track results... don't laugh

[DCVING 6]

Ok it was my first time down the track, so don't laugh.

I was running 235/60/15 BFG VR4's @ 28psi. Stock chip, no wastegate mod. I only got to run once because it was super busy, but here it is.

R/t... 1.142 I looked at the boost gauge for a sec. DOH!
60'... 2.263 I was told I spun a little bit.
330.. 6.006
1/8... 9.082
MPH.. 79.23
1000.. 11.770
1/4... 14.045
MPH.. 99.18


My laptop battery took a crap, so I didn't get any T-link #'s. When I get my nitto's on, I will try out the thrasher chips.

 

[Sinful6]

If your boost with the stock turbo exceeds 23psi, you are just blowing hot air, and there is no benefit(maybe even a loss of power). Also, get a stock injector 110oct. chip. Other then that and working on your 60' you should be OK

 

[DCVING 6]

thats 28psi in my tires
I had 16 psi in first, and 13-14 in 2-3

 

[Sinful6]

oh! lol

 

[REGALLIMITED]

sounds like the first runs after my rebuild last year.....13.8's or so on 25 lbs of boost. apperantly its important to put the cam in timed correctly. DOH!!

 

[SilverSleeper]

Dont sweat it dude!
My first time out with the car I 60'd around a 2.1-2.2 and my ET was around a 14.0-14.1
But I mph'd @ about 104
Was my first time at the track, so I was darn nervous. These cars are all in the launch. A bad launch kills everything. Those tires arent gonna help you out much either. I was running on 245/50zr16 comp ta zrs my first time out.
All considered, I think you did well!

 

[ALBERTAN]

Lol...Glen. I don't know how to tell you this but your car is stock buddy. You ran a stock chip and stock boost. Furthermore it was your first time out. GN's were low 14 second cars in factory trim back in the day. So you ran a little better than expected. You've done the "reliability mods". Put the Thrasher 97 and some good gas in, turn up the boost, hang on, and prepare to lop the better part of a second off your time next time out. Good run!

40K mile WE4 =

 

[tim87tr]

Originally posted by SilverSleeper
Dont sweat it dude!
These cars are all in the launch. A bad launch kills everything. Those tires arent gonna help you out much either. I was running on 245/50zr16 comp ta zrs my first time out.
All considered, I think you did well!

With some BFG DRs, which I like, or some slicks, you can have a solid 12 even with 104 mph. Yea, it's all in the launch Sounds like the car is running good, and that's what you need before you turn it up. You're just a good launch, race chip and gas, scantool and about 20 lbs boost away from a high 12. Someone mentioned the Thrasher 97 for stock inj. I have ran my car once with the 97 and once with the Thrasher 100 with good results on 20 to 22 lb boost. Tim

 

[99Formula]

Even the little BFG DR's can hook hard. Let them down to about 18 psi for the biggest footprint and do a real burnout on them. I usually let them smoke for 4 solid seconds after I feel them start to spin. Nittos and some other tires can just be spun clean, BFG's need some heat. I don't even run my DR's at 28psi on the street.

Peter

edit: I just noticed he said VR's, not DR's. lol.. Well, the advice still stands. (I'd also go with BFG's before Nittos.)

 

[motorhead]

You did better than me my first time out... mid-14s @ 95mph on almost every part in my sig!

My best to date on 110, race chip, cheapie radials, a road race suspension (not drag race), and 21psi is in my sig.

Your MPH is indicative of a 13 second pass, easy! Nittos are good for a daily driver, BFGs are wicked for a weekender, and ET Streets are for the street racer in all of us. Find your compromise.

Anything is better than the stock chip, get the Thrasher and make yourself an adjustable wastegate.

Get a power inverter for your LT, taking the battery outta the picture.

Good luck!

 

[granitestategn]

Friday, Friday, Friday!!!

