xB Manual, What is rpm at 70 mph ?

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May 4, 2005 | 09:40 PM

trish

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From: Chicago

xB Manual, What is rpm at 70 mph ?

Hi all, I'm thinking of a xB, and was wondering do they have enough oomph? I keep reading where they are underpowered.

I have a bug now and it runs well over 3000 rpm at 70 mph, what does a xB run rpm wise at 70?

I'm wanting a stick, that should help.

Anyone have any feedback?

Thanks!

Last edited by MR_LUV; Jun 20, 2018 at 06:21 PM.

May 4, 2005 | 10:07 PM

Tomas

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Just using the stock tire size, the differential ratio, and the top gear ratios of the xB with manual or auto transmission I come out with these figures, plus or minus maybe 10 RPM...

AUTOMATIC:

2560 RPM @ 60 MPH
2990 RPM @ 70 MPH

MANUAL:

3070 RPM @ 60 MPH
3580 RPM @ 70 MPH

Hope that helps...

May 4, 2005 | 10:11 PM

HotXB

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The numbers for the manual look correct. I'm running 17's and at 80 mph I'm turning 4000. We drive fast in Atlanta.

May 4, 2005 | 10:14 PM

BrianxB

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80mph turns 4000 rpm in my stock tire size xB.

May 4, 2005 | 10:14 PM

irv_usc

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80mph is ~4000. i agree

stock wheels/tires/drivetrain

May 4, 2005 | 10:19 PM

boxlover

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Quote:

Originally Posted by HotXB

The numbers for the manual look correct. I'm running 17's and at 80 mph I'm turning 4000. We drive fast in Atlanta.

WE SURE DO!!!

May 4, 2005 | 10:28 PM

BOXCAR

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Mine turns 3500 at 70 mph with stock tires.

May 4, 2005 | 10:35 PM

xBtuner

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xB running on 17's with alot of aftermarket:

Automatic
3450 @ 80

May 4, 2005 | 10:43 PM

Tomas

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Yup.

Engine RPM for the manual transmission xB at a true 80 MPH should be 4090 RPM with stock tire diameter (3410 RPM for the automatic).

The ratios are already in the tech section, but just for interest, here they are again:

Code:

Gear / Ratio     C150 5MT                 U340E 4AT
       1st                3.54:1                         2.84:1
       2nd               1.90:1                         1.55:1
       3rd                1.31:1                         1.00:1
       4th                0.96:1                         0.70:1
       5th                0.81:1                             –
    Reverse            3.25:1                         2.34:1
  Final Drive          4.31:1                         4.15:1 

        (Stock tire revolutions per mile = 880)

(tire rev per mile) * (final ratio) * (trans gear ratio) = (engine RPM at 60MPH)

(Remember, too, that this is the *actual* speed and RPM, not what the instruments show - they have tolerences and errors...most speedometers are optimistic. :? )

May 5, 2005 | 12:20 AM

#10

Tomas

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Heheheh... I like your 'toaster' avatar, HotXB.

May 5, 2005 | 04:36 PM

#11

HotXB

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Thanks, Made it myself. You want a white one? I also have a cursor one I use without the toast. I use it instead of the standard hourglass.

May 5, 2005 | 04:39 PM

#12

squirrel

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Yup, 80 mph is appx 4k rpm. Depending on overall tire diameter and how close it is to stock.

May 5, 2005 | 05:23 PM

#13

xBino

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for 2395lbs, 108 hp does the job for such a light car. My daily driver hardly ever feels underpowered, unless I'm hauling around my fat a** friends!

May 5, 2005 | 05:46 PM

#14

Tomas

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Thank you for the offer, HotXB!

Wouldn't want to put you through the trouble of making one, though, Is it OK if I build a white one based on yours? Looks like a nice straightforward job. The most creative part is having the idea. :D

May 6, 2005 | 03:26 AM

#15

BlackScionist

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I'm ~ 3500 rpm. Only had the car for 6 months

May 7, 2005 | 01:26 AM

#16

HotXB

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Go for it Tom. Did you see BlackScionist's road trip avatar?
I like it. I'm thinking about making an XA that turns into an egg.

May 7, 2005 | 06:15 AM

#17

HawkWolf

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I pulled 3500rpm at 65 for 1600 miles. Nothing complained. A little loud... the buzzy purr of a 4 banger is hard to quiet down. It might be high, but the gearing's low to make it possible to haul around close to 3000 pounds (my stuff + someone else's stuff) at highway speeds, and toyota isn't going to make an engine that won't handle it. My xB drives as good or better than it did the day I brought it home 5k ago.