• Automotive Addicts Lounge V2- Why we are all broke:
    5,003 replies, posted
High flow cats are typically advertised as such [editline]y0[/editline] [IMG]http://www.gifmania.com/Gif-Animados-Religion/Imagenes-Supersticion/Gato-Negro-Corriendo-84375.gif[/IMG][IMG]http://www.gifmania.com/Gif-Animados-Religion/Imagenes-Supersticion/Gato-Negro-Corriendo-84375.gif[/IMG][IMG]http://www.gifmania.com/Gif-Animados-Religion/Imagenes-Supersticion/Gato-Negro-Corriendo-84375.gif[/IMG] some high flow cats
What does it matter where I buy it? It's a Magnaflow. That's a good brand right? One of you guys recommended it. Autozone's website makes it easy for me to find parts for my truck, since it only shows me things that are compatible. Can you answer my question about if it's high-flow or not, and what makes it high flow? [editline]14th May 2015[/editline] [QUOTE=slayer3032;47721517] Usually hi-flow means it's more of a "precat" or it's of a design that flows better than stock restrictive cats, this means short and often of a spun style. [url]http://acurazine.com/forums/performance-parts-modifications-126/getting-stright-story-aftermarket-cats-random-fastline-etc-700853/[/url] [url]http://www.team-integra.net/forum/blogs/michaeldelaney/5-cats-catalytic-converters-higher-flow.html[/url] In my opinion unless you have a turbo car that has a bunch of cats(WRX/Audis) where gutting them and or high flow cats are useful, just keep your OEM cat or test pipe it. On a sub 350hp car you're not going to see worthwhile gains from a high flow cat, the only real reason you may want to do anything with your cat is change the sound your exhaust makes. If you have to meet emissions, anything less than an OEM cat is garbage. Aftermarket ones are insanely bad already and a high flow cat is just asking to pay money to fail emissions.[/QUOTE] I missed your reply. Sorry. I wasn't ignoring you. DPKiller suggested a drop in K&N filter, a high-flow catalytic converter, and replacing my exhaust/muffler with a better one from magnaflow. Why would I ever get tested for emissions? I've never once heard of that even being a thing.
[QUOTE=Snoberry Tea;47722004]What does it matter where I buy it? It's a Magnaflow. That's a good brand right? One of you guys recommended it. Autozone's website makes it easy for me to find parts for my truck, since it only shows me things that are compatible. Can you answer my question about if it's high-flow or not, and what makes it high flow?[/QUOTE] Magnaflow is a good brand; I have a Magnaflow high flow cat on my car. It know it is high flow because it was advertised as such, which leads me to believe the one you linked is not. I can't really help you with the tech behind it, but ~high flow anything~ typically refers to a wider passage cross section and/or less resistance in the actual 'scrubbing chamber' [editline]14th May 2015[/editline] [QUOTE=danjee;47722025]Magnaflow is a good brand; I have a Magnaflow high flow cat on my car. It know it is high flow because it was advertised as such, which leads me to believe the one you linked is not. I can't really help you with the tech behind it, but ~high flow anything~ typically refers to a wider passage cross section and/or less resistance in the actual 'scrubbing chamber'[/QUOTE] [editline]y0[/editline] I live in CA aka emission hell and my 22 year-old car recently annihilated its smog test—with the Magnaflow.
[QUOTE=danjee;47722025]Magnaflow is a good brand; I have a Magnaflow high flow cat on my car. It know it is high flow because it was advertised as such, which leads me to believe the one you linked is not. I can't really help you with the tech behind it, but ~high flow anything~ typically refers to a wider passage cross section and/or less resistance in the actual 'scrubbing chamber'[/QUOTE] Are high-flow cats typically universal? i.e. would the one on your car work on a truck? And would having a high-flow cat on my truck actually improve its performance? It's running a 4.2L v6. I want to get more power/torque out of it and last time I asked the consensus was "better air filter / cold air intake and revamp your exhaust system" [editline]14th May 2015[/editline] I live in Florida. I don't think they test emissions here. I've never had to do it in the 7 years I've been driving.
