what is your RPM at 70mph?

Insight Mike · Jan 3, 2013

Hi, I just changed my fuel pump, injectors, and supercharger pulley. At the same time, I cut my exhaust.

I can't say for sure, but I feel like my 4Runner speeds down the road now at a low low RPM.

When I'm going 70mph, I'm at around 2200RPM.

Is that everyone else's normal? For some reason, I feel like the RPM in overdrive used to be a bit higher at that speed...

Thanks everyone,
Mike

02 Sport Edition
Supercharged, TRD trans oil cooler, supra injectors, upgraded fuel pump, 2.1" S/C pulley.

Millerad1651 · Jan 3, 2013

That's about normal for me.

nissanh · Jan 3, 2013

Exactly,

Before I changed the spark plus and oil change (axles) 2900 rpm for 80 MPH.

It is now at 2500 rpm at 80 MPH. Now I get 17.5 miles per gallon

BlackCat914 · Jan 3, 2013

nissanh said:
Exactly,

Before I changed the spark plus and oil change (axles) 2900 rpm for 80 MPH.

It is now at 2500 rpm at 80 MPH. Now I get 17.5 miles per gallon

haha, lol. :flypig:

blizz86 · Jan 3, 2013

nissanh said:
Exactly,

Before I changed the spark plus and oil change (axles) 2900 rpm for 80 MPH.

It is now at 2500 rpm at 80 MPH. Now I get 17.5 miles per gallon

I dont get if you are just saying random stuff as a troll, or if you just arent sure lol. Ive read a few of your other posts and these are my thoughts quite a few times now, but I'm not sure because sometimes you are relevant.

But at 70, im about 2200 rpm. I would imagine it being a little less for you since you have a blower?

nissanh · Jan 3, 2013

sorry!

theizzardking · Jan 3, 2013

blizz86 said:
I dont get if you are just saying random stuff as a troll, or if you just arent sure lol. Ive read a few of your other posts and these are my thoughts quite a few times now, but I'm not sure because sometimes you are relevant.

But at 70, im about 2200 rpm. I would imagine it being a little less for you since you have a blower?

he just doesn't feel like typing out a novel, he's basically saying since the tune up , things are running better now, lower rpm=less work for the engine= better mpg's = happier truck..not to worry thing are good as long as you aren't to low and the engine picks up and goes when it should

BlackCat914 · Jan 3, 2013

theizzardking said:
he just doesn't feel like typing out a novel, he's basically saying since the tune up , things are running better now, lower rpm=less work for the engine= better mpg's = happier truck..not to worry thing are good as long as you aren't to low and the engine picks up and goes when it should

That's our whole point, which I'be stated in another thread. Performing general maintenance has no effect on final drive ratio.

shadow247 · Jan 3, 2013

BlackCat914 said:
That's our whole point, which I'be stated in another thread. Performing general maintenance has no effect on final drive ratio.

I think he's a troll, or wasn't paying attention before. The only way to affect RPM's at a given speed is to change the tire size or final drive ratio.

theizzardking · Jan 3, 2013

BlackCat914 said:
That's our whole point, which I'be stated in another thread. Performing general maintenance has no effect on final drive ratio.

well a link to this thread would be nice for a point of reference........i think it's funny how all of these people's tach's and speedos broke right after doing some maintenance....remember drive ratio shouldn't change but there's a lots of sensors doing work and picking up on things which could cause a change in running efficiency,even things like colder air in the winter will have an effect,it's a complete system with many things coming into play, and can be cumulative i know for one i'm not putting the research hours to figure out where the gains are coming from, just be happy and drive.

theizzardking · Jan 3, 2013

shadow247 said:
I think he's a troll, or wasn't paying attention before. The only way to affect RPM's at a given speed is to change the tire size or final drive ratio.

probably the latter, i must admit i didn't read what was going on here at first.

UnderFire · Jan 3, 2013

Stock 2.7, 5 Speed and 3.42 Rear End goes 65 @ 2100RPM

jreask · Jan 3, 2013

3.4L 5 Speed Manual. 142 K miles. 2600 RPM's at 70 MPH.

nissanh · Jan 3, 2013

shadow247 said:
I think he's a troll, or wasn't paying attention before. The only way to affect RPM's at a given speed is to change the tire size or final drive ratio.

I have an automatic transmission. There is no direct contact between the engine and the rear wheels. It is all fluid based. If my truck has a greater friction at the rear end etc., engine must rev higher to give a more torque at the torque converter.

Case is different for 5 speed.

BlackCat914 · Jan 3, 2013

nissanh said:
I have an automatic transmission. There is no direct contact between the engine and the rear wheels. It is all fluid based. If my truck has a greater friction at the rear end etc., engine must rev higher to give a more torque at the torque converter.

Case is different for 5 speed.

Wait, what?

shadow247 · Jan 3, 2013

nissanh said:
I have an automatic transmission. There is no direct contact between the engine and the rear wheels. It is all fluid based. If my truck has a greater friction at the rear end etc., engine must rev higher to give a more torque at the torque converter.

Case is different for 5 speed.

I'm not touching that statement with a 10 foot pole. Maybe someone else will..

:hiding:

BlackCat914 · Jan 3, 2013

nissanh said:
I have an automatic transmission. There is no direct contact between the engine and the rear wheels. It is all fluid based. If my truck has a greater friction at the rear end etc., engine must rev higher to give a more torque at the torque converter.

Case is different for 5 speed.

02SE · Jan 3, 2013

shadow247 said:
I'm not touching that statement with a 10 foot pole. Maybe someone else will..

:hiding:

I thought about typing a long-winded dissertation on lock-up torque convertors, and how they can form a direct mechanical link between the impeller and turbine when certain parameters are met, by way of a lock-up clutch.

But figured it wasn't worth my time...

:biggrin1:

nissanh · Jan 4, 2013

clearly not a good day for me..

Monkeybutt2000 · Jan 4, 2013

nissanh said:
I have an automatic transmission. There is no direct contact between the engine and the rear wheels. It is all fluid based. If my truck has a greater friction at the rear end etc., engine must rev higher to give a more torque at the torque converter.

Case is different for 5 speed.

You need to do some more reading. Final drive ratio CANNOT be changed by a simple fluid change. PERIOD.

what is your RPM at 70mph?

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