MS4 Cam only dyno numbers
WTF??? Without locking it mechanically, its gonna slip. Dont know what you mean there.
Unless you turned the solenoid off, its gonna lock on its own, and if you run it from a high enough speed it wont downshift, and wont kick the lockup off.
I run cars everyday. That run looks locked. Whether you're manually locking it or not, by the rpm it looks high enough to be locked automatically, and stay locked.
Furthermore, theres no hump in the torque band which would be there with an unlocked stall.
Unless you turned the solenoid off, its gonna lock on its own, and if you run it from a high enough speed it wont downshift, and wont kick the lockup off.
I run cars everyday. That run looks locked. Whether you're manually locking it or not, by the rpm it looks high enough to be locked automatically, and stay locked.
Furthermore, theres no hump in the torque band which would be there with an unlocked stall.
.Btw, there was another SS there last night. He was also full bolt ons and running a smaller cam. He was around the mid to low 13's at about 108mph. He was having traction issues, but the mph show how bad a night it actually was. I run again in feb. and get some 11's for you guys on street tires.
Teching In
Joined: Oct 2007
Posts: 29
Likes: 0
Originally Posted by Doward
Wrong. No hydraulic fluid coupling provides 100% transfer without a mechanical lockup.
Here's a link for you to check out: http://auto.howstuffworks.com/torque-converter.htm
Without the lockup solenoid, the pump ALWAYS spins faster than the turbine - hence, slippage and waste of torque (and horsepower, since hp = (torque * rpm) / 5252
I've seen ALOT of dyno runs and that looks locked..Tq is almost in all cases higher with an unlocked verter,it spikes and then drops like a rock
Sorry bro I agree with Edcmat on this one...
Car ran very well though
Sorry bro I agree with Edcmat on this one...
Car ran very well though
I've done this on cars that I was scared were making too much power on a stock tranny or whatever as opposed to just nailing it up on the converter and getting the nice torque spike like alot of people do unlocked.
This guys dyno graph is actually a pretty short "window" compared to most posted here. His numbers sound right too because without the flash, you dont get the torque (in fact you get very low torque).
Most Tuners Turn Off Wot Lockup Until A Very High Mph Or Just Completly Turn It Off
That Being Said Most Converters Cant Lockup At Wot That Well
Havent Checked A Stock Tune But I Wouldent Think Anyone Would Let A Stall Lockup At Wot
Unless Its A Converter Spefically Built For That Abuse Its Definately Overly Abusive For The Converter
That Being Said Most Converters Cant Lockup At Wot That Well
Havent Checked A Stock Tune But I Wouldent Think Anyone Would Let A Stall Lockup At Wot
Unless Its A Converter Spefically Built For That Abuse Its Definately Overly Abusive For The Converter
Teching In
Joined: Oct 2007
Posts: 29
Likes: 0
Most Tuners Turn Off Wot Lockup Until A Very High Mph Or Just Completly Turn It Off
That Being Said Most Converters Cant Lockup At Wot That Well
Havent Checked A Stock Tune But I Wouldent Think Anyone Would Let A Stall Lockup At Wot
Unless Its A Converter Spefically Built For That Abuse Its Definately Overly Abusive For The Converter
That Being Said Most Converters Cant Lockup At Wot That Well
Havent Checked A Stock Tune But I Wouldent Think Anyone Would Let A Stall Lockup At Wot
Unless Its A Converter Spefically Built For That Abuse Its Definately Overly Abusive For The Converter
It's been my experience that the lockup gets busted when trying to shift while locked up... the car doesn't lock up between shifts - it locks up around 5500 in 2nd gear, unlocks, shifts to 3rd, and locks back up around 4500 (unlocking again if he were to ever shift into 4th under WOT - aka 155+)
He's telling me the converter IS built for lockup under WOT. Eh, it's his car, I just push the buttons
SSP - That's exactly what happened. Rolled into it (Kevin on the dyno made a comment that the 4l60e wouldn't be lasting long with the car, either, lol - personally, I'm more worried about repeated 1.9x 60's on street tires grenading the 10 bolt!)
Most Tuners Turn Off Wot Lockup Until A Very High Mph Or Just Completly Turn It Off
That Being Said Most Converters Cant Lockup At Wot That Well
Havent Checked A Stock Tune But I Wouldent Think Anyone Would Let A Stall Lockup At Wot
Unless Its A Converter Spefically Built For That Abuse Its Definately Overly Abusive For The Converter
That Being Said Most Converters Cant Lockup At Wot That Well
Havent Checked A Stock Tune But I Wouldent Think Anyone Would Let A Stall Lockup At Wot
Unless Its A Converter Spefically Built For That Abuse Its Definately Overly Abusive For The Converter
Otherwise lockup is reserved for cruise fuel economy. Tech II's and most tuning/scanning software (or even a toggle switch or button) can manually lock it up which is what people do on a dyno to better "stabilize" the numbers or help compare to a six-speed curve.
I think the other posters may have been misreading "lockup" as like the stall point maybe?
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Verdad Gallardo It's been my experience that the lockup gets busted when trying to shift while locked up... the car doesn't lock up between shifts - it locks up around 5500 in 2nd gear, unlocks, shifts to 3rd, and locks back up around 4500 (unlocking again if he were to ever shift into 4th under WOT - aka 155+)
I did have a guy build me a converter for a turbo Buick that I would lock at the top of 2nd and leave locked. The 2-3 shift would about break your neck.
It still looks locked but I agree it could be a slow rolling into the throttle type run
When u do that the line doesnt get so skewed or drop like a rock,I could be mistaken.
Its all good the car ran well
Keep at it
When u do that the line doesnt get so skewed or drop like a rock,I could be mistaken.
Its all good the car ran well
Keep at it
Teching In
Joined: Oct 2007
Posts: 29
Likes: 0
SSP, so far so good with the lockup timing. I think I've got it pretty well (I've got tons of experience tuning OBD-1 systems, but OBD-2 is new for me. And I really can't stand the HP tuners program, but eh - you play the cards in your hand )
I must admit that the OBD-2 system in these cars is pretty nice. I honestly would never have though I could get a 111 LSA cam idling that smooth!
)I must admit that the OBD-2 system in these cars is pretty nice. I honestly would never have though I could get a 111 LSA cam idling that smooth!
Just an update to this thread for anyone searching. I no longer have the car, but I did learn that the ls6 intake was leaking while I did these dyno runs. After I fixed that I also added 3.73 gears and Nitto DR's. Best mph was 115mph in about 75 degree weather. Backed that up a few times with other 115mph runs. In warmer weather she'd be consistant 113-114 mph at around 12.0x's.
