My 'bolt-on' 12 Second ET Recipe


Running a 12.9 with a nearly stock 5.0 is not as hard as it might sound. The main ingredients are: a fairly lightweight 5.0, a motor in good tune, the right mix of bolt-ons, slicks, and very aggresive driving.

Below is a list of mods, in no particular order, that I believe are capable of turning an average 5.0 into a 12 Second 1/4 miler. Keep in mind that this implies 12 Seconds on a drag strip, on slicks, not on the street on radials. Also, folks at a higher elevation will have a more difficult time breaking into the 12's:

- 26x8 Slicks

- 3.73 or 4.10 Gear

- Short accessory belt

- Off-road exhaust

- Headers (prefer long-tubes)

- Underdrive pulleys

- Remove the air silencer

- Ram-air/some sort of cold-air inflow, minimum K&N

- If a Mass-air car, a larger sensor

- 65mm TB with matching EGR plate

- Remove front swaybar

- Remove the clutch fan at the track

- Advance timing to approx 13 deg

- Good tune-up (new plugs, wires, rotor)

- Remove all loose items in car (spare tire, jack, etc)

-Courage. If you're scared of breaking it, you probably won't run the number!

The key to a 12 second ET with a near stock car is getting the car to launch hard and performing very fast shifts. Initially, launch the car around 5000 rpms. Do a hard power shift in all gears around 5200 on the stock tach. Cool the upper plenum with ice before a run, and push the car through the staging lanes as much as possible.

Some additional things that I would recommend include:

-Boxed upper/lower control arms with urethene bushings.

-Air bag in the passenger side rear spring.

-Move the battery to the trunk/hatch area

-Synthetic lubricants

-Pro 5.0 shifter

-Light-weight rims with skinnie front wheels/tires

-Remove any weight you feel you can do without

Some things I WOULD NOT BUY for a STOCK motor:

-"off-the-shelf" chips (ADS, Hypertech, etc)

-high-dollar spark plugs

-aftermarket ignition systems (2 steps are nice though)

-24# injectors

I can't stress how important it is to get the car to hook and launch hard. The 60 and 330 ft times are by far the most important. Work on the launch and shifting, the ET's will fall. I have personally seen several 5.0's run in the 12's with similar mods to what I have listed. In my opinion, there is nothing extraordinary about any of them, or my own.

If you like, e-mail me: bobcosby@***.net





not my car but again an article i found

 

this proves your points good article Quik

 

I think you are on to something, thanks for the info and good luck.

 

beeng doign research and found these articles. all this time i spoke what a stock car or fairly stock car can do. you dont need high dollar parts to go fast!!!!!!

it takes ***** and no care to what happens to the car

 

who is bob cosby , you or your pops?

i have talked w/ you guys b4 for some reason, either sold or bought parts.

anyways....yeah that sounds right on, and i think lean towads the 4.10's

the best i was able to get was 13.24 w/ not all of the stuff you mentioned....

stock motor, stock induction, w/ southsides, and et streets on 4.10's. lt's and offroad, skinnies up front and convo pro's all around.

best 60' of about 1.76

i think on full slicks w/ a 5k launch, i could have gotten 12.90's for sure.

if not then a 13.00... i actualy had a timeslip in my pics too



http://i3.photobucket.com/albums/y78...88timeslip.jpg

ugh! why don't image tags work on this site?

[IMG]local://upfiles/22951/9D5882D91C794C9086F595F7B84A025A.jpg[/IMG]

 

well first..there are a few holes in the story....granted I ran a 13.70 in a stock car....but a 12.90 nope. to 4.10 gears will slow the car down.....have seen many 13.55's.....but atleast 14 timing
here is what I did on my run 4 fun

engine stock...16 timing
no belt
syn fluids
removed shifter bushing and use a differents bolts removed all wt I could
waxed car with 3 coats
no air box but used a dryer hose to the bottom of the airdam
iced intake before run
removed front shocks and put in a wore out pair
by passed the coolant in the spacer
loosened the front sway bar
but a larger rubber in the left rear to load the suppension
used a 70 ser. tire on the front
drag radial in the rear
launched at 4500 shifting at 5400 using no clutch on the 1-2 shift
maf screen remove for move flow
polished the inside of the maf and t/b and intake opening...punched the convertors
used a tps from an automatic
removed front bumber shocks and fiber'glass

 

thats all stock there just mods to the stock parts

 

thats not me just a article i found from another site


just all tricks to go 12s on a stock car