[QUOTE=Snoberry Tea;47722035]Are high-flow cats typically universal? i.e. would the one on your car work on a truck? And would having a high-flow cat on my truck actually improve its performance? It's running a 4.2L v6. I want to get more power/torque out of it and last time I asked the consensus was "better air filter / cold air intake and revamp your exhaust system" [editline]14th May 2015[/editline] I live in Florida. I don't think they test emissions here. I've never had to do it in the 7 years I've been driving.[/QUOTE] Mine was advertised as specifically for the Miata: now, I don't know if this is JUST because it's a direct fit part, or if in addition, the 'active ingredient' is somehow correct for my specific car. Could you install one on your vehicle? Theoretically yes, because a muffler shop can cut between the flanges on your old cat and weld in the new one (as I had mine done), but I wouldn't go so far as to advise it. I don't know how/if the level of scrubbing material in the cat varies from car to car. I went high flow because it was cheaper than OEM and I was told it could give the car a little power bump and better noise. Cheaper it was, but I didn't notice any difference in the power or sound (other than my car no longer sounding like it was cooking up a batch of platinum popcorn). So I wouldn't vouch for it solely on the basis of performance gains. Also ho lee fuk that last edit got fucked up
I told you what makes it high flow, it's basically being less of a cat. This is all weld in stuff, you could weld in the cat out of a Ferrari or a Toyota Tercel and it doesn't make a difference(to the part at least). Also, Autozone is fucking terrible. The drop-in filter won't do anything, the restriction is in your air intake, resonator chambers and turbulent flow of all of those together. Being that it's a truck and designed to not hydrolock, you could probably see gains with a SRI style intake. Replacing your cat or muffler won't do anything by themselves. You won't see a difference in power or fuel mileage unless your piping is messed up or the cat is clogged. Doing both of those would definitely change the sound of your truck if that's your goal. Unless you go through your entire system, replace the headers with a better designed ones, with your exhaust upgraded in diameter and bent with mandrel bends instead of crush bends so the bends don't crush down the pipe into a less restrictive muffler you really won't see performance. Even then on most vehicles gains will be minor unless the stock bits are really restrictive unless you get a tune for all of your modifications so your ECU doesn't try to "undo" them. It's a truck, your only reason to do this would be for the sound in which you're on your own as every platform, engine and setup is specific so everything will vary. I'd probably unbolt your exhaust from the back of your cat and see what you think of it. That's the noise you have to work with so removing the cat, replacing it, adding resonators, changing pipe diameter and muffler configuration will all be dictated from there. Many states do OBD2 based testing or tailpipe sniffing on all vehicles as a requirement for registration renewal, some even require mandatory inspections similar to the UK's MOT..
Meh. I guess I'll just scrap the idea of it then. Doesn't sound like it's going to be worth the cost in terms of performance gain. [editline]14th May 2015[/editline] [QUOTE=slayer3032;47722074] Many states do OBD2 based testing or tailpipe sniffing on all vehicles as a requirement for registration renewal, some even require mandatory inspections similar to the UK's MOT..[/QUOTE] I've never had them do this. When I moved from Arkansas to Florida and got my new tags the woman at the desk only came outside to look at the car. Never went near the muffler or asked me to start it up. And when I renew my tags I do it online every year. Never had to go in anywhere for testing.
