Just got back from the track where I built a stack of 14.1's on the Potenza's. So I decided to do a light burn out in the pit before one of my runs. Immediately pulled a 13.86. Next I did a bigger burn out and ran a personal best run of 13.78/101.39. Then a couple more between 13.9-13.8. So my advice is to go ahead and do the burn out. It will help. I have a lightly modded Z on stock tires. My 60' times went from 2.2* down to 2.06-2.11.

Timeslip #87

 

Congrats on the new best!!!!

You're going to be pulling me out of the hole in no time! I take it the track was pretty nice today??? Any other Z's there??

Brian

 

Thank you Brian. It was a pretty nice day overall. 55 degrees and partly sunny, with a little tail wind. It was a little crowded for a while, but it thinned out. I think the crowd was due to an RSR club in attendance. There were 100's of little Acuras running around. I swatted a few.

There was a LS Performance model out there. His best was a 14.6, I think. I watched one of his runs @ 15, so I was feeling pretty good about my times. :-)

Next weekend is Mazda Rev It up and Joliet Autox for me. Good luck on breaking into the 10's with your bike next weekend.

PS. I'm still in awe of your 103 trap speed. Somewhere in my driving is almost 2 mph!?!

 

Good job on the times...launch makes all the difference in the world. Do you have any mods?

 

Thanks Alberto. I've got an ECU, Pulley, y-pipe and stock 18" tire. I think with my present setup, I could get a 13.6/102.5. There was some room left in my launch and a little in 2nd gear. I was happy to get consistent 13's though. That felt good. Its tempting to wind it out a little more with the ECU, but I found that shifting @ 6200 was best.


I've got a set of Toyo's, the 350EVO final gear and a Nismo LSD coming, all in the next week or two. That should get me into the low 13's. My present goal is to just dip into the high 12's. I would be pretty satified with that, until FI comes. ;-)

(I see you've got a 104 trap!! Sweet what was your et on that? So now I have to find almost 3mph!?! I'm not sure its in my car )

 

zillinois, have you dyno'd? Depends where your numbers are in comparision to them. You are modded whereas they are not, so you should do better assuming similar conditions and better dyno.
Good luck!

 

I only have a a baseline dyno. That was 242. Very similar to Brian's. I have yet to dyno with the ECU, pipe and pulley. Best case scenario is my mods give my 10hp over those guys. I don't think 10hp peak is enough to do significantly better in the quarter with street tires. Brian or Alberto can correct me if I'm wrong there though. Driving is a more important factor than 10hp. Brian and Alberto are able to squeeze every last drop out of the trap.

I purchased these particular mods not so much for their power, but for their power to work with the traction mods I will be adding. I have wider tires, NISMO lsd, traction rods and 350evo final drive all coming within the next few weeks. The final drive is going to make my motor rev faster, so I got the ecu to bump up the rev limiter. And the y-pipe to free up the exhaust for the faster reving motor. And I got the pulley because that should help the motor rev freer. After all that, I think low 13's should be possible without any more power than what I have now. I'm also thinking about getting some test pipes with resonators. But that's about it. With lots of practice maybe even 12.9?

 

Man if you could hit 12.9 w/o FI, that would be bad a$$. zillinois, you are that people that want faster times don't need to think about HP mods first. Knowing how to use that power you have properly and buying traction upgrades are very important.

I wanted a bigger rims (19's) and wider tires, but I didn't want to gain weight at the rear wheel. I bought some konig's and 275 s03's and lost 4lbs in the back! I'm hoping with a good launch technique I can get my 60' foot below 2 seconds.

 

Thanks Basam. 19's definitely look awesome on the Z. But it was a wise choice to stick with the lighter 18's. I'm not too familiar with the S03's but just about anything is better than the Slotenza's.

I'm pretty confident about hitting low 13's N/A as there are already people doing it. 12.9's may be optimistic with near stock hp, but you never know. Most mods move our powerband up even further, making it harder to drive well, not easier. I'm a firm believer in getting the most out of what you've got before you add hp. Then when its time to add, add with a calculated plan and goal in mind. Its the same on road courses. People add all kinds of power before they have even tried their hand at factory power levels. I will find out in a few weeks!

 

I think your low trap is due to your early (6200rpm) shift...I shift at redline. Try it sometime.

As for the wider tires...are you putting 295 tires on the rims that you had on the car????? How wide are those rims???

Just a little info...I have 275 S-03s on 18s that I run in the summer and they DON'T hook up nearly as well (in a straight line) as the snow tires or my stock RE040s did. Wider tires are not necessarily better in straight line...

