Top speed?

Anybody know definitely where the top speed of a 3.4 automatic Tacoma is? I run automatic trans with O/D off, a 27" tire, and I'm guessing a 4.10 rear end. I was hitting what appeared to be fuel cut 30 feet before the finish line in 1000' drag strip at 90mph. This is a big problem. Maybe I went too small a diameter tire.

The speedometer is off by roughly 10% (fast) therefore the odb speed would have been reading too fast also. Not sure what the speedometer said as I was hitting fuel cut but it would have to been close to 100.

Any way to disable this fuel cut, if that's what it is?

 

What strip is 1000 ft and not 1/8 or 1/4 mile..?

Would imagine fuel shutoff is an ECU feature, so maybe start there and see if there is a tuning option.

 

you should be getting more then 90 I would think

 

My onboard speedometer reads faster due to my smaller tires. 90 is what I trapped. My factory speeo would have read closer to 100.

Centerville dragway is 1000'. I believe it's the oldest 1000' strip in the country. Also 1000' is what NHRA runs now instead of the 1/4.

FWIW I run 8.9 at 78 in the 1/8th

 

You can use a URD speed un-limiter. As it happens i happen to have 2 of these available. 1 new and 1 used. New $100 + ship and the used one $80 + ship. let me know if you want one. They retail for $149. + ship From Urd. I can hit 87 mph in 3rd running 37's and 4:88's I had my stock tacoma with 285/70/R17 up to 125 mph! The speed unlimiter is a frequency clamp. It tricks the ecm to think its under the speed limit so you can go as fast as you have motor and tire speed rating for! The unlimiter is the best option for also being able still use the speedometer when it working. There is another more complicated way of doing it and it involves interrupting the speedometer signal wire with a switch but side effect is no working dash speedo when switched on.

 

I may be completely off here, but aren't many of the ECU programs run based off of your speedometer? Meaning that even if you were only going 90, but your speedo said 100, then the ECU would think you were going 100? If that's the case you'd just have to correct the speedometer.

 

That's right. My smaller tires are causing the speedo thus the ecu to think I'm really ballin out lol.

I'm currently trying to find out if the ecu uses the speed signal input in open loop. My feeling is that it does not.