Results of Mac verses Pace Setter Headers
03-07-2004, 02:48 PM
#1
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Results of Mac verses Pace Setter Headers With Macs: DA = -717 (55 degrees, 29% hum, 30.42 baro)
Pace Setter Long Tubes = +778 (72 degrees, 29% hum, 30.12 baro)
Macs 1/8 mile et = 7.072 @ 95.82 mph and a 7.103 @ 95.23 mph
Pace Setter = 1/8 mile et = 7.17 @ 94.60 mph
I did have two slightly better runs but was ET racing and had to shut down to avoid breaking out. Probably a 95.0 mph possible on the other two runs.
Althought quite a difference in Density Altitute, don't believe I gained much if any. I think maybe there could be some good gains if I had a better flowing cam.
No scale available but I did have more fuel so the car was slightly heavier last night.
Pace Setter Long Tubes = +778 (72 degrees, 29% hum, 30.12 baro)
Macs 1/8 mile et = 7.072 @ 95.82 mph and a 7.103 @ 95.23 mph
Pace Setter = 1/8 mile et = 7.17 @ 94.60 mph
I did have two slightly better runs but was ET racing and had to shut down to avoid breaking out. Probably a 95.0 mph possible on the other two runs.
Althought quite a difference in Density Altitute, don't believe I gained much if any. I think maybe there could be some good gains if I had a better flowing cam.
No scale available but I did have more fuel so the car was slightly heavier last night.
Last edited by Larry; 03-07-2004 at 09:32 PM.
03-07-2004, 04:27 PM
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Wont really gain anything on the topend over macs, but you'll gain a lot of lowend power for the street. I have a graph from my car somewhere....peak rwhp gains from macs to FLP, 0rwhp. rwtq gains at one point, 40rwtq or so (like 2500rpms or so).
03-07-2004, 11:00 PM
#5
Originally Posted by Redlinez
That temp diff from 55 to 72 makes a fairly large difference too.
The Pacesetters are giving at least some benefit over the Macs based on all of that IMO.
03-08-2004, 05:05 AM
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If this site is accurate I gain .2 mph and zero et.
http://www.stangbangerz.com/modules....h&file=density
http://www.stangbangerz.com/modules....h&file=density
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03-08-2004, 11:46 AM
#8
I switched from MACs ory to FLPs (mostly for the ability to swap cats), car runs/dynos exactly the same. The FLP y-pipe is pretty crappy but no worse the the MACs I guess. I bet these headers/off road pipes/y-pipe and clamps weigh 25 lbs more then the MACs - these are some heavy headers and all those clamps (4 'v' clamps and 3 band clamps) add up. Not sorry I made the switch though, these fit up under the car nice and look a lot better then my old MACs and I can swap the cats out in 10 minutes which is a big plus for me..