MAC mid lengths and MAC ORY?

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Mar 6, 2007 | 12:04 AM

#21

Blk97WS6

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From: Northern, VA

I definetly noticed a difference when i first put the mids on. At that time, my only other mods were borla CB and a lid.

Mar 6, 2007 | 07:57 AM

#22

marv

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From: Scottsboro, AL

Quote:

Originally Posted by Bird-Of-Prey

With all do respect, these are absolutly false statements. Macs do have horrible catted Y-pipes compared to their ORY. The difference in the MACs vs LTs is under the curve. You will gain some lower end torque with the LTs, however the difference in top end is hardly even measurable. I suggest you do a search as it has been covered more times than anything else on this forum.

Glad to see someone else thinking the same thing I did...

I didn't think I was losing my mind...

Mar 6, 2007 | 09:26 AM

#23

Hennytime

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From: winter springs, fl

Quote:

Originally Posted by Cop Car

its been dyno proven that mac mids dont net gain you any hp. the hp gains seen when people switch to mac mids is the replacing of cats. dont take my word for it, do a search.

wow, now im going to have to spend the 75 bucks just to prove you wrong on this one.

Mar 6, 2007 | 12:01 PM

#24

Cop Car

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From: Indy

Quote:

Originally Posted by Hennytime

wow, now im going to have to spend the 75 bucks just to prove you wrong on this one.

use 00-02 manifolds and the same cats, or no cats. same y pipe, same catback, change only the stock manifolds for macs. dont cry when you get the results

Mar 6, 2007 | 12:05 PM

#25

lsx24

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From: NC

Lol @ Cop Car

Mar 6, 2007 | 12:08 PM

#26

Hennytime

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From: winter springs, fl

Quote:

Originally Posted by Cop Car

use 00-02 manifolds and the same cats, or no cats. same y pipe, same catback, change only the stock manifolds for macs. dont cry when you get the results

yes, and you put in a 23x/23x cam into a car with 00-02 manifolds, and an ory see what you can get from it, and then put the macs on and see what it does. they flow more. while the stockers are good pieces, its till a log style manifold which will always come into second place when each port has its own runner

Mar 6, 2007 | 05:09 PM

#27

00Z-28Maro

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From: Washington, DC.

Quote:

Originally Posted by Cop Car

use 00-02 manifolds and the same cats, or no cats. same y pipe, same catback, change only the stock manifolds for macs. dont cry when you get the results

Then what are shortys a downgrade? Have you ever seen a set of MACs? Your lstatement makes no sense at all. I even told you what i made on the dyno going from MACs to LTs going by your logic a car makes no gain going from stock manifolds to LTs, either way you are full of crap and shouldn't be giving advice on headers. Maybe its you that needs to try a search.

Mar 6, 2007 | 06:51 PM

#28

Assman

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From: Roy, Utah

Quote:

I even told you what i made on the dyno going from MACs to LTs

That didn't go well with his "theory" so he decided to ignore it.

Macs do net a gain, I love the added SOTP feel.

As said before, shorty's must be a bigger restriction than stock.?.

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Mar 6, 2007 | 07:39 PM

#29

Bird-Of-Prey

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From: Lebanon, OH

Quote:

Originally Posted by Cop Car

use 00-02 manifolds and the same cats, or no cats. same y pipe, same catback, change only the stock manifolds for macs. dont cry when you get the results

You are definately confusing the MAC's and shorty headers. The MAC's are basically a 3/4 mid-length header and are much closer to LT's than stock manifolds. You can't run the same cats or ORY pipe as it won't fit. MAC's are very free flowing thus loosing little to no top end power. The difference with LT's is that they have longer tubes and are tuned in length to help scavenge better which will give you a little more power under the curve (mid-range). Here's a post with a good pic of the MAC's. Not even close to shorty headers.

https://ls1tech.com/forums/showthrea...light=macs+lts

However I do agree that if going from 00-02 manifolds to shorty headers there would minimal if any gain.

Mar 6, 2007 | 08:11 PM

#30

DrkPhx

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From: St. Michael, MN.

I ran the MAC's for a couple of years and loved them. Easy to install and great ground clearance. A downside is the weld bead on the inside of the primary edge. So I ported the inside primaries to the correct measured inside diameter. I also had a Flowmaster collector welded in to remove the rasp.

Mar 6, 2007 | 08:56 PM

#31

Assman

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From: Roy, Utah

Quote:

Easy to install and great ground clearance. A downside is the weld bead on the inside of the primary edge. So I ported the inside primaries to the correct measured inside diameter

I did the same thing to mine, cleaned up very nicely.

Mar 7, 2007 | 01:46 PM

#32

Cop Car

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From: Indy

do whatever you guys want. "longtubes or no tubes"

Mar 7, 2007 | 01:49 PM

#33

NHRAMAN

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From: Vancouver,[KITSILANO].B.C. Canada *WestCoast*

if u are going to run SPORTLINES..I bet mids are your best bet for clearance.

Mar 7, 2007 | 02:41 PM

#34

MARKSZ71

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From: bama bitch

i loved my macs no problems here

Mar 7, 2007 | 08:41 PM

#35

marv

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From: Scottsboro, AL

Quote:

Originally Posted by Cop Car

do whatever you guys want. "longtubes or no tubes"

We do what we do because it works and it's proven...

Pacesetter headers and ORY are good products and make good power...however, their not the greatest header ever made. There are other alternatives out there that sometimes fit peoples budgets/plans better than LTs would.

Some folks just don't see that though I suppose...

Mar 7, 2007 | 11:17 PM

#36

Spade

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From: Senoia, GA

I gained 15rwhp and 16rwtq switching from Stock headers and ory to MAC/ORY. I still have them with my Procharger making 500rwhp/490rwtq on a mustang dyno. So I would say they work well enough.

Mar 7, 2007 | 11:48 PM

#37

mvvette97

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From: Leon Iowa

I like my Mac mids. I didn't have any cats before I put the Macs on . I did notice a big differance after I put them on and it was so easy I could of done it with my eyes closed. Almost. They are a big improvement over the stock manifolds.