You first trip to the track sounds a little more sucessful than mine. My first trip was Friday night and I got 4 runs in. 17 PSI boost, 47-48 PSI fuel pressure, 23 psi in the Nitto 275's, 8 lbs in the right side air bag:

1st run: 14.192 @ 97.24 MPH, 1.16 RT (zzzzzz ), 2.196 60', o2@725, 3.3 KR at 47 PSI fuel, turned it up to 48 PSI

2nd run: 14.091 @ 98.13 MPH, .488 RT. 2.203 60', o2 @ 770. 1.9 KR at 48 PSI fuel, left it there the rest of the night

3rd run: 14.099 @ 97.69 MPH, .760 RT, 2.219 60', SM hicupped, no data

4th run: 13.990 @ 97.35 MPH, .140 RT (pushed thru brakes and redlighted), 2.130 60', 707 o2 at 48 PSI fuel
, 4.5 KR ,best time, hardest on motor , felt like it was surging and laying down all the way down the track, didn't pull hard


I didn't mess with the air bag or tire pressure all night. Didn't touch boost, Sunoco 94 unleaded, don't know why my O2's weren't more consistent (cracked header?) Water temps were around 170 going to the line (don't have a manual fan switch). Was hoping for better, but I should probably be happy because my technique sucks. I was spinning the tires but not burning them off in the box. Leaving with between 5 and 10 lbs boost. Had a hard time controlling boost at launch and watching the tree and trying not to push through the brakes all at the same time. Too much to watch! Would a Thrasher w/stutter make launching easier or more consistent? I had fun though. Next time I might throw a little race gas in for safety, or turn down the boost a pound. Taking into account my inexperience at drag racing, are my times way off or is this about normal? I have a new set of valve springs that I need to install. That may help some.

 

[UNGN]

Re: Friday, Friday, Friday!!!

Originally posted by granitestategn
Leaving with between 5 and 10 lbs boost. Had a hard time controlling boost at launch and watching the tree and trying not to push through the brakes all at the same time. Too much to watch!

Build boost to a lower level, like 3 or 4 psi, so you know it won't push, then watch the tree. When the last yellow comes on or second yellow goes out, rapidly floor the gas, when the last one goes out, release the brake. It will take some getting used to. The rapid flooring of the accelerator, spools the turbo and slighty bogs the motor, so the brakes will hold higher boost for an instant.

You may have to adjust when you floor and when you release to get a good reaction time, but it will allow you to leave much harder, with less brakes. You'll know when you get it right, because you will feel like you were rearended by a truck.

Your rear suspension has to be ready for the shock, so put 20 psi in the right side airbag

Would a Thrasher w/stutter make launching easier or more consistent?

Having tried to use one, I would say, no.

 

[granitestategn]

Thanks, UNGN

Thanks for the reply. I didn't know you were looking in. I've read alot of your replies to posts and you seem to know your stuff. I'll give your suggestions a try next time I go. I gotta get my header fixed first! I was practicing my TIG yesterday at work. I think I'll leave it to a more experinced welder to do the repair. I'm big on DIY but sometimes you just have to say "uncle". I did manage to eat up some serious tungstun, though.

 

[motorhead]

granitestategn

Dude, you have to curb that knock. Try some higher octane... it is cheaper than a new engine. What chip are you running?

 

[Tom87GN]

Heck, the first time I went to the track with my GN I was laying down some hot 14.80's at 94 mph!!! I ran my car that day 8 times and never got better than a 14.60. You're doing fine, not to mention you're probably HOOKED on drag racing now, right?

 

[DCVING 6]

Originally posted by Tom87GN
You're doing fine, not to mention you're probably HOOKED on drag racing now, right?

Been watching Test N Tune's for 3 years now. My first car was an 86 442, to slow/embarassing to run, so this was my first time racing.

