How much horsepower?

TyCorr · Mar 5, 2013

So who.can guess what a 275/200 will make maximum at 2-2.5ms pw? Im gonna run them with my 38r but realize Ive got too much fuel for the bb charger. So keeping things conservative what can I expect? Orrrrr what kind of pw will be required to.make 400-450hp?

DocBar · Mar 5, 2013

TyCorr said:
So who.can guess what a 275/200 will make maximum at 2-2.5ms pw? Im gonna run them with my 38r but realize Ive got too much fuel for the bb charger. So keeping things conservative what can I expect? Orrrrr what kind of pw will be required to.make 400-450hp?

I would say mid to high 500's. You're reaching the far outer edge of the 38R but with good tuning it could live. I can go 550-560 with the 250/100's but it's pushing the injector to the limit. The 200% nozzle should help with EGT's and overall driveability, depending on choice of tuner, and give a decent amount of HP increase.

Powerstroke Cowboy · Mar 5, 2013

2 to 2.5 is a good sized stretch with 200% nozzles...

TyCorr · Mar 5, 2013

Ok, then. What? Will those injectors fuel.enough for 450@ 1.8ms? 2ms is stretched out?

DocBar · Mar 5, 2013

TyCorr said:
Ok, then. What? Will those injectors fuel.enough for 450@ 1.8ms? 2ms is stretched out?

Sorry bud, I was thinking about what I got out of my similar set up. I have no idea what ms pw = hp.

TyCorr · Mar 5, 2013

I was.reacting to.David saying 2-2.5ms is a.stretch with 200% nozzles.

DocBar · Mar 5, 2013

TyCorr said:
I was.reacting to.David saying 2-2.5ms is a.stretch with 200% nozzles.

I have nothing to add with those parameters. No wonder my wife lets you photograph her nude. LOLI have injector knowledge envy!!!!!

Tim @ P.I.S. · Mar 6, 2013

Powerstroke Cowboy said:
2 to 2.5 is a good sized stretch with 200% nozzles...

Not quite sure I understand this statement? Can you better explain?

And with 3200psi hpo, 2.25ms/pw and 200% nozzles, "CAN" get you 230cc. This one I can recall of the top of my head. But just because you "can" doesn't mean you are. I have tore into a lot of injectors that won't.

Charles · Mar 6, 2013

lincolnlocker said:
ive prolly read it before but why is it you always say the dyno jet is the one to use? its not a load dyno is it? i thought that in order to be able to boost like on the street it needed to be loaded? ive been on a load dyno and a 248c, but when on the dj, i had leaking uppies and manifolds, and a torn boot... only hit 29lbs of boost and did 406 and on beans dyno with everything correctly running did 492 and hit 35lbs of boost. out in California i was on a superflow, with the boost leak and manifold leaks and did 404 with 32lbs of boost... all uncorrected numbers.. ive never had it at the track and im not arguing the numbers as i know anyone can make numbers different on different dynos. just curious is all?

live life full throttle

Only go to the inertia DJ and make an uncorrected pull if you want to know if your truck can spin a DJ roller as hard or harder than Joe Blow's truck.

Because the ONLY way you will post a higher uncorrected value, is if you put more power into that roller. There is no setting to be dicked with, and no way to make that line on the screen higher without pushing that roller harder.

If your sh*t won't light off..... then you won't make full power, and guess what, it will drive just as doggy on the street...

If you jump up on boost on the DJ, then you will jump up on boost on the street too.

My truck has always been SOOOOOOO far away from the point of actually making ____ boost on the dyno, that I just can't comprehend how sh*tty trucks must drive that can't get on boost. I mean, I will usually hit REGULATED boost before the pull is halfway through. I can hit ANY boost number you want on a DJ.

I wouldn't drive a truck on the street if it couldn't get on a charger any better than what you describe above. That's just a sorry ass excuse for a turbocharging system IMO.

But, to the point..... the DJ is not up for debate. The value you produce is the amount of power you put into the roller. And it will be as accurate from one side of the globe to the other, on any one of the bazillion of them out there.

If you want to make a comparative pull, just pick one of those bazillion Dynojets and see what you've got.

lincolnlocker · Mar 6, 2013

Charles said:
Only go to the inertia DJ and make an uncorrected pull if you want to know if your truck can spin a DJ roller as hard or harder than Joe Blow's truck.

Because the ONLY way you will post a higher uncorrected value, is if you put more power into that roller. There is no setting to be dicked with, and no way to make that line on the screen higher without pushing that roller harder.

If your sh*t won't light off..... then you won't make full power, and guess what, it will drive just as doggy on the street...

If you jump up on boost on the DJ, then you will jump up on boost on the street too.

My truck has always been SOOOOOOO far away from the point of actually making ____ boost on the dyno, that I just can't comprehend how sh*tty trucks must drive that can't get on boost. I mean, I will usually hit REGULATED boost before the pull is halfway through. I can hit ANY boost number you want on a DJ.

I wouldn't drive a truck on the street if it couldn't get on a charger any better than what you describe above. That's just a sorry ass excuse for a turbocharging system IMO.

But, to the point..... the DJ is not up for debate. The value you produce is the amount of power you put into the roller. And it will be as accurate from one side of the globe to the other, on any one of the bazillion of them out there.

