its good i knew you weren't implying, just always a possibility. i felt the same way before i did my 3 pulls. kept saying to myself what if he tweaks it so that i will come back. had never been to dyno before then, and when the guy told me i should drive my car for the pulls i was a bit skeptical of the results i would come up with. it was a cool experience though, driving a car 110+ while not moving was foreign to me lol

 

raced a 2010 6sp 370z at the track the other night and recorded it best i could. my mount broke and didn't want to risk the camera falling off on the track. got the first video from a buddy of the 370z. sorry for the quality.

it was pretty close imo.. i fouled early off the line so i could get traction. but we were basically dead even until he began pulling in 3rd. after the race we both agreed the quarter mile would have been way different outcome... his friend recorded it on iphone and obviously knows nothing about racing so ignore his ridiculous comments.

370 8.92@81.53
TL 9.24@77.82
from inside my car
vs pontiac gto

 

damn son you can launch that car....well done !!!

 

nice solid runs!

 

9.2 1/8ths will result in upper 14.2s to mid 14.3s.

This type of perfomance from the TLS cars continues to confuse me because I continuely some really wild street and dyno claims from ownes of these cars yet when they go to the strip, they run what you'd expect (lower 14s at 98-101mph). I think with the 6mt cars, you could see some mid 13s on slicks and good driving, but on street tires, you're probably looking at 13.9-14.1.

 

I ran 14.0 @ 102 with a 2.34 60' on way over-inflated tires making 256/222 SAE. Also on 0.8" larger than stock diameter tires. With the "DA correction," the run was 13.86 @103. After my new intake manifold setup I don't think 104 traps are out of the question.

I seem to have no problem launching on the street though. Not the greatest launch, but I put it on a stopwatch numerous times and got 5.5 - 6.0. I got 5.5 once as well as 6.0. It's not 5.5, but I got 5.7 about 5-6x in a row, as well as a few 5.6s and 5.8s.

 

cdc86, how are you launching your car?

 

thanks guys I recently swapped out my short ram for cai to see how I would run. was more consistent and had higher trap speeds so learned my lesson on that. I got my 60' down to 2.20 on the oem pilot mxm4's. waiting on them to wear completely. plan on running the 255-45-17 nt05's.

@dave_b

I will find out in a couple weeks when I finally make the drive to the 1/4. your right on with those times, I did a 1/8 calc and got 14.20 but hope to break 14's with exhaust and tires.

that thread you created on drag tips was a great read. can't say thanks enough for your 5at guide. followed it word for word and now it's just routine. it helped me stage correctly and even got the second stage light to flicker then light up without moving which resulted in my fastest time. thanks again man

@abyss

I would follow dave's sticky on drag tips if you want it explained in great detail.

some think letting psi out of street tires won't help, I believe otherwise. I like showing up early so I can run back to back and figure out what psi is best. every car's weight is different depending on driver, engine etc. I'd say start at 25psi hot and purge in 1-2psi intervals. digital t-p gauge is your best friend at the strip. you want to pay attention to your 60' and your trap mph while adjust pressure. the goal being lowest 60' without losing too much of your top end speed. if your launching hard everytime, you should see your 60' slowly drop as you let more air out. when you see your trap speed dropping more then 1-2mph, add small amounts.

After avoiding the burnout pit start by pulling ebrake (vsa off) and do short tire chirp while disengaging ebrake while approaching the stage light, throw it in neutral and do high rev with foot on the brake. you should feel the brake pedal give and push down slightly further. now your ready to launch. shift over to first, wait for the tree to start counting down. when you see the first green light start building rpms around 2000-2200 works best for me. let your foot off brake while punch the gas and make sure not hit the rev limiter. good luck!

 

Ya, I think there is some things to be said for that as there are with most fan dedicated sites but then there are some things such as your last point which should clarify your own confusions. Kind of like answering one's own question.

Slicks don't actually make a car faster, they don't add power or reduce weight, etc, but they help you run better. High powered FWD's don't tend to "run" as well but that inability does not effect roll race situations or dyno runs and there lies the disparity or disconnect. These things don't always have to correlate with each other as deviations exists mainly among different drivetrains, then setups, drivers, etc.

 

Our cars are not slow from rolling speeds. From a dig they aren't that easy to launch and you don't see many people going to the track on DRs with the TL/Accord. There was 1 person who ran on DRs with bolt ons and ran 13.33 @101.x. These cars have the potential to go low 13s but most of us don't see it because we run street tires. If I was on DRs and pulled a 1.9 - 2.0 60' I'd be at 13.4-13.5. But running over-inflated tires and getting 2.3s was my choice of attack (lulz).