 

[granitestategn]

Mr. T

I'm running a Thrasher 92, no stutter. Next time I go I'll either throw in some xylene or race gas. Or I'll turn the boost down to 16 PSI on the Sunoco 94. I'm not sure why I'm seeing that kind of knock, but I know it's not good. I wasn't seeing any on my "test track" after I put the Power Plate on. If I had time for a fifth run, I would have turned the boost down because I'm already at 48 PSI fuel with the Thrasher. Do most people tune using the fuel pressure or the boost as the "primary tool". I know sometimes you have to do both. I was getting a little knock at 47 PSI so I turned it up to 48 because my O2's were a little low. If I need to adjust the wastegate a lot, I think I will put a left hand thread on one end so I don't have to burn the crap out of my hands trying to adjust it on a hot motor. That way you don't have to disconnect the rod to make adjustments. I don't use the alligator clip, I still have my original c-clip.

 

[motorhead]

Re: Mr. T

Originally posted by granitestategn
I'm running a Thrasher 92, no stutter. Next time I go I'll either throw in some xylene or race gas. Or I'll turn the boost down to 16 PSI on the Sunoco 94. I'm not sure why I'm seeing that kind of knock, but I know it's not good. I wasn't seeing any on my "test track" after I put the Power Plate on. If I had time for a fifth run, I would have turned the boost down because I'm already at 48 PSI fuel with the Thrasher. Do most people tune using the fuel pressure or the boost as the "primary tool". I know sometimes you have to do both. I was getting a little knock at 47 PSI so I turned it up to 48 because my O2's were a little low. If I need to adjust the wastegate a lot, I think I will put a left hand thread on one end so I don't have to burn the crap out of my hands trying to adjust it on a hot motor. That way you don't have to disconnect the rod to make adjustments. I don't use the alligator clip, I still have my original c-clip.

Dude!

1) Get some ViceGrips to pull the rod off... and to reinstall.
2) Buy a hitchpin to replace the c-clip.
3) I am running 2 gallons of toulene to ~3/4 tank of Ultra94, JC94 chip and I was as high as 19psi last night. WOW! That is a fun ride. I am sure you'll get it sorted out.

Good luck.

 

[GrndNatnl]

My first trip to the track with my car was sloppy. The first run I cut a good light (.531 or something..), but my ET was only 14.7 @ 94, which doesnt make sense... why? Because the second time was a 14.5 (picked up 2 tenths) at 94.5 mph. But.. my problem is I cant launch hard because my rear brakes wont hold boost for crap. I broke the wheels loose slowly as the yellow lights were tripping down. I think it'll only hold about 2 or 3 psi. So I've got to do something about my brakes and launches.

Mines basically a stock setup, and stock chip. I have upgraded fuel pump, injectors, K&N, and a buncha other little stuff. All I need is some tweaking to utilize those upgraded parts. And definately a better chip and rear brakes. Also a heavy optioned car. All in all, I'm still learning on how to drag race these cars. Put it this way: A friend of my fathers used to have an '87 GN (that he sold). He asked me to run it for him once one night, because he said it felt like it was falling on its face at top end, and he knew I loved and stuided the car more then he'd probably ever know. He ran 13.9's in it 2 times. I launced with too much damn boost and spun to a 2.8 60" time, and only ran 14.6 @ 91. I've got a lot to learn, I admit.

 

[UNGN]

Re: Mr. T

Originally posted by granitestategn
I'm running a Thrasher 92, no stutter. Next time I go I'll either throw in some xylene or race gas. Or I'll turn the boost down to 16 PSI on the Sunoco 94. I'm not sure why I'm seeing that kind of knock, but I know it's not good. I wasn't seeing any on my "test track" after I put the Power Plate on. If I had time for a fifth run, I would have turned the boost down because I'm already at 48 PSI fuel with the Thrasher. Do most people tune using the fuel pressure or the boost as the "primary tool". I know sometimes you have to do both. I was getting a little knock at 47 PSI so I turned it up to 48 because my O2's were a little low.

Don't play with the fuel pressure with a thrasher chip. Set at 45 psi and forget it. If you are getting knock, it's due to a lack of octane or its false knock. Playing with the fuel pressure is something someone with a Direct Scan and 3 years racing experience can do. Everyone else should add octane and make sure the knock is completely eliminated. From when I installed my FP regulator (one of my first mods) until my car ran 11.66@115, I never touched the fuel pressure - 45 psi.