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After header dyno

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Old Apr 9, 2008 | 06:49 PM
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Default After header dyno

This is my before and after Dyno after LG pros w/ cats and tune,Im not very impressed yet.But it does sound very very good at wot.


Last edited by Wickd1; Apr 9, 2008 at 07:03 PM.
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Old Apr 9, 2008 | 07:34 PM
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Originally Posted by White-C5
This is my before and after Dyno after LG pros w/ cats and tune,Im not very impressed yet.But it does sound very very good at wot.

Looks good to me. Check out how much and how long you held the HP and torque up compared to stock at thier peaks.
Your new hp is equal to your old from 4800-6200 not just at 5600-6000.
The torque increased a lot in a simular fashon.
Your set for a cam swap now.
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Old Apr 9, 2008 | 08:30 PM
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I think with a Tune, it will put more of a smile on your face.

Here is 99 Stock/Motor and Stock Tune vs Custom Predator Tune, the AFR is around 13 w/ the Predator tune.



Same car (differnt shop dyno) added AR Long tubes/Ported TB and LS6 intake and my (self tuned) custom EFI Live tune.



For progression sake, here is the above then a H/C package added
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Old Apr 9, 2008 | 10:34 PM
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Do you feel a difference?
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Old Apr 9, 2008 | 10:48 PM
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Its been raining here for 5 days, So its really hard to get on the car hard, But from what i can tell, When i rap on it , the front end seems to lift alot higher than ever before.I guess like most of us , im chasing a dyno # but when i look that i spent $2000 total and got 7 hp and 14 trq then that seems messed up to me, Then before and after install LG says 30/40 to wheels is no problem,Well, makes me wonder....But i love the sound, the look , and you can see in my graph theres defently a gain, then im sure on dry pavement the car is gonna pull really hard from 3000 rpm to 5500 rpm ,
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Old Apr 9, 2008 | 11:35 PM
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I can't imagine how frustrating that is. I just ordered some LTH Kooks 1-7/8". I better make more than 7hp. What size are those LG Headers?
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Old Apr 10, 2008 | 03:23 AM
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Originally Posted by JKennedy1612
I can't imagine how frustrating that is. I just ordered some LTH Kooks 1-7/8". I better make more than 7hp. What size are those LG Headers?
I gained 60 rwhp off of cam only and thats under 2k with a tune. go with ls6 heads/intake/cam and the car will open up.. then it just becomes a money pit
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Old Apr 11, 2008 | 05:52 PM
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They are 1-7/8 and i already have an LS6 intake,After driving the car for a few days now, it pulls real hard all the way thru the power band,And It leaps real nice when it shifts from 1st to 2nd..
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Old Apr 11, 2008 | 06:28 PM
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Originally Posted by Mitch.Shea
I gained 60 rwhp off of cam only and thats under 2k with a tune. go with ls6 heads/intake/cam and the car will open up.. then it just becomes a money pit
I have an LS6
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Old Apr 11, 2008 | 06:28 PM
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Originally Posted by White-C5
They are 1-7/8 and i already have an LS6 intake,After driving the car for a few days now, it pulls real hard all the way thru the power band,And It leaps real nice when it shifts from 1st to 2nd..
That's reassuring. Good to hear!
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Old Apr 11, 2008 | 06:49 PM
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Originally Posted by White-C5
They are 1-7/8 and i already have an LS6 intake,After driving the car for a few days now, it pulls real hard all the way thru the power band,And It leaps real nice when it shifts from 1st to 2nd..
So are you happy?? A lot of people do get tied up in dyno numbers and most just look at the peak number. If you look at the area under the curve there is good gain through the whole RPM band

And headers are pretty much a necessary mod anyways if you plan on doing anything else, have fun!

Last edited by vetterlatethannever; Apr 11, 2008 at 06:52 PM.
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Old May 7, 2008 | 10:04 AM
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For what it's worth...I had the LG streets (Not the Pros) with cats installed, kept the stock exhaust (for now) Black wing and a Dyno tune the numbers are as follows; 337.2 hp 356.62 tq.
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Old May 7, 2008 | 11:54 AM
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With my A4 after my FLP Longtubes, 3200 Stall and Tune, I made 323 hp, other than that it was stock.

7 hp? , something is wrong.

Last edited by 1998whitecoupe-a4; May 7, 2008 at 11:57 AM.
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Old May 7, 2008 | 12:03 PM
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There can just be too many factors concerning a dyno as to why it gave you the number it did. The important thing is if you are satisfied with the SOTP feel and the sound. If so, money well spent.
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Old May 7, 2008 | 02:02 PM
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LG,LTs, x pipe& hi flo cats or (no cats w/ by pass pipes) That is the comlete setup. For extra kick put in a 3" catback system, to make a complete 3" system. This all adds up to much more torque and horse power. I've had this system on for about 5 yrs., and I love it. Happy modding!
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