cat delete= slower?
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cat delete= slower?
i cut my cats off last night, it got loud as hell. i got so caught up in the sound i didn't really care about how it ran. well, today i decided to run my 0-60 time just to see what it did, and i picked up an average of .42 seconds on three runs. it's just a friend sitting in the passenger seat with a stop watch, so there's lots of room for variables, but on an average of three runs? has anyone else noticed a drop in power after they took the cats out?
#6
A different grind cam is probably the biggest bang per buck.
Torque gets you going and out of the hole, unless you have a high stall and you are stalled up to higher hp, HP keeps you going.
Converters are so advanced now, they really aren't that much restriction unless they are messed up, or you are making quite a bit more power. Honestly if the cats are ok, your muffler is probably a bigger restriction. I don't have flow numbers to back it up, so may be talking out my butt, maybe someone does.
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well, i was looking to make it louder. where my muffler used to sit there's an SLP Loudmouth 1, so there isn't much i could do in that area. i couldn't find any information on gaining or loosing performance with out cats, so i decided to try it. i like the sound at higher rpm's, it rasps alot about 1500-2500 rpm, but i'm getting used to that. if you guys think a tune will help, then i'll give that a shot when i get the money. it might be a month or two before i get the money for a tune, but i'll let you guys know how it goes.
thanks for all the responses
thanks for all the responses
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When my truck was pretty stock, intake and a tune was all i had. I gutted the cats and ran a pipe through them so it was just like they werent there, i went from runnin 9.81s to 9.69-9.71 at the drag strip. It was a consistent gain too, maybe mine were just old and had a some **** built up in them though who knows? Damn that was a long time ago though, im pretty close to a full second faster than that now and have maybe 3 foot total of exhaust now of 3in duals. Mufflers i would think make enough back pressure as long its just not a strait through muffler.
Jon
Jon
#9
When my truck was pretty stock, intake and a tune was all i had. I gutted the cats and ran a pipe through them so it was just like they werent there, i went from runnin 9.81s to 9.69-9.71 at the drag strip. It was a consistent gain too, maybe mine were just old and had a some **** built up in them though who knows? Damn that was a long time ago though, im pretty close to a full second faster than that now and have maybe 3 foot total of exhaust now of 3in duals. Mufflers i would think make enough back pressure as long its just not a strait through muffler.
Jon
Jon
I reread, obviously you are talking 1/8 with those times..
Last edited by JYount; 02-23-2009 at 05:03 PM. Reason: reread, answered my own question...duh