Most hp out of 7.3? Whats the max... 450hp? - Diesel Forum - TheDieselStop.com
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Upgrades and Aftermarket - 99 & up 7.3L Engine Upgrading or adding OEM or aftermarket equipment to your 1999-Up Super Duty or Excursion with 7.3L Power Stroke diesel engine. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.

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Old 07-26-2006, 12:38 AM   #1 (permalink)
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Most hp out of 7.3? Whats the max... 450hp?

Hey,
Ive been looking threw some diesel truck magazines and Im seeing all these duramaxs, cummings and powerstroke 6.0 over 500hp. But I didnt see one 7.3 over 450hp. Is it impossible, to expensive or the motor simply wont be able to take all the power? Trying to figure out what to get.

Thanks guys,
JR
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Old 07-26-2006, 12:44 AM   #2 (permalink)
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Re: Most hp out of 7.3? Whats the max... 450hp?

You must be new here. [img]/ubbthreads/images/graemlins/smokin.gif[/img]
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Old 07-26-2006, 12:46 AM   #3 (permalink)
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Re: Most hp out of 7.3? Whats the max... 450hp?

Oh yeah. Several of the guys on this forum are hitting well over 450 RWHP and a few are even beyond 600 RWHP. Search the forums for Brian Bunting (bbunting) and David Lott (powerstroke racer). These two guys (although not the only ones) are really laying down some serious horsepower with their 7.3's and they prove it by Pulling/Racing. David just went 11.12 in the quarter mile at 128 mph. It's fairly expensive but not terrible.
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1989 F-250 7.3 IDI N/A, 5 speed, no muffler. Injector Pump turned up 145*.
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Old 07-26-2006, 12:57 AM   #4 (permalink)
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Re: Most hp out of 7.3? Whats the max... 450hp?

You are correct. It is completely impossible. [img]/ubbthreads/images/graemlins/phoney.gif[/img]

We're gettin' pretty dang close to "the other" guy's numbers now. The rest of this year will be pretty interesting for the 7.3. And fyi, 450rwhp is a pretty standard and easily achievable number for the 7.3 now. I think I might be slightly over that number in my delicately driven ride. [img]/ubbthreads/images/graemlins/grin.gif[/img]
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Old 07-26-2006, 12:59 AM   #5 (permalink)
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Re: Most hp out of 7.3? Whats the max... 450hp?

thanks brett.

Gsx, I didnt know man. Do you know whats the stock hp on a 1999-2003 7.3 diesel? I heard auto is 250/ man is 275hp I got these numbers off fordtruckworld. Why would man. have more then auto. (if these numbers are right)

JR
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Old 07-26-2006, 01:00 AM   #6 (permalink)
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Re: Most hp out of 7.3? Whats the max... 450hp?

elms,
I added up some numbers of a air intake system, exhaust and a chip and it put me at around 470hp.

JR
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Old 07-26-2006, 01:00 AM   #7 (permalink)
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Re: Most hp out of 7.3? Whats the max... 450hp?

Good one Elmo. Oh by the way Tiresmoker. The numbers we usually talk about here are to the ground numbers (RWHP as in at the wheels). So if I said that my pickup is making 300 RWHP I'm probably making over 350 at the flywheel (due to powertrain parasitic loss).

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2001 F-250 Powerstroke, Automatic. Zoodad mod, Airaid filter, muffler delete, Boost fooler, Edge Evolution, Turbonetics 0.84 turbo. Best 14.88@88MPH, 314hp@617trq.

1989 F-250 7.3 IDI N/A, 5 speed, no muffler. Injector Pump turned up 145*.
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Old 07-26-2006, 01:07 AM   #8 (permalink)
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Re: Most hp out of 7.3? Whats the max... 450hp?

[ QUOTE ]
elms,
I added up some numbers of a air intake system, exhaust and a chip and it put me at around 470hp.

JR

[/ QUOTE ]

Wrong addition. [img]/ubbthreads/images/graemlins/crazy.gif[/img] A good chip, intake, and exhaust will give you around 310 - 340 rwhp. [img]/ubbthreads/images/graemlins/wink.gif[/img] And to be honest, that's a good bit if you take a ride in it. I'm assuming you're adding numbers off of the ad's? Most of the good sponsors on here will tell you what to really expect.

There's several members right now putting out well over 600rwhp.
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Old 07-26-2006, 01:11 AM   #9 (permalink)
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Re: Most hp out of 7.3? Whats the max... 450hp?

Depends on the year truck you get. Let us know what you're looking at and we can tell you alot more!

Turbo
Big Oil
Injectors
Intake
Exhaust
Chip
strength mods like replacing PMR's if you have them
I think with just the above you can get up in the neighborhood of 550hp. While the 7.3 may not have BIG HP #'s... their Torque #'s are [img]/ubbthreads/images/graemlins/laugh.gif[/img] That 550hp could easily put you near 1000ft/lbs.

But hey... all that I speak of is hearsay... I haven't done more then 2 of the above!
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Old 07-26-2006, 01:11 AM   #10 (permalink)
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Re: Most hp out of 7.3? Whats the max... 450hp?

Thanks for the correction. Those that afe stage II really adds up to 50hp? Cause that what could of thrown me off. I took 250 has a hp base line. Added 50hp for the AFE stage II another 10-15ish for an exhaust and about 140 for a custom chip at the max.

JR
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Old 07-26-2006, 01:15 AM   #11 (permalink)
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Re: Most hp out of 7.3? Whats the max... 450hp?

500 or lil over here
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Old 07-26-2006, 01:16 AM   #12 (permalink)
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Re: Most hp out of 7.3? Whats the max... 450hp?

Probably aren't gonna do 450 with just those mods but probably more like 300 RWHP (so about 350 flywheel ).

If you want 450 RWHP you're gonna want an upgraded fuel supply system, Injectors, and proabably a ball bearing turbo (if you want your turbo to last). Right guys???

Yes those stock numbers you found were right. Don't know why the difference between auto and manual though.
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2001 F-250 Powerstroke, Automatic. Zoodad mod, Airaid filter, muffler delete, Boost fooler, Edge Evolution, Turbonetics 0.84 turbo. Best 14.88@88MPH, 314hp@617trq.

1989 F-250 7.3 IDI N/A, 5 speed, no muffler. Injector Pump turned up 145*.
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Old 07-26-2006, 01:18 AM   #13 (permalink)
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Re: Most hp out of 7.3? Whats the max... 450hp?

main,
I was thinking of pretty simple stuff to start off with, like easy bolt-ons so get more power and maybe even better mpgs numbers. I was thinking airtake/exhaust/chip to start off with. I have no idea on the chip but I have an idea for the exhaust. Whats the best exhaust system? And what makes more hp... Straight pipes or aftermarket exhaust?

thanks,
JR
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Old 07-26-2006, 01:19 AM   #14 (permalink)
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Re: Most hp out of 7.3? Whats the max... 450hp?

brett,
The auto/man thing has me confuse also.

JR
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Old 07-26-2006, 01:24 AM   #15 (permalink)
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Re: Most hp out of 7.3? Whats the max... 450hp?

By a package from someone, like say DI Performance (Diesel Innovations) with chip, intake, exhaust, and gauges and set your goals/budget from there.
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Current Project: '86 Toyota regular cab, full tube chassis, fully built 7.3 Diesel Innovations Powerstroke engine and Terminator hpos
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