better e.t. without tm
10-25-2007, 05:48 PM
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better e.t. without tm sorry guys i couldn't find anything in the search ,but i was wondering how much of quarter mile e.t. you gain without torque managemant?also i am installing a fuddle p3400, and is it o.k. to take t.m. out . i appreciate any help on this.
10-26-2007, 11:18 AM
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yes it's okay to take the TM out.
e.t. probably isnt effected all that much by JUST t.m. being removed. but in conjunction with a t.c. install - that thing is going to chop down those tenths pretty easily.
e.t. probably isnt effected all that much by JUST t.m. being removed. but in conjunction with a t.c. install - that thing is going to chop down those tenths pretty easily.
10-26-2007, 02:34 PM
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I can't say I have empiracal information regarding gains by removing TM however I KNOW that with my 3800 the TM would kick in HARD between shifts. It's there to protect the powertrain but if you have a big stall it seems likely to inhibit performance to a certain degree.
just my .02.
just my .02.
10-26-2007, 03:53 PM
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I think there's something about higher stall converters that
provokes the TM to be worse. But I don't favor removing it
entirely, I prefer to limit its authority to something livable for
you and the trans instead.
TM is applied only for a portion of the actual shift time. So
if your shift cycle is half a second, the torque-cut is part of
that, and if you cut power completely you see that quarter
second or so compounded downtrack.
But if you picked a more limited spark pullout and had less
than total torque cut you would lose less time. Like dropping
from 400lb-ft to 300lb-ft output for that same quarter-second
you might not even notice.
Thing about cutting torque comletely is, it can also sag the
RPM to where you don't "hit into the converter" and keep the
RPM up while having torque multiplication, instead you fall down
to worse RPM and have to crawl on back up. A more limited
pullback, keeps you closer to best powerband without the
interruption.
I do this by changing the Torque Management, Spark Retard vs
% Torque Reduction table. I allow it only -10 degrees max. So
fall to 15-20 degrees timing through the shifts, not -10 degrees
absolute.
provokes the TM to be worse. But I don't favor removing it
entirely, I prefer to limit its authority to something livable for
you and the trans instead.
TM is applied only for a portion of the actual shift time. So
if your shift cycle is half a second, the torque-cut is part of
that, and if you cut power completely you see that quarter
second or so compounded downtrack.
But if you picked a more limited spark pullout and had less
than total torque cut you would lose less time. Like dropping
from 400lb-ft to 300lb-ft output for that same quarter-second
you might not even notice.
Thing about cutting torque comletely is, it can also sag the
RPM to where you don't "hit into the converter" and keep the
RPM up while having torque multiplication, instead you fall down
to worse RPM and have to crawl on back up. A more limited
pullback, keeps you closer to best powerband without the
interruption.
I do this by changing the Torque Management, Spark Retard vs
% Torque Reduction table. I allow it only -10 degrees max. So
fall to 15-20 degrees timing through the shifts, not -10 degrees
absolute.
