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Car Forum / Ford / Ford Mustang / December 2004Does an off road h-pipe increase horsepower
Or not? I hear alot of different stories on this....Does it really boost HP'S a bit or not at all? I just bought one to go along with my flowmaster exhaust, and wanted a beat louder deeper sound and maybe some increase in HP'S... How do you rate the MAC off road h-pipe comapred to others? Oh Jesus, YOU again? Are you never gonna learn? Damn, it's time for the infamous Dave Lyon's Village Idiot Application to come out of retirement. ....Needless bs snipped. ///Mike TS #63 1993 BMW 525i http://community.webshots.com/user/mpompe2 Pics of all the old cars - Newly updated I was waitin for SOMEONE to say something ;). -Mike -- A happy kid behind the wheel of a 98 Mustang GT Cold air intake FRPP 3.73 gears Steeda Tri-Ax Shifter Full Boar turbo mufflers Hi-speed fan switch 255/60R-15 rear tires Subframe connectors > Oh Jesus, YOU again? Are you never gonna learn? Damn, it's time for the > infamous Dave Lyon's Village Idiot Application to come out of retirement. [quoted text clipped - 6 lines] > http://community.webshots.com/user/mpompe2 > Pics of all the old cars - Newly updated Although I have never personally seen the dyno results for before and after, cars with off road h-pipes(friend put them on his drag car) have "seemed" faster. They were also louder, if that is what you are after. Most people around here buy hi-flow cats vs. the catless h-pipes. But yours are just for racin', right? Claud > Or not? I hear alot of different stories on this....Does it really boost HP'S a > bit or not at all? I just bought one to go along with my flowmaster exhaust, > and wanted a beat louder deeper sound and maybe some increase in HP'S... How do > you rate the MAC off road h-pipe comapred to others? It seems faster because its louder. The difference between a good set of cats and no cats is only a few horsepower and only at the high end.. nothing you're going to feel. The downside is you're going to give up low end torque that you CAN feel. Certainly not worth fouling the air for. LJH 95GT (331 stroker, Bassani catted X-pipe) > Although I have never personally seen the dyno results for before and > after, cars with off road h-pipes(friend put them on his drag car) have [quoted text clipped - 7 lines] > > and wanted a beat louder deeper sound and maybe some increase in HP'S... How do > > you rate the MAC off road h-pipe comapred to others? >It seems faster because its louder. The difference between a good set of >cats and no cats is only a few horsepower and only at the high end.. nothing >you're going to feel. The downside is you're going to give up low end >torque that you CAN feel. Damn, i thought the h-pipe would give a bit more low end since thre is no cats....Oh well, i guess i learned my lesson.... Its just so many peopl i see have the off road pipes, i figured there was some good coming out of them.... No cats???? I hope we're not talking daily driver... This happens to be my f*ckin air too. > >It seems faster because its louder. The difference between a good set of >>cats and no cats is only a few horsepower and only at the high end.. [quoted text clipped - 7 lines] > have the off road pipes, i figured there was some good coming out of > them.... Removing Cats on your exhaust system is stupid, but I gotta know Jim, what about all the pre '74/pre Catalectic converter cars on the road? Do they F*ckin bother you to? > No cats???? I hope we're not talking daily driver... This happens to be my > f*ckin air too. [quoted text clipped - 10 lines] > > have the off road pipes, i figured there was some good coming out of > > them.... catalytic  SignatureJohn ThunderSnake #59 If you Reply, be sure and remove the " (DELETE_THIS) " from the email address. > Removing Cats on your exhaust system is stupid, but I gotta know Jim, what > about all the pre '74/pre Catalectic converter cars on the road? Do they [quoted text clipped - 18 lines] >> > have the off road pipes, i figured there was some good coming out of >> > them.... Thank you... -Mike -- A happy kid behind the wheel of a 98 Mustang GT Cold air intake FRPP 3.73 gears Steeda Tri-Ax Shifter Full Boar turbo mufflers Hi-speed fan switch 255/60R-15 rear tires Subframe connectors > catalytic > [quoted text clipped - 26 lines] > >> > have the off road pipes, i figured there was some good coming out of > >> > them.... Depends on how they're used.... I have no problem with the collector/resto ideology. These things are a part of our history. For our daily drivers, I believe we should be a little more ecologically responsible. History shows that the human race can find quick ways to screw stuff up... now we have the technology to minimize our damage (notice I didn't say eliminate). All I've ever thought is that a vehicle should meet the emission requirements for the year it was manufactured. As a side note..... *most* of the people driving around in old iron have *usually* spent every available penny on purchasing that old iron and can ill afford to keep it in top notch condition.... and there goes yet another piece of history. I'm not a tree hugger..... but I'm not far away from the day I welcome grandchildren into this world...... it'd be nice if they could still go outdoors. > Removing Cats on your exhaust system is stupid, but I gotta know Jim, what > about all the pre '74/pre Catalectic converter cars on the