Posted: Nov 25 2004 at 1:25am | IP Logged

KL99SEA wrote: Use a handheld gps.   My GPS shows 61.5mph when I have the cruise set exactly at 60 on my speedo.  That seems to be common on Titans.

GPS doesn't lie!

Posted: Nov 25 2004 at 10:30am | IP Logged

KL99SEA wrote: Considering all Titans are limited by the ECU to 115mph.....because of tire ratings...I would say you all have some speedo innaccuracy or optimistic eyes.  The reason we have to dyno in 3rd gear is in 4th the limiter hits at 115mph and you cant get to dyno to redline.

Well, you really don't know if all of them have a speed limiter.  Some Nissans didn't and some did in the model line up.  Depends on the model you get.  A SE usually does not have a speed limiter that is set low like the rest.  It is usually much higher.  XE and LEs now do usually have a lower one.

I hit 115 in mine and it was still pulling.

Posted: Nov 25 2004 at 10:34am | IP Logged

You are not correct. The ECU does read the engine speed.  I have had a computer hooked up to the ECU reading the speed of the vehicle and all the other information as well.  Nissans READ the ECU for SPEED and determine when you reach that MAX speed, it will cut the fuel.

Mitch wrote: KL99SEA wrote: Sorry but power at a lower speed has NOTHING to do with the ECU limiting speed.  I have seen a dyno in 4th that abruptly stopped at 115.  You could fool it with larger tires (taller) but the fun is stopped at 115 MPH on our trucks,  You may think your going faster and the speedo may be off a few mph but when the ECU reads 115 thats when the fun stops.  I believe this is because our tires are S rated...114mph max sustained speed. I'm not sure but isn't 4th closer to a 1:1 than 3rd?  I remember a few guys on TitanTalk saying 4th would be the betterl gear if not for the 115mph limiter. The ECU does not read the speedo and the ECU does not have any type speedometer inside it. It uses engine RPM relative to gear selection. They would have to dyno in 3rd because you could never hit max rpm in 4th or 5th. I ... 3.83 ... 7.1 ... 43 mph (6100 rpm) II ... 2.37 ... 11.4 ... 70 mph (6100 rpm) III ... 1.52 ... 17.8 ... 109 mph (6100 rpm) IV ... 1.00 ... 27.0 ... 114 mph (4200 rpm) V ... 0.83 ... 32.4 ... 114 mph (3500 rpm) Im interested in what the GPS says.

__________________
2004 Titan CC, SE, 4x2, Smoked

Posted: Nov 25 2004 at 11:10pm | IP Logged

You hacked the ECU code? Right, it takes a army of techs at the performance chip companies months to do that. Sorry not buying it.

Titan_TX wrote: You are not correct. The ECU does read the engine speed.  I have had a computer hooked up to the ECU reading the speed of the vehicle and all the other information as well.  Nissans READ the ECU for SPEED and determine when you reach that MAX speed, it will cut the fuel.   Mitch wrote: KL99SEA wrote: Sorry but power at a lower speed has NOTHING to do with the ECU limiting speed.  I have seen a dyno in 4th that abruptly stopped at 115.  You could fool it with larger tires (taller) but the fun is stopped at 115 MPH on our trucks,  You may think your going faster and the speedo may be off a few mph but when the ECU reads 115 thats when the fun stops.  I believe this is because our tires are S rated...114mph max sustained speed. I'm not sure but isn't 4th closer to a 1:1 than 3rd?  I remember a few guys on TitanTalk saying 4th would be the betterl gear if not for the 115mph limiter. The ECU does not read the speedo and the ECU does not have any type speedometer inside it. It uses engine RPM relative to gear selection. They would have to dyno in 3rd because you could never hit max rpm in 4th or 5th. I ... 3.83 ... 7.1 ... 43 mph (6100 rpm) II ... 2.37 ... 11.4 ... 70 mph (6100 rpm) III ... 1.52 ... 17.8 ... 109 mph (6100 rpm) IV ... 1.00 ... 27.0 ... 114 mph (4200 rpm) V ... 0.83 ... 32.4 ... 114 mph (3500 rpm) Im interested in what the GPS says.

__________________
Mitch
04 Titan LE crew cab 4x4
Tow and Off road package
1960 Resto Custom Bug (BOOSTED) 0-60 in 4.0

Posted: Dec 04 2004 at 5:14am | IP Logged

I have 35" tires on mine, got the speedo to register 115 and it didnt cut off, Did it once cause we were curious if it would cut off, and it wasnt.

Posted: Dec 23 2004 at 4:18pm | IP Logged

Sure it does. I use some of the most sophisticated GPS equipment made in my job,measures ground speed,air speed(speed relative to air that you are traveling in),wind speed and direction, air temp ect.... and It is not that accurate when it comes to speed. I would beleive my  stock speedo over GPS.

Posted: Dec 25 2004 at 1:39am | IP Logged

WHo started this silly thread anyway! Your highest speed in a full size truck.... Dont worry about it, who cares!

JB