i don't think you will get very far into the 13's with your current setup. with a better tune and a posi you might get a 13.8

 

I think that is asking a lot to drop 3 seconds just from a blower install. I think people just expect a lot from FI. 10 PSI and a 2 core intercooler is pretty mild to me. Black Blown ran 12.9 with 12 psi, 3800 rpm stall, 700 less lbs, a much bigger intercooler, a waayy less restrictive exhaust, a probably much more overall gear (shorter tires and more ratio). I am running 3.73's with a 32" tall tire, he is 4.10 with a tire that is probably a couple of inches shorter. I would say all that adds up to more that 1 second, probably 1.5 seconds or so. Just the difference between the 2600 TB stall and a 3800 stall is probably 1/2 second or better on an ATI truck.
I ran close with a LT1 Vette(outran him in the 1/8th), beat a Saturn Ion redline, and lost to a guy I know with a 11 second Cobra. Overall that is pretty good I would say.

 

you might try iceing down your intercooler and head unit before your runs. that should help some. also the tb stall i think is only good to like 2400 so if you got a 3000 stall that would help a bunch. your exhasut is a ok the only thing better would be LT headers, magnaflows flow real good you can't get much better then them for a muffler. you for sure need another tune

 

Look at my mods in my sig and what I ran. The wieght was minus the tailgate I have 31-32" tall tires and without me in the truck so you should be a hell of alot faster than me. That run was the second run back to back in high 60* weather and about 70% humidity. You need to get that tune figured out or something out setups are close to the same and you have a supercharger and are only running to tenths faster something is wrong there. I ran a 15.9 with exhaust and a K&N drop-in filter. Dont run it in auto 4wd either you will screw up your t-case. It is trying to get the front and rear wheels rolling the same speed and it makes a big shock to the drivetrain when the front tires all the sudden kick in on a high traction surface.

 

Ahhhh, I wasn't aware of that. Thanks

 

I am not into the "tricks" to get it to run faster, like icing the intercooler or intake. I really dont want any bigger stall either. This stall flashes to about 2600 or so already, so I am fine with that. I have a 3k stall in my other truck, and wouldnt do it on my daily driver since it sees mostly city stop-and-go traffic. I am considering LT's, ORY, and probably true duals. I have no doubt that the magnaflow cat-back is good for a stock truck, but FI I think pushes its limits. It wasnt the best weather either yesterday, so you have to account for that. Everybody there was off. There was a headwind, and it was in the upper 70's when I got there. I dont know what the DA was, but I should find out. Add in the higher engine temp, as well as the fact that the whole intake and supercharger was heat sinked from driving 40 mins to get there. It only had about 15 minutes cool down in tech, and that was it. If it would have run a mid-14 followed by al lthe other times it wouldnt have made me happier. I want to know what it would run under normal conditions. I could throw on shorter tires, throw ice on the intercooler, add race gas, but I want to know what it will run when I am at a stop light.
I also have e-fans waiting to go on, and will probably do a colder thermostat. Maybe gut the cats. I would like 4.10's for sure.

 

in comparison a stock SS runs roughly in the area of what you just ran. they run between a 14.9-15.3 and spin both shafts all the time on 20's. i'd say your 5.3 is making roughly the same power as a stock LQ9 which would mean you gained about 50hp from your ati D1 install with the rest of your mods. (yes weight is also roughly the same as yours with a driver). i feel that with a good program in there you should be able to pull off a low 14's pass with ease. is your trans stock?

 

There is indeed something not ading up. You shoul dbe picking up roughly 20-25mph after the 1/8th mile.

It doesn't matter that you're a 4wd or not. I ran mine just like you stated and I always pick up at least 18mph-20mph N/A. With the turbo I was picking up about 23-25mph.

Here is an N/A slip for my bone stock RCSB 2wd 4.8L to compare 1/8th vs 1/4mile.

60' : 2.300
1/8th : 9.896
1/8th MPH : 71.9
1/4 : 15.29
1/4 MPH : 90.37 <... roughly 19mph higher than 1/8th MPH


Here are the last 3 runs on the Z71 before tearing it down. It weighed 5250lbs on this night and was run in 4wd the whole way:

RT: .433
60': 2.14
1/8th:8.41 @ 87.55mph
1/4: 12.92 @ 108.7mph

2nd run:

RT: .090
60': 1.80
1/8th: 7.88 @ 87.5mph
1/4: 12.40@ 108.1mph

Crawled under the truck and turn up the boost by 1psi (hard to tell)

3rd run:

RT: .042
60': 1.85
1/8th: 7.87 @ 87.88mph
1/4: 12.33 @ 110.0mph


So I wouldn't say that your problem is weight or gearing or any other lack of mods. The problem is in your tune or the blower kit itself. Picking up 10mph in the 1/4 isn't right for ANY truck regardless of weight. Well unless you sprung the parachute too early. :p

 

It was the damn chute!!

I was thinking I should have picked up more MPH also, that is why I mentioned it in my first post. I dont think that would account for more than a few 10ths though. I didnt think the 60fts were that bad for the mods I have really. I am really suprised to see some of the weights you guys are posting though. Aside from a tool kit (5-7 lbs maybe) I was in regular street trim. I see 4800, 5100, etc, where is all my weight coming from? Steps, hitch, cover, bedliner, stereo, etc.....I still dont see all of that adding up. Sure it is a EC and 4x4, but 800 lbs?? I believe the scale and my budies car weight was right on also.
For the first time out I dont think it was that bad. Maybe my truck is just a slug. It is deffinetly faster than it was before. When I compare my old g-tech runs to my new ones it is 1.7 seconds faster. I think that is a prett good pick up for just the blower install. The g-tech was within 2/10th of what the track was saying also, so even if it isnt completely acurate it is consistent.
With a proper tune and intercooler it will hit a low 14 Im sure. With the track tricks (no spare, bed cover, tail gate, tools, sub enclosure, iced intercooler, etc) it will probably get well into the 13's, but that isnt how I drive it.
When I see Black Blown running a 12.99 with all the mods he has- more stall, more boost, better intercooler, more stall, etc, I think a low 14, high 13 would be about right for my truck. I would love to run a 12, but I am willing to make compromises to keep it daily driven and liveable- I am only getting 12 mpg now(when I baby it 13.5)!!

Aside from the tune, intercooler, what would you guys change? I am thinking I will try a electric cutout. Its too bad nobody makes a ORY for these to fit stock exhaust, or do they?

 

my first trackday out only netted 16's sounds like you had a much better first day out than me