You are currently viewing our community as a guest, which gives you limited access to view most discussions and access our other features. By joining our Member Supported community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload photos, content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!
If you have any problems with the registration process or your account login, please contact us.
Engine & DrivetrainDiscussions about the engine and drivetrain of your vehicle.
This is a discussion thread titled "iForce V8 Redline ?", within the Engine & Drivetrain forum, part of the Technical & Vehicle Assistance Forums category.
Redline is 5200. They pull to 5200 RPM but power drops off after about 4000 RPM and it doesn't do much after 4800 RPM. 3000-4000 is the best power range. It's kind of a narrow power band but the transmission does a good job of keeping it in that power band and it's so smooth that you don't even realize it half the time.
Interesting, so the torque curve starts dying down after 4k.. thats lower than I thought it would.. amazing it still makes 250HP + stock... and is only 4.7 L
When do they start to pull hard ? where does the bottem end start to kick in
My Tacoma pulls hard from around 2500 -2750 up to 5000... thats its power range, its kinda weak before that, or after 5k... well.. actually it has quite a bit of torque at 2000 but not what I'd call "racing power"
anyway, where does the tundra really come on strong ?
It seems to pull the hardest at around 3500 RPM. That is the engines torque peak anyway.
I've driven the v6 Tundra with automatic and stick and it seems to have about the same torque range except of course it's not as dramatic as the V8 engine. They are both DOHC engines with basically the same style intake and exhaust systems. A base 2wd regular cab Tundra with the v6 five-speed transmission will go 0-60 in 9 seconds. The SR5 V8 access cab 2wd automatic Tundra will do that in 7.9 seconds. The v6 could roast the tires pretty easily on my friend’s manual T-100 indicating good low-end torque, which is why you may get the jump on some of the cars you have raced.
You are always telling us how quick your truck is that you street race all the time. If your Tacoma is really that fast than you should take it to the track at least once and see what it can do? It’s fun and you don’t risk killing someone, getting into an accident, or losing your license. I bet you could get a 15.5 quarter mile with it if you’re a good driver and you have the proper modifications. Try it and see what you get!
Anyway, I'm looking at the hp chart of the V8 from my 2001 sales brochure. It shows a pretty straight line up to about 3900 rpm, then it starts rounding over. From 4000 to the peak at 4800 the hp line is about half as steep as the preceding part of the line. The hp drops from 4800 to the end of the chart at 5000.
Actually doesnt your engine run better at higher altitudes? I've heard this is because of the oxygen sensors. There is less oxygen and so your engine puts more gas in the cylinders, making it run faster. No idea, thats jst what ive heard.
this is why, you engine needs the proper amount of Oxygen and Fuel at all times... like 13-14 parts of air for each part of gas (somehwere around there)
So, if you come up here where there is approx 20% + less oxygen because its thinner.. you engine has to put in less gas to keep that ratior correct so the engine runs properly.
So if you have 20% less air, and now your engine turns the fuel down 20%, you have 20% less power too... its a bummer, stuff runs like poop up here ! I used to live at sea level, however I didnt have my license yet.. but I could tell the diff in my bikes (MX)
but, if you run a properly tuned turbo or supercharged system you can take advantage of everyone else who is N/A because you can gain back that 20% .. plus additonal power (what t/superchargers normally do even at sea level) .. double advantage
Why do you think new engines run better in the cold. Your oxygen levels are more concentrated therefore the fuel burns better and you get more power. The whole concept to forced induction is to introduce more oxygen to the chambers, creating more power. Less oxygen will slow you down big time. Ever notice during the summer if it is humid out how the truck doesn't seem to pull as hard vs the cool night of winter????
__________________
Sold Toyota Tundra.....
Bought a honda.....Good luck everyone...This was one of the best websites I have ever seen for a vehicle as far as information goes. I have learned so much from you guys. Thanks......
TundraSolutions.com is a registered trademark of Tundra Solutions, Inc.
Other trademarks and brands are the property of their respective owners. Use of this Web site constitutes acceptance of the TundraSolutions.com User Agreement and Privacy Policy.
iForce V8 Redline ?
Linear Mode
