I ran a 13.63 @101.7

The only mod i have is borla exhaust
Brand new F1s with 32psi
Fiberglass bed cover, bed rug, trailor hitch and 3, 10 inch speakers


When i lowerd the tire pressure i ran a 13.7 @100.9 and a 14.1 at 100.7

Why was it slower with less tire pressure?
Thursday of next week i am getting the 4 pound lower and the chip from JDM.
what do you think i will run then?

my truck

 

Why was it slower with less tire pressure?

Did you let the engine cool off? Could have been heat soaked.




what do you think i will run then?

high 12s


FastFreddy

 

What were your 60 foot times... That will tell the tale...

Doug

 

I think it's great that your track is open this time of year. All our tracks here in Michigan don't open till next month!

 

Hey LumpyCamSVT

Welcome to the Forum, and Congrats
You've only just begun

 

60' times please.

And I think Fred the Lightning Bug, hit the nail on the head.

Good Luck in your quest for more speed, its never-endind. If the weather holds out (friggin rain) I hope to do some testing this weekend

 

1st run

R/T.......... .758 Temp. 54
Barometer 30.35
1/4.........13.6 @101.73

60'..........2.063

1/8..........8.79 @81.34




2nd run

R/T......... .473

1/4.........13.72 @100.91

60'..........2.128

1/8.........8.85 @81.08




3rd run

R/T........ .450

1/4...........14.10 @100.7

60'............2.278

1/8............9.25 @80.48

 

Because you are getting less of a contact patch on the F1's with less pressure. Although in all of my runs with F1's I have found that 28 psi works best. It also depends on how you launch, track conditions, etc.

 

That 2.0 60' is pretty good for E-Town. Especially this early in the Season (cold).

Drop down to 28PSI like YYSENHIMER said and you may see some sub 2.xx 60s. That'll knock a couple tenths off your ET.

Good luck.