Top End

[TonysS13]

i own a stock s13 and its has no top end at all and u have to all admit it sucks on a s13 and that only thing that sucks on a stock one.anyways im doing a sr20det sawp soon and im concern about the top end .will it have a good top end if i install a bigger turbo than the stock one <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/confused.gif" border="0" valign="absmiddle" alt='???'>?<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/confused.gif" border="0" valign="absmiddle" alt='???'>?<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/confused.gif" border="0" valign="absmiddle" alt='???'>140 i wana hit .. maybe with some ZEX nos

[ca18guy]

You'll hit 140 with a stock SR. The reason you have no top end speed is because of the speed limiter.

PS don't buy ZEX please.

[DSC]

&quot;will it have a good top end if i install a bigger turbo than the stock one...&quot; A bigger turbo won't up your top speed any.

[crazycuban]

yeah, the top speed is determined by the gear ratio on the top gear. &nbsp;im tired as shit, so lets see if i can be coherent in explaining this...
your engine (with the det) will redline at 7500...to put it REALLY simply, if you had a 1:1 gear ratio, in theory your wheels would be going at 7500 rpm as well. &nbsp;since all the gear ratios arent 1:1, lets say your gear ratio in 5th gear is 4:1, then your wheels in theory would be spinning 30,000 times per minute. &nbsp;adding more horsepower isn't going to change that. &nbsp;to increase top speed you can either raise the redline by making it safer to rev your engine (higher revving drivetrain parts, crank, rods, etc.), or change to a higher gear ratio (expensive as nuts). &nbsp;of course, its not this simple - there are other factors, such as the size of the wheel, the final drive ratio, etc., but i'm too tired to get into that. &nbsp;
oh yeah, and why put nitrous on the sr? &nbsp;its already turbo, it'd be more cost effective and easier to put on bigger turbos, bolt-ons, shit like that, and have that power all the time, instead of nitrous, which is limited. &nbsp;of course, its all up to u, but i'd only put nitrous on the ka...or at least it makes more sense to. &nbsp;yeah....sorry...just rambling.

[sykikchimp]

I got my auto 90' 240 up to 130 before I had to slow down b/c of traffic. &nbsp;I think 130 is a pretty good bit of top end.

[DSC]

yeah, autos generally have a higher top speed than manual. If he has a manual than I dono if he could get it up that high w/out hitting the revlimiter (assuming he took the speedlimiter off)

[HippoSleek]

There are two ways to up your top speed, as mentioned here. &nbsp;First - remove speed limiter. &nbsp;Second - enough power to max out your revs in your highest gear. &nbsp;Third - adjust your ratios. &nbsp;

Since crazy was tired, I will explain what is probably the simplest way: &nbsp;get a 300zx turbo differential. &nbsp;While the NA diff is a swap for the 240 b/c it has the same final drive ratio, the 300 diff has a lower ratio. &nbsp;As a result, your car will hold each gear longer and you will gain in top speed. &nbsp;You will, however, suffer on acceleration.