Re: Re: Engine Performance & Gas Mileage - Can You Assist Me?
On Sat, 14 Apr 2007 14:07:34 -0400, Mike Romain <romainm@sympatico.ca>
wrote: >Bud, you 'maybe' have owned a J10, but even that is doubtful seeing as >it is 'supposed' to be a quadratrac 'full time' 4x4 and yet on another >group you state you 'always' have to stop in the middle of the highway >in a snowstorm to change gears in it. > >Now you are trying to give performance advise on a 4.0? > >Your other lunatic posts are also out there to quote from. The troll in you is back!! I have owned well over a dozen 4x4's of all flavors and with 4cyl thru v8 too in the last 36 years or so and currently own 3 of them and my comments are driven by years of experiance not ego like yours. I have never said that I stopped on highway to engage 4x4 drive but I may have said you are a fool about your recommandations on the proepr use of 4x4 drive including at highway speeds. Also the principle behind performance gains are the same with all non super charged gas motors. (BTW, I have owned a 4x4 Jeep with a 258 too in years past) A gas motor is a heat engine driven by hot expanding gas (kind like you are at times) and the piston captures this and couples it to crankshaft. The engine is tuned to expect a certain amount of back pressure when it operates and the cam is timed to this. When you chop off the exhaust, the gas escapes cylinder too quickly and less of it is transfered to crank and this effect is most noticable below 3000 RPM or so. At higher RPM the duration of valve opening is reduced (relative to real time) and this loss of back pressure is not a problem most of times then. Also at lower RPMs during overlap some fuel mixture may be lost out of exhuast valve when there is no back pressure reducing MPG potentail. If you want a engine with good low RPM torque 4,6 or V8, keep exhaust stock. If you have ego problems like Mike here and you like to brag about spinning wheels on 4x4 drive on hard pavement and blow off a lot of noise and hot air take his advise. WHen you add a turbo charger the back pressure rules change because reduced back press increase turbo efficency. ----------------- TheSnoMan.com |
Re: Re: Engine Performance & Gas Mileage - Can You Assist Me?
On Sat, 14 Apr 2007 14:07:34 -0400, Mike Romain <romainm@sympatico.ca>
wrote: >Bud, you 'maybe' have owned a J10, but even that is doubtful seeing as >it is 'supposed' to be a quadratrac 'full time' 4x4 and yet on another >group you state you 'always' have to stop in the middle of the highway >in a snowstorm to change gears in it. > >Now you are trying to give performance advise on a 4.0? > >Your other lunatic posts are also out there to quote from. The troll in you is back!! I have owned well over a dozen 4x4's of all flavors and with 4cyl thru v8 too in the last 36 years or so and currently own 3 of them and my comments are driven by years of experiance not ego like yours. I have never said that I stopped on highway to engage 4x4 drive but I may have said you are a fool about your recommandations on the proepr use of 4x4 drive including at highway speeds. Also the principle behind performance gains are the same with all non super charged gas motors. (BTW, I have owned a 4x4 Jeep with a 258 too in years past) A gas motor is a heat engine driven by hot expanding gas (kind like you are at times) and the piston captures this and couples it to crankshaft. The engine is tuned to expect a certain amount of back pressure when it operates and the cam is timed to this. When you chop off the exhaust, the gas escapes cylinder too quickly and less of it is transfered to crank and this effect is most noticable below 3000 RPM or so. At higher RPM the duration of valve opening is reduced (relative to real time) and this loss of back pressure is not a problem most of times then. Also at lower RPMs during overlap some fuel mixture may be lost out of exhuast valve when there is no back pressure reducing MPG potentail. If you want a engine with good low RPM torque 4,6 or V8, keep exhaust stock. If you have ego problems like Mike here and you like to brag about spinning wheels on 4x4 drive on hard pavement and blow off a lot of noise and hot air take his advise. WHen you add a turbo charger the back pressure rules change because reduced back press increase turbo efficency. ----------------- TheSnoMan.com |
Re: Re: Engine Performance & Gas Mileage - Can You Assist Me?
