A little dissappointing. I typically trap low 94s to low 95s under these conditions (80deg, 70% hum.), probably averaging about a 94.6.

I made 4 runs, 2 when the car was hot from the trip there and 2 after I let it cool for a while.

14.626 @ 95.74
2.287 60'
9.483 @ 77.06 1/8th


14.55 @ 96.37
60' unknown
9.445 @ 76.15


14.449 @ 96.60
2.209 60'
9.336 @ 77.20 1/8


14.445 @ 96.53
2.248 60'
9.335 @ 76.93 1/8

 

These are lower traps that I was expecting. I am going to go through and check for leaks, and exhaust leaks as it kindof sounds like I have one, and with those retarded gaskets WSP provided with my test pipe, I wouldn't be surprised.

BTW my setup is:

96 GXE 5spd
134K miles
JWT POP
Cattman SS Y
WSP test pipe
CF hood
15" lightweight Mazda millenia wheels with **** tires.(front)
Removed spare, jack, trunk cardboard thingy, and passenger seat.
I had about 1/3 tank. Scales weren't on today, but I'm always right around 2930 lbs with me in the car.

 

I forgot to mention the most important thing:

I am running every gear to an indicated 6700 where my rev limiter kicks in (its tach error, as I discovered from testing out my RPM switch). I run each gear as close to rev limiter as I can without hitting it.

On the first 2 runs, I got to 6700rpm about 40 feet shy of the finish line and shifted into 4th (actually between the 60' timing lights that calculate your trap speed). At that speed, I probably crossed the finish line prior to completing my shift. This totally sucks in case you dont know.

On the last 2 runs, I tried leaving it in 3rd as I crossed the line. Sure enough, I banged the rev limiter in 3rd about 30-40 feet shy of the finish line both times, but I kept on it.

I need smaller front tires so I can shift to 4th earlier and not have to worry about being halfway thru a shift as I cross the line, or banging the rev limiter as I'm crossing the line. If I'd had smaller tires, who knows what my traps would have been, maybe in the 97s because they wouldnt be fux0red by hitting the rev limiter in the last 40 feet.

I'm going to try running with my slightly heavier but shorter 17" K1s with 235-40-17 T1-Ss next week.

 

keep trying man. one of us has to at least get 14.2! i've only run 14.3 three times this year. my mph seems to have improved with the addition of my exhaust. i'm pretty busy with my new job, but soon enough i'll have some time to run on the track with some cooler, denser air.

 

6700? I dont recall but didnt you have a JWT ECU?

I'm sure you've thought about it but if ya set the rev limiter to 7K you probably wont have to shift into 4th

the VQ can run strong up to 7K I've seen Mathels hit 7300 no probs

 

i don't get it....

stock max tend to run between 15.2 and 15.9

i was hoping to run high 14's with my max and i only have y-pipe and CAI

and u have all that plus VI and u only running mid 14's? why is that?

 

I think your times are pretty good.. low 14's.. isn't that a pretty good time? Or are you disappointed by your trapspeed? What was your 1/4 time before you got the VI?

 

Track conditions sucked... if he was at Englishtown PA dead of winter or an extremely crisp day I'm sure he's be very very low 14s if not 13s

 

i ran into the same problem (3-4 shift). i just shift out of 3rd a little early, that way im into 4th right before the lights. i dont have a VI so i guess your winding it out for those purposes.

let us know if the tire swap yields any improvment

 

You're showing over a 2mph gain on a hot humid day, I'd say that's pretty freaking good. Wait till it gets cooler out. What kind of ETs do you usually run under these conditions?

As for the leak, what are you hearing?


Dave

 

I've done some simulations and I found that you'd actually need a bigger tire to increase the trap and lower ET. Unless you get a higher rev limiter, there really isn't much hope. Shifting to 4th early won't have you running a better ET/trap as staying in 3rd will. All you need to get 99-100mph traps is 6800-6900rpm.

