Anyone use, know someone who uses these meters. I am wanting to do some baseline testing of things I do to car and think this would be a close way to check hp and other gains. Input good/bad and other ideas if any.

WillWren has one and has many posts regarding it'* use and usefulness.

What are the major reasons you have for wanting one or your plans for using one.

I have a home made intake that I feel gained me a lot of hp and I want to know other then by seat of pants. Also another toy to use as a reason to do some stuff I am just in the early part of modding car, I can undo almost everything. Or go back stock I should say to get some base numbers and see what gains hp and what hurts. Only thing I can not undo this far is tune up, but stock air box and drilled Tstat I can undo. I just wanted to make sure was not a "waste of money". Mod as I like to use money to make hp, and soon measure it/

Listen to Bill and Will...I didn't, I bought one, I sold it for a loss shortly thereafter.

Gtech == fun toy, but little more. Spend your money on a good scantool instead.

For hp and tq peak values, they're worthless garbage. I've owned 3 different models including the new RR.

For identifying shift points vs. hp or tq peak, they're fairly useful.

They are also worthless for characterizing before/after of mods. They are horribly inaccurate in thier hp/tq calculations.

To clarify:

Horsepower or Torque PEAK VALUES are very inaccurate.
The rpm that your peak hp or tq is delivered is accurate, but not very useful to most.

1/4 mile times are all over the map even after doing hot/cold laboratory calibrations. Don't waste your money. Spend it on a scantool or mods instead.

So what kinda scan tool should one look into. We have every name brand tool people come by the dealership I work at, I am a big fan of eBay, but scan tool from them.... . Makes me wonder when in works for a month or less,
So who has the best tool....

Ebay.

Actron CP9110 with the GM cartridge and rectangular 12-pin ALDL connector. Whole package should cost you about 100 bones.

well i like my aeroforce scan gauge and you get more than 30 feature to scan its expensive but fun to have. oupss forgot you have a series 1

:briding: so now is is SI against SII, lol yes I am the "ODD DUCK" as someone recently posted..