MADE IT TO THE TRACK,,THE LAST TEST/TUNE DAY

[myvega]

My Bad. Sorry.

[2lucke4u]

Thanks for all the replies.you guys are great I will get it set up 3neg,will it do anything in the way of et / mph?
Charles

[cosvega76]

Charles,

Unless you have some replacement upper control arms, there is no way you will even get close to 3 degrees. Mostly, the range available with the eccentric cams on the vehicle is about 1 degree either side of zero caster.

Some guys have swapped the uppers side-to-side, but that places the upper ball joint at a severe angle. That may affect the longevity of the ball joint.

Chuck

[GizmoN]

Just to set the record straight, positive caster is where the upper ball joint is behind the lower one, like a dragster.

Chuck

Just wanted to have this clarification on this page of the post as well. You want positive caster. Caster shouldn't affect speed, only toe.

[Fasterthansome]

Are we sure this is an alignment issue?
I am trapping over 150 mph with no handling issues and there is nothing special about my alignment. Also have the front sway bar removed.

Is it possibly a rear tire pressure issue? Too low?

[2lucke4u]

Guys
no front sway bar,,rear tire pressure was at 14psi,,checked lca bolts and every other bolt under the car and nothing is loose,,the tires have been balanced,do not remember this problem when I raced last year,,I will check it all over again and have the wheels checked for balance,,maybe one lost a weight,,anything else I should check,,,I expect 10.20's @130 next time out and drama is not my cup of tea,,,
Charles

[rustorbust]

Hey 2lucke, what kind of air pressure are you running in the air bags? For the longest I was having to steer the crap out of the car when it was getting upwards of 100 in the 1/8. Kinda weird but last time out I ended up putting both bags at 27lbs and removed the rear sway bar and on a 125 shot it went 6.62 at 106 spinning hard leaving with a 1.62 60ft it went the straightest it has ever went though. I personally thought it was a fluke, so i brought i back around and by this time is was late and there was alot of moisture on the track but it went 6.71 at 106 but straight as an arrow again on the top end. Just my experiences.

James

[2lucke4u]

James
were you hitting the juice on the launch?mine made a huge diff in 60ft time but marginal overall,went from 1.52 hitting 60ft out, to a 1.44 hitting it on the launch,also spun the tires on the rim a little, almost taking the valve stem off the tubes.
I was running 15 in pass rear but the air had gone out,did not find out untill we loaded the car to leave,it does have a rear sway bar,,have you been back to the track to try it again but with no air/low air? if you think you had to steer around a little add another 1/4 mile to that and 20mph,,wild ride to say the least,,my track time is over untill spring,I will start with bags at 15 pass rear and 10 drivers rear, and limiters on the front, to keep the wheels from dropping so far out of the wheel wells,also considering limiting the upward motion of the drivers rear,last years video of the cars launch reveals a huge gap over the tire [6 inches] on launch,and squat on passenger side which the bag will help,experimenting should get to the bottom of it,,if you remember the first time to the track with this combo 3 years ago we started at 12.50 motor and 11.7 on 100 shot,,same motor,same cam,diff heads only,lots of tuning, including some dyno time,and over 100 passes to sort it out,now we have 11.50 motor and 10.50 on 150 shot [only guessing @ 73 squared jets] ,,theres a lot to be said for testing and tuning,I,ve had some wild rides in the car and some pretty mundane,,the wildest was my last trip to the track when I got loose at around the 300 foot mark and hit the line for the other lane,saveing grace was I was against a 13 sec car, and I was on the bottle, I was a good 80 feet ahead of him,i got off it and coasted with him the the line,its these times we remember,,fun to say the least,,when we're in the pits after,,all is good,,
Charles

[rustorbust]

The nitrous wasnt actually coming on till right around the 60' mark cause the short times werent actually changing at all they were right about the same as when its on the motor. I had the geometry for the accelerator bracket all screwed up and I was having difficult activating the system out of the hole. But, I have been working on the car like a nut for the past week trying to get it all dialed in cause on the 7th pinks is coming to our local track and I want to have my shit right for it. So I have the 2 step on the car setup now so the bottle comes on as soon as the limiter is released. So yea.... I should definently get the car to leave on it now and im looking for 6.50's or better around 108. Im gonna put the 180 shot in it for this race too so.. well see what happens. I have had a couple scary times with the car now, they have this make shift race track here in San Diego in a parking lot and I have been taking the car down there for like 3 years now and when i got this motor in the car and started running the bottle on it I took it down there for the first time and in my first pass I ended up in the other lane....seriously bout shit my pants lol. I'll get back to you after this race and tell you how the car handles, I know they will have a real good prep on the track this time so there shouldnt be any excuses on my part and I can see really how the car is working with the different changes.

