Is it worth a swap from Macs to long tubes?
I currently have Macs and the ORY on my car, and they seem to work fine. I didn't modify them in anyway, but I know the sound of LT's will be much better. I figure with LT's and a cut out I would see 10-15 hp max. So.. yeah I'm going to sell the Macs for some Pacesetters. They just better not ****** leak like my Dynatechs did!!!!!!!!!
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From: Tree-Hugging, Bug eating CALI'
I had the MACs and liked them. With the stock 'verter, and a Diablosport tune, it put down 334 RWHP and about 350 RWTQ. With my SS3800 'verter locked, and a FFP dyno tune, it put down 354 RWHP and 360RWTQ. Both were through Magnaflow cats'. On the track, and on crappy street tires, I can run pretty consistant high 12s, wereas with the MACs, I got into the 12s a few times, on the same night. Not really a GOOD direct comparison, but, maybe give you an idea.
I would say, if you didn' t have ANY headers, go with LTs. Since it seems like you are "stepping up" from MACs, the additional money may not be worth it. I know I like the look of the T304 SS better than the coatings.
I would say, if you didn' t have ANY headers, go with LTs. Since it seems like you are "stepping up" from MACs, the additional money may not be worth it. I know I like the look of the T304 SS better than the coatings.
I am going to stay with the Macs and just make them slip fit and have Allan Futral build me a custom y pipe. He builds a fine y pipe and I think this will give me the gain I am looking for.
The ceramic coating that came on the macs I got from speed inc 4 years ago still looks very good. I am not sure if they used Jet hot coatings or who else but they did a great job. As for sound, with the Edelbrock cat back on the car this car sounds bad ***. Very little rasp but deep rumble, it just does not flow to great so That is what I have a cutout for.
The ceramic coating that came on the macs I got from speed inc 4 years ago still looks very good. I am not sure if they used Jet hot coatings or who else but they did a great job. As for sound, with the Edelbrock cat back on the car this car sounds bad ***. Very little rasp but deep rumble, it just does not flow to great so That is what I have a cutout for.
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From: Chandler, Arizona
Originally Posted by JRracing
I went from macs to a set of flp long tubes both with ORY. And changed the flowmaster to a gmmg with a E-cutout in the I pipe.
The dyno power went from 365 to 390 with the cut out open.
And if I remember correctly, I went 12.6x to around 12.19. But that was also going from a 10 bolt to a 9".
You could mod those macs and maybe get 10 more HP. Port the openings of the primaries, grind down the welds for better fow.
And I hear of people cutting the ball flang off and weld a 3 bolt flat flang to them.
And maybe get a bigger Y made for it.
When I put the flp's on, I ported the openings of the primaries. You can actually look in there and see the welds. Not any more. There smooth inside now.
The dyno power went from 365 to 390 with the cut out open.
And if I remember correctly, I went 12.6x to around 12.19. But that was also going from a 10 bolt to a 9".
You could mod those macs and maybe get 10 more HP. Port the openings of the primaries, grind down the welds for better fow.
And I hear of people cutting the ball flang off and weld a 3 bolt flat flang to them.
And maybe get a bigger Y made for it.
When I put the flp's on, I ported the openings of the primaries. You can actually look in there and see the welds. Not any more. There smooth inside now.
I also have Macs on my son's 94 Z28 and I think they are great. I did have to clean out the welds in all the ports and in the collector, but they really woke up that LT1.