[QUOTE=Snoberry Tea;47722035]Are high-flow cats typically universal? i.e. would the one on your car work on a truck? And would having a high-flow cat on my truck actually improve its performance? It's running a 4.2L v6. I want to get more power/torque out of it and last time I asked the consensus was "better air filter / cold air intake and revamp your exhaust system" [editline]14th May 2015[/editline] I live in Florida. I don't think they test emissions here. I've never had to do it in the 7 years I've been driving.[/QUOTE] If it's a weld in part with no flanges, you weld it in. If it's a part with flanges with an application it fits that application. I'd suggest a short ram intake with a pod filter for nice induction noise along with keeping your stock cat and just picking a mild chambered muffler to replace your stock unit. You're not gonna squeeze power out of bolt-ons, not anything significant. These mods are really more about what makes you happy as a driver rather than power. If you picked up some good headers, did a high flow cat along with a larger exhaust all the way through to a non-restrictive muffler you might pick up a little hp for around $600-1000. [QUOTE=danjee;47722072]Mine was advertised as specifically for the Miata: now, I don't know if this is JUST because it's a direct fit part, or if in addition, the 'active ingredient' is somehow correct for my specific car. Could you install one on your vehicle? Theoretically yes, because a muffler shop can cut between the flanges on your old cat and weld in the new one (as I had mine done), but I wouldn't go so far as to advise it. I don't know how/if the level of scrubbing material in the cat varies from car to car. I went high flow because it was cheaper than OEM and I was told it could give the car a little power bump and better noise. Cheaper it was, but I didn't notice any difference in the power or sound (other than my car no longer sounding like it was cooking up a batch of platinum popcorn). So I wouldn't vouch for it solely on the basis of performance gains. Also ho lee fuk that last edit got fucked up[/QUOTE] All cats are pretty much the same, actual efficiency of them will dictate the application. High mileage Hondas are a bitch to smog because aftermarket cats just don't compare up. The OEM cats will happily last 150k but aftermarket ones will fail in 20k. Sure oil burning will poison them but still. [editline]14th May 2015[/editline] [QUOTE=Snoberry Tea;47722077]Meh. I guess I'll just scrap the idea of it then. Doesn't sound like it's going to be worth the cost in terms of performance gain. [editline]14th May 2015[/editline] I've never had them do this. When I moved from Arkansas to Florida and got my new tags the woman at the desk only came outside to look at the car. Never went near the muffler or asked me to start it up. And when I renew my tags I do it online every year. Never had to go in anywhere for testing.[/QUOTE] You do these modifications because they make you happy with what you did. I'm sure you could find some pep through an intake and an exhaust but you're not gonna find anything crazy on a stock ECU. I personally do mods like this because I like making my cars make a little noise. Induction noise is a glorious noise and IMO sounds far better than most exhausts, your exhaust of course is your exhaust and modifying that to suit your tastes is another thing. It's really up to you on what you do or don't. Then they don't do emissions testing, you'd definitely know if they did. Florida in general doesn't have it although they supposedly did at one point for a short while. [url]http://www.dmv.org/fl-florida/smog-check.php[/url]
Slayer pm me what you're talking about by the induction thing and give me some recommendations, please.
I ripped out the silencer in my intake of my truck, but eventually just flipped the lid on my intake which was like a free Sri. Doubt you could do it on a newer truck though. Sounded cool though. [T]http://coloradok5.com/photos/data/500/14653EGRconn_003.jpg[/t] DP if you have an intake like this, flip that shit.
[QUOTE=Snoberry Tea;47722196]Slayer pm me what you're talking about by the induction thing and give me some recommendations, please.[/QUOTE] I don't really know what I'd say in a PM. Intake noise often sounds better than exhaust noise. I don't have any recommendations for your truck, I'd just buy a cheap intake off ebay for that and toss a pod filter on it. You could also do what I did with my Civic and just gut out everything past the airbox and filter. Seems there's something somewhat like this for what I assume is your truck. [url]http://www.fordf150.net/articles/idx.php/6/021/article/Gotts-Mod-Air-Intake-Modification.html[/url] For the exhaust, you're pretty much on your own with that. Youtube and do a bunch of research to see what other people like. Just expect everything to be a lot louder than stock, the bigger the muffler the quieter it will usually be.
