top speed

[Nismo_Dj]

what is the top speed for usdm stock s14? the cluster says up to 120mph!did a search already, some say 160mph but still not sure!

[Chezedik]

115 w/o killing the governor. About 135 w/o with basically stock TQ if it is like the S13, which I expect all things being equal, it is. BTW, the speedo means nothing. That is a Noob mistake.

[DjPantsSpecR]

i know, my buddy was looking at a Volkswagon something or other, adn the sales woman said

"look at the speedometer, it goes to 160, that should tell you what a performance machine this is"

we left

[Chezedik]

Yeah, my cousin had a 94 Camry (the performance machine that it was), and the speedo read 110, needless to say it was limited at 95, and downhill would only go 98. But it said it would do 110...

[TEKs240sx]

If you cut the green and white speed governor from the ECU, you can expect close to 160mph. Think about it! For those who actually have a KA24E (Like me) I can hit 115mph in 4th at about 5000rpms. I still have until 6700rpms before the rev limitor kicks in, and all of 5th gear. That's only 45mph faster you have to accomplish in about 1.3 gears. Most of my gears have about a 40mph threshold.

[OldmanPurdy]

Maybe it can go 160mph theoreticaly, but I think you will find that the car is completly unstable at around 135-140. There have been lots of post on this in the past and 135-140 is the general concensious, but maybe im wrong get a video camera and try it

[gtoboy87]

i no im gunna sound like an idiot...but wheres the ecu?

[Reno]

passenger side next to their right foot..... if they have one :P behing the plastic wall

[Chezedik]

In SOHC it may be grn/wht, but I it is grn/yllw on DOHC.

[naed240sx]

Yeah a lot of people think that the speedo goes to exactly whatever speed a certain car will hit. Not true. There is a positive correlation between top speed and range of the speedo, but nothing concrete.

[LasVegas240sx]

how about the top speed of an s13? I've taken mine to 110 on the freeway but I have the digi speedo on mine.

[BadMojo]

how about the top speed of an s13? I've taken mine to 110 on the freeway but I have the digi speedo on mine.

I've done the same, but stopped before I hit the governor. As for top speed, despite the gearing, I really, really, really doubt that a stock 240SX could hit 160mph. Just pure speculation, but I say "no way in hell".

[zippitta]

A completely stock 240 wont hit 160. It does not have the horsepower to push it that fast. Theoretically, it has the gear for it, and with enough power it might, but then you will have to factor in heat and wear.

[DjPantsSpecR]

yeah, wind resistence increases exponentially with speed, so the wind resistence is just too great.

it does remind me of the original BMW M5 from the eighties ad"the sensible 160mph family sedan"

[naed240sx]

A completely stock 240 wont hit 160. It does not have the horsepower to push it that fast. Theoretically, it has the gear for it, and with enough power it might, but then you will have to factor in heat and wear.

It probably does have the power to make it to 160, but that would only be if the person was running a 3.6 or 3.8 diff, and it would take forever to get there. Stock 240s are limited to 112 mph, by way of a 5.5k rev limit in 5th gear. My car will only hit around 105ish because I have a 4.4 diff.

[Chezedik]

I guess I would be inclined to agree with that, but it would be a b*tch. Also, if you boosted you might make the torque on the 4.08's to do it.

[gtoboy87]

theres more then one white an green wire

In SOHC it may be grn/wht, but I it is grn/yllw on DOHC.

[JimmyMethod]

The force to the pavement your engine is putting down has to be greater than the force of the wind pushing back for the car to accelerate. The gearing comes into play because it determines how much power you make at given speeds, however, the MAX speed you can attain, with perfect gearing, is going to be determined by the peak power of your engine, and the drag coeffient of the body.For the 240, S14 or S13, I'm going to guess somewhere around 130.My Saturn SC2 (a LITTLE less power, a bit more aero) could hit about 125.

[DjPantsSpecR]

exactly, i said that earlier and it was just ignored, and i wanted to say it again, but i just got lazy....

however, stock s13 will go more than 130, i think around 145 would be more reasonable, but thats assuming limitless track

[naed240sx]

I guess I would be inclined to agree with that, but it would be a b*tch. Also, if you boosted you might make the torque on the 4.08's to do it.

No, the reason I brought up final drive ratios, is because a 240 would be way above 7k by 160mph, with a stock diff, so whether the car was turbo or not, it would not matter. It would have to over-rev to reach that speed.