We do well from rolls. 20/40-45 rolls are great. We can hang with cars who perform better than us in the 1/4 mile. Our powerband is actually pretty strong from roll racing speeds. Check my dyno; from 5K (VTEC) I'm ~220wtq and like 220whp if I remember correctly. I peak at 256 but was over 250 from 6K to redline. The torque drops off at redline but not substantially like some other dynos I've seen. The J series is a good motor and has plenty of potential with bolt ons, especially when adding a tune.

 

To clarify, when you stay start in first, do you mean from the triptronic selector or just manually putting in the L. I did a couple starts with the triptronic version and it keeps starting me off in 2nd then kicking down to first. Odd.

Otherwise, anything over 25% throttle just starting out = spin city.

 

you want to launch with the car in tiptronic 1st gear for best results. I'm pretty sure L will redline at the top of 2nd.

regarding your car not holding 1st, you should probably check out your pressure switches if you can't make the car hold gear and shift at your liking. wheel hop and lost traction is normal when wot off the line but depending of your tires they should hook up around 3500 rpm

 

Pressure switches are relatively new. I think it might just be a base model thing. If I hold the brake and rev above 1500, it switches to 2nd gear in triptronic. However, with more experimenting today, if I put it in L, it launches like a bat out of hell. So. I might try that next time. (switching it over to D at the top of second of course.)

 

Great.. Mazdaspeed3dude is going to be up in here spitting all types of rhetoric about boost cut first second third fourth guy doesn't know how to drive buslengths bs..

Otherwise, great vids.

 

I didn't even realize your tire pressure. 20PSI is pretty low, but may have helped you get better 60' times. Increase your rear tire pressure to ~40 next time, your trap speed will be a little better. I'd try your fronts at 25 too, that should also increase your trap speed while not having too much of an effect on your 60'.

 

haha thanks man really appreciate it. just glad you didn't say it
can't have my thread show up if you search that name

there's a lot of talk and not much proof around here. thats why it's fun going to the strip or doing highway rolls. when you think don't even have a chance to hang against some car and your dead even until high gears. its great feeling knowing all your work pays off.

how someone can think stock mazda is pretty fast... understandable. select few stock cars could even support his claims lol guy must think he driving the 2013 shelby gt, in a more compact 200mph+ zooom zoooomm form.

good point. forgot to mention that i adjust my tire pressure before i leave my house so its accurate as possible. i should have said no lower than 20 psi cold. its a 20+ mile drive so by the time i get there my fronts were 24-25 hot. i always watch couple races while my car cools down. i was letting couple psi out of the rear because in my head thought it might slightly alter wheel weight. thanks sonnick i will have to give that a try next time

 

It's that time of the year again! Went to opening day over the weekend at my local test n tune, great turn out. Conditions were ideal in the low 60's with no humidity and the TL was running strong.

Ended the season last fall with an 1/8th mile of 8.98 @ 79mph with the following mods; 3.5in intake, PCD, jpipe, stock exhaust, maxbore throttle body, p2r tb spacer, port and polished intake mani+runners.

This year I went back with the rv6 td exhaust, running a ms3 base tune and the 3.7l manifold + ZDX throttle body. I could definitely feel a difference in heat soak between the oem manifold vs the sh-awd. It was cool to touch throughout the entire day of racing. Set a new personal record for the 1/8 mile of 8.84 @ 81.65mph. Had a 2.16 60ft on bald oem mxm4's. More videos to come soon!

 

nice! for comparison, what does the stock tl-s do on the 1/8 mile?

 

Great run man! For comparison, on my best run of 13.46 in the 1/4, my 1/8th was 8.83, so that's solid! Are there any 1/4 mile tracks near you? I trapped 85 in the 1/8th, but the DA was (-), so that definitely helped. I'd be interested to see how much you pick up in the back end. I wouldn't be surprised if you picked up a solid 22.x MPH (considering you stay in 3rd through the traps), putting your traps around 104. That's awesome man, especially for the auto. Very impressive. Any plans on getting a dyno tune?

Paperboy: Stock 5AT TL-s should do it in like 9.4-9.5 I'd imagine. Around 77-78mph.

 

Quick & dirty is to add about 22/23mph to the 1/8 mile speed.