[QUOTE=Del91;47722236]I ripped out the silencer in my intake of my truck, but eventually just flipped the lid on my intake which was like a free Sri. Doubt you could do it on a newer truck though. Sounded cool though. DP if you have an intake like this, flip that shit.[/QUOTE] I used to make those open element air cleaners all the time. You just put a 2x4 on the table, screw the lid to to it loosely and let it spin. Then use an angle grinder to cut everything off but the top, do the same for the lower pie tin as well. Easy. Also Snoberry, if you're looking to remove some money from your bank account for some reason, then get a different intake, otherwise, you're not doing much if any improvement. The intake you have was designed to be a good intake. I've seen a lot of people with older cars try and get a air box and front intake on cars recently. That intake probably takes air right from the grill to the throttle body. The resonator can likely be taken off and changed for a solid piece of hose or pipe, and it will get louder or rather, I don't mean louder "it will give you better throttle response" I hate that term... throttle response, it's just like the word "performance" - people use those vague words to sell you stuff and that's it. The perfect throttle response, is you hit the gas and the car moves forward, how do you improve that? The only bad throttle response I can think of is you hit the gas pedal and that turns the headlights on. That's bad throttle response to me. Performance is mostly used to sell oil. "get more performance out of synthetic" What kind of performance? I ask. Will my car be a better singer or dancer? Get an ebay intake and filter. I recently found out that K&N, Spectre, and AEM all import the same damn Chinese intakes and filters, and are the same exact company, and all rebrand and relabel cheap Chinese junk, so if you're wondering why a $30 Ebay intake looks just like a $200 AEM intake, it's because they are. There's no "engineering" going on at all -it's just a warehouse that puts the stuff in different boxes. The only companies I can think of that make a real intake by themselves are Weapon R and Mishimoto, but as you could see, they don't make very many at all, so an option for your truck may not exist. I've been to SF and seen the weapon R place, and they have flow testing and all sorts of fun stuff going on to see if they're actually making a difference. They'll also help you make an intake for your car if you have something interesting. Mishimoto I believe only has a few things, like for Mustangs, BMW, and WRx's. The problem with an exhaust on a modern car - if you're somewhere with rules where you have to keep the catalytic converter is doing anything after it is mostly going to be for sound difference. The only real way to get a better flow is to get rid of it - but the problem there being that your car was designed to run with it. So you have to trick that lower 02 sensor into thinking it still exists with a plug defouler or something along those lines.
[QUOTE=Jimmaye;47721743]Thanks for that info, the one I'm looking at has a stuck sunroof and bouncey speedo cable until 50 Km/H (so fix replace those suckas). The dash light also need replacing and some other electrical issues I'd need to discuss with the owner. Its a 1987 model in a light blue colour and equipped with a 717.411. The power might a be a step up from the Skyline, if only slightly and I did swap that from a slushbox to a 5 speed manual. According to forums the Australian M102's lack a cold start valve.[/QUOTE] 87s are good, that's the first year of the upgraded fuse boxes. I wish I had an 87, they're a bit easier to troubleshoot. Also I forgot to mention that these cars eat fuses. I bought mine with a stuck sunroof but it was a corroded plastic aluminum fuse that did that. For your electrical problems, just throw away all of the current fuses, clean all of the contacts in the fuse box, and replace the fuses with [B]brass ceramic fuses[/B]. Mercedessource and a few others have really good upgrade fuses for this. Also if the sunroof is mechanically jammed, you will likely need to drop the headliner and uninstall the sunroof pan, as you need to be able to slide the roof in and out to repair the felt strips and arms. Do not force the roof using the emergency closure in the trunk. If it won't move, then you have an issue with degraded felt strips and you will have to get a replacement set from the dealer, or find a good used set out of another W201 [I](the W202 uses a completely different roof design and it's components are not cross compatible unlike the W126 and W140)[/I]
God damnit. I wish I had the time to sit here and type out shit. This fucking 80hour week is killing me. 5am-8pm and doing disaster relief on the weekend. [editline]14th May 2015[/editline] [QUOTE=Del91;47722236]I ripped out the silencer in my intake of my truck, but eventually just flipped the lid on my intake which was like a free Sri. Doubt you could do it on a newer truck though. Sounded cool though. [T]http://coloradok5.com/photos/data/500/14653EGRconn_003.jpg[/t] DP if you have an intake like this, flip that shit.[/QUOTE] Neat. Will see what it does.
I might see if I can try that Gott's Mod thing, see if that works. Also take a look under the hood and see if I could do what Del did. You literally just flipped the cap on the air filter right, Del?
Your truck, I can guarantee, does not have a filter like that.
[QUOTE=Trekintosh;47721435]My second gear goes to 82 B) [editline]13th May 2015[/editline] IIRC my gears go 51, 82, 101, ∞. It bounces off the limiter at 117 at 2800 RPM.[/QUOTE] Hahahahahaaaaa PIs limit at 129/139 On the other hand, idk if LXs do the dreaded 4-2 drop shift when you floor it in lower 4th. Im curious if they do.
