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View Full Version : Seeking Base Tune - 03Z with LS2 402 / V3Ti



Tusc
October 8th, 2019, 06:07 PM
My LS6 ate a lifter and cracked the block, so I had an LS2 402 built which I am picking up this weekend.

This is a 58x build, so I believe I will need to use the LPE signal conversion box for cam and crank position sensors. I'll be mounting the knock sensors (LS1 style) to the block exterior.

It's a simple street build.
402 @ ~10.5:1
Arun Jam Cam
LS7 TB w/ harness adapter
FAST 92
(not sure which MAP sensor is on this car currently)
Siemens Deka #60 injectors
no MAF
and a V3Ti w/ 3.8" pulley for now

Any help getting it started would be appreciated.

joecar
October 8th, 2019, 11:11 PM
Will your engine builder tune your PCM...? He will run the engine on his dyno, get him to run your PCM (and the LPE CKP/CMP converter).

Tusc
October 8th, 2019, 11:54 PM
No, he is a pro machinist who has been building race engines for years for various track sports. I have a few tuners near me of great experience for dialing it in tightly. For now, a functional idle will suffice. In the long run I don't know if I will stick to factory ecu or one of the aftermarket units.

Highlander
October 10th, 2019, 01:15 AM
TRG for the win... works rather well.

Tusc
October 10th, 2019, 02:38 AM
Trg?

Tusc
October 15th, 2019, 07:31 AM
Figured it out after, lol.

Any suggestions on places to look for an approximate base tune to get the car to idle?