Have any of you guys dynoed with 315's and then bolted on a stock set and run again? I just wonder if its worth my time & $$ to try it. I was with my last runs (see sig.) but if stockers would make a big diff. I may try it.

Thanks all, Mooseman

 

I've ran my truck with the 315's and the 265's at the track.

Not a huge difference, but noticable.

Quicker and faster with the stockers than the 35" tires.

(isn't quicker and faster the same thing? )

Only ran the Dyno with the 315's though.


phox

 

Well larger tires..

In simple physics, need more of the engines force to turn them than the "stock" tires do.. although they do look good, i would happen to agree that the extra weight, will affect your hp and tq numbers. smaller tires would give more RPMS, thus less work to turn tires and possibly give you better numbers than would the larger 35 inch tires you have now. A set of gears for ur rear diff might help you overcome that difference, but you will sacrifice top speed in the process.. Lower gears equal to higher engine RPMS.. simple example here through my experience..

4.10 gears with 235/85/16..... 60 MPH at 2000 RPMS on my past 93 F 250
3.54 gears with 285/75/16.....69 MPH at 2000 RPMS on my current ride
3.73 gears with 235/85/16.....71 mph at 2000 RPMS on a chevy gasser

Tryin to apply what i learned in physics in college.. hope it helps u a bit..

Tx

 

I'm wondering also. I was told that the tires will give higher torque numbers with bombed trucks, but HP suffers.
3.54 @2000rpm = 60mph 5th gear (perfect for towing!)

 

Not necessarily. Quicker = lower ET. Faster = Higher MPH.

I do not know enough about enertia dynos, but in a drag race, a smaller rear tire will give you a lower effective gear ratio (Higher numeric). If you have the traction, it should help you get off the line quicker. A larger diameter tire will give you a higher effective gear ratio (Lower numerically). Might help you on the top end with MPH.

 

I dynoed my truck with my 40s on at 370 hp. I am going to go back with some 32s or something too see if does anything because I can get it done for free and I have some new mods

 

Thanks for the info guys. It helps.



Let us know the diff. between the two when u git-r-done.

Thanks Mooseman