Choose1

iTrader: (16)

Took my C5 to the track for the first time last night and I'm not too happy.
I was only able to make 1 run due to a MAF problem after the first. It was my first time launching the car and I had a lot of wheel hop and a crappy 60' so I'd like some opinions on what I should be close to with a better launch.

60'--2.220
1/4 mile--13.018 @116mph

mrbigjeep

mods??? i assume a bit is done to have that trap speed. if that slip is right then you have 11's no prob.

but even with that sixty foot it seems you would still be a bit lower. i mean its bad but not that bad. def. has more in it though

Choose1

iTrader: (16)

I sure hope it has more in it. This is my "FIRST" engine build so I'm just happy it runs!

MODS: Forged Rods/Pistons 348; MS3; Ported 58cc 5.3 heads; Comp 1.75 rockers; ls6 intake; bbk 80mm TB; obx lt's-no cats; M6; stock susp on toyo DR's

Taken into account the car is a convertable, I believe around 3,800lbs, I would still like to see high 11's/Low 12's. Am I expecting too much?

I am Unable to scan my slip right now but here is what it reads:

I1 : 2.220
I2 : 5.742
I3 : 8.587
MPH (I3): 86.257

ET : 13.018
MPH : 116.331

I plan on taking it back to the track this weekend and will surely share my results.

mrbigjeep

yeah you must have had some trouble on the first half of the track cause you picked up big mph...30mph pickup

get a better tire that will hook and go back. you easily have the low 12's/high 11's you are hoping for. i wouldn't worry

btw, even with your vette being a vert you shouldn't be anywhere near 3800 lbs

it seems you would trap quite a bit more than 116 as well being that you trapped that even having just a subpar eighth mile

Villain281H

iTrader: (5)

Agreed on everything stated here. The car should be in the 11s with a good launch. If the car doesn't have a good tune done to it (dyno and driveability), I'd do that before pounding it out at the track more.
Once that's squared away, practice and a set of sticky tires will help a ton.

Good luck!

Derek

Choose1

iTrader: (16)

Yeah, I didn't think a C5 Vert weighed that much either, but the sticker on the door says 3,709lbs.

mrbigjeep

i believe that weight is fully loaded...meaning full tank of gas, two passengers and even luggage/cargo as well.

curb weight is still under 3300

98Z28CobraKiller

iTrader: (17)

It looks like you were peddling the first half. The car is making power and it probably has another 2 mph in it. Now you need a drag radial. Unfortunately, that's going to be hard on the IRS and the clutch. Then it'll be hard on the trans. This is how the cost of a good ET climbs quickly.

Choose1

iTrader: (16)

Yeah it said 3,709lbs-GVWR so 3,300 makes sense.

I actually do have Toyo proxes 295/??/19 drag radials. I'm currently running a centerforce dual friction clutch but can def understand how expensive it can/will get. Any suggested tire pressures for these dr's

dannyz

Last friday at the test and tune, my friend Jim, in a 1999 C5 w/a manual trans did three 13.01-13.05 runs back to back, trapping at 112-114 mph each time.
60' was a consistant 2.02-2.04.
I would say you are about dead on. [ vette is stock]

Choose1

iTrader: (16)

Alright, I went back to the track last night and after a few trial and error runs I have gained some improvement.

These were my last two runs of the evening:

60ft-2.228
1/4-12.755 @ 117.8mph

60ft-2.194
1/4-12.613 @ 117.8mph

With these new times I am a lil more satisfied with the car. I am still spinning the tires more then I would like off the line but with some practice I am hoping to reduce the 60' and get into the low 12's

JFM-jr

iTrader: (23)

Your MPH indicates you are a full second shortchanged in ET. That car can go mid-high 11's

Choose1

iTrader: (16)

Heading to the track in a couple hours, will post results. Looking for low 12's, hoping for high 11's!
Anyone know where I can get that infamous "Driver Mod"?

dannyz

Your 60' is pretty much the same as your 13 flat pass, you only gained 1 mph in your trap, yet you dropped to a 12.75 1/4?

DREAMZ28

iTrader: (1)

Something weird is definetly going on with this car/driving.

Are your shifts dead on each pass, or are you shifting at different points, or even missing some?

Dropping 4 tenths and gaining 1 mph while having about the same 60 is deff not normal. I would first think of shifting being way different but something still seems off... Cant pinpoint it..

Just get it dialed in with some nice and sticky tires, possibly a 2 step if your ballsy enough and then lets see whats going on.