 

I believe it was you who pointed out that with a 7K redline you would not need to shift into 4th good stuff

Nealoc why is your car being limited at 6700?

 

Man, those are 4 low runs and for a muggy day. I will have to say that you sure know how to drive... It would have been interesting if you had turned off the VI and just drove how you normally do. Although the VI closed the whole time is not quite stock manifold, it would have been close enough for a comparison to be drawn. I think you did well though. I'm very impressed at least.

 

i just noticed that you have that kind of mileage on the car! that's very impressive. i have about 99k less than you and you're still running low 14s. when did you get your variable intake manifold? i must agree the WSP test pipe could fit a little better. if it were a cm shorter the cat bracket would sit completely flush and probably would provide a better seal. if you think yours is leaking, tighten as much as you can or try adding another gasket.

 

I agree with Dave. I wouldn't be too disappointed. A 2mph gain is huge! Considering the weather, I wouldn't worry too. I'm certain that you could run a 14.2-14.3 if the condition was better.

 

yo people hit 14.2 and 3 with just an intake and y pipe ...how come you guys cant hit 13s with the VI ...just curious...i was thinking about investing in it eventually but for these times it doesnt seem worth it to me...

 

It sounds like you don't have any 1/4 mile track experience (I'm not trying to be rude). On a 80+ degree high humidity day, you're looking at .3-.4 slower ETs and 2-3mph slower trap speeds. Hot air and humidity kills these cars. Under similiar conditions, I run 14.9-15.0@94mph. On a 60 degree day with lower humidity I run 14.7s@96mph+ with my eyes closed.

Let Neal run on a cool crisp 50 degree day and he'll be running low 14s at 98mph+. If he ripped off a 2.0 60', he'd be 13s. Any car that can get 97mph trap speeds is capable of 13s with a 2.0 60'.

We'll see how my VI does. I'm shooting for next Wednesday night at the track.


Dave

 

hey luckee2bhere, how are you doing? i remember seeing you at atco earlier this year (the only max.org member to at least show up at the pits). would you want to race at atco anytime soon? i'm pretty busy right now, but hopefully a test and tune session will come upfor me. i've been thinking about the VI, but i think if you're going to be spending $$$$, cams will provide tangible gains because they play with valve timing which ultimately decide how much intake charge goes in. perhaps, for less money, the Gforce or JWT ECU would be a satisfying alternative.

 

Cams are going to cost at least 2x as much as the VI, not to mention cams are something you can't really install yourself unless you REALLY know what you're doing. I'm getting a JWT ECU here at some point which should help out alot, given its raised rev limiter. I also don't have some of the basic mods still, UDP, intake mid-pipe, and exhaust, which I also need to get. I'm still gunning for 100mph trap speeds

 

Too bad you have a rev limiter. I'm sure that would definitely help your times...but what were your times before the VI just out of curiousity. Are you planning on taking a run down to the track in a few days if it cools off??? Becaust it would be intersting to see the differences if you turned of the VI and ran on run with out or like 2 runs without and 2 runs with. I just envy you for that fact that you have a 1/4 mile track close to you.

-John

 

I think those are decent times given the conditions and that your goal of breaking into the 13s is still attainable. H!ll you could be running a 15.1 @ 93.6mph like I am. Nothing like having a trap speed of mid to high 14 second car stuck in the 15's because of a poor 60' time. Hopefully the new tires and more practice will get me a lower et.

 

Some factory tachs are more inaccurate than others. All the 4th gens are limited to 6500rpm by the ECU. It shows at 6700rpm on his tach, but I'm sure in the lower gears it probably higher since they wind up faster. The only way to raise the rev limiter is by reprograming the ECU. However I'm aware of a 3rd gen member that used a S-AFC to increase his VG30 rev limiter from 6200 to 6400rpm. I'm not sure it would work on the VQ though.

 

yeh dont be too disapointed. maybe its the mileage?

 

yeah man i got ya...it occured to me a second after i posted that these times were during the summer.