well yeah i bought my car awhile back in august and yeah its my first car and my first time driving stick..i got the stick down i dont stall no more but i have no clue when to shift cuz yeah its a DX 96 EK,D16Y7 NONVTEC so theres no RPM tach..i dont even know how to read the thing anyways so yeah..what speeds do i shift?how do u read the RPM tach anyways?right now i shift

1st
1-20
2nd
20-60
3rd
60-100
4th
100+

i went to 5th gear once and it just dumped and deaccelerated..it was on the way to vegas i was going 120 in 4th gear then i hit 5th and it just dropped speed really fast..i was going 120 for 60 miles and finally the tires gave out on me and popped stranded on the 15 northbound for 3 hours..but blah heres some pics of her..i bought her pretty stock but it had gay projectors headlights so yeah..


and blah

 

1st gear 0-20, 2nd gear 20-30ish, 3rd gear 40-

 

1st 1-20
2nd 20-40
3rd 40-70
4th 70-100
5th 100+

thats reving a little low but i have the same engine you have with no tach so i dont want to over rev.

 

waaaaaah im getting
1st 0-30
2nd 30-60
3rd 60 about 85
4th -100+
and fith is just an overdrive gear for the most part, saves gas on highway but u still get a little something out of it

as far as reading a tach each number stands for x1000 so right inbetween 3 and 4 would be 3500 rpms. go ahead (dont do this all the time) run each gear untill you hear it kick back one time. youll know what your car sound like at redline for that gear also how fast you are going. thatll give you an idea of how far you can take each gear try to do it a little before you hear it kick back.
with a tach you have something to look at so it just helps you keep trach, after you drive your car long enough u should know when the hell is the best time to shift, and you wont really need to have one. i HATE big fat tachs on peoples dashes. they are nice if you have a bad *** engine, dont see the point otherwsie. if you want a tach swap the cluster out with one that has it already stock so that you dont have a huge tach taking up space on your dash, i just dont like things visualy distracting me

 

My del Sol Si has a D16Z6 and my redline on the stock tach is about 7.2kRPM. I think the base S class del Sol has the d16y7 and I know it redlines at 6.4kRPM. Everything on my car is stock, and our engines are similar but I don't know if this'll help you but my redlines per gear per speed are the following:

1st: 27MPH
2nd: 59MPH
3rd: 90MPH
4th: > 120MPH (I've never gone more than 120 in fourth, still had about 1kRPM to go before the redline)
5th: no idea.

This probably isn't very helpful, but what I want to point out is that going 100MPH in 3rd gear might not be a good idea.