well i am trying to figure out on a stock ITR what rpm it lands in after shifting into say 2nd or 3rd when your at full throttle. " as if you were racing"

I am asking this because I just installed the facotry K&N drop in filter and it seems to be making my rpms at a higher point when i go to my next gear. which is good.

I test drove the car after installation and when i shift from second to 3rd at full throttle the rpms are between 6200-6500. is this stock like RPMs also.

I just want to compare to a stock ITR to see if the filter did indeed up the RPMs in shifting or if it was always like that and I just never relized.

I hope this is clear, if not please let me know dont flame.

 

It's always the same rpm unless you change gear ratio's or wheel/tire sizes.

 

it's in jOOr head.

Here's the famous gearing calculator so you can play around and see, but remember that our stock tachs are of from between 200 to 400 indicated rpm and especially after 8,000:

http://www.autocrossing.com/cgi-bin/gearcalc.cgi
This one's just easier since it already provides you with stock gearing, just play with the RPM and gears and tire sizes to see around about.

 

Thanks.

buy the way aem is junk.

glad I put the stock intake back on with a modified tube flowing air to the bottom of it, plus the K&N drop in, throttle response is great, feels like the lower RPM band has some good tourqe now, and after v-tec the car pulls really well.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by The Kernel &raquo;</TD></TR><TR><TD CLASS="quote">It's always the same rpm unless you change gear ratio's</TD></TR></TABLE>

Correct.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by The Kernel &raquo;</TD></TR><TR><TD CLASS="quote">or wheel/tire sizes.</TD></TR></TABLE>

Not correct.

The ratio between the RPMs before your upshift (normally, redline) and after your upshift is exactly the same as the ratio between the gear ratio for the gear you're in before the upshift and the gear ratio for the gear you're in after the upshift.

For example, let's say you have a stock USM ITR and you upshift from second gear (gear ratio 2.105) at redline (8400 RPM) to third gear (gear ratio 1.458). Then your revs after the upshift will be 8400 * 1.458 / 2.105 = 5818 RPM. It doesn't matter what size wheels or tires you have, or what R&P (final drive) gear you're using, or whether you're at full throttle or not. The actual road speeds for those RPM will be affected by the size wheels/tires and by the FD, but the RPM after the upshift will not.

 

I just wanted to ***** it up with a couple different scenarios...

ATS 1, 3/4/5 and final drive in an itr tranny using 15" azenis and raised redline:

Transmission:
Base transmission selected: 94-01 US B16A/ITR
1st gear 3.077
2nd gear 2.105
3rd gear 1.652
4th gear 1.308
5th gear 1.033
6th gear
Final drive 4.929
Tire diameter in inches 23.44
Maximum engine speed (RPM)

Gear ShiftRPM Speed @ 9500 RPM
1st N/A 43.7
2nd 6499 63.8
3rd 7456 81.4
4th 7522 102.8
5th 7503 130.1
RPM in top gear at 70mph: 5111

************************************************** ********************

Stock itr tranny with ATS final and 15" azenis + stock redline:

Transmission:
Base transmission selected: 94-01 US B16A/ITR
1st gear 3.230
2nd gear 2.105
3rd gear 1.458
4th gear 1.107
5th gear 0.848
6th gear
Final drive 4.929
Tire diameter in inches 23.44
Maximum engine speed (RPM) 8600

Gear ShiftRPM Speed @ 8600 RPM
1st N/A 37.7
2nd 5605 57.8
3rd 5957 83.4
4th 6530 109.9
5th 6588 143.5
RPM in top gear at 70mph: 4196


Modified by Black R at 9:05 PM 1/18/2005