LT's and Prochamber

1QWK96GT

Member

Nov 28, 2004

44

0

7

Mar 14, 2006

#1

• Mar 14, 2006

• #1

Well I have finally got my exhaust installed. Its Mac lt's, prochamber, with a flowmaster catback. It sounds badass, but I feel like I lost power. Going from a dead stop if I get on it the car acts like it has lost power until it hits 3k rpm's then it SCREAMS. Before the LT's and prochamber I had stock exhaust manifolds, upr x-pipe, and flowmaster catback . With my old setup it was not as sluggish from idle to 3k. After the install it did throw a rear 02 sensor code, which I have not taken care of yet. Right now I have stock gears and I feel that may have SOME to do with it. Anyone else with a similar experience? Could something be wrong? Thanks

 

stangman

15 Year Member

Jul 10, 2003

2,690

10

69

in a 3 bed, 2 bath

Mar 14, 2006

#2

• Mar 14, 2006

• #2

that's normal. your power band has chnged with those mods, so that's why it feels different. it's all good

 

Mossberg

Active Member

Jul 21, 2003

0

1

36

ATL, Shawty

Mar 14, 2006

#3

• Mar 14, 2006

• #3

I thought long tubes gave you more low end torque.

 

1QWK96GT

Member

Nov 28, 2004

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0

7

Mar 14, 2006

#4

• Mar 14, 2006

• #4

Did this happen to you as well? It kind of sucks I want my bottom end back.

 

1QWK96GT

Member

Nov 28, 2004

44

0

7

Mar 14, 2006

#5

• Mar 14, 2006

• #5

I just found this and it confuses me because everything they are saying seems to be the exact opposite of how my car is performing with them? http://forums.modulardepot.com/showthread.php?threadid=18807&highlight=long+tube+results

 

csledd

Official Ovary Punching Member

Founding Member

Aug 18, 2001

1,115

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Paducah, KY

Mar 14, 2006

#6

• Mar 14, 2006

• #6

It is completely normal to lose down low power when doing LT's.. the reason why is because there is less restriction now. The less restriction will help you out up top though. A dyno tune MAY fix some of your problem.. it did mine at least but I was running almost 20% lean.. here's my dyno graph anyways

 

S

stng

New Member

Jul 27, 2005

182

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Mar 14, 2006

#7

• Mar 14, 2006

• #7

I lost some low end torque as well, but it really made a big differnce up top. If you want some of your low end torque back get some hi-flo cats to help with some back pressure or get yourself some gears to compensate for the lost of low end torque...

 

jasonh_86

I

May 20, 2005

1,156

2

48

Arkansas

Mar 14, 2006

#8

• Mar 14, 2006

• #8

How was the quality of the mac headers?.. i'm really considering those due to the price.. I love my prochamber and flowmaster combo, I really wanna stick with that setup but with LT's..

Got any sound clips?

 

1QWK96GT

Member

Nov 28, 2004

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7

Mar 14, 2006

#9

• Mar 14, 2006

• #9

Well that makes me feel a little better, since its not just my car. I have already been out running the car hard, should I go to a dyno and get my a/f ratio checked before I do anymore driving? I already have 4.10's, I just have not gotten around to installing them. I will wait to see how that turns out. The quality of the mac lt's are fine, and the price is definitely right. I do not have any sound clips yet, but I will get some soon. It sounds bad ass. Is that dyno before and after lt's? If so thats some good gains.

 

jasonh_86

I

May 20, 2005

1,156

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Arkansas

Mar 14, 2006

#10

• Mar 14, 2006

• #10

I've been contemplating the Mac longtubes, but have heard too many bad things and it kinda scared me away.. were your's ceramic or HTS coated?

Not sure, but I think that dyno graph was before and after tune, with LT's on in the baseline run.. I could be wrong tho

 

1QWK96GT

Member

Nov 28, 2004

44

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7

Mar 14, 2006

#11

• Mar 14, 2006

• #11

Mine are the HTS coated ones. I really dont care what they look like, so I got those. I have a buddy who has had the HTS coated ones for 2 years and his only have some surface rust. Which doesnt affect their function.

 

csledd

Official Ovary Punching Member

Founding Member

Aug 18, 2001

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Paducah, KY

Mar 14, 2006

#12

• Mar 14, 2006

• #12

yeah that dyno was before and after the tune.. I had SLP LTs, SLP O/R Xpipe, Steeda Catback, Steeda CAI, and Accufab 75mm TB and Plenum