Programmers

[chevyc5]

Member Since: Jul 2004
carnate

chevyc5ls1
I have just concluded the set up for my c5/99 LS1 6m :

BMC Carbon AirBox Intake-LS6 manifold intake -160°F Hypertech PowerStat Thermostat-BBK Shorty headers-S/S Remus exhaust+X pipe-LS6 camshaft kit( 204/218 dur@0,050 0,550-0,550 117,50 lobe separation) with new springs-Manley push rods 7,450-Double roller chain-Ti retainers-Z06 sway bars kit-Z06 shock absorbers-Stoptech brake kit-Pirelli Pzero Giallo Tyres.

I just drove only for few kilometers but it seems the car needs some tuning.
I'm aware about very good programs like HP Tuning and/or LS1 edit but, due to the fact I can play on mechanical side but on the electronic I'm not so skilled,
and here in Italy Vette is not yet so popular ,not too many experts to be supported in case of problem(the official GM dealers dont want to be involved in such matter), I would like to get some tools which cannot be too much difficult for a beginner, like I'm.
My choice was for the CraneMax Power Tuner but I have recently read Diablo Sport is also developing a new tool which can be even updated via email.
If anybody can give me any suggestions, I'm thanking in advance.
chevyc5ls1

 

[jcs712]

ChecyC5ls1:

It sounds like you definately need some programming changes to the ECM to compliment all the modifications you have done mechanically. In particular, the cam change may require you to remap your fuel air ratio and timing. You have mentioned a couple of aftermarket tuners. I would contact Diablo Sport and Hypertech directly and discuss your mods with one of their techs. They should be able to advise you on the best course of action. Maybe one of their stock programs will work for your setup or maybe they can customize a setup for you. Good Luck.

 

[Hib Halverson]

You're probably not going to be able to properly tune for your level of modifications using hand-held DIY devices such as the Hypertech Power Programmer Plus.

For best results with those mods you need to do several things
1) upgrade the heads, either with porting work to the LS1 heads, the addtion of stock LS6 heads or, better yet, the AFR head. The .550-lift LS6 cam, alone, with stock or near stock LS1 heads is not very effective because the heads can't flow enough air above .500-lift.

2) Note that with the cam and valve gear...you don't mention the type of valve spring. If you're using stock springs, be careful. Without the light weight valves that go with that cam, the valve train is unstable above 6200 rpm or so. Another problem is that the late LS6 cam has a smaller base circle than both the LS1 or early-LS6 cams. The late-LS6 valves had longer stems to compensate and bring valve train geometry back into the proper range. If you're using LS1/early-LS6 valve train with the late-LS6 camshaft, stock valve springs and not using the lighter valves, you will have a reliability problem with the valve train not being stable above 6000. As the late LS6 cam and has all its extra performance above 5700 rpm, the combination you have negates most of the advantage of the cam change. Compared to an LS1, you'll loose torque down low and not gain power up top.

3) have a calibration expert such as Z-Industries reprogram your ECM. Ron Zimmer has done all the calibration work on my modified vehicles, both personal and magazine projects. Z-Industries is at 909-303-6857 or remmizr@aol.com

 

[chevyc5]

Thanks Hib,
I got a complete kit sold by SDPC 2000 ,new valve, pushrod 7,450 and double roller chain included.I'm thinking to get a tune for reprograming my ECM.
regards
paolo