450/400 7.3 2001

DSR12004 · Apr 2, 2015

I am building my 7.3 up for drag racing and daily street driving, motors completely built, block filled, bed plate, billet rods, coated pistons, ported polished heads, headers, studs ect, s475 turbo, now I'm down to injectors, I want the most horsepower I can get out of it while still being reliable and I do not want to spray it, I would very much appreciate any input. I would like to put 450/400 in or should I stick with 350/200 or 300/200.
My horsepower goal is a 700 hp daily driver and ironically I drive about 700 plus miles a week,

Let's hear your thoughts...

Magnum PD · Apr 2, 2015

Was told 450's aren't that much better than regular 400's. 400/400's aren't DD friendly also.

DSR12004 · Apr 2, 2015

I'm not worried about them being a little smoky or laggy, my main concern is the nozzle cracking issue I hear about, is this common or what?

Magnum PD · Apr 2, 2015

Kinda rare. Find a good builder for your injectors.

DSR12004 · Apr 2, 2015

Who would you recommend? I was thinking Unlimited Diesel

02BigD · Apr 2, 2015

unlimited is a great choice.

lincolnlocker · Apr 2, 2015

whs^^^^

swamps, pis, ff.. other good choices. if they all make them that big. lol

live life full throttle

David N · Apr 2, 2015

700 miles a week in a 700 hp truck? Its doable... But I wouldn't rely on it too heavily...

Magnum PD · Apr 2, 2015

Be better to get a gas saver DD.

7.3psd97444 · Apr 2, 2015

700 miles a week in a 700hp fuel only 7.3?
Sounds fun...

DSR12004 · Apr 3, 2015

Thank you all for your input so far keep your thoughts and comments coming...

lincolnlocker · Apr 3, 2015

David N said:
700 miles a week in a 700 hp truck? Its doable... But I wouldn't rely on it too heavily...

depending on his driving habbits... we all know it wouldn't work for someone like me but who knows about him...

live life full throttle

bruce · Apr 3, 2015

I'd call swamps. If you truly want 700 I don't think 200% nozzles will cut it, not without juice anyway. I couldn't imagine driving anything 700 miles a week.

Tim @ P.I.S. · Apr 3, 2015

My experience with 300/200's is mid 600's on fuel 800's with spray.
400% nozzles are not a problem. Have several running around in daily drivers.

m j · Apr 3, 2015

Tim @ P.I.S. said:
My experience with 300/200's is mid 600's on fuel 800's with spray.
400% nozzles are not a problem. Have several running around in daily drivers.

you had to say that. now I need twin pumps to feed 400s for my daily build

gwunter · Apr 3, 2015

Yea, I thought I read of several guys on here running 400s for DDs and they are acceptable. But of course its all in the tuning they say.

bruce · Apr 3, 2015

Where are you gonna take it to get tuned? Can you self tune?

thuglike · Apr 3, 2015

Totally doable. a 300/200 with proper lung will get you there.

Twin Termies and all the supporting mods.

TUNING is key..my DD tune dyno'd at 477..totally smoke free, smooth and quiet.
My race tune dyno'd at 706 and ran 12.21 @ 111 and change and was a complete animal throughout the rpm range. It smoked....a lil bit...ok alot..not a great dd tune for that reason.

But with than amount of fuel you obviously need the air as well, this is where tuning will come in.
It's not just altering fuel tables, it's icp, timing delay, shift points a whole lot of fine tuning.