So I fixed the other problem and the truck runs great now.
I just recently bought some oem 20's and they look great!

I l knew that by going to the oem 20's it would slow me down a bit, maybe about 2-3 thenths of a second but I did not think it would be so drastic.

These are my trusted edge settings that have always garnerd me 0-60 in 7.4-7.6 seconds. 1/4 in 15.4-15.6@
35ft over sealevel.

WOT fuel: 1.60
advance: 1.00 for 93oct.
WOT shift: 5400,5400,4900
Shift firmness: 1-2=10,2-3=10,3-4=3
ratio: 3.55
tire: 2457

Someone told me the oem tire size was 2457????
is that correct?

Regardless I now do 0-60 in 9.08sec!!!!!!!!!
with a best of 8.96sec.
I wont even bother posting 1/4 times.

I figured I'd be high 7's or atleast 8. I know ive been spoiled by the G35 but I didn't think my truck was this slow. I don't remember it being this slow

Is this common for the trucks with oem 20's?

Give me a hand guys, an 04 chevy crewcab handed it to me today where regularly I would have a truck length or 2 on him.

Please help!!!!!

Thanks!!!

 

bump for a good guy

 

You should start by measuring the tires correctly. There are a number of ways to do this, search the threads you'll find em. I've read of guys marking the tire and the ground, and than drive forward untill the mark is at the ground again. Measure that and convert to Cm. I would not think the 20's would slow you down that much. Pics?

 

I dont have any pics but they are the oem 20's that are optional on lariats and kingranch.

 

are you sure you had the correct tire size when you ran the good times?

 

yeah i'm sure, the edge was accurate to the mile compared to 1 handheld gps and 1 dash mount gps all the way up to 100mph. Plus it had the stock KR 18's before.
I just dont have either gps anymore.