12.942 @ 106.80 Pass Tonight with room to improve in my 6M
 

I Went to the Englishtown RaceWay Park tonight. like I have said in other threads I was shooting for a 12 second pass with my manual 370z Base No Sport package so no VLSD 370z and got it.

I used 26x10.5 M/T ET Streets and I must say these are NOT the tires I will use again. I am not familiar with slicks or the "sway" they produce without skinnes. These tires are something to get used to. I did, to an extent, but with no doubt about it I was concentrating more on the "sway" than driving so I definatly did not drive as well as I could of. I ran the psi at 18 the first pass and Let off 3 different times and still pulled a 13.2 @ 101 ... Was easily my best launch too, which was weird because it was the first pass I ever did with the slicks. I let off a few times because I felt the " sway " ( strange side to side feeling the first run but got used to it when I realized its not all that intrusive, just noticable. Def something most have never felt going 70+ mph ) ...

I upped the psi to 21 and the sway was def tamed a good bit, and I was able to push the car pretty good. When I spoke to others they said the sway is a known thing and you get skinnies for that, etc. Most just advised me to get the M/T ET street radials a drag radial instead of the taller side walled ET Steet slick I have. A ET street radial a nice and light 17/18 x 10 would be perfect to keep the cars feel the most OEM while still getting traction.

But with that aside my first run was 13.2 @ 101 ... second 13.0x @ 106 ....

and third 12.954@106.80

http://www.the370z.com/members/chuck...5-5-100001.jpg



The 60 foot is decent, and keep in mind this is on an open diff , and I did not pull the ABS fuse so I was not able to do stand stills. I simply went around the water with my M/T ET Streets and did a rolling burnout or 2. Def not ideal to heat the rubber, I need to look into getting the ABS disabled so I can at least light them up without abs or whatever it is that cuts the fuel and dis-allows a stand still burnout.

But even with being a bit nervous about the tire situation they certainly hooked way better than my stock rubber did. A few weeks back, my first 1/4 track visit I couldn't do better than a 13.5. With 60's of 2.2 + .

The ET Streets without heating them up got me a 1.945, But a 60 of 1.94 is nothing to be proud of with these tires. I could of done better. I'm hoping I can get a nice setup of Drag Radials for next time and sell these wheels off to someone who will use them properly, because I wouldnt advise to use them with stock rubber up front unless you are used to the experience. A turbo 350z was there with the same tires with stock rubber up front too and he knew what he was doing , so its not like its soooo scary, but a wierd feeling with the slicks causing the car feel as if its floating almost.

I will see better numbers with this car the way it is with just a new tire setup. I was always driving nervous and I think shifting too early and slower than desired because of this sway feeling. That is my guess why my trap is , almost, much lower than I expected.

But all together My 370z certainly did not disappoint tonight, it ran better times a bunch of srt 8's , I lined up and beat a Z4M that was Dinan'ed out. The guy was really cool, we bs'ed a little bit, he couldn't hook at all, but I have our race and slip I will post and you will see, his car never starts to catch up. But he needed new rubber. I drooled over this car, ill post the pics.

I raced and beat a New SS Camaro ( 13.9 - 12.9 ), BMW z4m very tastefully modded (13.7-13.2), a near stock 09 evo mr by less than one tenth ( 13.155 - 13.187 ! great race )

and got whooped by a c5 with bolt ons + 100 shot... that was my first run and at 1/8 of mile i was one tenth behind him but this is the run where I let off a few times because I felt the tires acting up. ( 12.135 - 13.206 )

Im not sure as to what the DA really means but I Used a DA Calculator from dragtimes.com that uses the weather from the time of your run in a formula with the tracks elevation, etc. for DA and it was Density Altitude: 1046 feet
Relative Density: 96.97 %


I played around with launching RPMS and my best launch was produced when i was steady on 3500 RPMS after one of my better little burnouts, It hooked pretty good with just a little spin. After the 12.9 I did one pass and dumped higher and I rode the clutch wrong or whatever but it was a 2.05 60 and netted a 13.2, I was hoping for a 12.8x that last passed but was still thrilled about the 12.94 in the Manual which needed this to shed some light on the 6M doing the job of moving this car down the track just fine.


here is a picture of my car waiting and the z4m. It had wheels, monster brembos, exhaust, suspension work, dinan badges. it was nice in person for sure. He was frustrated with him times though, his best was a 13.3 with a 2.2 60 foot.

http://www.the370z.com/members/chuck...4574-photo.jpg

http://www.the370z.com/members/chuck...576-photo7.jpg

great times. noticed you posted in the 350 forum.....waiting to see how all the 350 nut-huggers take it :stirthepot:

congrats on the 12.9 and it be nice to see similar, if not better times on a drag radial setup, assuming ur keeping the radials up front.

and that z4m...wow

Yes I want to keep oem rubber up front and go with 275/40/17 M/T Street Drag Radials... Should keep the car much more stable and will allow me to rev higher in the gears up top, I think I shifted early out of fear most the time. It was def wierd with the street radial (slicks)


the z4m was much nicer in person than the pictures too

http://www.the370z.com/members/chuck...577-photo2.jpg

I resemble that comment ;).....but seriously....glad to see you got your 12!!! Need to find out where that mph is though......should be in the 111 area without issue.

For those of you that launch off the line out of the box...What do you rev to? I'm kinda a newbie and will be taking my Z up to the strip once the break in period is over...Just don't know what an ideal rpm would be to launch off from...Everything thus far on the car is stock to include the 19" Rays wheels and the clutch

Start at 2500 feathering off the clutch and work your way up until you find the happy median b/w bogging off the line and spin....it is a narrow window typically. It is also highly variable as different tracks and weather will lead to differing levels of traction.

what he said above is spot on for stock rubber....

I'm telling ya its low because I was not bringing it to red line up 2nd and 3rd and also was taking extra time to shift than I would all because of nerves created by these demon tires I have. Just let some time go by and I will be back with a better time and mph.

this was also only my 2nd time to the track in about 6 years time so I am still getting used to the car and deciding on the best techniques.

great time! Way to stick it to the 350 owners haha.

Thanks...Great info

Did you change your front tires ? you can not run radial and non radial tire's on your car.
I have the same slicks and skinneys on my 350, it drives straight as an arrow.
If you mix them you are begging for trouble.
Nice times.

Yea I mixed them and was begging for trouble, but never again. LOL

Im contemplating just ordering the MT Street Drag Radial in the same size as these et streets or getting a set of 18x10 like you did and go with the 18s...

Are you planning on doing a burnout Z ? If so, by pulling abs fuse or line lock or something else ?

12.9@106 is really good at DA-1046ft. its probably why your trap was only 106mph instead of 109-110ish. if you was further south down in my area you would be a 12.7 to 12.8 second car. really good times.

Perhaps I am reading you post incorrectly, but you have it backwards....higher temps +higher humidity (the south)=slower (higher DA). It's (+)1050'.....which isn't terrible. On a cold late fall/early winter day the DA can be 1500 to even 2000' lower than that, but at the same time in the dead of summer it can get to over 2500' on bad days.