Intake, Tornado, and Gas Mileage MPG 99 Chevy Tahoe 350
- Thread starter WorleyGuy
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Holy Crap!!
I never expected so much input.
Thank you all for your comments, knowledge, and jokes (magnets).
What I meant of Tahoe's exhaust is that it's less restrictive and it's not a larger diameter. I'm not sure what the back pressure is, but I will research it.
I do know one person who has a K&N intake and filter, has re-programmed their computer with a Hypertech Programmer (I think it's a Hypertech). His truck has the same 5.7 and he did notice a power increase. As many of you mentioned, it's the right foot that can determine gas mileage. Like I said, my friend did these things to his 5.7 and hasn't changed back to stock. He has a light right foot too. I think I will do some experimenting, along with more research, to determine what I can do.
I have some heat sheilding material I may wrap around the intake. Also, a lower temperature termostat, and/or performance pulley.
I'm curious what you guys and girls have to say about those things?
Thanks everyone, I pre-ciate it!
I'll post notes to let you all know what I've done to my Tahoe, right or wrong.
WorleyGuy
I never expected so much input.
Thank you all for your comments, knowledge, and jokes (magnets).
What I meant of Tahoe's exhaust is that it's less restrictive and it's not a larger diameter. I'm not sure what the back pressure is, but I will research it.
I do know one person who has a K&N intake and filter, has re-programmed their computer with a Hypertech Programmer (I think it's a Hypertech). His truck has the same 5.7 and he did notice a power increase. As many of you mentioned, it's the right foot that can determine gas mileage. Like I said, my friend did these things to his 5.7 and hasn't changed back to stock. He has a light right foot too. I think I will do some experimenting, along with more research, to determine what I can do.
I have some heat sheilding material I may wrap around the intake. Also, a lower temperature termostat, and/or performance pulley.
I'm curious what you guys and girls have to say about those things?
Thanks everyone, I pre-ciate it!
I'll post notes to let you all know what I've done to my Tahoe, right or wrong.
WorleyGuy
The web site for this TV station WROC TV in Rochester,NY,(NEWS 8 NOW), is: www.wroctv.com
I beleive the segment was done by tv anchor/reporter Cathy Orosz.
I beleive the segment was done by tv anchor/reporter Cathy Orosz.
That's the best way to do it for mileage and general driveability.
I'd always go for less back pressure in the exhaust, as long as it isn't creating problems.
Unless it throws a code (Code 32), I think you're good. You'd probably need to do headers to get that code.
I wouldn't bother with changing the thermostat or pulleys. There are many variables that were considered by the engineers when they designed those parts, and there are probably good reasons they did it the way they did. These aren't components from which they saved money or reduced noise specing it the way they did.
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Aside from going to a lower temp thermostat ..just about any quality aftermarket part will have some beneficial effect ... at least "apparently". It's just a real loser in terms of rate of return. I spent about $600 total for my roller rockers for my 4.0. The yield was maybe 11-15 hp variable ...or about 50-75 bucks a hp ..and the thing never sees over 2200 rpm on an average day. A Borla cat back system for a 199X (I think) 5.0 Mustang (from a former dyno graph on their site) yielded about 11 hp ..at some astronomical rpm. Cost ..probably over $500 FOB and not user friendly for the install(??).
A package vehicle is a compromise for one size that is designed to fit many/all and do it at a competitive price. If you're subjecting it to a narrow set of conditions for a majority of its operational time, then you may be able to shift that compromised design to favor your use ..but you're probably going to outstrip any gains with the cost of the part.
It's more a situation of experiencing nature's way of saying that you make too much money
Not a user friendly link. I really had to dig for the info. Here's the video for the tested tornado.
I like the explaination the mechanic gives on how he thinks it works!
I like the explaination the mechanic gives on how he thinks it works!
road_rascal,
Did you enjoy the piece? I still won't buy a Tornado. Because this is the only source of info that I have seen or read that shows an increase in mpg or power, I would want a 30 day trial with a money back garantee.
Did you enjoy the piece? I still won't buy a Tornado. Because this is the only source of info that I have seen or read that shows an increase in mpg or power, I would want a 30 day trial with a money back garantee.
I like how the guy says it helps mix the fuel and air together. Maybe someone should show him what the insides of a 4.6 Ford engine looks like
.
How do we explain the increased MPG based on their test? It's HUGE! An increase of 18.75 mpg.
The news station would have to explain the inconsistency, but my guess is that the tank probably wasn't as full before the first run.
I had the same problem with an 99 Yukon. Can you say trade in! Now I got an 05 silverado and now get 19.5 vs 13.4 with the OL TANK!
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