MHP ECU/TCU Thread (updated with v1 gains: Graphs/Spreadsheet Breakdown)
12-30-08, 09:58 PM
#587
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very interesting...hopefully the 2nd tune turns out even better...oh and if you already have a full exhaust system the ecu/tcu tune doesn't need to take account of the exhaust right? New to this stuff...hehe 
I'll ask my two buddies if they wanna up their HP/TQ on their C63's...lol 
I'll ask my two buddies if they wanna up their HP/TQ on their C63's...lol 
edit: Sorry I missed the exhaust question earlier.
If you mean full exhaust as in longtube to tailpipe, you're going to want to send the ECU back in for a quick A/F tweak. A dynosheet with tailpipe A/F meter would also be very helpful. I run dual widebands in all my cars.
Last edited by MHP; 12-31-08 at 12:34 AM.
12-31-08, 12:38 AM
#588
12-31-08, 01:33 AM
#589
Lexus Champion
We'll squeeze out what we can, there's just not as much left over as in the C63 tunes.
edit: Sorry I missed the exhaust question earlier.
If you mean full exhaust as in longtube to tailpipe, you're going to want to send the ECU back in for a quick A/F tweak. A dynosheet with tailpipe A/F meter would also be very helpful. I run dual widebands in all my cars.
edit: Sorry I missed the exhaust question earlier.
If you mean full exhaust as in longtube to tailpipe, you're going to want to send the ECU back in for a quick A/F tweak. A dynosheet with tailpipe A/F meter would also be very helpful. I run dual widebands in all my cars.
BTW, do you have a vid so we can hear the sound of the C63 exhaust?
12-31-08, 10:04 AM
#592
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I think I'm confused about what exactly is gained with this TCU revamp. Is there any possible way to record/determine if the car is shifting faster or smoother or is it just speculation as of right now. I guess I'm just wondering if an ECU tune was done without a TCU tune, would one really notice less than a .1 second shift time?
Like Juan said prior, it's hard to notice a quicker shift b/c .1 seconds is already a very fast shift. I think my real question is how much is the TCU tune really contributing vs. the ECU tune. Like everyone else, I'm really anxious to see what the 2nd tune and track times show.
Thanks again
Like Juan said prior, it's hard to notice a quicker shift b/c .1 seconds is already a very fast shift. I think my real question is how much is the TCU tune really contributing vs. the ECU tune. Like everyone else, I'm really anxious to see what the 2nd tune and track times show.
Thanks again
12-31-08, 10:27 AM
#593
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I think I'm confused about what exactly is gained with this TCU revamp. Is there any possible way to record/determine if the car is shifting faster or smoother or is it just speculation as of right now. I guess I'm just wondering if an ECU tune was done without a TCU tune, would one really notice less than a .1 second shift time?
Like Juan said prior, it's hard to notice a quicker shift b/c .1 seconds is already a very fast shift. I think my real question is how much is the TCU tune really contributing vs. the ECU tune. Like everyone else, I'm really anxious to see what the 2nd tune and track times show.
Thanks again
Like Juan said prior, it's hard to notice a quicker shift b/c .1 seconds is already a very fast shift. I think my real question is how much is the TCU tune really contributing vs. the ECU tune. Like everyone else, I'm really anxious to see what the 2nd tune and track times show.
Thanks again
Also what we learned with the MB TCUs (we did a TCU only E63 with previous and documented Renntech only ECU) is that there are gains to be had from removing the TCU only tq management. We gained 8/13rw at peak from the TCU only tuning with gains across the board in that specific app. Obviously the gains would likely be smaller with the 5.0L but they will still be there.
Last edited by MHP; 12-31-08 at 10:45 AM.
12-31-08, 10:33 AM
#594
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12-31-08, 01:15 PM
#597
Great info houstonT. As far as I remember your IS-F had the highest HP number, right. Now that you plotted both graphs together it looks like my dyno run has the same curve as yours, but bumped a little throughout the whole power band.
EDIT: Maybe yours wasn't the highest HP number, I think it was caymandiver. I'm not sure anymore.
EDIT: Maybe yours wasn't the highest HP number, I think it was caymandiver. I'm not sure anymore.
