is this the mustang or the truck?

 

i was under the impression it is a truck motor in a mustang

 

Correct!

 

Yeah he was lean in the lower RPMS's, but 14-15 a/f is normal for a N/A engines

 

Thats a funny right?? cause you dont just double it-fwiw my truck traps 77 in the 1/8 and I dont think I have quite hit 160 in the 1/4 yet

 

Correct. I still have a drag car and I do understand how it works. I posted that and have been waiting for someone to say something. Best I have ever been is 11:39 at 119.97 mph in my mustang. All motor. Just a tad lighter than our trucks.

 

haha ok for a sec there I thought you were as naive as ManualF150!

 

13.5:1 is the best a/f for power.

79 in the 1/8th is around 96 in the 1/4.
9.13 is around 14.1 in the 1/4.


At the max torque point(4267) the a/f was 17.1:1. 3.5 points below optimal for power.

And at 5200 it was 16.10:1 hardly normal. unless burning pistons is normal.

there's 30+hp/tq in the A/F alone.

 

In Naturally Aspirated engines powered by octane, maximum power is frequently reached at AFRs ranging from 12.5 - 13.3:1 or λ of 0.85 - 0.90.


For gasoline fuel, the stoichiometric air/fuel mixture is approximately 14.7 times the mass of air to fuel. Any mixture less than 14.7 to 1 is considered to be a rich mixture, any more than 14.7 to 1 is a lean mixture - given perfect (ideal) "test" fuel (gasoline consisting of solely n-heptane and iso-octane)

what i am getting at is not a knock of FATHERFORD. 15:1 is certainly ok. but 16:1 - 18:1 was just a hotspot away from a burn exhaust valve. if you guys could have seen the O2 wideband and the stainless mufflers i use, they are burnished from the heat. the SS has broken and brittled from heat.


well it's fixed now. track friday night.

 

I'm not saying it's the best for power, just saying it's not unherad of in factory vehicles. My old place of business was make a hemi nitrous kit for the trucks. 100% bone stock truck not spraying was doing nearly 16:1 a/f at WOT