Performance poll, any suggestions

[notchsleeper80]

I have a 94 f 350 dually. so far I have removed the back pressure valve, installed 3" downpipe, converted to electronic fuel pump, diy intake with fleet filter, and have an edge evolution tuner. I noticed the other day while messing around on the street with my brother in his 99 f350, his truck is quite a bit more powerful than mine. I know his has a newer design, but all he has done is a diy intake. no tuner, stock dp, and same exhaust as me. but his truck will run me down every time. mines making about 18 psi at full throttle just before shifts. Just want to see if anyone has close to the same mods as me, and what boost they are making. This thing wont even spin a tire no matter how much i spool it up. It will in the rain but what truck wont, lol. Any thoughts or comments are greatly appreciated.

[erics diesel]

being a 94 is yours a psd or an idi?

[jesilvas]

As long as he has a late build truck, he's got bigger injectors, bigger oil, better tuning on the PCM, an intercooler, and probably more, but that's all I got right now.
I'd think it's a PSD, since you're reading boost.
You might be able to make a tad more boost, but I bet not a whole ton more.

[erics diesel]

can't you read boost on a factory turboed idi though?

[1Dieselman]

Do the 140v idm mod and 1.0 turbo housing. Check for exhaust leaks between exhaust manifolds and turbo. If that edge evo is any good you should be getting around 25 lbs of boost. Only other thing that comes to mind is what gears and what size tires are you running?

[jesilvas]

Yea, I forgot they turboed the IDIs for a year and a half.

[notchsleeper80]

it is a powerstroke, i fixed all the exhaust leaks when i got it, and it does have the idm mod done as well, forgot to list that. but i also noticed on the boost guage, anything past around 7 psi it starts fluttering the guage pretty bad, but peaks right at 18. just wondering if thats about the average boost i should get with those mods. i know its getting enough fuel since i have a good haze of black smoke all the way through the rpm range

[notchsleeper80]

how much boost should i see with the 1.0 housing. And i know the edge is good because the truck is a real slug without it. the tires and 3.55 gears are all stock.

[1Dieselman]

The 1.0 housing wont necessarily give you more boost it will give you boost sooner. You might want to check that gauge or try a different one, with the mods I have and a old style 60 hp superchip I get 27lbs of boost and you should be somewhere in that neighborhood.

[351fifty]

i hit around 30 something psi, but i have custom tunes, my last 97 super cab would run rite at about 25-27 psi of boost on the edge programmer, and loads of smoke would pour out my stacks, btw just kause you leave a haze doesnt mean your getting enough fuel, i could cover the highway with that edge and single shots, you should go for custom tunes and bigger sticks, and hair dryer to get more power lol, but x2 on the housing kause that should put you in your boost level faster