is it right crusing in 5th gear at 80mph the rpm is at 4000. my friend told me his b16motor at that speed stays at around 3400 so is our engine different or something wrong wif my car

 

4K is right for a GSR tranny. B16 should be higher, I think something around 4400.

 

My LS tranny makes it 4k rpm's at 80 mph as well... hmmmm.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ti3d in &raquo;</TD></TR><TR><TD CLASS="quote">4K is right for a GSR tranny. B16 should be higher, I think something around 4400. </TD></TR></TABLE>

what he said

 

gsr is exactely at 4k going 80mph
a b16 & itr is about 4.3-4.4k at 80mph
a ls is about 3.3-3.5k going 80mph

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by riceball777 &raquo;</TD></TR><TR><TD CLASS="quote">gsr is exactely at 4k going 80mph
a b16 & itr is about 4.3-4.4k at 80mph
a ls is about 3.3-3.5k going 80mph</TD></TR></TABLE>

yeah.. i dunno what CRX 1.8T is on..

 

b18c trannys are soo easy to tell speed from RPM provided your useing properly sized tires.
This only works in 5th with a GSR trans...
2.5k rpm = 50mph
4krpm = 80mph
5k = 100mph
6k =120
6.5k = 130
Double your Rpms and its your speed.. And move some decimals over.

So when your speedo is burried when your deep WOT in 5th... Check your Rpm, then slow down and do the math.

 

I think that's about right, i have a 99 gsr and it stays at 4000 rpm at 80mph.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MITSUBA &raquo;</TD></TR><TR><TD CLASS="quote">I think that's about right, i have a 99 gsr and it stays at 4000 rpm at 80mph.</TD></TR></TABLE>

same here 00gsr

 

multiply the number on the tach by 20

2 * 20 = 40mph

 

that's where it should be.

I questioned the same thing shortly aftre I got my gsr,

but I read in some article that 4k rpm @ 80 mph is normal

 

that is what mine is at as well. your car is normal

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Built B16A &raquo;</TD></TR><TR><TD CLASS="quote">yeah.. i dunno what CRX 1.8T is on.. </TD></TR></TABLE>

I wonder if my bigger wheels are throwing off the speedo or something. But on my way to work everyday, I cruise at 80 mph and it says 4k rpms.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CRX_1.8T &raquo;</TD></TR><TR><TD CLASS="quote">

I wonder if my bigger wheels are throwing off the speedo or something. But on my way to work everyday, I cruise at 80 mph and it says 4k rpms. </TD></TR></TABLE>

VERY well could be.. but your LS tranny on OEM 15" wheels should be around 3 1/4 RPM's.. you still might have the same RPM in 5th as a GSR with those wheels.. but that doens't help your acceleration. (bigger wheels dont' work that way)

 

wheels dont affect the speed reading, the speed is taken by a sensor on the trans not the wheels, it throws it off by saying 80 while in reality you might be going 90

 

yeah.. it would actually mean your going slower. but not sure what it would do to the tach.

 

What I don't understand is this:

On my way to work the CHP has 2 mobile radar units with digital displays that remind you of your present speed. The most I have ever seen my speedo off was +3 mph. I'm sure that my tach may be a little off, but oh well. I havn't gotten tickets yet, and I usually stay with the flow of traffic (letting the crazy *** people go first, they always intercept the CHP for me LOL).
Thanks fellas.

 

you werido americans....LOL. Just kidding, but for us north of the border, a GSR at 4000 rpm is at 140 km. Thats the canadian fact of the day.


I may be Canadian, but i still have a JDM Front End