That’s still over 200 crank hp, and almost 50hp more than you’re giving an na engine credit for.
Yes, you are right. You will notice that the same day(same post), a stock N/A made the same... 125... that I rate a N/A IDI at.
If you saw the videos of it na, it cleaned up the 90cc pump pretty well, got good mpg and had very manageable egts.
He's also only hauling a <5K bronco around, not a 6.5K truck, plus optional trailer.
When you don't need to put any fuel into the motor(due to less work needing to be done), you get both of those.
Dynos are ******* diesels, most the time you end up with smokey runs that don’t equate to what they make on the street, and you have to play with the setup to favor the dyno.
in the post you quoted he says it would have made more if it were adjusted for the dyno.
I've seen this, but I don't see why it would make any difference N/A. Turbo, there's a difference, if you can't get the turbo to spool quickly enough. N/A, the air you have is the air you have.
As for the water ****, that’s going to help with egts some but it’s mostly a fuel, so for that na engine it likely wasn’t adding any power.
It also cools the charge air, which makes a density difference. Doing some random numbers, at 120F and, say 20% humidity, that's .06833 lbs/cubic foot. Add water evaporating, lets say it drops the charge air to 80F and 100% humidity - thats .07256 lbs/cubic foot, or 6% increase in oxygen. Now, I'm not sure exactly what the real numbers would be, but it's something that Banks sure takes into account when considering how to shove more air into a motor to make more power.
And since when does a dyno number not count just because it was smokey? If you’ve ever been to a competitive diesel event that is the norm, and for most the 12v guys the amount of smoke he showed in the videos would be normal for a completely stock truck.
IMHO, if you can't tow with it, the numbers are just for show. And yes, I've seen a lot of poorly-tuned rigs on competition at H4H. I've also seen multiple properly-tuned rigs making good numbers as well. Those are the more interesting rigs.
Sure smoke isn’t ideal, but that doesn’t mean the data doesn’t count and that the truck isn’t driveable, your right foot controls the fuel, you just have to pay attention to it when you’re driving.
No, but if you have to take your foot out of it, guess what... you aren't making the same power as WOT. So that power is not there anymore - not usable.
In the end, it's still Enginerd's truck and money. He'd like to try to build some headers to get a little bit more power out of it for less that the cost of a new turbo kit. Let's just concentrate on trying to help him out.
I don't have a problem with that; I'm just saying that physics doesn't lie. By all means - do whatever you want. But don't expect to get some magical number.
I've gone the route of trying to tune and get power out of a N/A IDI and basically didn't get any noticeable difference.. I then slapped a used, $500 turbo kit on it in one weekend and made double the power(after cranking the IP). It was pretty much an outlook-changing moment for me.
I'm looking here and thinking that the mods to make a smokey 170HP are far more involved and costly than a simple used turbo kit, that can cost $5-700.
Once again, my truck in N/A form works fine for me. If I didn't like to go to high elevations in Colorado occasionally, I wouldn't bother with a turbo at all. Just for the record, it runs very well from the 2200 feet where I live clear out to the Front Range that can be from 5000-6000 feet. That's just with headers.
If you ever are in my neck of the woods, I invite you to drive one of my trucks. I can pretty much tell you that you will want a turbo after that.
I will say that I've seen and driven poorly-tuned IDIT trucks that couldn't get out of their own way - if the timing or the fuel isn't right, you won't make power.
Just a little tuning, though, and it's a night and day difference. And, if you do get the turbo all set up, and it doesn't feel as strong as I say it is, I'm more than willing to offer advice on getting it dialed in.