Thread: P0171 16.4 ltft 20 stft

Originally Posted by BrandonHall10

Car seems to like it so far. FWIW, the car needed all kinds maintenance stuff when I got it. That being said, it has new plugs, wires, 255 fuel pump, fuel filter... Since converting I have done a couple WOT pulls and have had no knock. I would see a couple degrees on 91 with the same mods. The only other change is a drop in ambient temp, but not much.

Have you dropped any pulley sizes yet? Or were you still seeing knock with headers on a 3.8?
I have a 3.5 on my mps on a Gen v and I see about 2-3 degrees of knock wot. I was hoping e85 would kill that and allow me to drop a few.

Either way its cool that you don't have any knock with it and your car seems to like the corn. Do you think you gained any hp just from the switch? Besides from the extra timing from killing knock?

Originally Posted by chrsmi1

Have you dropped any pulley sizes yet? Or were you still seeing knock with headers on a 3.8?
I have a 3.5 on my mps on a Gen v and I see about 2-3 degrees of knock wot. I was hoping e85 would kill that and allow me to drop a few.

Either way its cool that you don't have any knock with it and your car seems to like the corn. Do you think you gained any hp just from the switch? Besides from the extra timing from killing knock?

Your pistons hate you.

Originally Posted by Slick2500

Your pistons hate you.

Yeah they probably do. They'll be alright. Car has less than 100k miles on it and i'll do the e85 switch soon and that should kill my knock. I don't drive it super hard so it's not that bad. I just hope it responds well to the switch.

And i had more knock then that stock, so.....