 

I'm selling the rims which are presently on my car. I've got new ones coming this week. If you know anyone interested let me know. I get compliments on them everywhere I go and hate to part with them, but I need the dough to fund the new setup. geoffbrown@comcast.net

I experimented quite a bit yesterday with shift points. I have the TS ECU so I have a little more leeway to wind out. But I found that shifting at 6200 going into 2nd helped me hook better. Then the rest of the time I would shift at 6600. I think I just need practice, practice, practice. Last Saturday was the first time I drove my car since October so I was a little rusty.

Thanks for the info on the S03's. I remember you mentioning that at the track. I thought that was really odd. Have you run the S03's in warm weather? The reason I went with wider tires is;

1. because I plan on running street tires and lacking a drag radial or R-compound the 3.9 final drive and NISMO lsd would probably smoke a skinnier tire. Plus our car is a bit of a piggy so I think it could handle the eased weight distribution that a wider tire provides. I am in experimental mode right now. So we'll see how it all comes together, or not. Any advice feel free to chime in. And

2. I am going FI at some point and want to have the drivetrain all ready.

Brian do you have any experience with the Toyo T1-S? I just read the reviews and stats and ordered based on that. They seem really sticky, but its hard to say. The traction is AA and the treadwear is 280 compared to the 040's A and 140 and the S03's AA and 220. I guess I'll find out in a week or two.:-)

 

I bet your car would hook with the 3.9 final drive and Nismo LSD with some soft snow tires on 17s

The key to traction is sidwall flex and rubber compound. The problem with the wide tires that are low profile is that you get virtually no sidewall flex and you typically have to heat up the tread compounds A LOT before they grip well in a straight line if at all.

I had the S-03s all last summer including a lapping day at Gingerman in which they DEFINITELY got hot....they compound was all mushy and deformed after some hot lapping and my tires got up to the 45psi range from a 35 cold fill...

As for the T1-S's...although they've gotten pretty good reviews, from what I've seen in the real world they wear VERY quickly (the treadwear rating is only useful for comparing tires of the same brand) and get a little greasy once they get hot....S-03 is a better tire in my opinion.

If you're going to go FI anyway....I'd pick up two 17x8-8.5s, throw some BFG drags on them and be done with it. Don't even bother with the wide expensive S-03s or T1-S's on the strip.

 

You're a funny guy!

Thanks for the info on the T1-S's. I certainly was not implying that they were better than the Pole Positions. Those are some of the best street tires available.

I'm trying to stay away from mulitple sets of tires sitting around the house. So I'm going to have to sacrifice something. I don't drive the Z for almost 5 months out of the year, so I don't care about treadlife. I want to run at the strip and the track with the same tread. Since, I already bought the T1-S's and the rims, I'll just have to see how that works out for now. If its a no go, I'll have a set of 295 T1-S's for sale.

 

If you're shifting into 2nd early at 6200 rpms that will explain the lower traps. Although you might hook better shifting early you will achieve a faster time and trap by shifting at redline especially considering the power band of the 350. Try it next trip to the track . I want a Z

 

My e.t. was a very dissapointing 13.78, with a $hitty 2.17 60ft. Also ran a 13.74 @ 103.3 with a 2.16 60ft. I ran a 13.77 @ 101.4 with just a K&N, difference being my 2.052 60ft. I would suggest getting some test-pipes if you want to increase your trap. Very cheap, easy to install and gives good tq gains in the midrange as well as top-end. If I was you and I had that ECU, I would wind 1st gear out to 7000 rpm, so when you shift to 2nd you would fall to about 4500-4700 rpm's, thats closer to your tq peak than 4200 rpm which is where I think you fall if you shift at 6600. Even though it doesnt make power up top, do it in 1st cuz it goes so fast. Every other gear like Brian said shift at redline. Good luck next time @ the track, hope you hit your goals. Keep us updated

 

Thanks guys. I can always find more in my driving. Shifting, launch etc. I think its just down to practice. I did not try to wind it up to 7000 though. Maybe I'll give that a try.

 

i dont think you will hit 12's with that set up. Not saying its impossible because ive seen bolton gts go 12's on regular street tires, but they had to pull 1.8 60's and trap 106 to do so.

 

a 1.8 60' and 106 trap should be WELL into the 12s...unless you're talking like a 1.89 60' then high 12.8s to low 12.9s...

 

I ran a 12.9@106 with a 2.05 60' but I think my fukked up tranny stole some MPH . And thats with wrong wheel drive just thought I would chime in cosidering the factors.

 

I'm pretty sure a 1.8* - 60' would be out of reach for my Toyo's. My best is 2.06 with the factory setup. So if I add the NISMO lsd, 3.9 final drive and wider, stickier tires I think 1.9*'s are a reasonable expectation. I think that would put me in the low 13's. I don't know, but I'll find out in the next few weeks. ;-)

I appreciate all of your input greatly. It helps moderate my expectations. I'm putting $4,000 bucks into the car, so it better hook!