road? Do they [quoted text clipped - 18 lines] >> > have the off road pipes, i figured there was some good coming out of >> > them.... I agree whole-heartedly about meeting emissions requirements.. reminded several times earlier tonight how nasty the smell and TASTE of exhaust is. I hate it when a biggo cloud of smoke just pours of of someone's exhaust & I happen to be right behind 'em. That stuff ticks me off. -Mike -- A happy kid behind the wheel of a 98 Mustang GT Cold air intake FRPP 3.73 gears Steeda Tri-Ax Shifter Full Boar turbo mufflers Hi-speed fan switch 255/60R-15 rear tires Subframe connectors > Depends on how they're used.... I have no problem with the collector/resto > ideology. These things are a part of our history. For our daily drivers, I [quoted text clipped - 36 lines] > >> > have the off road pipes, i figured there was some good coming out of > >> > them.... I drive my 67 without a single solitary emissions control on it about 75% of the time from Mar - Nov. The state doesn't emissions tests for vehicles past 30 years old. When I used to have to take it in, it was within given limits. The manufacture of one new vehicle creates more environmental pollution than my 67 would in 100,000 miles. Let's not forget all the new OEM parts that have to be manufactured, the vastly increased complexity and therefore increased number of (new) parts required for an average repair, and the fact the vehicle's average lifespan is most likely less than the lifespan of mine in terms of miles to begin with. A gas-electric or diesel-electric hybrid is a freaking environmental disaster, ironically enough. Think of all that newly developed expensive hardware, requiring new factory tooling, millions of hours of training, new tools, new everything, and it's sold under the guise of "environmentally responsible automobile". It's not just the air that's befouled by all of this. Sure, there is a big curve of all of that at first, that -will- level off in time. But the world's automakers keep the innovations (a.k.a. marketing ploys) coming, ensuring that one big curve just follows the next. So what's the problem? Like most, I think you're just failing to see the big picture. For the record, I'm not siding with "Beverly", either. > No cats???? I hope we're not talking daily driver... This happens to be my > f*ckin air too. [quoted text clipped - 10 lines] >>have the off road pipes, i figured there was some good coming out of >>them.... SignatureWound Up J 1967 Mustang coupe, restored & modified Remove "put her" to reply in that bucket Are you kidding us? For the record, my Fox has no cats. Why? It's a summer weekend car and there are no requirements for them where I live. and I don't have the money to buy these great exhaust systems. Everything back from the exhaust manifold on my car is used. My daily driver is a 1980 Bronco and it is LOADED with emissions crap. A 351M churns out a whopping 136 horse. NO sh.t. So be it. Brad >I drive my 67 without a single solitary emissions control on it about 75% >of the time from Mar - Nov. The state doesn't emissions tests for vehicles [quoted text clipped - 40 lines] >>>have the off road pipes, i figured there was some good coming out of >>>them.... My 87 Saleen has been stripped of the cats in favor of a 2.5" & true headers. Though it is a summer driver it has finally hit the 11k miles mark and I still pass the emissions with no problem. A car properly tuned and maintained will create less 'smog' than most lawnmowers. Oh, and as far as evil bad air-poluters how about a cudos to Mt St helens which in this past week has speewed out more carbon dioxide than all of WA industries have the entire year (or liekly more). And how about that blow in 1980... The amount of CO into the air on that big blow in one day was greater than all the factories in the US producing at maximum capacity did throughout the 1970s..yes, the entire decade. Amazing or not, the world has managed to survive and clean itself. End note: Greenhouse gases are overrated, ozone is overrated and unsubstantiated, and frankly the world could use a few extra degrees to increase the growing season to help feed all the 'extra' people. What would a good evil regime dictator do without the mases to enslave and decapitate or starve. Oh, as far as the cats, not sure what part of the power band is affected but I am certain that the better breathing can only be better for power and efficiency. I have plenty of power but now I just need to replace my clutch that finally burned off. > Are you kidding us? > [quoted text clipped - 53 lines] >>>>have the off road pipes, i figured there was some good coming out of >>>>them.... Thats 100k miles not 11k. sorry. > My 87 Saleen has been stripped of the cats in favor of a 2.5" & true > headers. Though it is a summer driver it has finally hit the 11k miles [quoted text clipped - 74 lines] >>>>>have the off road pipes, i figured there was some good coming out of >>>>>them.... You better specify which lawnmowers you are talking about... I still have a 5 horse two-stroke oil-mix gas, Craftsman lawnmower for trimming, it makes many times more pollutants then my vehicles... You lost your clutch because gutting your exhaust system robbed your LOW RPM Torque, Hence you have had to slip the clutch more since your exhaust system "modification"... > My 87 Saleen has been stripped of the cats in favor of a 2.5" & true > headers. Though it is a summer driver it has