So I recently purchased the new gtech pro SS performance meter because I heard a lot of good about and for 200 bucks well worth it for timing things. Well my z is vortech supercharged, true dual exhaust and has test pipes. The meter is only reading between 230-245hp and 195-230 tq. Lol I mean I expect it to not be perfect but WOW THATS WAY OFF. I put the weight of the car in And did a smooth pull in 2 nd gear like 5 times. Maybe I'm doing something wrong. Anyone ever had This problem?

 

Pulled 328 hp but still low

 

where did you weigh your car?

 

No where I looked up the weight and added my weight. But I got a few things that took weight off the car, rims, spare, cats ect. It still shouldn't be that off

 

well, the Dyno dont have wind resistance and the load resistance can varie on the street so you cant compare a Dyno # to your Gtech. having said that, my Gtech 1/4 ET and Trap were pretty close to my track time.