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E40 GTO with ASA Cam and LS3 - Start-up tune
Hi All,
I am in desperate need of help on getting my fresh engine build fired up so I can safely break in my engine. I have experience with very basics of tuning on VE and MAF tables but I am struggling with dialing in the injectors. I have never tuned a modified engine such as this and my attempts clearly show I am doing something wrong.
I know I need a wideband and I am currently waiting on one to arrive but in the meantime using my STFT I am showing my idle trims running +20 in the RED. I do not feel safe running the engine and have only about 1 minute on it to confirm good oil pressure etc. I converted my injector data with the help from this forum to LS3 specs but something is seriously wrong.
So here are my modifications:
ASA CAM 225/236 .525/.525 @110 (Speedway Version)
LS3 Bosch Injectors
Ported 823 Heads PAC 1218 Springs
LY6 Iron Block bored to 4.030 with Flat top Mahle PowerPak Pistons
Balanced Stock Rotating Assembling with 24x Swap
LS3 Intake
Stock LS2 TB
CAI
Cat Delete
Stock LS2 MAF
So I had an LS2 with an ASA cam that I did a little tuning on that I used for my base but then changed my injector data to LS3.
I know if I run the engine anymore I am going to wash my cylinders and the rings wont seat. But even before I get my wideband I need something stable to break this engine in. Any guidance will be appreciated.
I attached a copy of the tune so criticize it all you want. I am open to all opinions so I can finally feel comfortable tuning. Thanks!