finally hit the 11k miles mark [quoted text clipped - 81 lines] > >> > >> Remove "put her" to reply in that bucket >Although I have never personally seen the dyno results for before and >after, cars with off road h-pipes(friend put them on his drag car) have [quoted text clipped - 10 lines] >How do >> you rate the MAC off road h-pipe comapred to others? No, but i guess im going to have some trouble with emissions... Most guys just put back on the cats for emissions testing.... I was just trying to find out if its worth all the changing over of cats each year.... I ran with one for a while, but went back to stock. I lost torque in the low end and lost quite a bit of mileage. I could feel it in the seat of my pants. SignatureDave 96 Rio Red GTS with a few goodies > Or not? I hear alot of different stories on this....Does it really boost > HP'S a [quoted text clipped - 3 lines] > How do > you rate the MAC off road h-pipe comapred to others? >I ran with one for a while, but went back to stock. I lost torque in the low >end and lost quite a bit of mileage. I could feel it in the seat of my I thought you would gain torque with an H-pipe....? tom Best to go with a set of Hi-Flo cats. You have no real differance in HP AND you are emissions legal AND you don't have to annually reinstall the cats. I had a custom H-pipe created and installed by a local muffler shop with hiflo cats for between $300 to $400. I can't remember the exact price, but it is comparable to a purchased premade setup. > >I ran with one for a while, but went back to stock. I lost torque in the > >low >>end and lost quite a bit of mileage. I could feel it in the seat of my > > I thought you would gain torque with an H-pipe....? tom >est to go with a set of Hi-Flo cats. You have no real differance in HP AND >you are emissions legal AND you don't have to annually reinstall the cats. >I had a custom H-pipe created and installed by a local muffler shop with >hiflo cats for between $300 to $ I guess i screwed up then... There already on the way, so im may just pay the shipping and send the off road h-pipe back.... I wonder if MACPERFORMANCE will give me a hard time refunding me? do you have any experience with them?.. thanks You have an H-pipe already on the way? Has hi-flow cats? Use it! -Mike -- A happy kid behind the wheel of a 98 Mustang GT Cold air intake FRPP 3.73 gears Steeda Tri-Ax Shifter Full Boar turbo mufflers Hi-speed fan switch 255/60R-15 rear tires Subframe connectors > >est to go with a set of Hi-Flo cats. You have no real differance in HP AND > >you are emissions legal AND you don't have to annually reinstall the cats. [quoted text clipped - 5 lines] > give me a hard time refunding me? do you have any experience with them?.. > thanks http://www.kalecoauto.com/perf.htm The last thing on the list. Its whats best for your mustang. All of those parts work very well though, you should try them. Erik D. '94 white lightning '01 white GT Air filter bypass kit........ riiiiiiiiight.. -Mike -- A happy kid behind the wheel of a 98 Mustang GT Cold air intake FRPP 3.73 gears Steeda Tri-Ax Shifter Full Boar turbo mufflers Hi-speed fan switch 255/60R-15 rear tires Subframe connectors > http://www.kalecoauto.com/perf.htm > [quoted text clipped - 4 lines] > '94 white lightning > '01 white GT Yeah, that's the one I got. If you want LOUD that's it! Tropic Green Y2K 5 Speed Mustang GT P-1SC & Some MM Stuff http://tinyurl.com/5d6dy > http://www.kalecoauto.com/perf.htm > [quoted text clipped - 4 lines] > '94 white lightning > '01 white GT H crossovers should be tuned for each engine if you really want anything out of it. paint the exhaust pipes from the manifold or header back about 3 feet. then dive it a while, where the paint stopped burning off is where the crossover should go. Chip Get the 2-cat H-pipe. You'll pass the PA smog test much better too. I believe they can also fail your state inspection for not having cats even if you're not in an emissions county. The 2-cat will give you power over the stocker, keep you legal, and keep the tone down some. I must admit, I threw a non-cat H-pipe on an e-legal cammed (not E303) '88 5.0 with 2-chamber flowmasters and it sounded great. Not my car, not my emissions or inspection hassles either. The headers will help a bit more I think. But, with no other engine mods, the exhaust upgrade won't be that noticable. JS > Or not? I hear alot of different stories on this....Does it really boost > HP'S a [quoted text clipped - 3 lines] > How do > you rate the MAC off road h-pipe comapred to others? I > believe they can also fail your state inspection for not having cats even > if you're not in an emissions county. You are right, the visual inspection of the cats is now part of the safety inspection. They no longer fall under emissions in Pa. Dave >You are right, the visual inspection of the cats is now part of the safety >inspection. They no longer fall under emissions in Pa. I didnt know they had a visual now...IMm sending the H-pipe back and getting the catted h-pipe cats suck > cats suck Dogs bite. SignatureYOU are the real piece of work in this post. I think you are a couple of drumsticks short of a picnic there bud. - SVTKate Just weld or solder the hollow cat bodies over the straight pipe. > >You are right, the visual inspection of the cats is now part of the > >safety [quoted text clipped - 3 lines] > getting > the catted h-pipe |
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