My friend has an 01 GSR and is curious if this is normal for a GSR. He redlines 1st gear and when he upshifts to 2nd, the rpms land at 5000 rpm. He's curious if this is the normal landing point because he claims his car lacks a lot of high end power due to landing at 5k rpm.

Sorry for the confusing post, but he's been asking me to post this all day. Thanks!

 

Where the rpm lands after the shift depends only on the gear ratios and the point you shifted.

Here is a post from a discussion about this on Team-Integra.net.

Only the shifting rpm and gearing determines the landing points.

Let's take the GSR for example.
Its gear ratios are :

1st : 3.230
2nd : 1.900
3rd : 1.360
4th : 1.034
5th : 0.787

Shifting at 8000rpm the landing points would be :

1st -> 2nd : 8000 x (1.900/3.230) = ~4700 rpm
2nd -> 3rd : 8000 x (1.360/1.900) = ~5700 rpm
3rd -> 4th : 8000 x (1.034/1.360) = ~6100 rpm
4th -> 5th : 8000 x (0.787/1.034) = ~6100 rpm

As you can see the only thing that determines the landing points (provided that you have stock gear ratios) is the rpm at which you shift.

If you raise the redline to 9000 rpm the landing point for 1st -> 2nd would be 9000 x (1.900/3.230) = 5300 rpm.

So yes, that is the rpm it should be dropping to. The only way you could get it to be different would be if you changed the transmission like switching in a different final drive. No matter what you do, the rpms will drop to that point.

Here is a link to the thread. http://www.team-integra.net/fo...earch

 

Oh, i forgot to say his car is on the stock GSR tranny, with the stock gear ratio.

 

The only way he would be losing power would be if he was falling out of vtec when the revs dropped. Shifting at 8100 (redline) would mean the rpms would drop to 4800, which just happens to be the vtec switchover point for the gsr. Honda engineered the car purposefully so that it would not fall out of vtec at full throttle, so you should be good.

 

The 2nd gear upshift keeps the GSR on the VTEC lobes, but drops it out of the secondary butterfly range.

 

Can you guys explain this then: I also have a gsr tranny in my LS, and when i redline 1st at 6800 rpm, the upshift lands in 2nd gear at 5000 rpm. This doesnt make sense to me since my friends GSR lands at 5k also, but he's upshifting from 8100 rpm.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PredatorGSR &raquo;</TD></TR><TR><TD CLASS="quote">The only way he would be losing power would be if he was falling out of vtec when the revs dropped. Shifting at 8100 (redline) would mean the rpms would drop to 4800, which just happens to be the vtec switchover point for the gsr. Honda engineered the car purposefully so that it would not fall out of vtec at full throttle, so you should be good. </TD></TR></TABLE>

The crossover point for a GSR is closer to 4400 RPM. It was designed that way so that redline shifts would not fall out of VTEC operation.

 

I think thats about right because my car does the same thing.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Nine5IntegraLS &raquo;</TD></TR><TR><TD CLASS="quote">Can you guys explain this then: I also have a gsr tranny in my LS, and when i redline 1st at 6800 rpm, the upshift lands in 2nd gear at 5000 rpm. This doesnt make sense to me since my friends GSR lands at 5k also, but he's upshifting from 8100 rpm.</TD></TR></TABLE>

Different engine powerbands? Just a guess

 

You cant compair the 2 cars now that you have a GSR tranny. Everything will change because of it.

 

just a loony question here but could the revs land at like 6500 if your a very fast shifter or will if like go back down and then come back up?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by aznsins88 &raquo;</TD></TR><TR><TD CLASS="quote">just a loony question here but could the revs land at like 6500 if your a very fast shifter or will if like go back down and then come back up?</TD></TR></TABLE>

It has nothing to do w/ how fast you shift, it goes from the ratios discussed by PredatorGSR. That is what determines where your rpm's drop to. The only time my car ever did anything weird is when the clutch was slipping, so that may be why it seems "high" before actually grabbing.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Nine5IntegraLS &raquo;</TD></TR><TR><TD CLASS="quote">Can you guys explain this then: I also have a gsr tranny in my LS, and when i redline 1st at 6800 rpm, the upshift lands in 2nd gear at 5000 rpm. This doesnt make sense to me since my friends GSR lands at 5k also, but he's upshifting from 8100 rpm.</TD></TR></TABLE>

That doesnt sound right either. Your RPM should land at 4000. Maybe your gsr tranny has something different about it, or maybe your tach is off. I dont think it is possible for one car to shift at 8000 RPM and another car to shift at 6800 RPM and BOTH land at 5000RPM with the same tranny. I wonder if a different FD would effect the landing point? I am not a transmission expert but that doesnt sound right to me either.

 

Oops, yea you are right, the vtec point for gsr's is actually around 4400.

6800 x (1.900/3.230) = ~4000 rpm

If you are not landing at 4000 rpm I can only think of a couple reasons. Your clutch could be slipping, or you are feathering the clutch. If you changed the gear ratios that would also be the reason. I guess the tach could be off too. A different fd would change the landing point because it changes the gear ratios. But you should be landing at 4000rpm.

 

What FW do you have?

 

Sounds to me like someone doesn't know how to shift. And someone else does.

 

you should tell your friend to be nicer to their motor

 

Yea.. this still puzzles me. My GSR tranny is stock, just like my friends. Same final drive, gear ratios, etc. Regardless of powerband, how is it possible i'm landing at 5k rpm, and he's landing at the same rpm, when im shifting at 6800 and he's shifting at 8100. Any GSR drivers tell me what their landpoint is when they shift into 2nd?

And, my friend knows how to shift just fine, but maybe im better? jk

And yea.. he does need to be nicer to his motor, that fool beats on it like everyday.

 

Nothin wrong with a few trips to redline

I have a stock gsr and 1st to 2nd is about 5000 RPM. It is enough for the secondaries to shut off but not bad enough for it to change back to the small cam profile. It doesnt make sense to me. I do not think you have a gsr tranny. When you cruise at 60 MPH on the freeway what are your RPM at?

 

Antwan- trust me, its a GSR tranny for sure. I cruise at 80 mph at 4100 rpm. At 60, im roughly at 3k or so... maybe a bit higher.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Nine5IntegraLS &raquo;</TD></TR><TR><TD CLASS="quote">Antwan </TD></TR></TABLE>

Thats scary. Let me know when you figure it out

 

scary? dude.. you are antwan right? It's me jon.. (95integraLS from TI)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Nine5IntegraLS &raquo;</TD></TR><TR><TD CLASS="quote">Antwan- trust me, its a GSR tranny for sure. I cruise at 80 mph at 4100 rpm. At 60, im roughly at 3k or so... maybe a bit higher. </TD></TR></TABLE>

Those are about right. Your situation makes no sense though. Only thing I could think of is that the clutch is slipping. Are you absolutely sure it is landing at 5k?

 

Yes.. i am absolutely sure it lands at 5k. I have a video clip of me accelerating if you would like to see it. I'm also sure his lands at 5k too, and his clutch isnt slipping either.

 

I used to land at about 6800rpms in my stock gsr.