Who makes THE best 3 high flow CAT?
01-30-04, 12:03 AM
#1
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Who makes THE best 3 high flow CAT?
I am having a hard time finding a 3 cat anywhere, and ones I can find dont seem to be rotary specific. I want the best flowing, good longevity CAT I can find .. but it still has to be smog able. Can anyone help me out?
-Robert
-Robert
01-30-04, 12:34 AM
#2
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Mike(j9fd3s) used a 3" CatCo for his 20b. He was complaining about the limited options too. No feedback on it yet though. It's only been on the car for a few weeks. It's actually smaller than the stock FC one. 
Good luck and post feedback when you finish it. I'm also looking to run a 3" cat for streetdriving.
Steve
Good luck and post feedback when you finish it. I'm also looking to run a 3" cat for streetdriving. Steve
01-30-04, 01:03 AM
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Ya, I gotta smog this thing again in Sept. The visual is not a worry .. but I do have to pass the sniffer. Plus it's sooo F-in loud now that I can't drive it past 10PM cause my neighbors will freak. The noise is really starting to get to me.. so I am hoping to quiet it down without to much power loss, and be able to smog it in Sept without to much F-in around.
I hope someone has idea's, but I will let you all know if I find anything .. I am going to make some phone calls tommorow.
I hope someone has idea's, but I will let you all know if I find anything .. I am going to make some phone calls tommorow.
Last edited by Rpeck; 01-30-04 at 01:06 AM.
01-30-04, 01:16 AM
#4
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I've been running a magnaflow (car sound) 3" with air hookup for a while.
no idea what the inside is like or if it's holding up since it hasn't been off. but I've passed emissions 2 years in a row with it.
no idea what the inside is like or if it's holding up since it hasn't been off. but I've passed emissions 2 years in a row with it.
01-30-04, 01:25 AM
#5
This is a good thread, I've got an RB downpipe and presilencer right now. Which is 2.5 ID (which is plenty IMO). They make a presilencer/Cat replacement pipe which is also 2.5 ID and claims to take alot of the sharp exhaust notes out.
I was looking on summit thinking about getting something legal for MD emissions. When you mentioned Catco I thought damn, that's a good idea.
I looked up this model
3 ID)
http://store.summitracing.com/partde...art=CTO%2D2907
And thought I could just take my old presilencer in to an exhaust shop with that and just have them weld flanges/pipe on to be a direct swap.
I think i'm going to do this (with the 2.5 ID model) mainly because it would be a quick swap between the two for track days, it will probably knock a little noise out during street/daily driving and, it's 50 state legal for emissions.
I was looking on summit thinking about getting something legal for MD emissions. When you mentioned Catco I thought damn, that's a good idea.
I looked up this model
3 ID)http://store.summitracing.com/partde...art=CTO%2D2907
And thought I could just take my old presilencer in to an exhaust shop with that and just have them weld flanges/pipe on to be a direct swap.
I think i'm going to do this (with the 2.5 ID model) mainly because it would be a quick swap between the two for track days, it will probably knock a little noise out during street/daily driving and, it's 50 state legal for emissions.
01-30-04, 01:37 AM
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Not to chap anyones hide here, but I have heard Catco is more or less a 1 year cheap Cat to pass smog with your Honda type of cat.
I mean a 3" Cat for $66 ? When a 2.5" Bonez (rotary specific) cat is $250! I mean what is the diference? I assume the bonez has to be much better made, but they do not make a 3"
Money is not an issue, I want somthing that will not burn up, or clog, or fail a year after I put it in. I am just awfuly weary of a $60 3" Cat ... plus I wonder how the flow is on a cat that cheap.
know what i mean?
I did find these guys;
http://www.randomtechnology.com/universal.html
Anyone heard good or bad about them? I sent them an E-mail to ask about rotaries .. heat Etc. and there products.
