A base tune for a Corvette LS3 swap?

[PBRstreetgang]

Hi all, does anyone have a base tune for a 2002 C5 Z06 Corvette w/ Gen 3 engine harness wiring and ECM but with a LS3 495hp GM Crate motor? Just to get it running.

All stock engine except headers, No cats, 2 forward O2 sensors only, GM LS2 throttle body, GM stock 430hp injectors, stock fuel pump and Vararam intake. THX Brian!

* Compression ratio of 10.7:1
* Recommended fuel is 92 octane
* Cast aluminum block with 6-bolt cross-bolted main caps
* Nodular iron crankshaft
* Powdered metal connecting rods
* Hypereutectic aluminum pistons
* Steel hydraulic roller tappet camshaft
* Valve lift of 0.525 in. for intake and exhaust
* Duration at 0.050 in. is 219 degrees intake and 228 degrees exhaust
* Lobe separation angle is 112 degrees
* Combustion chamber volume is 68cc
* Valve diameter is 2.165 in. for the intake and 1.590 in. for exhaust
* Cast roller trunnion rocker arms with a 1.7:1 ratio
* Internally balanced
* 58x Gen IV reluctor wheel

[abc]

I think you may have gotten yourself into a pickle with the 58x crank. I assume the pro's will step in but I think your gonna need a Gen 4 PCM which then becomes an issue with the rest of the car assuming you want to keep the rest of the car functioning? Sounds like your gonna need one of those conversion adapters for the crank sensor.

Other than that should be fairly easy to make it start, add some BRAF (base running air flow) and some idle timing and it will start and be ready to tune.

[edcmat-l1]

Need a Lingenfelter box.

[RDF1]

Need a Lingenfelter box.

UGH.. i never had any good luck with them things.

[edcmat-l1]

UGH.. i never had any good luck with them things.

I've used them many times and have had zero failures. I know of a couple off the top of my head that are in service now years later. One of them going on 10 years.

[Ls1c5vette]

Look in my other posts from yesterday and you?ll see my tune so you have an idea. My cam is way bigger than the GMPP cam. There are a few GMPP crate LS3 tunes in the tune repository on here as well. I did a LS3 swap a couple months ago but put a 24x wheel on my crank cause I didn?t want to mess with the converter box.

[Fast4.7]

Your going to need larger injectors as well if they are the stock LS6 units.

[edcmat-l1]

Look in my other posts from yesterday and you?ll see my tune so you have an idea. My cam is way bigger than the GMPP cam. There are a few GMPP crate LS3 tunes in the tune repository on here as well. I did a LS3 swap a couple months ago but put a 24x wheel on my crank cause I didn?t want to mess with the converter box.

How bout you post it here instead of making people go looking for it? You're the one asking for help. Don't require others to do the leg work.

[Alvin]

I've also never seen a bad LPE 58 to 24 box.

[PBRstreetgang]

Yeah I got the Lingenfelter box in it. I didnt want to tear into a new crate engine to replace 24x wheel. It seems to be working fine. And as for the injetors it doe have the 430hp LS3 injectors, Im hoping those will be big enough. I think they will.

[Ls1c5vette]

Yeah I got the Lingenfelter box in it. I didnt want to tear into a new crate engine to replace 24x wheel. It seems to be working fine. And as for the injetors it doe have the 430hp LS3 injectors, Im hoping those will be big enough. I think they will.

Those will be plenty, I have them in my cammed ls3 swap and am at 81% IDC at wot , 6800 rpm

[RDF1]

I've also never seen a bad LPE 58 to 24 box.

I've used them many times and have had zero failures. I know of a couple off the top of my head that are in service now years later. One of them going on 10 years.

How can i be so unlucky?
Ive got a box full of X Links and those LPE converter boxes.
I treat them like holley Snipers now. If it has one i dont want to mess with it.

[edcmat-l1]

How can i be so unlucky?
Ive got a box full of X Links and those LPE converter boxes.
I treat them like holley Snipers now. If it has one i dont want to mess with it.

I'm a Holley dealer and have MANY Snipers in service. A buddy of mine who owns a shop across town recently had one he said went bad, but I've never seen one "bad".

Most failures seem to end up being install error.