If you want to make a comparative pull, just pick one of those bazillion Dynojets and see what you've got.

that makes sense to me now... its the weight of the drum and that is it correct? no parameters to change other then the setup in the truck to make it spin the drum quicker i presume?

live life full throttle

Chvyrkr · Mar 6, 2013

Tncoalroller88 said:
Hey dont be downin TN just because one dyno is generous.. I dynoed last July with 238/100s a t500 a 38R and DP tuning and i ran a solid 457 horsepower and 780 torque, so its not all in just the tennessee air lol. That was at the Riffraff East Event on a Dynojet, they wont be having the same dyno this year theyre usin No Limits Dyno. Than blows cuz iv got Gearhead Tunes a DI reg return and a new WW2 for the 38R. How bad off is his dyno in real terms? Iv talked to him personally and he seems like a legit guy..

How far it's off is why it's talked about.

But, it's not always on. My truck dyno'd low, a couple other guys I know dyno'd low, and some other guys I know/know of dyno'd high.

I've also seen a handful of trucks dyno right where they should be.

It's a load cell dyno. AKA, a tuning dyno. And it does the trick for that, no problem.

Powerstroke Cowboy · Mar 6, 2013

TyCorr said:
I was.reacting to.David saying 2-2.5ms is a.stretch with 200% nozzles.

Tim @ P.I.S. said:
Not quite sure I understand this statement? Can you better explain?

And with 3200psi hpo, 2.25ms/pw and 200% nozzles, "CAN" get you 230cc. This one I can recall of the top of my head. But just because you "can" doesn't mean you are. I have tore into a lot of injectors that won't.

Sorry guys I should have said what I meant to say a little better.
What i was meaning was.. From 2 to 2.5 MS of PW is a big stretch or distance with 200% nozzles. What I mean is there is a big change in the amount of fuel flowed from 2 MS to 2.5 MS.. That is all I meant no more no less..

TyCorr · Mar 7, 2013

Powerstroke Cowboy said:
Sorry guys I should have said what I meant to say a little better.
What i was meaning was.. From 2 to 2.5 MS of PW is a big stretch or distance with 200% nozzles. What I mean is there is a big change in the amount of fuel flowed from 2 MS to 2.5 MS.. That is all I meant no more no less..

Ok but that still doesnt explain anything. I asked a very specific question and all kidding aside I only was looking for a guideline.since I really dont know how much pw it would take to make, say 450hp. That was all I wanted to know. As Tim pointed out, ah, forget it......

Powerstroke Cowboy · Mar 7, 2013

TyCorr said:
Ok but that still doesnt explain anything. I asked a very specific question and all kidding aside I only was looking for a guideline.since I really dont know how much pw it would take to make, say 450hp. That was all I wanted to know. As Tim pointed out, ah, forget it......

Sorry for the misunderstanding... Did not mean to act like a jerk. I should have worded it differently...

Witht he right supporting mods you should get 450 with 2ms or less with 200% nozzles... That would be a guess off of what i have seen on flow sheets...
Some injectors are different though... Again sorry for the misunderstanding!

TyCorr · Mar 7, 2013

Right. But then often due to multiple things 2.5 isnt always as far as you might.think if.hpo or fuel.are iffy. In other words Tim hit what I.was alluding to on the head. I kinda wonder where the sweet spot was for.street driving. Honestly oil shouldnt be an issue with my brand.new srp1. Plus Ive.got a competition fuel system.

TyCorr · Mar 7, 2013

I just want it clean and 400ish hp.for now. Then Ill lean into it as durability is improved upon.

Charles · Mar 11, 2013

Watching on the scope you would be astonished at how hard a well tuned truck will pull sub 1.5ms of pw.

Right now (albeit 400% nozzles) I am running a max of 2.00ms of pulsewidth in my program and I have nothing but a single 15* OBS pump pulled from a wrecked truck for oil and this thing will blow the tires off for about as far as you care to keep correcting the wheel. And that's with ICP hovering around 2500psi.

neverkickn · Mar 11, 2013

Charles said:
Watching on the scope you would be astonished at how hard a well tuned truck will pull sub 1.5ms of pw.

Right now (albeit 400% nozzles) I am running a max of 2.00ms of pulsewidth in my program and I have nothing but a single 15* OBS pump pulled from a wrecked truck for oil and this thing will blow the tires off for about as far as you care to keep correcting the wheel. And that's with ICP hovering around 2500psi.

I am assuming that the crisp response has alot to do with how quick you bring the oil pressure up. Is that correct?

JoeDaddy · Mar 11, 2013

Charles said:
Watching on the scope you would be astonished at how hard a well tuned truck will pull sub 1.5ms of pw.

Right now (albeit 400% nozzles) I am running a max of 2.00ms of pulsewidth in my program and I have nothing but a single 15* OBS pump pulled from a wrecked truck for oil and this thing will blow the tires off for about as far as you care to keep correcting the wheel. And that's with ICP hovering around 2500psi.

Not to derail but I'm still learning. It's seems like you once said that it was the short window that gave you such a clean burn and good manners. I'm assuming that's why you keep going up in nozzle?

Charles · Mar 11, 2013

JoeDaddy said:
Not to derail but I'm still learning. It's seems like you once said that it was the short window that gave you such a clean burn and good manners. I'm assuming that's why you keep going up in nozzle?

Yep...

I've been looking for that point where the IP drop outweighs the injection rate gain. I'm still looking....

lol.

The 400's are notably less crisp than the 200's, timing/icp the same, but they still make much more absolute power, so obviously quantity injected per unit window is still king.