 

^ 23 may be a bit much for the TL. I'd say it could be 21.5-22.x though. 23+ is a serious top end car.

 

Agree, 23 might be a bit high. I am 90/114 +24 with the 335, but the fast 1 & 3's are + 30. Might be a turbo thing on how it delivers power.

 

75-77 mph from the few in the compilation thread, but they don't seem to pick up quite as much on the second half as the manuals. Maybe due to the 4th gear drop off?


Nice work, op. 2.16' sixty foot is pretty solid. I'd look for a 1/4 track nearby. You're definitely solidly in the 13's.

 

I'd guess he is only gaining 20mph in the back end. Most cars I see around that area are picking up ~20...Pretty sure I was doing 83-84 in the 8th...a lot of turbo cars I see will gain more mph in the back end at least from my experiences.

 

the automatics do not reach 4th gear until 109 which is well past the 1/4 mile time, so that shouldnt be an issue

 

Your trap speed is actually an average of 3 different mph's towards the end of the 1/4 mile. So it's possible if the car is trapping 104-105 that it could hit 109 in the 1/4. Your trap speed is NOT just what MPH you are crossing the line at. Common misconception.

 

^ Weird, but true ha. I didn't know that either until last spring/summer.

On my most recent track venture, I averaged 21.82 MPH in the back end over the 3 clean runs I had. I gained 21.59, 21.71 and 22.16 respectively.

 

My bad, I was thinking the 5AT needed fourth around 90 mph like the 6 spd.

Speed gets averaged over the last 66'. If he's trapping 81.xx in the 1/8, he's probably 101-102 in the quarter.

 

I don't think the trap has any real effect on the speed posted vs the real speed of the car at the finish. The trap is 66 feet long & at 100mph the car is traveling at 147 feet per second. If the car is only gaining 20-22mph over the final 1/8 mile (660ft) & while very quickly tapering off the 66 foot trap should not change anything measurable.

Could be wrong but would need to see the numbers.

 

^ True. Although, 66ft is 10% of the 1/8th mile. Although acceleration isn't 'constant' over that final 1/8th, for arguments sake, you could take 10% of the back end speed, which would be ~2mph. So you may be traveling 2mph faster once you cross the line in comparison to your trap speed, which is averaged in the last 66ft. Hope that was clear.

 

Yeah 10% is the easy way . The reason I did not do it that way was because of how fast the rate of acceleration decreases the closer you get to the finish. Question is it has to be less than 10% but how much? Its too bad you get a 1000ft time but not the speed.

 

What were your older gains pre 3.7 manifold/4" intake? I looked over my last slips and most were ~20.5 mph, 79.xx 1/8 and 100.xx 1/4. The weird thing was, I had one 79.90, but that trap was only 99.90.

I'm shooting for 81/102 with the 3.7 swap/4" intake and around 80 lbs less weight this spring. Should be able to do it.

 

I think you'll do it. GL

 

Yeah exactly, my numbers were not exact by any means....I did NO math, was just posting up to show people that you are hitting a higher MPH in the 1320 then what the actual trap speed of your car is, since trap speed is an average of 3 MPH's, you would absolutely have to cross the finish line at a higher MPH than what your actual trap speed is. (Unless you break of course)

For instance a 100 MPH trap exactly could be 98, 100, 102 or it could be 99, 100, 101...regardless the point is you are going to be moving faster as you travel the finish line than what your trap speed indicates.

 

Its an interesting academic exercise but at the end of the day the speed that counts is the one in lights.

BTW in NHRA & IHRA the speed trap is 66ft that ends at the finish line.

 

actually 23mph is very possible considering what he has done on the intake side....

for comparision when I had my TL-S I trapped 79.29 in the 1/8th and on the 1/4mile I trapped in 102.11 so my back end gained 22.8mph....

I only had full bolt-on RV6 exhaust and SRI intake so would not be surprised if he saw 103-105mph 1/4 traps...

Either way some great numbers!

 

23mph won't happen, anyone wanna paypal bet me???????

dblack021@gmail.com

Taking all comers

 

Quick look at Drag Times & the only TL that had a 23mph backend were supercharged. Next best was 22mph so I guess it possible for a bolt-on but not likely.

Some of you guys who are doing well need to post there to build up the TL list. its free, all you need is a copy of your time slip so they can verify the numbers. They also publish dyno runs.

 

I concur!

 

I gotta get mine up there