I can light my tires up from a 20 roll with stock manifolds.

 

i have long tubes and true 3 inch duals with stock maggie tune and 3.0 pulley and truck pulls insane. You will lose about 1/2-3/4 pounds of boost but make more hp at a lower psi. then just get a smaller pulley to bring it back up

 

you need to get back with Allen, he's good at what he does something is wrong

 

When I had my charger on my VHO it was insane I could not stop from breaking em loose thru 1-2. I would say get back with Allen as he should be able to fix you up and figure out what is wrong. You shouldnt feel like the tahoe is that close to you with what you have done.

 

I got 10rwhp and 32 rwtq when i did the lt's and true dual 3" on the stock maggie pully and tune. After Nelson tune and 3.0 pully It went up some where between 65 to 75 rwhp cant find my dyno sheets right now. I lost a full lb of boost when I did the lts and exhaust, but made more power. Like said above you should be able to roast them. I know mine with the 80e conversion will spin as long as im willing to hold the pedal or a damn curb stops me and breaks the axle

 

Did you get this solved? I can roll them over pretty good for as heavy as I am and as little as I have done (intake, catback and tune w/ 3.73s). I would think you could blaze them aff the rims! This is a poor example, but you get the idea.
Skreeeetch

 

No its still not right.