According to the previous owners my truck ran a best ever of 12.7-12.8s


Tonight I couldn't get that.. should I be disappointed?

Track conditions was 90 degrees with 90% humidity. I never had any problem hooking up and was using 16" wheels with ET streets.

Here is my best time:

.905 reaction
1.899 60ft
5.522
8.508 8th @ 81.950

13.276 @ 103.705

I ran a bunch of 13.4s-13.5s @ 101-102mphs with 1.9xx 60fts.

Had a little trouble a few times.. One time I tried shifting myself and it went to 3rd and the motor died for a second then picked back up.. I ran a 13.4 on that one and might have been a 13.2 or better but since the motor died for a few tenths (boost dump?) I will never know.

What can I do to get in the 12s??

I had the 6# pulley on using the richest switch position. I wouldn't dare go any leaner as with the 6# the air/fuel stays in the yellow instead of in the green like the 4#.

All I really have in mods are an air filter (open conical), 6# pulley (tried the 4# today too.. was slower), and magnaflow cats with bassini mufflers - the rest stock.. no headers or anything.

Need recommendations on my next mod... would a throttle body help?? or MAF meter?

Thanks in advance

 

Don't be dissapointed, just wait for the cooler weather mod... 90 degrees kills these trucks... Wait and try running it in 40 degree weather, it will seam like a different truck.... You loose about a tenth for every 10 degrees, its not scientific but close....

PEacE....................
Jim

 

My best in the 'L' was a 12.68 on F-1's - 75 degrees, 40 % humidity.

Same track, 90 degrees, 90% humidity - I could only get a 13.1 and that was with Nitto's.

Bird

 

Very nice looking truck!

 

firstly, DO NOT try to shift the truck yourself, let it do its thing unless you just really want a new transmission

second, congrats on going to the track, not enough of us go and not as often as they should

shallow stage that puppy, which means that you need to just barely turn the stage bulb on... do not roll any farther than necessary. this will get you a "running start" at the starting line.

and lastly, you need to mash the gas just as that 3rd yellow comes on to avoid getting the yellow slip when racing much slower cars!

heat kills your times especially on supercharged or turbo'd engines. your times can vary from track to track depending on many things including the track itself.

 

Thanks for the replies

Did I mention I had about 3/4 tank of gas - which is about 20 gallons..

Did that take 2/10ths off my 1/4 or what?

We did a test run with my friend who weighs 200lbs and it made me go 3/10ths slower than my avg time.

How much does 20 gallons of Gas weigh??

 

I think the estimate for gasoline is 5lb per gallon. So 20 gal is like 100 lbs, theres a thenth right there if I'm correct.

My old camaro buddies said that roughtly 100lb taken off can get you a 1th in the 1/4 mile.

 

...also that kind of air doesnt help our trucks at all.

I hear towards Oct-Nov Lightnings really wake up.

 

rule of thumb is 100lbs is worth a tenth in the quarter. i thought gas was about 8lbs. 3/4th tank is probably a little less than 20 gallons.

don't run at the strip with less than 1/4th tank. i always shoot for about a half tank just to be safe. you don't want to run your pumps dry or starve her for fuel.

 

Water is 8 lbs. per gallon - gasoline is lighter than water. @ 72 degrees F it should weigh around 6.25 lbs. per gallon.

 

CONGRATS BRO

As said, heat kills the ET's, on a day like that you can leave a good 1/2 sec
on the table, plus that 60ft is killing you.

I'm going Sat and they're expecting 90's, sunny and humid
Kind of a wast of time as far as going for a number
BUT I WILL ANYWAY

 

Those times aren't bad for the conditions. I have similar mods and the best I have ran this summer is a 13.7 @ 101. Earlier this spring I ran faster stock than this just because of the weather. Just wait until the winter. That's when many of these guys get those really great numbers.

 

The only time I usually run in spring and fall..

PEacE...................
Jim

 

What can I do to improve my 60 ft.??

I was stalling as high as I could without moving forward.

while trying to stall up high a few times I actually went past the staging lights because my tires were hooking better than my brakes were grabbing.

What RPM is the stall on our truck stock?? I don't wanna stall too much because it might make the clutches in the trans. give instead of the tires (I wore out a few AOD transmissions on my stang stalling it up alot)

 

on the stock converter which is supposedly rated at around 1800 rpm stall, you need to flash it by just punching that bad boy from idle. this will result in your highest stall, i promise you. stalling it up (powerbraking) will cause it to stall at a lower RPM contrary to what may seem logical. of course on non-sticky tires you may not be able to just punch it, but something close to that off idle should still give you your best possibility of the highest possible stall.

some trucks stall higher than others as it depends on horsepower and weight to some degree as well as there is some variation between converters. for instance, my truck on sticky tires will not pull under a 1.90 60' no matter what. i'm on a 4lb lower, about 400rwhp or a bit less, hoosier qtp's... stomping it to the floor as hard and fast as i can. one of those factory stalls that just wasn't meant for the strip but it is the bomb on the street on street tires. so, i think if you leave from idle you will get better ETs due to reduced 60' however don't expect to get much better unless you're just one of those lucky folks with the freak factory converter.