Superchips for t4r or something similar

[MayorBloom]

Hey all,

I did search and read a ton but am still confused and a bit lost.

Way back in 2005 I had a Grand Cherokee (I Know :rockthrow, I did a lift and modded it pretty well. I was running a custom 4" lift on 33's and could not stand my speedo being off and I found this VERY, VERY simple ODBII thing called superchips Flash Paq. It was a stand alone unit that could be updated from them via usb.

It was very simple and let you change some programming, like changing the tire size, clearing/reading error codes, change the blinker to blink 3 times by slightly pressing on the stick, etc. I was pretty moron proof.

I have seen several things like this on this sight, but they all seem to be plugging a laptop into the ODB. I think I can handle that but would prefer something made for dummies. At the time it was under $250 now they seem to be around $450 and do not make it for Toyota.

Is there an idiot proof ODB flash that will let me change the tire size so my speedo reads correctly. I am planning to switch up to 285's and this actually may influence my decision.

I have checked my speedo with 265's and I am reading 1-2 mph higher than actual speed. So if there isn't something this simple out there I just may go 275's.

 

[Swarty]

Hypertech?

Hey all,

Is there an idiot proof ODB flash that will let me change the tire size so my speedo reads correctly. I am planning to switch up to 285's and this actually may influence my decision.

Not sure if anyone here has tried this since the speedo difference is only like 5% but hyper tech makes one for the FJcruiser which I believe uses the same speedo system.
hypertech

report back whether it works!

 

[BlackWorksInc]

You can wire in a Speedhealer, it's about $100 on Amazon for a universal kit and very easy to install. I use it on my 4th gen to correct the 14.5% difference in speed my 35's contribute.

But I wouldn't quibble over 1~2mph as that's fairly common and allowed in the industry.

 

[MayorBloom]

But I wouldn't quibble over 1~2mph as that's fairly common and allowed in the industry.

I am currently 1-2 mph off running 265's, I plan on going to 285's. My rough math is 4% difference, which is really only 3-4 mph on freeway. My concern is more for speeding tickets. I do live by the "8 you're great, 9 you're mine rule"

that is when being off just a bit is trouble..

 

[wfo9]

Most people have found speed is overstated from the factory. Hook up a GPS and 285s and you will pretty much see an exact match on speed.

And there are not any programmers for modern Toyotas. It is 100% locked down... even the dealers have no way to account for tire size changes.... Really sucks.

 

[1engineer]

I

I am currently 1-2 mph off running 265's, I plan on going to 285's. My rough math is 4% difference, which is really only 3-4 mph on freeway. My concern is more for speeding tickets. I do live by the "8 you're great, 9 you're mine rule"

that is when being off just a bit is trouble..

Rough math is like using your thumb to determine a sight line. 285's will be about 3.4% off. I addition your speedometer is off up to 2.5% from the factory which is within tolerance according to SAE. in addition to that you will change as tires wear or you go around curves. If you can't stand having your speedometer off by a few mph then I suggest you tape up your dash and use gps lol.

 

[littlezavasaurus]

heres a related question, do you guys who have bigger tires just do the math for the odometer too? in regards to oil changes and other maintenance procedures.

 

[MayorBloom]

wFo9, a big thanks....that is what I needed to know.