expanding the 3sgte, time to upgrade! Options

[pittfirefighter]

OK so now that i finally have my 2nd gen 3sgte running right... its time to start with the upgrades...
Now what has already been done:

EGR eliminated
cold start eliminated
TVIS eliminated
custom side feed intake
2.5" intercooler piping with FMIC
Garrett T25 turbo
0.5mm oversized forged JE pistons
eagle forged rods
tial 38mm wastegate
3" custom exhaust
and many other little things
check my profile for full list..

SO as almost anyone with the 2nd gen... first thing that i absolutely wanted to change was the AFM... grrrrr i hate that thing
now there are basically three options:
1. 3rd gen ECU, someone at mr2oc.com sells a full kit to upgrade your stock wiring harness to fit the 3rd gen ECU, its $700 including ecu and new map sensor and much more
2. piggyback ecu (i looked into the Greddy E-manage)
3. full standalone EMS

**** important info on the greddy e-manage****
this thing is not made for the 3sgte... it causes nothing but trouble for it. I recently spoke with Dr. Tweak and he says to stay away as well. Not only is it built poorly for a Toyota engine (it can't interpret some of the ignition signals) but Greddy is also bankrupt so getting help for this thing is nearly impossible... stay away and you will be happy

so after some consideration.. my first upgrade in a string of upgrades is a giant jump but i think well worth it in the end...


let me know what you think!

[lagos]

The problem with the gen3 map setup is that it only understands psi, and not air flow like the afm flapper door.
While it has a ton of benefits over the 2nd gen system, one of its major drawbacks is that it will not be able to correctly scale itself for a bigger turbo like an afm would. So your timing and fuel might be thrown off by a bigger turbo that pushes more air out at __psi vs the ct20b at __psi.

If you can afford an AEM, then god bless you . That is the way to go.
My 2psi.

PS. first you said t25, but your profile says 2871?

This post has been edited by lagos: Dec 18, 2008 - 11:58 PM

[_Jim_]

The problem with the gen3 map setup is that it only understands psi, and not air flow like the afm flapper door.
While it has a ton of benefits over the 2nd gen system, one of its major drawbacks is that it will not be able to correctly scale itself for a bigger turbo like an afm would. So your timing and fuel might be thrown off by a bigger turbo that pushes more air out at __psi vs the ct20b at __psi.

Art, where have you read this? I tried looking it up after you posted but I cant seem to find anything about this. I did find SEVERAL people running SB50 trim turbos setups on there stock GEN3 setups, tho.....and this is with no tuning.

Yes I understand that 355whp is low, maybe. I stated that he suspected around this number because he experienced WI faliure which lead to the demise of his motor, so he never got the chance to make it to the dyno. But based off previous dyno runs (315whp at 16psi) and track times at the HP, compared to 29psi and his last track time at this number, he assumed around 355whp. Boost wont make as much power per pound as it did at lower psi levels, because as Manny said, you go outside its efficiency range.

This post has been edited by _Jim_: Dec 19, 2008 - 3:59 PM