z28camaro1090

So I went down to Cecil County Dragway tonight for opening night. Haven't raced there since 2010. In 2010 before my tune my times were as follows

60' 2.118
300' 5.706
1/8 8.603
MPH 85.35
1000' 11.083
1/4 mile 13.18
MPH 107.88

Tonight the track prep was bad being the first night, but after a tune picking up almost 30hp 30 tq I would have expected higher trap spd atleast. But the two best times tonight were

60' 2.481
300' 6.115
1/8 8.993
MPH 85.93
1000' 11.467
1/4 mile 13.556
MPH 108.13

and

60' 2.456
300' 6.146
1/8 9.059
MPH 85.15
1000' 11.547
1/4 mile 13.645
MPH 107.88

The second run I had to let out of it at about 70Ft due to car slipping sideways alittle.

But what is the car capable of? Also, do those gain sound right being what I did before tune and now? I also added a SSRA with the tune. The da difference between the nights was -870 the first night and tonight -80 to -130.

I know I have to get the 60 down. I am looking at lca's with relo and shocks. I guess I'm mostly frustrated not seeing more up top thought id get over 110 trap

Zlow28

iTrader: (11)

thats a pretty big DA difference, also seems like you forgot how to launch well lol. How many miles did you add since 2010? maintenance can also affect you more than you think.

z28camaro1090

This is my third car so maybe 5k. I bought the car with 115k on it 5 years ago. Now it just turned 137k, I believe it had 130 - 132k in 2010. The track was crappy tonight because it was the first night. There were alot of people not pulling good 60ft. But I thought I would see a noticable improvement in trap with the tune and SSRA

1999CamaroSS

What type of tires are you running and what shape are they in?

z28camaro1090

Summitomo's they are pretty old prolly about half tread left on them.. Same ones I ran before but they had alittle more tread and werent as old. Although the car is stored in a garage so they dont appear to be dry rotted

z28camaro1090

Ultimately shouldn't my Trap be higher though? Which the not hooking wouldn't concern me as much cause that's an easy fix I am more concerned why the car is not faster now then before as far as trap

1999CamaroSS

I can see what you mean, but your trap speed is pretty much the exact same as your old run where all of your other times are slower up until the end of the line. This tells me that if you had hooked the exact same way that you did off of the line the first time, your 1/4 time would be higher (and also your trap speed). You have to put all of those numbers in your head and think of it as a linear graph (like a dyno graph); its pretty clear that your issue is coming down to TRACTION. Those tires are complete garbage, and even if they were in the exact same condition as they were on your original run, you probably wouldn't have done much better. The tires were more than likely already beyond their limits with your original RWHP numbers; adding power to those tires won't help your cause. Get some GOOD tires and go back to the track, I promise you will be VERY happy with your numbers.

Blackpanther99

iTrader: (8)

Those tires try upgrading your suspension up a bit as well and then you will see those gains.

s346k

iTrader: (4)

what did the car dyno before? i'd expect a 30/30 gain to pick up quite a bit on a stock car. i'd also be expecting 110+ traps, as well...especially in the DA.

z28camaro1090

Yeah I guess you guys are right. So your saying with a 2.1 60ft time like on my original run I would have had a higher trap and prolly cut into the 12's? Other thing I had a run before that , my first run that had a 3.5 60ft. I mashed the gas and spun hard all the way past the 60ft line until I let off. I mean I can feel the car is considerably faster just from messing around on the street. Now the car will burnout till I let off the gas. The car before the tune dyno'd 293rwhp and 303rwtq. I think the numbers were actually closer to 300rwhp and 310rwtq, because the tuner said there was a few codes that were making the engine detune itself. As for mods, I am thinking about picking up a set of lakewood 50/50 drag shocks, relobrackets and lca.Also, looking at a torque arm but Id rather do the suspension in steps. Also, I might see if I can borrow a set of drag radials for a few runs from someone. As I only go to the track once in a blue moon and buying a set makes little to no sense.
http://www.flickr.com/photos/9369841...in/photostream

murphinator

iTrader: (2)

700 foot worse DA and your trap stayed the same , DA is huge on making power , making power is what increases traps. go again with -800 da and then you would have a fair comparison.

If then you still feel trap is off look at if you have more worn tune up parts in place since 2 years ago.

do you have dyno curves for before and after ? did it just gain a peak number or was the power under the curve up across the board. 30hp increase sounds great but if the increase was only affecting a narrow portion of the powerband and not the whole thing then you will see less gain than if it was up 20hp everywhere

z28camaro1090

Here is the dyno graph. As you can see the conditions got hotter and lower barometric pressure from first run to the last and the car made alot more power. As far as tune up parts I have new plugs and wires sitting I guess I should consider putting them on. Only other things I did besides is I put a paper filter back in over a KN which that shouldn't make a difference and I went back to a stock mass air cause the guy I bought the car from had a SLP which causes nothing but problems

z28camaro1090

http://www.flickr.com/photos/9369841...in/photostream

DYNO SHEET

Doug G

I agree with the above about the DA.
We see pretty decent DA's at Cecil from time to time...but it's not the norm at almost -1000'.

Now as for your ET's...you lost .4-.5 in your 60'....so you gave up, up to a full second better 1/4 ET.

z28camaro1090

Wow. I didn't realize that .4-.5 doubled on the 60' is what I gave up on the 1/4 .8- 1.0 seconds. That means I should have ran 12.5 to 12.8 if I could have replicated the last time I was at the track 60' time. Not to mention someone above was saying I would have had a higher trap if I hooked up better.

I am ordering Founders suspension package with the panhard bar and LCA and a subframe connectors. Also, im going to pick up some better tires and Lakewood 50/50 shocks on the back. I was figuring with that id be able to cut 1.8's which would most likely get me in the low 12's am I correct? Plus a tune up which I am not sure when that was done last.

Doug G

Spinning skews the MPH (shows up faster)

For every .1 better 60' it comes out to about .2-.3 better in the 1/4

I was ...
13.2's at 103
12.3's at 110
11.6-8's at 115
11.3's 118-119
...................for a reference.

spicebird98

iTrader: (10)

hey man, forget about the suspension upgrades.. you arent going to know where you are at until you put a good tire on there. Go buy a set of 255/50-16 Toyo TQ's.. they are cheap and super soft so you will have no problem hooking. 1.90 60' here everytime with similar mods...

z28camaro1090

Wow I never realized that .1 in the 60ft was that much.. Thanks for the examples of times and traps? What were you running in each stage? Also, I think I am gonna pick up the tires first. I need new tires anyway so I might as well get them first. I did just replace my fronts about 3k ago cause they were so worn. What did the toyo's run?

Doug G

I'd have to go through my old slips...And you may want to get another set of wheels for the sticky tires and run them only on track days since using them for regular DD duties will ware them out quick.

z28camaro1090

I was thinking about doing that..I just have to find somewhere to get 2 wheels at a reasonable price.