SDB

iTrader: (7)

I did the cylinder balance test, and have the results, but don't know what the hell it means! Any input?

Cylinder: IAC number
1 722
2 886
3 918
4 768
5 866
6 898
7 710
8 854

Here is description of car...
2000 Camaro Z-28
Monterrey Maroon with Saddle leather
All options except T-tops and traction control
MTI 382 stroker motor with Lunati rotating assembly
Mobil 1 synthetic 10W-30 engine oil
30 lb. SVO fuel injectors
Metco Valve cover breather
NGK TR-6 spark plugs gapped at .038
Taylor Thundervolt spark plug wires
Walboro intank GS340M fuel pump
Hotwire kit for fuel pump
Kenne Bell Boost-A-Pump
Timing Tuner
ASP underdrive pulley
Stage 2 LS1 heads with complete valaetrain upgrade
LS6 intake manifold
Ported Throttlebody
Descreened MAF
MTI carbon fiber lid with K&N
FLP long tube headers, “off road” pipes, Y pipe
Flowtech dump tube with QTEC electric cut out
Stock SS rear exhaust
SLP fan control switch
Rossler 4L60E transmission with deep GM Truck style pan
Royal Purple synthetic ATF for transmission
Torque Management Delete
Yank Pro Thruster 4000 stall torque converter
10 bolt rear with 3.42 gears, Summit preload support cover, stud kit, synthetic fluid
Edelbrock Torque Arm w/ poly mount
Hotchkis front hollow sway bar
Hotchkis rear hollow sway bar
Hotchkis welded in sub frame connectors
BMR lower control arm rubber/poly
BMR adjustable panhard rod bar
HAL QAI-R front shocks and springs
HAL QA1 rear shocks with DMS lowering springs
Baer Eradispeed cross drilled /slotted rotors- front
SureStop rear rotors, cross drilled/slotted- rear
Earls Hyperfirm Stainless Steel brake lines
Ford HD brake fluid
Hurst line lock kit with pre-bent lines
Hawk pads
Boyd Blaster wheels, 17 X 9.5 front 17 X 11 rear
Sumitimo 275-40-17 front, BFG Drag Radials 315-35-17 rear
Stull Billet Grill
Window Tint
Secondary alarm system
Optima “Red Top” group 75 battery
VIN acid etched in all glass
Dyno Tuning at Livernois Motorsports/Detroit Speedworks (Greg Banish)
NX GM MAF nitrous kit, remote bottle opener, thermostatically controlled automatic bottle heater,
purge kit, nitrous pressure gauge, TPAS switch, three-button rocker panel control, blow down tube
(Full GEN-X-2 kit). Small FP gauge mounted on fuel rail. Custom billet aluminum bottle brackets
from Aerospace Engineering.
______________________________________________

What do the results mean in my situation? Just got the EFILive working and was messing around with it today with car just idling in the garage. Thanks,

SDB

gojo

iTrader: (12)

The test is supposed to measure the relative power output of each cylinder.
#1 cylinder is hard to get right because the test usualy starts at #1. It could mean there are bad plugs, wires, carbon buildup, bent P rods, etc. Or, it could be the result of a loppy cam. Your numbers are too far apart. I would run the test a few times and watch for consistancy and be sure you maintain a stable idle. If your car is idling poorly this would confirm some problem.

SDB

iTrader: (7)

thanks for the input, I will run the check again a couple of times. Plugs are very recent, wires are about a year/2,000 miles old, cam is fairly lopy (MTI X1 cam, .591/.571 lift with 230/227 duration). Shouldn't be to much carbon build up in this thing! Hopefully not a bent pushrod, have hardened MTI 7.4 pushrods and don't over rev it. WIll try it again and see what results are.

SDB

HumpinSS

iTrader: (1)

THe cam may be the answer to your question. At idle part of the reason the car lopes is because of inconsistent filling of the cylinders

Brains

iTrader: (7)

Exactly - running a balance test on a cammed car will not return useful results, unless you could run it at a higher RPM

gojo

iTrader: (12)

I don't think you can say it's not useful for all cams. I would guess a really big cam might be a problem. I run the test 3-4 times consecutively and it always has values within a max of 10-15 on each cylinder. With some of the differences in his numbers I would look into it. On one test I ran, cylinder 3 was inconsistent. It turned out the end of the plug had come unscrewed. I haven't done it in a while, but with EFI I think I remember that there is an RPM limit for the test to run.

Another_User

It worked fine on my car, and I have a Hotcam.