Turbo Tuning

[WicketMike]

i searched alot and couldnt find much help

I am getting a STS turbo installed on my stock T/A right now and i want to make sure i do the tuning right.

Its a 98' so i wont be able to get the EFILive O.S. and i wont be able to get a 2/3 bar.

So how should i got about tuning it to make sure i dont have any problems? here is what i am thinking.

Im going to put WOT afr around 11.3 and timing at 11 at the WOT cells and then move up little by little.

What AFR and timing should i shoot for? 11.5 and 15 degrees?
What area in the octane tables should i edit?

what about part throttle?

thanks

[bink]

Why not buy a 2001 or later PCM?? Wouldn't you be far ahead in the long run?? Just a thought .

I've been looking at the STS Twin Turbo setup for the C5 - With upgraded Garretts and forged bottom end........monster with a capital M. Just dreaming tho.

Cheers,
joel

[WicketMike]

Why not buy a 2001 or later PCM?? Wouldn't you be far ahead in the long run?? Just a thought .

I've been looking at the STS Twin Turbo setup for the C5 - With upgraded Garretts and forged bottom end........monster with a capital M. Just dreaming tho.

Cheers,
joel

isnt there more to it then just buying a later PCM? isnt the harness and wiring different?

If i can just buy a later pcm and plug and play, then i will do it really soon, but in the meantime i need to make sure my tune for now is safe. thanks

[eboggs_jkvl]

Wiring harness is different on the 98 vs any other year. PCM + Appropriate Wiring harness would be needed to upgrade to the 2001 PCM


E

[WicketMike]

how should i scale the Injector flow rate table for the new injectors im getting? they are the ford 42's rated at 43.5 fuel pressure

Ive seen the excel spreadsheets to help scale them, but what about with a turbo.
Do you have to put the amount of boost into the equation somewhere?

[eboggs_jkvl]

I Set and scale my injectors for normal non-wot running. That is where I run most of the time. WOT tuning is different. You need to adjust the fuel for PE or WOT. My rising rate fuel pressure regulator adds 1 PSI of fuel pressure for every 1 PSI of boost. My injectors are set and boost is not a factor in that base setting. My wideband readings at WOT are set via the PE table and I am in the mid 11s for A/F.

[WicketMike]

ive had this link saved from when i had ls1edit
http://www.ls1edit.com/pipermail/ls1...23/003682.html

It says to subtract the amount of boost.
but you just tuned the IFR table like you would N/A. and then tuned the PE for WOT.
which makes since because your not always at full boost.

[eboggs_jkvl]

Boost has nothing to do with scaling the injectors. Why is that even a consideration? You tune the injectors to drive the car under normal conditions. When you have boost, it's only at WOT, so you deal with fuel flow parameters and A/F only when you have both PE and Boost. The injectors simply squirt more as required from commands read from the PE table.

Elmer

[redhardsupra]

injectors will always see the same range of fuel pressure, boost-independent, so just use my IFR spreadsheet and you're good to go. you might wanna verify fuel pressure on the rail before you calculate it though, it's worth to get that much extra precision.

[WicketMike]

im going to tune the IFR table by using the excel spreadsheet, after that should i watch the LTFT's and adjust the IFR table? or do i need to do the AutoVE and tune the VE tables? will the turbo make the VE table be off?