Hi guys,
 
So the car is a manual NA SW20 1991. I need to know what the speed at 7000RPM would be in each gear so I know when to change gear for a track day this Sunday.
 
I had hoped to fix the issue today by putting in a turbo cluster I had lying around and which I was told should work but now its in and the Tacho still doesn't read. I'll check the capacitors on both clusters to see if that is the problem but I have no experience with electronics so I definitely won't get this done by Sunday :(
 
So if anyone knows top speed for each gear or can show me how to calculate it using the ratio's that would be a big help! Shifting by ear is fine for DD but not ideal on the track haha

So I found a good calculator here - http://www.osella.com.au/gear-ratios.htm
 
But I'm not sure on the ratio's for my particular model especially the final drive, seems like it could be either 3.944 or 4.176 acording to this - http://www.mr2.com/forums/archive/index.php/t-89418.html
 

3 .944 is almost certain as final drive ratio.
Gen 3 Rev 5 Owners manual states.   Max speed in gears. 1st- 61  2nd- 102  3rd- 152  4th- 196.
So easy to member-   50  100  150  200   done.

Just change gears when the power drops off. Its around 6k. Will save a lot of effort.
BTW, best of luck with the trackday!

Have to agree with B24, no need to rev past where the power drops off

Yep as above. And you can always take it to the rev limiter if you want to know absolute max revs/speed.

Cheers

Thanks for the advice guys! Putting 6000 into the calc gets me:
1st - 55 km/h
2nd - 92 km/h
3rd - 137 km/h
4th - 176 km/h
5th - 221 km/h
 
Just one more question, I have 4-1 headers which supposedly shifts the powerband upwards, should I compensate for that or do you think it won't have too much effect?

Don't worry about the power band shifting potentially by a few hundred rpm, I would concentrate more on learning and perfecting your car's handling, cornering, heel and toeing etc.

Also be mindful with a helmet on and the noise of other cars nearby, the sound of the car is quite different and it's easy to hit the rev limiter until you get used to it. That's what I found the first time I went on the track.

I'm regard to your tacho not working, isn't the cluster fed a signal from the ecu? Could be a broken wire/connections.

Cheers

I did my first track day a fortnight ago, and I just went by the feel of the power band. I couldn't really hear anything through the helmet so I would just wait for the end of the power band and shift accordingly. 

as for the cluster, did the NA one that was in previously move at all? even the slightest? if so, it will be a capacitor issue

I definitely have a long way to go as far as driving skill is concerned haha! I'm finding it hard with heel and toeing to maintain even brake pressure, when I hit the throttle I also push harder on the brake and I feel like it upsets the balance of the car a little. Practice makes perfect I guess!
 
I'm pretty sure the tacho is run of a signal but the speedo is mechanical since my car is an early model. When the tacho went it used to move a little and hot or cold would change how much it moved. I didn't worry about checking the capacitors because the odometer was broken (dodgy mechanic wound it) so I just got a new cluster.
 
With the new cluster the tacho jumps up a little on startup but thats it. And the temp gauge doesn't work either! I'm going to pull it out again today and make sure I don't have a loose connection, but if not I'll put the old one back in for the track as I definitely want to know if the engine gets too hot.