Im looking for the best ET here. Havent been to the track just yet though. By the feel of the butt dyno and messing around it seems like 8k is the place to shift. However what do you guys think.




Its and M2a4 trans

M2A4 - 3.307 - 1.950 - 1.360 - 1.071 - 0.787 - 4.266

 

H-T mod "Bense" is insane with gear ratio's and tranny's. I might pm him a link to your thread and see what he has to say, he helped me out allot with my gearing.

 

where do you typically land into the next gear? Are you shifting based on the stock tach?

 

The way to determine when you want to shift is like so:

Shift at the point where you would be making MORE power at the rpm you land at after your shift than at the rpm you just shifted from.

Confusing? Read it a few times and you'll get it.........

Here is an example.

Say you make 170whp at 8000rpm but if you shift and drop to 6000rpm where you make 171whp then you should most likely shift at 8000rpm.

But you also have to take into account the torque multiplication factors of the tranny.

Your dyno only goes to 7500 and you're talking about 8000.......please post up a graph going to and past 8000.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BMo Tuning &raquo;</TD></TR><TR><TD CLASS="quote">The way to determine when you want to shift is like so:

Shift at the point where you would be making MORE power at the rpm you land at after your shift than at the rpm you just shifted from.

Confusing? Read it a few times and you'll get it.........

Here is an example.

Say you make 170whp at 8000rpm but if you shift and drop to 6000rpm where you make 171whp then you should most likely shift at 8000rpm.

But you also have to take into account the torque multiplication factors of the tranny.

Your dyno only goes to 7500 and you're talking about 8000.......please post up a graph going to and past 8000.</TD></TR></TABLE>

I have no clue what you're talking about, that just confuses me.
The h22 trans is geared like a gsr trans with a LS final drive (which is fine cause the h22 has a lower redline)

because horsepower is dependent on two factors, torque and engine rpm. notice how even the torque curve is falling, the engine is making power.

An overanalysis on this isn't going to be worth the time when you're using such a wide ratio gear box. It's not wide in comparison to most stock cars, but if you look at something like a sport bike or a real close ratio gear-box, there's a significant difference.

Also, why are you talking about 8k when this dyno is only until 7500?

It dips down but it looks like it's going back up towards the very end.

 

thats the only jpg i was given. I dont have another.

 

Judging by your graph I would set the Rev Limiter 700 rpm over 7500 and set the light at 8000 rpm which gives you that pop when you shift. If you shift slow its not going to matter cause your going to fall in RPM anyway. You have decent torque so do that and you should be pretty decent for other cars in your power range. Driving is major in racing.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Team Evol Tyrone &raquo;</TD></TR><TR><TD CLASS="quote">Driving is major in racing. </TD></TR></TABLE>

No it's not. At least not in drag racing a car that's running greater than 11 seconds. It's more of an engineering race.

 

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

No it's not. At least not in drag racing a car that's running greater than 11 seconds. It's more of an engineering race.</TD></TR></TABLE>

Bense stop playing you know better than that.