Javi
TYF Newbie
- Joined
- Oct 5, 2009
- Posts
- 24
- Reaction score
- 2
I recently bought a new 2008 (zero miles) Yukon Denali. Been the gear head that I am, started to do some research about the 6.2 engine, and the performance gains in terms of WHP I could achieve with different mods available for my truck. To my surprise, not many people have done before and after dyno sessions or nor have shared the information in public forums (only the alleged numbers of the vendors). I’ve tried many times the search option with no luck, emailed some vendors about actual numbers, dyno sheets, with no answers... therefore, I decided to do my own, and share it with the community. I’ll try tomorrow to do a base line dyno in a local AWD dyno jet for now. Later, hopefully this week, I will test the gains of the Vararam Tri Power Ram Air Intake and then (same day), custom EFILive tuning (don’t work for them, nor sell their products). Performance gains should be fairly accurate, ever since it’s not about how high the numbers are (which depends of the dyno), it’s about how much an intake and programming can give before and after in terms of whp.
I would like to make clear that when I drove for the first time my truck, I noticed that although GM claimed that peak HP was achieved at 5600 rpm’s the tranny shifted at 5500rpm’s, so the first thing I asked my tuner to change was the shift points in the tranny, to 5800rpm’s, set the rev limiter to 6200rpm’s, and delete the top speed limiter. No other modifications have been done. Keep in mind this when looking at the dyno sheet, because it will be revving higher than stock. I have to say though… by simply doing that, the truck came alive! WHAT A DIFFERENCE!!
I will be getting back to you guys (and gals) tomorrow hopefully with a baseline. Hope this is just the beginning of many more, from me and other members that wan't to do the same.
Thanks!
I would like to make clear that when I drove for the first time my truck, I noticed that although GM claimed that peak HP was achieved at 5600 rpm’s the tranny shifted at 5500rpm’s, so the first thing I asked my tuner to change was the shift points in the tranny, to 5800rpm’s, set the rev limiter to 6200rpm’s, and delete the top speed limiter. No other modifications have been done. Keep in mind this when looking at the dyno sheet, because it will be revving higher than stock. I have to say though… by simply doing that, the truck came alive! WHAT A DIFFERENCE!!
I will be getting back to you guys (and gals) tomorrow hopefully with a baseline. Hope this is just the beginning of many more, from me and other members that wan't to do the same.
Thanks!
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