I mean a 3" Cat for $66 ? When a 2.5" Bonez (rotary specific) cat is $250! I mean what is the diference? I assume the bonez has to be much better made, but they do not make a 3"
Money is not an issue, I want somthing that will not burn up, or clog, or fail a year after I put it in. I am just awfuly weary of a $60 3" Cat ... plus I wonder how the flow is on a cat that cheap.
know what i mean?
I did find these guys;
http://www.randomtechnology.com/universal.html
Anyone heard good or bad about them? I sent them an E-mail to ask about rotaries .. heat Etc. and there products.
Last edited by Rpeck; 01-30-04 at 01:41 AM.
01-30-04, 05:42 AM
#7
Well, it does carry a 25k mile warranty, which isn't much... but it's enough for me, that doesn't drive it daily.
I look at a catalytic converter the same way any mechanic or dealership would. It's a wearable item. And it's not a "Saftey" wearable item, like brake pads or shocks are. I would rather slap it in to pass emissions every two years rather then have a perminant restriction in exhaust flow (compared to a non-legal catalytic presilencer).
I look at a catalytic converter the same way any mechanic or dealership would. It's a wearable item. And it's not a "Saftey" wearable item, like brake pads or shocks are. I would rather slap it in to pass emissions every two years rather then have a perminant restriction in exhaust flow (compared to a non-legal catalytic presilencer).
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01-30-04, 10:19 AM
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Originally posted by f1blueRx7
Well, it does carry a 25k mile warranty, which isn't much... but it's enough for me, that doesn't drive it daily.
I look at a catalytic converter the same way any mechanic or dealership would. It's a wearable item. And it's not a "Saftey" wearable item, like brake pads or shocks are. I would rather slap it in to pass emissions every two years rather then have a perminant restriction in exhaust flow (compared to a non-legal catalytic presilencer).
Well, it does carry a 25k mile warranty, which isn't much... but it's enough for me, that doesn't drive it daily.
I look at a catalytic converter the same way any mechanic or dealership would. It's a wearable item. And it's not a "Saftey" wearable item, like brake pads or shocks are. I would rather slap it in to pass emissions every two years rather then have a perminant restriction in exhaust flow (compared to a non-legal catalytic presilencer).
01-30-04, 11:57 PM
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Thought I would bump for more ideas. I got an E-mail back from random tech .. and they asked if I needed a air pipe on the CAT, I replied yes, and they have not back to me yet.
01-31-04, 01:07 AM
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Not to steal your thread but I have a quick question: Do you guys think a 3'' exhaust is needed on these cars? I know with DSMs 3'' is needed or you will be restricted if you have a lot of mods, but is it the same way with the RX7? Or is 2.5'' sufficent? Cause I see a lot of 2.5'' products at RX7-tailored websites but not too many 3''. I know bigger is better but is it worth it? BTW I will have a S5 TII. Thanks!
BTW I have heard good and bad things about the catco 3'' cat. I've heard it doesn't last too long but it flows good and passes emissions!
BTW I have heard good and bad things about the catco 3'' cat. I've heard it doesn't last too long but it flows good and passes emissions!
01-31-04, 02:08 AM
#12
Originally posted by Rpeck
well thats 25K on a normal piston powered car i would assume. Not to many piston cars shoot 2' flames out dual exhaust under boost. I just think it would burn up in no time at all if it's not really well made. I plan to use this as a permanent solution to my sound problems even if I loose some power. The fines here in CA are outragous if you get caught without a CAT ... it's just not worth the risk to me If I can find a really good flowing legal cat .. that will hold up under heavy weekend driving.
well thats 25K on a normal piston powered car i would assume. Not to many piston cars shoot 2' flames out dual exhaust under boost. I just think it would burn up in no time at all if it's not really well made. I plan to use this as a permanent solution to my sound problems even if I loose some power. The fines here in CA are outragous if you get caught without a CAT ... it's just not worth the risk to me If I can find a really good flowing legal cat .. that will hold up under heavy weekend driving.
