clivej

Hi Guys,
On sunday i went to the track meet and totally enjoyed it, I would like your impressions of my runs and an i reaching ie. capabilities.these are the facts.I am very happy with my time at the track.1st run, 15.754 ,I was admiring canaan's car move up the track instead of flooring it. R/T 1.8 i think , the sheet is creased through this line.2nd run,15.250, R/T 1.035, two previous runs were run with traction control on, and a idle trottle speed of 4000 RPM. I had turned my A/C off.bad idea.My last run was a very respectable 14.703,R/T .989 still with idel speed at 4000 RPM but with traction control off. All this from a 98 gs400 with 91,000 miles, K&N drop in air filter and SS borlas. I dont think high 13s is out of the question, better R/T , A/C on which would bring my idle speed to 7000 RPM and reset the ECU, i honestly do think high 13s is attainable. What do you guys think.
Clive

doug_999

I'm assuming by R/T you mean reaction time. Unfortunately that has nothing to do with your Quarter mile times. You can take all the time you want to take off, the times don't start counting until you cross that light and start the counter.

I don't think the GS has a chance at 13s - at least on a normal day (maybe on a nice cold one with really sticky tires and a different torque converter) - but probably not. I think it would require some weight reduction and more than just the torque converter upgrade.

Francis K

A long long long time ago on the forums sombody posted a high 13 timeslip on a completely stock GS4.

He took the spare tire and everything out, he reset the ECU and had low gas........try it.

gsintensive

with light wheels 18s + torque converter + LSD + intake + exhaust high 13's is easy to obtain.

no way a stock GS can run 13's. a few pounds off the spare and etc wouldn't gain you half second off. (which is a LOT)

Francis K

but here is somthing from a couple years ago that may interest you......

https://www.clublexus.com/forums/sho...t=torquemaster





18's=light wheels?!

redgs4

My 18" Volks have an actual measured weight of 16 pounds and change, each -- with the rears about 1/2 pound heavier than the fronts. With the soon to be added TC and LSD, I'm hoping to kiss the high 13's. Don't think I will, but I'm hoping!

Francis K

There are some very light wheels (Volk being a great affordable example) but for drag racing you sure as hell better not be looking to get performance from 18's....

JBrady

My 14.22 was in AWESOME air, 43 degrees, 30.4 in/hg. Mods are VERY basic, no rear mufflers, modified stock air filter housing, no jack, no spare, no extra junk in the car, 1/4 tank of gas, no ecu reset, 225/60-16 Bridgestones, 2.20 60ft, let the tranny shift itself, 2000rpm power brake start, 3950 pounds raceweight. The 60ft is very important. I could not launch any harder without totally loosing traction. IF (a very big IF) I could have gotten enough traction to leave hard.. and cut a 2.0 60 foot... I would have been VERY close if not HAD a high 13 pass.

Now, if I can do this with my heavier LS400 with 10hp/10tq less than a GS400... I believe a BONE stock GS400/430 COULD get a 13 second slip with sticky tires and GREAT air... and ahem... proper piloting

Now, with LSD, sticky tires and a TC... VERY doable. Add in intake and exhaust mods... you get the idea.

v300

adding to Wei's equation:

17X10 wheels 275/35's (heat them up a bit), 2800RPM lockup convertor, 3.76dif, use TRD drop in filter and S-AFC (concentrate settings on torque vs hp), remove the spare tire but add 75 pounds of sandbags , 75shot of NOS wouldn't hurt either.

Good luck

DaveGS4

iTrader: (2)

I think this thread is a real challenge to us this season.

FOR THOSE THAT SAID 13's ARE DO-ABLE with a modified or stock NA GS, please scan a copy of your timeslip and post it in the gallery! I don't think there are many normally aspirated GS drivers on CL who actually have one, regardless of mods like TC, LSD, tires, intake, etc.

By no means am I not saying that they are unattainable. Just like Jbrady said, it takes a good driver. My girlfriend got a 14 sec flat run in her NSX at the track with a nice launch and run. I only got a best of 14.5 on the same day with terrible traction problems. We've raced our two cars enough to know that my car is 'just a little' faster than hers, but I personally don't have a 13 second timeslip to post.... yet

Since that time at the track I've got a LSD to help solve my traction problems, so I'm eager to see some runs this year.

All the other folks that say it's easy to break into the 13's, let's see your slips!

RON430

"Gang - Well, here's the best I could do in 6 runs in hot ( 78 degree ), humid ( 80% ) Cajunland last nite - 13.88 @ 104.5 mph. Really pleased considering the weather conditions. Sorry I don't have any 60 foot times but after all the rain from TS Allison last week, not all the equipment at the track is currently working. The car ( & me ) weighed in at a hair over 4100# with half a tank of gas. I wanted to see just how she'd run in FULL street trim so the tires were at 42# as usual. That was a 13.99 @ 104.1 mph & was the first run ( temp was near 87 degrees then ). The best time was also my last run as it had cooled down to the 78 degree mark & humidity dropped a little. Tried varying the rear tire pressures but didn't help much. Not much wheelspin either as the 18" Nittos ( not the drag models ) were fairly sticky, especially after following some other runs made by folks with slicks. Managed to hit all my shift points perfectly & launched at 2500 rpms instead of the 2200 I had to use when I got my 0-60 times ( listed in the Q&A ) because of the better traction. For kicks, I had my G-tech running along with the track timers & it was, as I suspected, more optimistic but still fairly close - it showed my best run as a 13.76 @ 105.1 mph. Hope to go back later this summer with a friend who has a drag car & trailer so I can see what effect running 16" wheels will do - since traction is so good at a strip, I'd look for better times & mph due to less rolling resistance & unsprung weight."

Above is a post by Mean Gene from 2001. I didn't go into all of what he had on the car but I believe it was the SRT intake and ECU, TC, and LSD, no NOS or forced induction and running 18's. Also not sure if he had a few pounds of sound system in the car or not and I would not discount the benefit of someone who has some experience drag racing. One more thing, we have all been aware of the impact on acceleration of larger rim sizes but if you want to see the effect on lap times, get the current European Car. They tested the same car with 15's, 16's, and 17's. They like the "feel" of the 17's but the 15's and 16's produced almost two seconds a lap quicker times if I remember correctly. Whodathunk?

DaveGS4

iTrader: (2)

Exaclty the stuff we need to see Ron! I recall Gene had that one run, and I believe GS400 Pusher had a 13.9 with his stock wheels. There was a guy on the old EZBoard that now has an LS430 that claimed to have a 13 second run too... I don't recall any others though.

Needless to say, we need more! Post your slips!

gsintensive

hey!! aJ. haven't seen you a while. the V300 up and running yet? I can't wait to see the first converted V300 turbo still very knowledgeable like you always have been. take care.

Wei

GS400_PUSHER

Hey guys! Well I need to update my 1/4 times I am currently running 13.9 on the 20s now. I also had to invest in a Halmet too but it was worth it. Still my MPH is down 101mph compare to your 104, I guess its the 20s. Next week I will install my L-tune exhaust and head back to the track. The key to a fast 1/4 mile time is to get your 60ft down thats where it counts (the launch & traction) also stay in Drive unless you really know how to gate shift. A GS430 is quick than a GS400 Stock vs Stock! I seen a GS430 run 13.9 Stock and looked under his hood afterwards.........I didn't see nonthing .

gsintensive

13.9 stock!? that is about 5.5~5.6 to 60. hm.. doesn't seem too realistic for bone stock 430. However, TC can certainly change that , and you can't see it too. (same goes to LSD) O_O