BTW guys, my friend hit 160mph in his 2000 VW Jetta vr6, and it was still pulling. That car is far less aerodynamic than a 240sx.

[DjPantsSpecR]

we're talking co-efficient of drag here, and what kinda pwoer does that vr6 have?

[naed240sx]

around 170hp/180trq. Its barely faster than my car to about 80 though, and Im rocking a nearly stock ka. CD? Yes, something that is more aerodynamic has a lower CD, so we are talking about the same thing.

All of this is speculation, but if the correct final drive was installed so that the car reached 6k rpms in 5th at 160, I think that it could be done. I think that it would take a really long amount of time however. My car still pulls hard at 110ish.

[alienwareboy51]

now i dont know y some of your cars are limited to 110 i have an 89 24sx fastback se manual transmission ive taken it to about 125 (my friend was driving next to me in a car with a higher spedometer) *** that 240's only go to 120 but hey back to the topic i know mine cant do 160 because of the **** shocks i have that leaked out but when i get my apexis in and a wing on to keep my rear end down ill try goin higher but the way it is now just isnt stable enough to go any faster that and i feel uncomfortable with my tires only being only rated for 120 but theyr great all season and winter tires i stand behind my goodyear tripple trats anyday "not for racing but great for daily"

[TrueSlide]

I was reading somewhere cant remeber where. Car and Driver(?) and theoritcally the 240 would only hit 130s.

[Fenvy]

If you cut the green and white speed governor from the ECU, you can expect close to 160mph. Think about it! For those who actually have a KA24E (Like me) I can hit 115mph in 4th at about 5000rpms. I still have until 6700rpms before the rev limitor kicks in, and all of 5th gear. That's only 45mph faster you have to accomplish in about 1.3 gears. Most of my gears have about a 40mph threshold.

you are kidding right? I don't even think my sr can hit 160. Above 130 is already scary enough for me, no way I am going beyond that.

yeah, wind resistence increases exponentially with speed, so the wind resistence is just too great.

it does remind me of the original BMW M5 from the eighties ad"the sensible 160mph family sedan"

bingo, air resistance is the key. It may be very easy to travel from 20mph to 80mph but from 80mph to 140mph is a lot harder, let alone 160mph

now i dont know y some of your cars are limited to 110 i have an 89 24sx fastback se manual transmission ive taken it to about 125 (my friend was driving next to me in a car with a higher spedometer) *** that 240's only go to 120 but hey back to the topic i know mine cant do 160 because of the **** shocks i have that leaked out but when i get my apexis in and a wing on to keep my rear end down ill try goin higher but the way it is now just isnt stable enough to go any faster that and i feel uncomfortable with my tires only being only rated for 120 but theyr great all season and winter tires i stand behind my goodyear tripple trats anyday "not for racing but great for daily"

limited or not, gauge cluster are not very accurate and is designed to be appear faster than you actually are going. Meaning if it says 100mph, you might be going only 90mph

Most of our 240sx, unless heavily modified, can't even pass 130mph. Stop relying on theories, stop relying on gauge clusters. Let's see some proof. Get it tested professionally.

[alienwareboy51]

i know well that many guages arnt the most arrurate things but mostly only off by about 5mph even then both of our cars were shgowing the same speed anyway either way the car it self is far too unstable at that speed seriously one bump and u could be upside down goin bald on the pavement alteast in mine with the sunroof dont recomend goin faster then the spedo goes unless its well tuned and has good downforce which will fu*k u on ur drag coefi only did it once and it was freaky and heeell but fun i did however make a cross state trip goin about 110 most of the way

[Chezedik]

If I haven't said it already, I have had mine to 135, but then the body goes nuts and starts shaking. It was getting wind underneath it, and with no spoiler, I decided to let off the gas. I expect I was pretty near the threshold. I could have had a higher top speed if I had the spoiler, but that then affects acceleration. But neither here nor there, they look better with my wangan (I know, it's a little rice).

[frosti108]

in my friends 1989 ka24e with nothing but a cold air and a beat *** air filter, we hit about 119mph.

cant wait to see what my car will do

[nismo96ka]

my 96 altima SE with CAI,gutted precat, custom catback will bury the 120mph speedometer. had it up to 135mph, buddy behind be was clocking me on his speedo.

[0wn3r]

you see the tripometer (in an S14 kouki gauge) ? That's what I've gotten it to. As, of course, you've probably seen in the other thread where i posted the picture..