[QUOTE=Birdman101;47723852]Hahahahahaaaaa PIs limit at 129/139 On the other hand, idk if LXs do the dreaded 4-2 drop shift when you floor it in lower 4th. Im curious if they do.[/QUOTE] Mine will downshift to first at anything below 36mph, second anything below ~65 or so. So yes, it will happily shift down from 4 to 2 and it works fine. unfortunately, due to the absurdly tall rear end, I've got no power from 37-55 or so. 37 is too high for it to shift to first, but way low in the powerband for second.
I've been looking at VW Corrados and Scirrocos. Terrible idea? Y/N
Yeah, your 2000+ ford probably doesn't have an intake like my 88 Chevy did. :v:
[QUOTE=CoilingTesla;47723825]Your truck, I can guarantee, does not have a filter like that.[/QUOTE] Yeah I took a look. It's a giant honking cylinder thing. [t]http://i.cubeupload.com/ldTe6G.jpg[/t]
[QUOTE=Snoberry Tea;47724504]Yeah I took a look. It's a giant honking cylinder thing. [t]http://i.cubeupload.com/ldTe6G.jpg[/t][/QUOTE] That's the air filter.
[QUOTE=CoilingTesla;47724570]That's the air filter.[/QUOTE] Yes I know that's why I took a picture of it
[QUOTE=Trekintosh;47724125]Mine will downshift to first at anything below 36mph, second anything below ~65 or so. So yes, it will happily shift down from 4 to 2 and it works fine. unfortunately, due to the absurdly tall rear end, I've got no power from 37-55 or so. 37 is too high for it to shift to first, but way low in the powerband for second.[/QUOTE] Yeah, I hear you there, on the lack of midspeed power part. The 4-2 shift can be really hard on Vic tranny's, and most people who have more than stock power will either use the o/d button to shift to 3rd before flooring it, or use that modification I forgot the name of that speeds up shifts and also makes it hit 3rd for about a second before hitting 2nd if it still needs it.
[QUOTE=dwt110;47720181]jesus thats a fast auto also did that second gear run until 70+ mph?[/QUOTE] Yup, kinda expected more. My 2.0 4-banger has no problem doing 70 in 2nd.
[QUOTE=Snoberry Tea;47723774]I might see if I can try that Gott's Mod thing, see if that works. Also take a look under the hood and see if I could do what Del did. You literally just flipped the cap on the air filter right, Del?[/QUOTE] Listen to someone who has a 2002 F-150 with the 5.4: 1) Get a cheap CAI with a re-useable filter. You won't see much of a performance gain without a tune, but there is a slight improvement in throttle response. 2) If your state doesn't do emissions test, yank out the cats and put blank pipe. The coils in those trucks tend to go out, clogging the cats. I wouldn't mess with a muffler unless you want a different sound. A more free flowing exhaust system will hurt exhaust velocity, messing with exhaust scavenging, therefore causing you to lose low end torque.
I tried finding a cheap SRI/CAI on ebay, but they're all $170+. The one I found for my car was $35, for the intake pipe, PCV hose, and cone filter. It even came with a free bracket that was completely useless. Anything close to that for the 4.2L V6 was $200+ "name brand" shit.
[QUOTE=CoilingTesla;47724976]I tried finding a cheap SRI/CAI on ebay, but they're all $170+. The one I found for my car was $35, for the intake pipe, PCV hose, and cone filter. Anything close to that for the 4.2L V6 was $200+ "name brand" shit.[/QUOTE] They are worth it in the long run.
[QUOTE=Silence I Kill You;47724947]Listen to someone who has a 2002 F-150 with the 5.4: 1) Get a cheap CAI with a re-useable filter. You won't see much of a performance gain without a tune, but there is a slight improvement in throttle response. [/QUOTE] You used that phrase. What improvement happens in the throttle response? The throttle always responds.
[QUOTE=Serj22;47725013]You used that phrase. What improvement happens in the throttle response? The throttle always responds.[/QUOTE] Throttle response can be measured in time, probably milliseconds. In my accent with the stock airbox and restrictors, you could go WOT, and it would take almost a full second for the intake to cram itself with air and start pulling, especially below 4k rpms. With the SRI, its almost instant, except at around ~3k rpms, where there is a bit of a deadzone unless you downshift and raise rpms first. The flow changes quite a bit and there isn't any passages or baffles to travel around, the air just gets pulled straight in. I think it also has something to do with the vacuum system. There is just a lot less "slack to pull" in the airflow.
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