-Mike
01-31-04, 02:21 AM
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Originally posted by SpeedFreak03
Not to steal your thread but I have a quick question: Do you guys think a 3'' exhaust is needed on these cars? I know with DSMs 3'' is needed or you will be restricted if you have a lot of mods, but is it the same way with the RX7? Or is 2.5'' sufficent? Cause I see a lot of 2.5'' products at RX7-tailored websites but not too many 3''. I know bigger is better but is it worth it? BTW I will have a S5 TII. Thanks!
BTW I have heard good and bad things about the catco 3'' cat. I've heard it doesn't last too long but it flows good and passes emissions!
Not to steal your thread but I have a quick question: Do you guys think a 3'' exhaust is needed on these cars? I know with DSMs 3'' is needed or you will be restricted if you have a lot of mods, but is it the same way with the RX7? Or is 2.5'' sufficent? Cause I see a lot of 2.5'' products at RX7-tailored websites but not too many 3''. I know bigger is better but is it worth it? BTW I will have a S5 TII. Thanks!
BTW I have heard good and bad things about the catco 3'' cat. I've heard it doesn't last too long but it flows good and passes emissions!
Bigger is better, and a TII not modded will do very well with 2.5"-3" wide open, a modded one will do even better with a 4". The more flow the better, with no back pressure danger on a rotary.
01-31-04, 07:12 AM
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Originally posted by Rpeck
DSM, your scaring me. nothing aginst them, but a DSM cannot even near equal the output of exhaust flow of a rotary .. for one they have valves, for 2, the only DSM's I know of are 4 cylinders. Plug in #3 here ... back pressure is required for a turbo charged piston vehicle to not burn up the valves.
Bigger is better, and a TII not modded will do very well with 2.5"-3" wide open, a modded one will do even better with a 4". The more flow the better, with no back pressure danger on a rotary.
DSM, your scaring me. nothing aginst them, but a DSM cannot even near equal the output of exhaust flow of a rotary .. for one they have valves, for 2, the only DSM's I know of are 4 cylinders. Plug in #3 here ... back pressure is required for a turbo charged piston vehicle to not burn up the valves.
Bigger is better, and a TII not modded will do very well with 2.5"-3" wide open, a modded one will do even better with a 4". The more flow the better, with no back pressure danger on a rotary.
Heres another thread where somebody regretted buying a 2.5'' exhaust only to buy 3'' later (2nd post): http://www.dsmtuners.com/forums/show...&threadid=6465
OK here is a thread where it tells that no backpressure is needed (it is said twice) and also that 3'' is the trend: http://www.dsmtuners.com/forums/show...threadid=81119
3" seems to be the trend. but you also need to remember the issue of sound...
But V8's and other NA engines require back pressure. A turbo isnt required to have the back pressure due to the turbo providing it for the engine. But I would suggest using the search function on the site in regard to your question it has been answered more than once. The answer is usually 3"
!
02-05-04, 04:39 PM
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Well folks I have decided. After quite a few E-mail corospondences with Random Technologies I have decided that they no doubt know what they are talking about, and make the best product on the market for my particular application.
Here is the CAT I have decided to go with;
http://martelbrothers.com/customer/p...00&cat=&page=1
I will keep you all posted on the results after I install it in a couple of weeks. Waiting on my new welder at the moment.
-Robert
Here is the CAT I have decided to go with;
http://martelbrothers.com/customer/p...00&cat=&page=1
I will keep you all posted on the results after I install it in a couple of weeks. Waiting on my new welder at the moment.
-Robert
02-06-04, 05:28 AM
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Rpeck,
If money is not an issue for you you could probably check the R-magic FC specific 80mm cat. I do not know what is the price on that one but you should check it.
http://www.aerodyne.net/rmagic/exhaust.htm
If money is not an issue for you you could probably check the R-magic FC specific 80mm cat. I do not know what is the price on that one but you should check it.
http://www.aerodyne.net/rmagic/exhaust.htm
02-06-04, 11:58 AM
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Originally posted by tweaked
They told me a cat for my FC was going to be like $450 or some crape like that. $200 is a much better price.
They told me a cat for my FC was going to be like $450 or some crape like that. $200 is a much better price.
-Robert
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