rpm question

Hey everyone, been looking for a new Tacoma the past couple weeks and wanted to get a v6 5 speed this time. I finally found a 96 I like and test drove it, and it seemed like it was running a higher rpm than I would feel is normal. At 70 it was running at 3k or so. Do yours run about the same?

I'm having the owner send me the gear ratio code in the morning but just curious what others are running on stock gearing. Thanks in advance

 

Look at code on door jam. Will tell you what gears truck has. Mine has 4.30 gears and at 70 mine is under 3k rpms. 4 cyl 5 speed

 

ya my 4cyl 5 speed ran at like 2500 or less and my dads v6 auto runs at 2k, thats whats making me curious

 

does it have bigger tires than stock?

 

ya it has 32" and the guy said it has 4 10 gears. he hasnt sent me the sticker yet. but i dont think the speedo has been changed. i just feel like it would get crap gas milage.

 

sounds like he just put bigger tires on it...and not gears is why its pushing 3k RPM

 

http://www.wallaceracing.com/calc-gear-tire-rpm-mph.php

 

if thats the case, why is my dads v6 auto running 2k on 31s,when the gear ratios are supposedly the same. the 5 speed must be geared lower

 

You have this backwards. Larger tires would mean lower rpms at a given speed.

Two things can possibly explain those higher rpms. And the numbers you listed are definitely much higher than stock.

If the truck has been re-geared to be able to run larger tires is the most likely possibility. Of course this would mean that the door sticker information would no longer be valid.

The other thing that can make the rpms higher than stock, is if it has tires that are smaller in size from what it came with stock. But you said it had 32s on it so this is not the case. The largest tire from the factory was 31s. On the '96 model the 31s would have been 31x10.5r15s and most likely had 4.10 gears but some of those also came with 3.90 gears.

 

that makes sense, thats the conclusion iv started to come to as well, maybe a good truck for 33s

 

Sounds normal especially if it has larger than stock tires. My 3.4l 5speed 2004 is pushing just under 3k RPMs at 70mph. If you want decent MPG's, the sweet spot for highway driving is between 60-70 mph. I can do well over that no problem, but gas mileage takes a pretty big hit.

 

sweet, thanks for the input

 

???

Bigger tires = more distance traveled per revolution = LOWER RPM at a given speed, assuming the speedo has been corrected. If you just install bigger tires, nothing will change with respect to indicated speed vs RPM although you will be traveling faster than you think.

 

My idles with an 03 v6 (5vz-fe)

cold:
1100 in park
800 in gear

warm:
750 in park
500 in gear

no stalls, thats just how my engine runs