repined cpu from 98 to 02 and changed engine combo. where do I start??

[LS1Nova]

Hi guys, I'm a little confused on what my best course of action is with my setup. The car is a street rod and I originaly had a heads/cam 346 with a 98 computer and painless harness. I used LS1Edit to tune. Well this winter I changed the combo all around. I redid the engine lowering the compression and added twin 62mm turbos. I also purchased efilive V1 and repinned my harness to 99-02 config and installed a 02 computer.
Here are the car specs
346 9.5 - 1 compression
Dart 225 heads
80lb injectors
22x/23x .600" 114
twin precision 6265 62mm turbos
Th400 with transbrake and 4k stall converter

I'm only planning on running about 15 - 20psi. I'm guessing I should be using cos5. What should I do to get this thing fired up and start tuning? Should I add the cos first or wait till after I fire it up? Or should I try to find someone with a similar setup and use that as a base?

Thanks for any advise or guidance,
Frank

[Lextech]

A starter tune from someone with a very similar setup is always nice. But, you could start off with a 2002 COS 3/5 and input your IFR and scale up the main VE table about 20% and the boosted VE about 35% (For Safety). Then tune with a W/B O2 from there.

Jeff

[LS1Nova]

Thanks a ton Jeff!! I just downloaded the tune that was on the computer. I bought it from Jesse at wait4me and it was supposed to have a 02 fbody calibration in it. I have to load an 02 fbody os in there before I can do a cos right? Anyone know where I can find an 02 OS. Mine currently is 12202088

Thanks,
Frank

[joecar]

Goto www.holdencrazy.com and see the 2002 Camaro 12212156 file with the same transmission as yours.

[LS1Nova]

Ok, I loaded the 12212156 os for a 02 manual trans. Where do I actually get the cos5 from? When I click on the tab there is no cos's listed. Sorry for the rookie questions, I'll pick it up quick!

Thanks,
Frank

[joecar]

If you have the latest V7.5 software installed it comes with COS5...

In folder C:\Documents and Settings\Joe\My Documents\EFILive\V7.5\Bins\Custom OS see file 02020005.tun.

Copy this file to your usual Bins folder (i.e. so you edit the copy).


You will need to follow these instructions: showpost.php?p=67875&postcount=243

[joecar]

Don't use the "Upgrade OS" tab in the tune tool.

No worries, all questions are welcome...

[LS1Nova]

hmm, I don't feel so dumb now. I was trying to do it that way and I don't have that file in my cos folder. I checked my software rev and it 7.5.3 build 36. I tried to upgrade and it won't do anything. Tried seting up automatic updates also. I guess my next step is removing it and reloading the latest version??

Thanks,
Frank

[joecar]

Do you have FlashScan V1 or V2...?

If you have V1 then download/install V7.5 from the link below.

If you have V2 then download/install V7.5 and V8.1 from the link below, and update V2 firmware/bootblock (after first carefully reading the attached doc).

From here: showthread.php?t=12587

[LS1Nova]

Do you have FlashScan V1 or V2...?

If you have V1 then download/install V7.5 from the link below.

If you have V2 then download/install V7.5 and V8.1 from the link below, and update V2 firmware/bootblock (after first carefully reading the attached doc).

From here: showthread.php?t=12587

I have V1 with a commercial liscense.

Thanks for all your help!