PCM Diagnostics & Tuning - EFI Live, trying to tune a turbo LT1.




LT1 POWR
04-25-2012, 11:05 PM
Got a 96 Camaro with a 383 and a TC78. Got it dyno tuned, but I'm trying to get part throttle and idle tuning dialed in. I don't have the wideband hooked up yet, but its on my things to do list as well as boost and fuel pressure gauges. My tuner wants to switch over to hp tuners because he says efi live is missing some tables and that's why I have a fuel issue off idle. I've got the 24X efi connection conversion. Not using a MAF cause apparently I don't need it.

Here are the build spec.

96 Z28 with the following mods:

224/224 .577/.582 114 LSA
LT1 style monoblade throttle body with the LT1 style IAC and TPS sensors. I have a 3 bar MAP sensor.
I have an adjustable fuel pressure regulator set to about 42 psi at idle. Twin in-tank walbro 255lph fuel pumps, one set to come on at about 5-6 psi.
Fuel injectors are Siemen Deka 80lb high impedance injectors.
Ignition is a LSI PCM with D585 truck coils (lower dwell time) and MSD wires with iridium spark plugs gapped at .031"
Rockers are crower 1.65.
Springs are Comp 26094-16. Seat load: 178lbs @1.900''_Open load: 459lbs @1.275_Rate: 449lbs/in
I'm using LS7 lifters with about .00416" preload.
Fans are Flex Lite 410's.
Tranny is a built 4L60E with a 2800 stall.
Rear end is a 12 bolt with 4.11 gears.
Compression ratio should be around 9.2:1.

General Engine Specs

1997 .030" over 350 LT1 out of a Pontiac Firebird
230cc Brodix LT1 Cylinder Heads w/62cc Chambers
Fully CNC ported intake/exhaust/combustion chambers
Cometic "MLS" Head Gaskets
ARP Undercut Head and Main Studs
CP Pistons & Pins - 24cc Dish (Approx. 9.0:1 comp ratio with 62cc heads and .040 gasket)
Total Seal Piston Rings
Manley 5.700" H-Beam Connecting Rods
Callies Billet Steel Splayed 4 Bolt Main Bearing Caps
Callies "Stealth" 4340 3.75" Stroke Crankshaft - Internally Balanced
Fluidampr 7.5 o.d. internal balance 740101
Cloyes Double Roller Timing Chain
Canton Road Race Oil Pan, Melling High Volume (10%) Pump Mel-10552, and Canton Pickup
Trickflow 7.3" Chromemoly One Piece Pushrods TFS-21407300

Any help or tips would be greatly appreciated.


2000RATA
04-26-2012, 05:06 PM
That is alot of seat pressure on that cam if its hydraulic.

LT1 POWR
04-26-2012, 10:30 PM
Everything was speced out by Lloyd Elliot, so I'm sure its ideal for this setup.


gregrob
04-26-2012, 10:38 PM
If you ever get the western side of the state I can help you out.

LT1 POWR
04-26-2012, 10:50 PM
The tuner switched to hp tuners and it idles great now, but I can't get the EFI Live tune back in. I guess we'll have to switch the tables over and use hp tuners alone. EFI Live isn't recognizing the computer and wants me to purchase another license. I have to fix a busted power steering line before anything though.

Ryne @ CMS
04-26-2012, 11:44 PM
The tuner switched to hp tuners and it idles great now, but I can't get the EFI Live tune back in. I guess we'll have to switch the tables over and use hp tuners alone. EFI Live isn't recognizing the computer and wants me to purchase another license. I have to fix a busted power steering line before anything though.

he probably put a hptuners Custom OS on it