MHP ECU/TCU Thread (updated with v1 gains: Graphs/Spreadsheet Breakdown)
12-19-08, 10:56 AM
#364
I hope that this is a great upgrade! 
i just dont think that for me its realistic to do an upgrade for 4000 plus dollars and not see a tangible item. You know what i mean? i would rather spend and get same power on intake exhaust and learn to tune it like my sti myself or even do a supercharger! 
i just dont think that for me its realistic to do an upgrade for 4000 plus dollars and not see a tangible item. You know what i mean? i would rather spend and get same power on intake exhaust and learn to tune it like my sti myself or even do a supercharger!
12-19-08, 10:59 AM
#365
Pole Position
I hope that this is a great upgrade! i just dont think that for me its realistic to do an upgrade for 4000 plus dollars and not see a tangible item. You know what i mean? i would rather spend and get same power on intake exhaust and learn to tune it like my sti myself or even do a supercharger!
i just dont think that for me its realistic to do an upgrade for 4000 plus dollars and not see a tangible item. You know what i mean? i would rather spend and get same power on intake exhaust and learn to tune it like my sti myself or even do a supercharger! 
Can he send you stickers? Those are tangible enough? 
I guess it wouldn't matter to me but I do sort of understand what you are saying. There's nothing to point to and say "See... that right there is what makes F drive so sweet!".
12-19-08, 01:26 PM
#368
Pole Position
Join Date: Nov 2008
Location: OH
Posts: 320
Likes: 0
Received 0 Likes
on
0 Posts
I hope that this is a great upgrade! i just dont think that for me its realistic to do an upgrade for 4000 plus dollars and not see a tangible item. You know what i mean? i would rather spend and get same power on intake exhaust and learn to tune it like my sti myself or even do a supercharger!
i just dont think that for me its realistic to do an upgrade for 4000 plus dollars and not see a tangible item. You know what i mean? i would rather spend and get same power on intake exhaust and learn to tune it like my sti myself or even do a supercharger! 
12-19-08, 01:55 PM
#370
Pole Position
Join Date: Nov 2008
Location: OH
Posts: 320
Likes: 0
Received 0 Likes
on
0 Posts
Thanks
Andy
12-19-08, 02:37 PM
#371
Lead Lap
iTrader: (2)
Join Date: Oct 2008
Location: Ontario, Canada
Posts: 599
Likes: 0
Received 0 Likes
on
0 Posts
Is it just a matter of the tranny not shifting as well as it could?
I may want to go this route myself.
Cheers
Colin.
12-19-08, 04:32 PM
#372
Pole Position
Join Date: Nov 2008
Location: OH
Posts: 320
Likes: 0
Received 0 Likes
on
0 Posts
Andy, can you quickly sum up what we'd miss just getting the ECU reprogramed and not the TCU.......Is there going to be that much difference in performance (ie power) gain if just the ECU is done?
Is it just a matter of the tranny not shifting as well as it could?
I may want to go this route myself.
Cheers
Colin.
Is it just a matter of the tranny not shifting as well as it could?
I may want to go this route myself.
Cheers
Colin.
In summation what you'd miss not doing complete driveline tuning:
Quicker/faster/firmer up and downshifts (custom shift levels 1-10 at WOT), smoother part throttle shifts, no increase in line pressure, no increase in stall converter speed, no elimination of TCU based torque management (meaning you'll never see the same kind of hp/tq as a ECU&TCU tuned version), no increase in shift point rpm and shift points will only be as consistant as stock.
TCUs take longer to code than ECUs, hence the difference in cost.
Thanks
Andy
12-19-08, 05:30 PM
#373
Lead Lap
iTrader: (2)
Join Date: Oct 2008
Location: Ontario, Canada
Posts: 599
Likes: 0
Received 0 Likes
on
0 Posts
Colin,
In summation what you'd miss not doing complete driveline tuning:
Quicker/faster/firmer up and downshifts (custom shift levels 1-10 at WOT), smoother part throttle shifts, no increase in line pressure, no increase in stall converter speed, no elimination of TCU based torque management (meaning you'll never see the same kind of hp/tq as a ECU&TCU tuned version), no increase in shift point rpm and shift points will only be as consistant as stock.
TCUs take longer to code than ECUs, hence the difference in cost.
Thanks
Andy
In summation what you'd miss not doing complete driveline tuning:
Quicker/faster/firmer up and downshifts (custom shift levels 1-10 at WOT), smoother part throttle shifts, no increase in line pressure, no increase in stall converter speed, no elimination of TCU based torque management (meaning you'll never see the same kind of hp/tq as a ECU&TCU tuned version), no increase in shift point rpm and shift points will only be as consistant as stock.
TCUs take longer to code than ECUs, hence the difference in cost.
Thanks
Andy
I'll probably do something like cssnms suggested and get both done but at different times -- in my case to split the expense up a bit....
Thanks for the explanation.
Colin.
12-19-08, 06:25 PM
#375
Still waiting... 
I was supposed to get both units today, but due to the bad weather up north the delivery was moved to tomorrow. The worst part is that I gave Andy my office address so I could get it right away instead of getting a UPS tag at my door, waste one day, and drive to get it myself from their offices. Now I'll have to wait until Monday because my office is closed tomorrow!!!
Oh well, we have waited for so long to have a Lexus ECU tuned that waiting one more day is nothing. I'll keep you guys posted.
I was supposed to get both units today, but due to the bad weather up north the delivery was moved to tomorrow. The worst part is that I gave Andy my office address so I could get it right away instead of getting a UPS tag at my door, waste one day, and drive to get it myself from their offices. Now I'll have to wait until Monday because my office is closed tomorrow!!!
Oh well, we have waited for so long to have a Lexus ECU tuned that waiting one more day is nothing. I'll keep you guys posted.