Sadly...Mach1s run low 13s. Damn you Ford. Wait till the Fbody is gone and then let the cat outta the bag.

 

This may not be the case with a factory car, but remember alot of pro cars drop serious MPH the better they hook. Do most of these pulling ~100 mph traps have worse 60's? it could definitly explain why your trap speed is lower, since your 60' is quite good. One thing you SHOULDNT change is your burnout (dont heat the tires up, not if they're street rubber, they'll only get greasy) and launch, you're doing it right there, maybe the tune of your car is off compared to tohers? your shifting? or maybe most of those you hear claiming ~100 MPH traps are just BSing you and it's not as common as some think.

 

Well I usually trap 100-100.8+ on my average runs of 14.1-14.25 with 2.11-2.25 60's - But on my best run which was 13.9@99.5 (75% Humidity, 62 degrees) with a 2.047 60' so a good 60' does lower traps a bit..

But I also have a run with a 60' close to his, a 2.11, and that resulted in my highest trap speed run of 14.1@100.86 so who knows..

The only thing I realize that seems consistant is on humid nights the last 1/8 gains let lower.. One night at 6PM I was trapping 100.5ish and my friend in his car was trapping 94ish, by 9PM fog was rolling in (later that night I checked the hourly weather and at 6PM humidity was 45% and at 9PM was 80%!) and I was having trouble breaking 99.5 and my friend was down to 92ish.. The thing is that my first 1/8's were consistant all night but I was losing 1-1.5Mph in the 2nd 1/8.. For example I did an 1/8 at 9.0@79.93 and trapped 99.5 but earlier ran a 1/8 at 9.1@79.1 and trapped 100.8..

 

Try a different track. Also let the car cool down all the way before you run it. See if that also makes a difference.

I had a Supercharged Prelude and the first time I ran it at the track it went 14.5@98. That is a higher time than expected. Then I let it cool down between runs and on the next run it dropped into the lower 14's and I was trapping 100+mph.

But I happen to think your problem is just in the track computer. Your times are good so I wouldn't worry.

 

ok -- yeah, like i said -- im gonna head over to Etown when i get like7-8000 miles on the car -- with my honda, i always pulled at least 1/10 of a second faster there---, with about 1.5 faster traps-- so well see if the Z performs in the same manner there!

 

Shift points matter for traps. My guess, you are shifting too high and not getting enough of the oppurtunity to ring out 4th gear at the end of the track. Shift a little earlier.

What rpm's were you shifting at? Redline?

 

yeah -- im shifting at redline -- as far as i have heard on this site its the best place to shift at --- should i shift outa 3rd a little lower --- what does everyone think?????

 

Hi there
Just to confirm so you actually did a 13.9 on the z stock. And at what rpm did you launch the car? I did a 14.62 with 12 run but with 35psi on the front and rear tyres and totally stock. Can you give me some tips.

 

what rmp's are you launching at?

 

well let me just say, that as a representative from Aus, these high 13 second passes r insane (even ur 14 flat). The quickest ne of the mags have gone with our Aus spec cars is a 14.3.

This is attributed to two reasons. Lack of familiarity with the car in the hands of the journos, and our Z ECU's r programmed with lower timing to allow for poorer grade petrol Nissan Aus claim 206kw, 276hp.

 

could have something to do with the difrent climates also

 

92hatcattack, unfortunately not.

The octane rating of petrol in Aus is lower than that available in US, and far lower than that available in Japan. The Aus Z's r configured to run on 95 RON. We have 98RON, but its not available throughout Aus, hence no car is confugured for 98 RON only.

 

ewww -- i guess that kinda sucks! -- what the hell is a RON???? -- how does that compare to us octance>??

 

i know it sucks!! It also means we miss out on alot of hot cars from Japan, including the 178kw Integra Type R (ours is 145kw), and the full monty STi Rex's. Our petrol issues means car manufacturers have to reprogram, and sometimes offer completely different engines for our market. And given our market is so small, they often dont bother.

Im gonna have an educated guess, remembering something i read a while ago, but 92 octane = 98 RON......i think!!!

 

damn --- sucks -- i know in california they only get 91 octane! -- but here in jersey -- he have the luxaries of 93-94

 

I lauched the car at 5500 got minimal wheelspin and 1/4 tank petrol but still 14.62 was my fastest timing.

 

I went to the track last night and couldn't trap higher than 97 either. All 4 runs had the same mph. I ran 14.7, 14.6, same again and then a 14.5. All were with 2.3 60ft's (I guess I suck). I didn't lower the tire pressure at the rears, so it may have helped if I did, but oh well. I was hoping for at least a 99mph trap.

Love the car , just need more freakin power!

 

whats rpms were you launching at,--- and how many miles on your z..... also -- temp, and humididty????

 

Launched at about 3krpm (did the same on the street and the car pulled nice with minimal to no wheel spin, so I decided to do the same at the track where it SHOULD've gripped better). Z has about 3k miles, it was about 75 degrees outside, but humid (don't know humidity levels).
The track was dead so I got 3 runs within 30mins (almost no cool down period), then parked it for about an hour or so. Ran it one last time and pulled a second 14.6 @97. I don't know.

The ET (that's my fault) isn't buggin me as much as the slow mph is.

Before I mod the car in the near future, I'm gonna take it back out with lower tire pressure at the rears just to try to improve my baseline.

Most stk new cars (such as the SRT-4, CL type-S, Lighting truck) were trapping about 2 mph slower than they should trap. I watched their cars and talked to them afterwards and they all expressed the dissapointment in their MPH.

The CL type-S had trapped 93mph in the past (per the owner) and was only trapping 91 all night (I put a good 6 cars on him during our match up). The 2 SRT-4 Neons were only trapping 96-97 all night.
Strange.

 

once again -- woh many miles on your Z?? ---- i went under the same basic conditions twice -- first time with 1800 miles -- second time with 3500 miles -- the second time i was generaly trapping 2mph faster than the first -- the fist i couldnt get any better that a 14.3 at 96mph -- but the second i got a 14.06 at almost 98