I was going to Kentucky the other day from Nashville about 40 mins, and I was looking at the rpm and it was around 3000 rpm at 80mph is that normal. also 75mph was about 2700-2800rpm. I dont think thats normal, becuase I filled up the tank in Kentucky and drove back 50 miles and I used around 1/4 of my gas. Thats never happend before and Ive had my intake in for about a month and a half. I did the ecu reset after the install to clear the CEL. But Ive never seen 3000rpm at 80 mph, after the install and Its been on the highway for a while after the intake install, should I do another ECU reset??

Thanks

 

28-29 for me at 80 mph. Its normal

 

I've asked this same question before about the rpms. Everyone told me it was perfectly normal.

 

with the mods i have now, my car does 80 mph @ 2700rpm on 6th gear

 

It was never this high before it feels like its in 4th gear, but its in 5th becuase I put it in 5th but still seems to high to me. Ive had the car for 3 yrs and never seemed to be tat high at 80 always around 2500

 

Here's my 2 cents for your consideration.

First off do you have a Sedan or Coupe? AT or MT? 17", 18" 19" wheels?

Accordind to testing we did with AT Sedans sometime back, the engine rpm at 80mph is very close to 3000 for most cars. That's with the transmission in 5th gear, the stock torque converter locked up, stock grearing and stock 17" tires.

As for your gas mileage, "... used 1/4 of my gas" doesn't explain much. Did you actually use 5 gallons of gas or did the needle drop 1/4 of the gauge's range or ??? It's not unusual for the fuel gauge needle to drop more or less than the actual amount of gas used. On my car the needle drops disproportionally fast from the 3/4 to 1/2 tank mark... always has.

My car's gas mileage actually increased after installing the CAI if it's driven exactly the same way. In fact I thought I may have been wrong so I changed back to the stock aircase with the K&N drop-in filter for 2k miles and lost gas mileage. Of course all bets are off with a heavy right foot!

A full ECM reset can't hurt but it may not be needed.

 

My AT sedan w/ stock 17" runs 82mph at 3K rmp... Gas mileage has ALWAYS sucked! I avg 17-18 mpg

I thought 82 pmh at 3K rmp was good untill I realized my girlfriend's Dodge Caravan goes 80 at about 2500 rpm! Oh well...

 

RX7 does 80mph @ 3,000rpm in 5th gear so does my '05 G35 5AT: identical gearing

 

I think I do 80 at 3000rpm in my AT5 with a 6MT LSD rear end in it . I'll have to check it next time

 

2900 RPM @ 80mph, 5AT.

 

^^ ditto on 6MT set cruise at 80 every day to work and back.

 

weird, i do 80mph at 3100 RPM, i thought that was normal... all you guys doin below 3000 RPM, should i get my car checked out?!?? i have a 05 6mt coupe, thats obviously in 6th gear

 

I also have an 05 6MT and when im at 80mph im at 3100 too.

 

i haven't really paid attention to 80mph rpms
but i know around 60 my 6th gear is around 2k rpm
i think 80 is around 2700 though..not sure i'll check it out later today or something
maybe get it checked out if it's too high?
wouldn't tha tmean the clutch pad isn't gripping as much as it should
also causing more gas consumption? that's just an educated guess
i don't really know that much
all i know is that my car's clutch is starting to make noise and i only have 17k miles on it =\

 

at 2k rpm in 6th gear my car is like around 55mph, definately not 60mph. but probably something in the 05's is different