What size did his kit come with and much boost did it produce

 

3.625" pulley? Sounds like something a Procharger would use lol.

 

Not a whole lot of thought with this one to tell you the truth. I know that there are advantages and disadvantages of the twin screw design. I only based it on size really. On a 6.2L motor, a 2.3L unit should obviously have more power potential than a 1.9L unit. I was comparing the Whipple with the 1900 because the kits both run pretty close in price.

 

The kits come with the 3.625" pulley as standard. On 5.3L, I have heard that it will make 8-10psi but on my (and others)6.2L, it didn't even get to 6psi. My initial runs with the aweful Whipple tune and 3.625" pulley were high 13's@99. Not terribly impressive. I got a wideband o2 and boost guage, learned I was only making about 5.5psi and ordered the 3.375" pulley. With the new pulley I was hitting 9si. I did some tinkering to my tune and got a best of 13.12@105.31 now my boost is at 8si with LT's. I'm currently working on my tune and trying some things. I hope I can get solid 12.7's to 12.8's with my current setup. Keep
In mind that this is a fully loaded Denali AWD.

 

I plan on running the kit and just a borla cat back for now and I plan on using the whipple tune for now I plan on getting header in the future and a custom tune maybe a pulley change when I do the header I just want to how it does in this form