhere. Locking the converter before that point helps me keep my car in the best part of the powerband and I probably gain some power by being locked.
I wont know untill I get to the track and test it but Im thinking I can pick up a couple tenths and mph by locking the converter at the right times
#19
Yes, I do.
I have a 4r70w but it is also built...and the builder tells me it should handle 2nd to 3rd shifting locked up fine...although I dont plan on doing it alot.
The converter is also built for my application with an antiballoon plate and some heavy duty carbon lockup plate I believe
I think it automatically unlocks when it shifts to third anyways
#20
11 Second Club
iTrader: (24)
Lock in 2nd
Im expecting to take my 60 from 2.0 to 1.7 or so...hopefully some 1.6s[/QUOTE]
Locking the converter will not gain anything in your 60', if I'm reading this right. That would be a traction issue. You would be in 1rst gear through the 60' mark. You have a good trans, but you would have to tune the shifts not to bang the trans and driveline parts not to beat themselves apart once locked. The converter acts as a cushion but can be built to be efficient enough not to have to lock in 2nd to gain ET. If you want NO SLIP, get a Clutch Turbo or Clutch Flight. Pop the clutch and shift.
Locking the converter will not gain anything in your 60', if I'm reading this right. That would be a traction issue. You would be in 1rst gear through the 60' mark. You have a good trans, but you would have to tune the shifts not to bang the trans and driveline parts not to beat themselves apart once locked. The converter acts as a cushion but can be built to be efficient enough not to have to lock in 2nd to gain ET. If you want NO SLIP, get a Clutch Turbo or Clutch Flight. Pop the clutch and shift.