-
2 Attachment(s)
5.3 turbo start up tune
Hi guys,
I'm new to boosted motors and I'm wondering if any experts can look at my start up/idle tune/log and provide some feedback. It's a 3 bar SD setup. T76 turbo, 224/224 cam with 110lsa, 4l60e (I will most likely do a 4l80 soon), 80# decapped injectors.
I'm curious about kPa at idle and vacuum. i setup a boost/vacuum gauge and i'm seeing -9.30 for vacuum at idle. And it's lean, which I'll work on. I know I need to work on VE tuning and spark, but i'm just making sure I'm off to a decent start.
Appreciate any comments or thoughts you have.
-
What MAP are you using?
Your map kpa on key on and when you shut it off is rather high at 105-106kpa. It should match where you live. Like 100kpa key on engine off would be at around sea level.
-
It's an LS1 style 3 bar MAP from EFI source.
-
1 Attachment(s)
Any other insight on this? My truck runs perfectly, but my gauge is seeing about 11psi boost, but my MAP is seeing about 6 ish (140kpa)
My idle is about 70kpa also with a Sloppy stage 2
Attachment 96331
-
sounds like maybe a Chinese knockoff MAP sensor was used instead of a GM unit... or the scaling is wrong... or both.
-
I sorta had the same thoughts, but I bought this from EFI source, the truck 3 bar map.
-
-
Yeah, it's exactly what I said it would be... a Chinese / non-GM unit. When a legit, GM, ZL1 MAP sensor is under $40, there's just no excuse for using junk like this. There's places to save a $ and places where you should never. Although de-capped injectors are being discussed in this thread, so it's likely my feedback will be lost lol.
-
Huh, I thought I was getting a tested and true unit because I didn't want to run into this shit. I thought EFI source was reputable.
-
OK you got me for a sensor and harness adapter.
These look correct?
linear 312.50
offset -11.25
See if I can smash this thing on a truck manifold somehow.
Thanks
