MHP ECU/TCU Thread (updated with v1 gains: Graphs/Spreadsheet Breakdown)
#243
Lexus Champion
iTrader: (5)
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
Andy, I PMed you with some info. Basically I'll be shipping my ECU this weekend (probably Friday), I'll send you tracking information. Very important, please take good care of this ECU and good luck hacking it.
I'll post pictures of the removal process as well as any markings on the ECU itself (I guess all of them are the same, not different revisions, but just in case).
Wish me luck people...
I'll post pictures of the removal process as well as any markings on the ECU itself (I guess all of them are the same, not different revisions, but just in case).
Wish me luck people...
#245
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
Andy, I PMed you with some info. Basically I'll be shipping my ECU this weekend (probably Friday), I'll send you tracking information. Very important, please take good care of this ECU and good luck hacking it.
I'll post pictures of the removal process as well as any markings on the ECU itself (I guess all of them are the same, not different revisions, but just in case).
Wish me luck people...
I'll post pictures of the removal process as well as any markings on the ECU itself (I guess all of them are the same, not different revisions, but just in case).
Wish me luck people...
#246
#247
Tech Info Resource
![](https://www.clublexus.com/forums/images/ranks/rank-smod2.gif)
iTrader: (2)
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
This might be helpful. Best of luck guys.
#248
Lexus Champion
iTrader: (9)
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
More and more excited each and every time I check into this thread!!! Question to you MHP, is in the first post I saw numbers of about $4500 for the tune...this can't be right can it?
M5's are getting tuned by Dinan at a cost of around $1500, or something like that. I'm very encouraged to have this done, however cost is the only issue.
Keep us updated. Or will you not know exactly until you have done the entire reprogram?
Thanks!
![Uhh...](https://www.clublexus.com/forums/images/smilies/1387914497.gif)
Keep us updated. Or will you not know exactly until you have done the entire reprogram?
Thanks!
![Woot](https://www.clublexus.com/forums/images/smilies/woot.gif)
#249
Pole Position
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
I just checked with Sterling McCall Lexus here in Houston about the cost and availability of a new ECM for my F. The cost is $1264.70, and they could not tell me what the delivery is. It might be as much as six weeks.
CL sponsoring Dealers ---- What price can you get one for me, and how soon?
Pat
CL sponsoring Dealers ---- What price can you get one for me, and how soon?
Pat
#250
Lexus Test Driver
iTrader: (11)
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
ECU (they call it ECM) from Carson Toyota sell for $974
http://www.trademotion.com/partlocat...layCatalogid=0
http://www.trademotion.com/partlocat...layCatalogid=0
#251
Tech Info Resource
![](https://www.clublexus.com/forums/images/ranks/rank-smod2.gif)
iTrader: (2)
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
ECU (they call it ECM) from Carson Toyota sell for $974
http://www.trademotion.com/partlocat...layCatalogid=0
http://www.trademotion.com/partlocat...layCatalogid=0
Also interesting how many Lexus dealers charge more than MSRP for parts (sometimes a LOT more). I've walked out because of this in Atlanta.
Last edited by lobuxracer; 12-10-08 at 05:09 PM.
#252
Pole Position
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
My thought is: If Andy's control mods make the additional hp improves the trans shifts as he expects, I will buy a spare ECU/ECM module and have him program it. I will then be able to switch them out at will.
Would be fun to take the car to the track and make one run with the standard ECU/ECM and then with the modified and see the difference.
Would be fun to take the car to the track and make one run with the standard ECU/ECM and then with the modified and see the difference.
#253
Tech Info Resource
![](https://www.clublexus.com/forums/images/ranks/rank-smod2.gif)
iTrader: (2)
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
My thought is: If Andy's control mods make the additional hp improves the trans shifts as he expects, I will buy a spare ECU/ECM module and have him program it. I will then be able to switch them out at will.
Would be fun to take the car to the track and make one run with the standard ECU/ECM and then with the modified and see the difference.
Would be fun to take the car to the track and make one run with the standard ECU/ECM and then with the modified and see the difference.
Just food for thought if you decide to do this comparison.
Some other food for thought - the timing retard on the dyno test is pretty obvious. It might be possible to eliminate this without any changes to the timing maps, and it might also be the result of heat soak on the dyno that does not exist on the street (or track). I've been able to recover lost timing just by changing coolant/water ratios in the cooling system, and while I do like the longevity of the pink stuff Toyco sells now, the longlife doesn't mean it's an ideal coolant for high performance.
Another really important consideration - while most of the rest of the country can buy 93 octane without a problem, California residents can't. Two octane points makes a big difference in allowable error for ignition timing. So if this tune is optimized for a "49 state" fuel, California will require a different tune, and in all likelihood, will not see the same benefits as the owners in the rest of the country.
Last edited by lobuxracer; 12-10-08 at 06:27 PM.