On Sat, 14 Apr 2007 14:07:34 -0400, Mike Romain <romainm@sympatico.ca>
wrote: >Bud, you 'maybe' have owned a J10, but even that is doubtful seeing as >it is 'supposed' to be a quadratrac 'full time' 4x4 and yet on another >group you state you 'always' have to stop in the middle of the highway >in a snowstorm to change gears in it. > >Now you are trying to give performance advise on a 4.0? > >Your other lunatic posts are also out there to quote from. The troll in you is back!! I have owned well over a dozen 4x4's of all flavors and with 4cyl thru v8 too in the last 36 years or so and currently own 3 of them and my comments are driven by years of experiance not ego like yours. I have never said that I stopped on highway to engage 4x4 drive but I may have said you are a fool about your recommandations on the proepr use of 4x4 drive including at highway speeds. Also the principle behind performance gains are the same with all non super charged gas motors. (BTW, I have owned a 4x4 Jeep with a 258 too in years past) A gas motor is a heat engine driven by hot expanding gas (kind like you are at times) and the piston captures this and couples it to crankshaft. The engine is tuned to expect a certain amount of back pressure when it operates and the cam is timed to this. When you chop off the exhaust, the gas escapes cylinder too quickly and less of it is transfered to crank and this effect is most noticable below 3000 RPM or so. At higher RPM the duration of valve opening is reduced (relative to real time) and this loss of back pressure is not a problem most of times then. Also at lower RPMs during overlap some fuel mixture may be lost out of exhuast valve when there is no back pressure reducing MPG potentail. If you want a engine with good low RPM torque 4,6 or V8, keep exhaust stock. If you have ego problems like Mike here and you like to brag about spinning wheels on 4x4 drive on hard pavement and blow off a lot of noise and hot air take his advise. WHen you add a turbo charger the back pressure rules change because reduced back press increase turbo efficency. ----------------- TheSnoMan.com |
Re: Engine Performance & Gas Mileage - Can You Assist Me?
SnoMan wrote:
> On Sat, 14 Apr 2007 14:07:34 -0400, Mike Romain <romainm@sympatico.ca> > wrote: > >> Bud, you 'maybe' have owned a J10, but even that is doubtful seeing as >> it is 'supposed' to be a quadratrac 'full time' 4x4 and yet on another >> group you state you 'always' have to stop in the middle of the highway >> in a snowstorm to change gears in it. >> >> Now you are trying to give performance advise on a 4.0? >> >> Your other lunatic posts are also out there to quote from. > > I have never said that I stopped on > highway to engage 4x4 drive but I may have said you are a fool about > your recommandations on the proepr use of 4x4 drive including at > highway speeds. <more junk snipped> Liar! You seem to forget that Google has 'all' you nonsense saved forever, like this recent gem over on rec.autos.4x4.: SnoMan wrote: > On Tue, 06 Mar 2007 09:47:38 -0500, Mike Romain <romainm@sympatico.ca> > wrote: > >> As I mentioned, I think it would be total insanity to have to stop to go >> into or out of 4 high. I didn't think Ford was that bad..... > > > Gee I always stop to do so and have for over 30 years. Enough said. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 (More Off Road album links at bottom of the view page) |
Re: Engine Performance & Gas Mileage - Can You Assist Me?
SnoMan wrote:
> On Sat, 14 Apr 2007 14:07:34 -0400, Mike Romain <romainm@sympatico.ca> > wrote: > >> Bud, you 'maybe' have owned a J10, but even that is doubtful seeing as >> it is 'supposed' to be a quadratrac 'full time' 4x4 and yet on another >> group you state you 'always' have to stop in the middle of the highway >> in a snowstorm to change gears in it. >> >> Now you are trying to give performance advise on a 4.0? >> >> Your other lunatic posts are also out there to quote from. > > I have never said that I stopped on > highway to engage 4x4 drive but I may have said you are a fool about > your recommandations on the proepr use of 4x4 drive including at > highway speeds. <more junk snipped> Liar! You seem to forget that Google has 'all' you nonsense saved forever, like this recent gem over on rec.autos.4x4.: SnoMan wrote: > On Tue, 06 Mar 2007 09:47:38 -0500, Mike Romain <romainm@sympatico.ca> > wrote: > >> As I mentioned, I think it would be total insanity to have to stop to go >> into or out of 4 high. I didn't think Ford was that bad..... > > > Gee I always stop to do so and have for over 30 years. Enough said. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 (More Off Road album links at bottom of the view page) |
Re: Engine Performance & Gas Mileage - Can You Assist Me?
