It's simply a hex way to represent positive and negative number in a "computing" way.
We used similar way in my old time university on VAX PDP-11 machines, loooooot of years ago when coding mathematical algoritm in C+ routines.

 

Anyone with VR (HR) model tried the mod ?

Good feelings ?

 

Ok, after some other usage i can say that smoothing this curve seems to have a positive effect.
My 350Z HR (as all others these cars, i see a lot of discussions in forums and also spoke with friend in Italy) has always suffered (stock or mapped) of a small "shuttering&exitations" at 2500rpm, worst with cold engine and external medium/hot temperatures. I see that folks tried a lot of things to cure this, from changing motor oil to other strange way. Never found a real solution.
Well, with smoothed curve the problem seems to be disappared !

I was thinking was a only lucky but yesterday i turn on the car with activated "normal" map just to try and problem was there ! I swtiched on smoothed map at it was no more. I repaet at exactly the same working condition.
Could be lucky again ?!?!

So i report this if someone other would like to try...

 

You guys did a great job of building on the throttle mapping work by the370z crowd.

I caught your thread and dropped into my current tune to realize I've been running the stock throttle mapping the whole time! I could have sworn there used to be a toggle button for an Uprev throttle map (maybe the newest rom editor ditched that for the throttle maps and put everything back to the stock map?).

Anyways my stock throttle map is identical to karletto66 and just revised my MAP #2 to use the Excel calculated values for 50% = 2200 and 100% 3700.

When I leave work I'll flash it and see how she feels.

 

OP: I posted my experienced using wstar 370 forum smooth throttle. Post # 218. I also posted a recent run today.

http://www.the370z.com/tuning/43384-...-uprev-15.html

I have a VQ35HR 2008 Infiniti EX35 AWD 5 speed Tranny. (A/T)

So did you guys tweaked wstar Throttle map more? If it is better, pls. Post hex code. I will try to copy paste it to my ETC Uprev tuner ROM editor. Thanks a bunch!

 

Not BETTER because is the same way, simply i made some testing and another friend (very smart) made Excell sheet to make calculation and hex to paste in romeditor.
Simply and fast, to make different tries.
You can find all up.
Please report your feelings if you try different numbers, for now i drived only "original-2200-3700" interpolation curve but want to change to "original-2300-3700" (not much difference for sure)
My test is good, i feel the car soft&reactive, no strange behaviours or jerking.
But need to make more km to understand better.

 

I've been running an original-2300-3800 map (pretty much right off Str8dum1's excel sheet) on my DE for a couple weeks now and it feels quite a lot better than even the uprev tuned map. My wife even commented on it while she was driving. Downshifts seem a bit crisper as well.

I leave a standard throttle map on map 5 for slicker conditions though so as not to upset the VDC, but I don't drive it in the snow anymore like I used to when we lived in Minnesota..

 

Thanks for the info. If you read my last post on that forum dated today, I did log some runs using wstar throttle map and another forum member there who said his map is better. So I compared both.
I only did 0-45 MPH log- 4 runs comparing the 2 Maps. (Throttle). All my logs were set to VDC : OFF .

Guys, is it possible to log some runs like I did 0-45MPH ( this is just 1st gear towrds second gear) around close to 7.5K RPM. I just want to see how mines compare to 350Z? VDC OFF, Manual mode. Though I logged my 0-45 on a snow tires, but it is AWD so i do not think it matters.
My mode is just a drop in Afe Pro dry S filters and a G37 coupe muffler.

Next time I will try 0-60.

 

Ive put about 40 miles on the car, with the 2200,3700 map, and can say spirited driving, heel-toe downshifting, and overall throttle input seems better (tighter control ).

Ive been hammering the rev limiter and MAF table in this time so I've got a pretty good about pf varied throttle scenarios without any issues.

 

All AUTOMATIC cars ?
I think that this map is lot more relevant in these that in manual ...

Possible interacts with gear logic ?!?!

In my manual i feel little difference (but i'm really "difficul"t driver, i feel the Z going slow after some days of usage, next car will be an F35 maybe...)

 

Manual here

 

Do you feel GOOD difference ?
I used the car today and seems good & reactive, but the Z is also original quite good...

So difficult to feel real difference in normal street drive...

 

For me the earlier ramp in throttle vs pedal makes starting off easier as well as more reactive free reving when heel toe downshifting (i.e. less right foot ankle roll to blip the throttle).

When I switch maps on the fly it's pretty noticeable (all tables the same except elec throttle).

 

Pmpm

 

Follow up: Still my crossover car is pretty slow (too heavy). From dead stop it only managed to run 6.30 sec 0-60 MPH ON DS mode with power braking. Got a better 0-45 MPH in 4.02 secs. This was using Wstar 2300 ETC MAP. (This was real world ran on local street using Cipher logging)

- Did not try my AWGD8 -Modified Wstar map that I created.

 

Rich, I put the table numbers from your spreadsheet into my map. Great job!!! I like the throttle response way better than stock.

 

Ok, another positive feedback so...

 

Thank you for starting this thread and sharing this information!!!

Before yesterday, my throttle felt, as some say, "lazy." The new throttle curve makes the car "feel" like it has more low end torque.

Now, I just need to get used to the new map. Coming to work this morning my rear tires broke loose when I had not intended for them to do so, and I was not anywhere near full throttle.

 

good deal!!

I've loaded the settings but havent driven much with them to compare. Glad to hear you got your car finally up and going after all these decades

 

Yes, it took a long time for Roger to finish it. We are almost there.

It turns out the .64 A/R on the turbine housings of my GT3071R turbos, and my Greddy exhaust system, are a little restrictive for the combination of the 4.0L motor and C8 cams. At 16 or 17 psi of boost I had 640 ft. lbs. of torque by 4200 rpm, but then it drops off. With the mid-pipe on the exhaust removed we were able to get over 600 whp (614 if I remember correctly, and still with conservative timing), but still, I want the torque to hold longer.

So, very soon, we will be changing the turbine housings. The .86 A/R version of the turbo has a different turbine, so that housing will not work. It looks like we will be having GT28 .86 A/R housings machined out to fit my turbines.

Also, another issue popped up. I had both the inside and outside of the turbine housings ceramic coated, but maybe I should not have done so on the insides. When the turbos heat up on the dyno after a few full boost runs, the boost ramp up all of a sudden gets delayed. We think the turbine blades in at least one of the turbos is scraping against the ceramic coating. We won't know for sure until we drop the turbos and inspect them.

The weird thing with the exhaust is that it worked perfectly fine with my 3.5 L motor, C2 cams and Greddy 18G TT kit. They easily made 609 whp. But the fluid dynamics are a lot different with the new setup. So, we have the parts to put together a custom 3" exhaust system. The Greddy exhaust is 2.77", but the resonators and mufflers appear to drop down to 2.5", which appears to be too restrictive with the new setup.