Is there any way to spin more rpm's on our 7.3's (and is it worth it?)
 

I know with the 12v cummins you can buy governor spring kits which will allow you to spin the motor from 3,000rpms to 4,000rpms, depending on which kit you buy. The stock 12v starts defueling at like 1800rpms and the automatics shift at 2200rpms... but with a larger gsk it allows them to fuel all the way up to 3k, 4k, even 5k.

Is there a way to spin the 7.3 out higher? And is it worth it (power wise) on these trucks?

Matt

Re: Is there any way to spin more rpm's on our 7.3's (and is it worth it?)
 

Get a chip and have them take the governor off.

I like the governor... it's a beautiful safety net.. the GSK is still a governor, it just governs the RPM's to a higher speed. Is there any performance to be had in a higher-spinning 7.3 though?

Re: Is there any way to spin more rpm's on our 7.3's (and is it worth it?)
 

Yea the real quick dump all ur oil through the hole in the block kind of performance. Lol
Most common diesels have a effective range where the amount of fuel, injector duration and timing can compress into power.

Anything much past 3 k on a stock motor is just waisting fuel decreasing engine life and robbing power. I will admit it is cool but leave it to the Cummins guys to blow stuff up.



sent from my rooted Evo cm7

blow what up? :D

Seems like hes doing a good job

Ya I got a really in-depth explanation over at the ORG on this. Basically the heads, cam, and heui are limiting these motors stock, but 4k rpms is doable with stock components.

Re: Is there any way to spin more rpm's on our 7.3's (and is it worth it?)
 

I sure hope someone close to this person let him know how pathetic his truck looks with those tailpipe stacks. I'm not convinced by some idiot overreving his engine that it works good for making power.

Lame find.

sent from my rooted Evo cm7

The ONLY thing that makes spinning the 7.3L NOT worth it is the HEUI injection system.

Sure, you can get a stock-injectored 7.3L to spin 5000 RPM but it will have ZERO power at that point. Power is fuel delivered over time; and TIME is something that the 7.3L injector does very inefficiently.


Oh, and as far as Frank's 7.3L in the video, it's been said time and time again that his reason for having those is SIMPLY for competition purposes (sled pulling/drag racing) to keep the smoke from "fogging" the lights and drowning the people in the stands.

Re: Is there any way to spin more rpm's on our 7.3's (and is it worth it?)
 

Ic most people do stacks in the bed not beside. Sorry if I affended any one by what I noticed as ODD

sent from my rooted Evo cm7

Lame find?! I was laughing my butt off at this creation :D I posted it as a "watch him try to blow this thing up" vid

Re: Is there any way to spin more rpm's on our 7.3's (and is it worth it?)
 

Ok yea I c how that was mentioned now. I thought u were backing up the claim that 5k was good or something.



sent from my rooted Evo cm7

That sounds pretty neat turning 5k




Is there a way to hop up the heui? Such as a better hpop (and lpop?), x-overs etc? How do you decrease the timing of the injectors?

Injectors that can put out more fuel in less time is the only way.

There is a very small window of opportunity to inject the fuel and the electronics have a specific amount of time to do it (less time as RPM increases). Take into account the relatively large "lag" time between the commanded start of injection and the time it actually takes for the injector to "open" and you have a recipe for a huge lack of high-RPM power production.

Man that ford has a unique sound!

it kinda sounded like a ricer. IMO. i cannot recall where i found it. (some ones website) but it was a mechanical injection pump for the 7.3 power stroke. it sat where the hpop would be. but they didn't have very much info on it. i'll see if i can find it again.

---AutoMerged DoublePost---

either that or it was one hell of a hpop.

My buddy showed me a commonrail kit for a 7.3 might be able to do it with that. But trying to push higher rpm's is asking for trouble I.M.O.

I think I've heard of that common rail kit... isn't it like $5,000? lol

i bet its A LOT more then that...

Or was the kit $25,000? I cant remember now but I recall there being a thread on it. It was something ridiculous that made you want to just go buy a NEW common rail psd, instead of retrofitting the 7.3

but is spending that much just so you can spin it faster and blow your rods further away worth it?

You dont upgrade the fueling system to spin a motor higher.. there's far greater advantages to it. And generally diesels can be spun much higher than stock, you just have to upgrade fueling.

ok. then more power? but diesels have more torque at lower RPM's,

Depends on what engine.


Spinning more rpm would increase the hp and get you down the track faster but the torque is what gets you off the line.

See below

Yes.



Rpm=power, I dont care how you look at it. Thats why hondas can produce such hi hp numbers at 7, 8, 9k rpms+... because you wind them out and they have no choice but to produce power. (We wont get into a torque discussion with them hehe)

A diesel, such as a v8 powerstroke, is designed (and capable...) of revving much higher, and therefore producing greater hp/tq numbers at higher rpms. Inline motors, like the cummins, typically dont like revving too much. They produce more power down low naturally, but again, increasing rpm's in them increases hp/torque.

i agree to a point. my pickup has the best power under 2700 RPM. after that it's a dog.

Here's a 6.4 at 5200. But they're not HEUI.

http://www.youtube.com/watch?v=B4JXbhSvF-U&feature=youtube_gdata_player

Sent from my Droid
Incredible 2 by HTC via Tapatalk.

Right.. with stock heui system, hpop, and fuel right? Upgrade the heui, hpop, and fuel and more rpms/power can be achieved.

Good video:tu:

Yeah that American Ride pulling truck is insane haha. BTW I think they make a p pump conversion for the 7.3!

Sent from my Droid
Incredible 2 by HTC via Tapatalk.

ya they probably do.. although it would be a HUGE pita.. probably FAR more than it's even worth