I just bought a 2007 silvrado with a 4.8 in it . It is a regular cab short bed . Does any one know what this will run in stock form. I thought the 4.8 was a dog but this truck feels like it pulls pretty hard.

 

I'm not sure but i'd be interested to know so heres a bump for you

 

bone stock with oem 3.73s i seen thm run high 15s low 16s depending on weather track prep and many other factors

 

Do you know if the 4.8 in the 2007's have more power the the older ones because my freind has the same truck but a 2004 it it feels way weeker than mine.

 

the new 4.8 is rated at 295 horse, where i think the old was around 275ish?

the main difference i can see over my brothers 2004 is the electric fans, which would technically free up around 10-15 crank horsepower....which is where they rate them at. other than that....i dont know? i think the heads have a different casting number as well, but i dont know the difference on the internals of the heads/valvetrain.

they are a bit stronger though, but......what does the new body style weigh compared to the old?? who knows?

 

Have you ran your truck at the track? What were the times?

 

yes i have.
bone stock with 20's... 3.23 gears, single wheel traction 10.50 in the 1/8th
after TC and tune, and CAI......same 20's.....same rear... 9.38 in the 1/8th
i have a 212/218 cam going in saturday, then back to the track. i am gonna pull the spare and the tailgate, and i bet you money i will run a high 8.

i like to run every time i add something, just to make sure i am going in the right direction.

 

Let me know how it does. I'll try to take mine to the track sunday. I just bought mine last Thurs. W/ 94 miles on it. Today I put a K&N CAI and 2 inch drop shakles in the rear to level the truck out. I also put a tonneu cover on it. The truck came with the 20's that came on the Tahoe's.

 

i will man.

i say i should hit 8.8x-8.9x with no problems, if the truck hooks. the TC and tune really created traction issues.....as it now flashes to 2600 on the footbrake. when i remove the spare/tailgate....it will surely be worse, especially with the cam and greater torque output.

and i put on the s & b CAI, so i could later hide a dry nitrous setup in the airbox. i am tryin not to void the warranty if i can.

 

I forgot , I have a nitrous works wet kit for mine when I get a few more miles on the truck first. I'll try to post some pics of my truck tomorrow.