FI with continous high speed driving 130MPH+

elperuano

6th gear at 80 is probably around 3k rpm or more.. That's not revving high at all. What I personally would do is go wot from 4th n max out at 6th. That's how I hit 150 all the time. Shifting gears around 7k.
What Lafitte is doin is starting his run from 80 on 6th gear which is prolly little more than 3k rpm. Now to push it from top of 5th into 6th is how I would do it, but rolling start at 80 on 6th... Personally I'd use another gear. To each his own

conmam

Yeah, I think so. At 3000 rpm it is not optimum for the engine torque output. That will somehow lug the motor a bit even with Twin Turbo set up. Best to go to 5th , then 6th. If you want ultimate pick up, then from 4th to 6th ...

Mr.Squeeze

Sounds like you nee 3.3 final drive, I start in 3 gear at 80 and end up in 5 gear by 150.

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Driven Motorsports Single Turbo 7675 T4 1.32 A/R 995WHP 780TQ

conmam

But then your speedometer reading will be way off because factory speed sensor was made for 3.629 final drive ratio. How do we correct this issue ?

Mr.Squeeze

Not sure how to correct the issue people have been switching final drives on Z's for years. At my power level I need it the stock gears are just to short for my power level. My speedometer being of a little is something I am not worried about it can be thrown off just by changing tires.

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Driven Motorsports Single Turbo 7675 T4 1.32 A/R 995WHP 780TQ

conmam

How much whp and wtq are you having on your Z ?

Mr.Squeeze

High boost 647whp 613TQ link to my thread is in my Sig

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Driven Motorsports Single Turbo 7675 T4 1.32 A/R 995WHP 780TQ

conmam

Yeah. That I see . Pretty close to 700 flywheel hp. Very strong and pretty killer torque you got there. Looks like a 3.3 final drive can get you up solid over 200 mph if your aerodynamics allow you to.

By the way, how is the driveability for your high power TT set up ? Hopefully it should be as good as factory turbo on a GTR ? I mean no bogging, erratic idling issues , hard starting issues at all temperature range ?

roy'sz

You have to change the values on the digital speed counters. Since the car is trying to read 3.629 you have to change that value to 3.3XX, also if you have changed tire sizes then you need to update that as well. I thought that this setting came with the handheld or can be done when you uprev?

conmam

Unfortunately, Uprev does not deal with BCM commands. They only deal with ECU commands. Besides that, they restrict mostly to performance parameters. Uprev cannot even do do everything that Consult III can do, unfortunately. However, Uprev is great for all your performance needs pretty much.