SnoMan wrote:
> On Sat, 14 Apr 2007 14:07:34 -0400, Mike Romain <romainm@sympatico.ca> > wrote: > >> Bud, you 'maybe' have owned a J10, but even that is doubtful seeing as >> it is 'supposed' to be a quadratrac 'full time' 4x4 and yet on another >> group you state you 'always' have to stop in the middle of the highway >> in a snowstorm to change gears in it. >> >> Now you are trying to give performance advise on a 4.0? >> >> Your other lunatic posts are also out there to quote from. > > I have never said that I stopped on > highway to engage 4x4 drive but I may have said you are a fool about > your recommandations on the proepr use of 4x4 drive including at > highway speeds. <more junk snipped> Liar! You seem to forget that Google has 'all' you nonsense saved forever, like this recent gem over on rec.autos.4x4.: SnoMan wrote: > On Tue, 06 Mar 2007 09:47:38 -0500, Mike Romain <romainm@sympatico.ca> > wrote: > >> As I mentioned, I think it would be total insanity to have to stop to go >> into or out of 4 high. I didn't think Ford was that bad..... > > > Gee I always stop to do so and have for over 30 years. Enough said. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 (More Off Road album links at bottom of the view page) |
Re: Re: Engine Performance & Gas Mileage - Can You Assist Me?
On Sat, 14 Apr 2007 17:53:30 -0400, Mike Romain <romainm@sympatico.ca>
wrote: > >You seem to forget that Google has 'all' you nonsense saved forever, >like this recent gem over on rec.autos.4x4.: Knock yourself out guy. Your Troll comments are held too. How do I know you have a ego problem? (beside the crap you ------) You sig is a big clue that you want to impress someone. I could list a lot there but I do not have prove anything. I have seen your kind come and go and one day your torch will go out and another troll will likely carry on for you. ----------------- TheSnoMan.com |
Re: Re: Engine Performance & Gas Mileage - Can You Assist Me?
On Sat, 14 Apr 2007 17:53:30 -0400, Mike Romain <romainm@sympatico.ca>
wrote: > >You seem to forget that Google has 'all' you nonsense saved forever, >like this recent gem over on rec.autos.4x4.: Knock yourself out guy. Your Troll comments are held too. How do I know you have a ego problem? (beside the crap you ------) You sig is a big clue that you want to impress someone. I could list a lot there but I do not have prove anything. I have seen your kind come and go and one day your torch will go out and another troll will likely carry on for you. ----------------- TheSnoMan.com |
Re: Re: Engine Performance & Gas Mileage - Can You Assist Me?
On Sat, 14 Apr 2007 17:53:30 -0400, Mike Romain <romainm@sympatico.ca>
wrote: > >You seem to forget that Google has 'all' you nonsense saved forever, >like this recent gem over on rec.autos.4x4.: Knock yourself out guy. Your Troll comments are held too. How do I know you have a ego problem? (beside the crap you ------) You sig is a big clue that you want to impress someone. I could list a lot there but I do not have prove anything. I have seen your kind come and go and one day your torch will go out and another troll will likely carry on for you. ----------------- TheSnoMan.com |
Re: Re: Engine Performance & Gas Mileage - Can You Assist Me?
On Sat, 14 Apr 2007 17:53:30 -0400, Mike Romain <romainm@sympatico.ca>
wrote: > >You seem to forget that Google has 'all' you nonsense saved forever, >like this recent gem over on rec.autos.4x4.: Knock yourself out guy. Your Troll comments are held too. How do I know you have a ego problem? (beside the crap you ------) You sig is a big clue that you want to impress someone. I could list a lot there but I do not have prove anything. I have seen your kind come and go and one day your torch will go out and another troll will likely carry on for you. ----------------- TheSnoMan.com |
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