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How bad do Cats kill mpgs?

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Old 09-24-03, 07:19 PM
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Question How bad do Cats kill mpgs?

So, from those of you who have experienced this first hand. How bad do catalytic converters kill gas mileage?
Thanks
Old 09-24-03, 07:25 PM
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From my experience with different makes, I didn't see any increase providing cat(s) were functioning properly.
Old 09-24-03, 07:49 PM
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without my cats i had a slight increase in mpg. after all my mods my mpg has only gone up. where as stock i got like 180 mpg i now get 250~300
Old 09-24-03, 08:56 PM
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ajsuper7,
does that electric turbo really work????
Old 09-24-03, 09:38 PM
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If anything It promotes It. Not only did I notice a tad bit of Increase of Fuel Economy when I removed my Cat, I noticed a considerable loss of low end! Keep It on If you have a Hi-Flow setup.
Old 09-24-03, 10:12 PM
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the electric turbo does work from my butt dyno, i have yet to do any runs with it on/off on a dyno or with my gtech. it definitly seems to help low end over just a cone filter but until ive proven it works at wot i dont want to say its a good buy. for me im happy with it...so i spent 120 bucks...no biggie. if you got the money to spend might as well try i say.
Old 09-25-03, 03:48 AM
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what'd you guys recommend. I've heard good things about TurboFlow from bonez.
Old 09-25-03, 05:39 AM
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electric turbo
Old 09-25-03, 10:41 AM
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Originally posted by ajsuper7
the electric turbo does work from my butt dyno, i have yet to do any runs with it on/off on a dyno or with my gtech. it definitly seems to help low end over just a cone filter but until ive proven it works at wot i dont want to say its a good buy. for me im happy with it...so i spent 120 bucks...no biggie. if you got the money to spend might as well try i say.

Oh god, lock this thread now before it gets way out of hand..
Old 09-25-03, 01:13 PM
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haha, that's kinda funny. I was thinking or building my own "electric turbo" for an old corolla i had.
Old 09-25-03, 01:38 PM
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I just installed a downpiper and bonez high flow main cat with the stock cat back. Before it was a full 2.5-3 inch exhaust. I will let you know if my mpg goes up or down and how much.
Old 09-25-03, 01:45 PM
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That'd be awesome, thanks
Old 09-25-03, 01:53 PM
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with a turbo it will help gas mileage. Yes without you are running free but you are using more boost so thats where it hits your gas mileage. Dropping the cats from a NA will help at the pumps.
Old 09-25-03, 05:01 PM
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any body have used cats for a 88 NA that are in usable shape?
Old 09-25-03, 05:07 PM
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Also, no cats on an NA promotes gas saving driving while in the city, as anythign over like 2500 rpm draws unwanted attention.
Old 09-25-03, 05:16 PM
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Also, no cats on an NA promotes gas saving driving while in the city, as anythign over like 2500 rpm draws unwanted attention.
Old 09-26-03, 11:54 AM
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Stock exhaust can't be too bad. I got 28mpg doing some city and freeway driving with my 87 base on its first tank under my care. Those skinny tires probably help a little.
Old 09-26-03, 02:01 PM
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yeah i mean i guess its gay because i found a way to increase hp on a n/a for not much money...that makes its gay. i dont think so. i never asked your opnion, i responded to someone genuinly intereseted, but for the little girls who want to poke fun for no reason i say go get some tampons for your ******* ****** and quite trying to grow ***** on an internet forum.
Old 09-26-03, 02:02 PM
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btw i have some gutted cats from an '87 n/a...but im presuming you want cats that work.
Old 09-26-03, 03:34 PM
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haha, ajsuper7, bad day huh?
Old 09-27-03, 10:43 AM
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lol...ya it was a bad day. much better now.
Old 09-27-03, 11:05 AM
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why not just buy a used electric leaf blower, and wire that up to your intake?
Old 09-27-03, 11:19 AM
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screw all of that! why dont you just get a big *** tank of compressed air and hook that biotch up and get a air compressor in the trunk and yeah woooh i got boost!!
Old 09-27-03, 09:26 PM
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hahah, "e-turbo" bahhhhhh.
Only way they are REALLY going to work is if you change your muffler bearings with those new rotary style titanium bearings.
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