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Old 06-04-2010, 02:37 AM   #1
Luvpilot's Avatar
Drives: GM
Join Date: Jun 2009
Location: AZ
Posts: 352
Maggie experts...5 lbs boost on a 3.6 pulley?

I finished installing the maggie a few days ago. Got Ted to do the tune and put it on a local dyno. Ted put alot of time in on the tune for me

I'm only @ 5lbs boost with the 3.6 pulley.
I know the heat in AZ is knocking it down some. DA was 4000ft today. But 5 lbs @ 90 degrees OAT? Hell it's not even close to warm here yet. I'll be creating vacuum when temps get to 118 with a DA of 5500

Car has 1 7\8 LT's w\cats, 2.5 cat back, ADM race intake and an MSD fuel booster. Added a set of NGK plugs.

Tensioner pulleys are almost touching using the belt from maggie so I don't believe its belt slip

On a Dynojet..
It ran 483/505 on the first tune but we had to pull timing, 87 degrees OAT
It ran 478/477 on the second tune with a Perfect AFR of 11.4, 91 degrees OAT
I was 402/393 before the maggie, on the same dyno, 86 degrees OAT

Anyone else need a 3.4 just to get 7 lbs @ 4000 DA?
Could I have missed\screwed up something on the install?
Do I just need to go get laid and forget about it???

Help me out guys because if installing the blower, dropping the pulley size, installing a fuel booster and getting a tune netted me a whopping
76 hp\84 tq I may have to start drinking. Very Heavily
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Old 06-04-2010, 04:04 AM   #2

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Drives: 2013 A6 GT 5.0
Join Date: Nov 2009
Location: Edmond, OK
Posts: 2,909
I think most people lose about 1lb of boost from the headers and exhaust. What does the 3.6 suppose to make.
BLK/BLK 1SS/RS Ordered 11-01-2009 Took delivery 12-22-2009. Heads/cam/converter/bolt ons. SOLD Feb 2015 to fund 6th gen LT1 SS with 8L90E.
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Old 06-04-2010, 08:16 AM   #3
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Drives: 2012 GT500
Join Date: Sep 2008
Location: McKinney Texas
Posts: 3,569
It's hard to tell and compare mods to mods, but with similar mods, and the 3.8 pulley, I was putting down 6 to 6.5 lbs of boost. I am not at 4000 ft though so I'm sorry I can't help with how much of a difference that would make. Did the shop that dyno'd it have any ideas? Also, can a dyno "correct" for elevation as well to simualte what you would get at a lower elevation?

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