James

[rustorbust]

So.. I ran the car last night. I was able to make 3 passes. First pass I had the tire pressure to low and it was all over the place. Bumped the tire pressure up from 10 to 11 and then the last two passes were completely straight.
Best pass of the night was the last pass on the 180 shot
rt- .286
60ft- 1.467
330ft- 4.211
1/8 et- 6.504
1/8 mph- 108.147

[Fasterthansome]

Nice run rustorbust

My best 60' and straightest runs were at 12-15 psi

[2lucke4u]

nice job ruster
good hard launch,,,i noticed that your front wheels don't drop out of the wheel wells,,whats up,,do you have them limited?? let me know as mine drop out leaving 6-8 inches of clearance from top of tire to wheel well,,,again,,AWSOME run,,
Charles

[rustorbust]

What size tire are you running? Im running 165/15's and they sit pretty far up in the fender when the car is just sitting. There isnt really anything special with it. I dont have any limiters on it, its the s10 spindle and brake setup, factory 4 cylinder springs with the cheap rubber helper bushings. Thats pretty much it stock upper and lower A arms. A buddy of mine bought a picture of my car last night at the track, it was taken when I had just did the burn out and was sitting still purging the nitrous. I'll see if I can get it tomorrow and scan it and you can see how the car sits. Are you guys running tranny brakes? I have always foot braked the car but the fact that the car is now trapping 109mph is killing me cause I see so many other cars that are running like 6.20s or 6.30s at only 106 or 107. I ran a guy last night in like a 30s coupe of some sort (sbc, on the bottle, tranny brake, whole 9 yards, probably only weighs all of 2500lbs) and he left me out of the gate he had a 1.36 60ft to my 1.46. But I trapped 109 to his 106. I was def running him down just not enough track. So what do you guys think my car would pick up from putting a brake in it? Would it be worth it to set it up with one since the transmisison is gonna have to be gone through here pretty soon anyways?

[Fasterthansome]

I am still footbraking my Silver car. I cant put it all down early so I still footbrake. I dont like how hard it is on the drivetrain either. I leave on the first stage instead of a brake.
I also need all the front suspension travel I can get to help hook.

[DEMON Precision]

What size tire are you running? Im running 165/15's and they sit pretty far up in the fender when the car is just sitting. There isnt really anything special with it. I dont have any limiters on it, its the s10 spindle and brake setup, factory 4 cylinder springs with the cheap rubber helper bushings. Thats pretty much it stock upper and lower A arms. A buddy of mine bought a picture of my car last night at the track, it was taken when I had just did the burn out and was sitting still purging the nitrous. I'll see if I can get it tomorrow and scan it and you can see how the car sits. Are you guys running tranny brakes? I have always foot braked the car but the fact that the car is now trapping 109mph is killing me cause I see so many other cars that are running like 6.20s or 6.30s at only 106 or 107. I ran a guy last night in like a 30s coupe of some sort (sbc, on the bottle, tranny brake, whole 9 yards, probably only weighs all of 2500lbs) and he left me out of the gate he had a 1.36 60ft to my 1.46. But I trapped 109 to his 106. I was def running him down just not enough track. So what do you guys think my car would pick up from putting a brake in it? Would it be worth it to set it up with one since the transmisison is gonna have to be gone through here pretty soon anyways?

forget the brake and hit it with more bottle out of the hole , a bottle launch isn,t much different from a tbrake launch , as for footbraking my buddies blazer does 1.31 on the brake and 1.33/1/34 footbrake . as for your mph ya got some hp there my buddies best 1/8 is 6.11 at 111 mph he did that on a 9.66 pass in the 1/4 his 60 was a 1.31