Guys...I dont kow either something is wrong with ME or my car or the track we are runing at....

I have about 620HP at the crank and yet my best 1/4 times is 12.4-12.5...Trap speeds around 120 mph...



Last time at the track my best time was 12.6 and LPE C6 ZO6 616 HP did 11.8...

I put pressure down and do burn outs, not very long but still do...ESP does not feels cutting power but flashing all the way throught 1st gear...

My temps dont go higher then 100C if looking a gauge, infact always below and the car pulls hard but the times are not very good

IS my ECU pulls timing on ME or something else is wrong, I launch at 1000 RPMs...in comfort mode... tranny in S...

may something is wrong with our equipment...but there are 600 HP Skylines and 500 Evos runing mid-high 11s...and LPE Z06 does 1/4 in 11.8 with stock tyres but 345 wide...

 

Are you running on drag radials?

 

You ever snag an OBD scanner.

This is the one a lot of us use. Not the best on the market, but it gets the job done. Takes about 1 sec shapshots of your motor info.

Here if you need it. First thing I would look for are thost IAT's at high r's.

Here is the link...you would need ATU (connects to USB Laptop)

Keep us posted.

 

get some sticky tires and watch those times plummet

 

Wheres that CLS63 crew with their correction factors when you need them?

Its probably your track. If those other cars are getting numbers like that then its gotta be the track.

 

your trap speeds would appear to indicate that you're not losing power during the run but i still would suggest ANYONE into modding these things to spend the $200 on a datalogger...it's just crazy not to.

with a proper track and good launch you shouldn't see the esp light at all so i'm leaning toward track conditions.

 

He is in Russia and not running on a NHRA sanctioned track LOL...

I could do a manual calc if the driver provide me with

Atmospheric Conditions at the time of the run.

I would be happy to do it as it would help the driver determine whether it is the weather...........Hey whats that called?

 

If you're launching at 1000 rpm's it sounds like you're "power braking." Don't do that. The computer doesn't like that. Just hit it when the light turns green. That's just a small correction to make and doesn't fully explain your times. With your mods you should be in the very low 12's to high 11's I would think.

 

Traps around 120 would indicate that you have the power, but are not getting it to the ground. Whether that's you or the track or both is undetermined. For example, in my stock '03 55 on stock tires, I ran a 12.31. BUT I only trapped 114. That is pretty consistent with other results on Dragtimes. That run did have a 60' of 1.87 which is pretty good. I suspect your 60' times will be over 2.0 which means you are spinning or slipping. Slap a set of DR's on and launch ESP on, no brake tourqe and see if the results change.

 

I think u have the same problem as me, that is getting power down to achieve good 60ft times. Your trap speed is very good. Play with tyres/tyre pressure and launch technique. And you could buy a Gtech meter or something like that to help you.

 

VERY nice numbers!~ I think you would run much quicker on a track in the States.

 

Yes...thank you...Our track is just regular air field...

The weather conditions where +15-18C, it was 2 clock at night about 500-800 feet above sea-level...I did 2 sec burnout...

 

Nope Yoko Advan Sport 103 285/30 on 19's...

 

Everyone has diff techniques...I think without pre-load 1000 Rpms there is mos ESp interaction... but not sure...thanks...

Will need to try this...I will try diff techniques and let you know my results...

I just scared that by the time I finish this my new tyres will be bold again....

So what should I try:

1. Lanuch with out pre-load or with ???

2. Put pressure down or not...if down to which level ???

3. Do burn out or not ??? If yes how many seconds ???

4. Anything else I've missed

 

I dont know if I can get one here...

 

[QUOTE=E55 RUSS;2278774ESP does not feels cutting power but flashing all the way throught 1st gear...[/QUOTE]

Reduce or stop the flashing and you will run 11's.... don't preload...

 

OK thanks...but I am not sure how to my ESP not to flash

May its my ECU cutting timing on ME...or I am too rich on top...


https://mbworld.org/forums/showthrea...t=dyno+results

I need to find out exactly my trap speeds...

Going to track today in the evening to find out my results and practice...


Will let you know later...Will put camera to film my speedo, so you see what happens...

 

Wait, you run on an airstrip (assuming there is no track prep and/or VHT spray) on street tires and you expect to run 11's? Your times are very good for what they are. Here in the US the tracks are prepped and sprayed with a sticky substance called VHT which makes the surface MUCH different than a airstrip!

 

How accurate are the times / trap speeds ?

Looking at speedo aint going to be accurate at all ...

 

Do not do a burnout. You are wasting tires and asking for a blister. DRs need them to get into the sticky zone, but Z tires don't.

 

If you're on a real street tire, lower the pressure a few PSI (> 25psi usually) and do a quick spin to clean them/heat them. Anything else is a waste. You won't "blister" the tire, but you can actually overheat them and cause them to be even more slippery.

Launch from idle. When you launch, just squeeze the throttle like you're firing off a round. Smooth and steady until you reach the floor.

The 19s are likely what's killing you. Get some 17s or 18s out back with a sticky tire and you'll be cleaning up at the drags.

 

our cars are heavy enough that we DON'T need to lower tire pressures to get a proper contact patch. do a good 2-3 second burnout to clean and lightly heat tires then launch off idle. keep in mind track prep is critical with street tires so if it's nonexistant at your airstrip, street tires just aren't going to do well...especially at the low ambient temps you've been racing in.

btw, 19" wheels with street tires don't kill 60ft times and i have the time slips to prove it.

 

Hello everybody...Thanks for you comments, many views and many diff opinions...

Well I just came from Russian 1/4 track...and they use Russian equimpment ...If funny but US equipment shows simular results on same cars...

Track is never prepared...Everythign the weather brings, stays on the track... The surface OK but not cleaned, like I showed you on the picture bu or put VHT spray LOL... They say they wanna bring it soon...So basically it like racing in 1/4 on regualar road...

Weather was around +20C...

Did 6 runs with breaks in btw and tested diff set up...Trap speeds is constant at 186.5 km which I recone about 115-116 mph...

Worst times are without burnout and with stock tyre pressures and no pre-load...12.9 without reaction times...ESP is cutting too much power of the line...I press the throtle and the ESP cuts power immediately and then I accelerate with ESP flashing all the way to 40-45mph...

Stock tyre pressure and burnout still didnt helped a lot...did 12.7-12.8+ those are claer times without reaction...

Best times with little burnout and pressure around 22-25, little pre-load at 900-1000...12.5-12.6...ESP is still flashing in 1st, but does catch that much power off the line, tyres are squiaking, and I feel back end wonders around a bit...

I think I need to do some G-tec testing, so you guys can tell ME if my car alright or NOT...

I will post a vid of my speedo in 1st run tommorow...I dont know I am not very happy with the Results Russian dragster beat ME...by 1-2 cars...

 

if you really want answers instead of more speculation, spend your money on a datalogger instead of wasting it on a gtech! the autoenginuity datalogger is cheaper than the gtech and besides providing USEFUL information it even comes with software to do everything a gtech does.

 

No my freind has a g-tech, so I can use his to do some testing...

What testing should I do ???