best nozzle for pmrs.

[CSIPSD]

in my case, i have a forged rod block, but needs a complete rebuild, so i had decided to hold on to it an work on it here and there untill a pmr lets go. im also moving a couple hours from No Limit and PHP so a live tune is what im looking at. May just go 180/100

Whats your HP goal?

 

[under pressure]

400 to 450 on a DD tune

Good power and light towing.
Its an 03, 149K on the clock. Its never had an issue other than tuning related.
A good tune for what I want should be fairly reliable.

 

[CSIPSD]

400 to 450 on a DD tune

Good power and light towing.
Its an 03, 149K on the clock. Its never had an issue other than tuning related.
A good tune for what I want should be fairly reliable.

400-450 is not going to happen on a DD tune on a PMR motor. Honestly, its not going to happen without the truck being a total maintance pig...

Your looking at 300cc of fuel to get a 450hp truck on a daily tune (assuming a 550-600hp all out...)...

 

[golfer]

400-450 is not going to happen on a DD tune on a PMR motor. Honestly, its not going to happen without the truck being a total maintance pig...

Your looking at 300cc of fuel to get a 450hp truck on a daily tune (assuming a 550-600hp all out...)...

eh?

I wouldn't read anything into this, other than he wants a 400-450hp daily driver.

 

[CSIPSD]

400 to 450 on a DD tune
Good power and light towing.
Its an 03, 149K on the clock. Its never had an issue other than tuning related.
A good tune for what I want should be fairly reliable.

eh?

I wouldn't read anything into this, other than he wants a 400-450hp daily driver.

I read on a DD tune, which in my mind is not your all out race/dyno/drag file. More along the lines of something you drive on every day.

If your looking for a 400-450hp truck, then 238/200 would get you there. Even a set of 180/100 will get you very close... If thats your end goal.

 

[under pressure]

here is my information basis,
beans dyno 160/100 in a DD tune on average see 400 ponies, and 450 all out, so 20cc more (180/100) could be in the neighborhood of 400/425 DD. Though Johnathans tunes are known to be a little stronger than others.
I keep seeing pulls on160/100s from 400 to 480.
*i have no need for an all out tune. Just a solid good running truck.

maintenance pig ?

 

[bruce]

do you plan on makin that with your pimped out stock turbo or are you gonna upgrade to a 38r?

 

[under pressure]

looking at a new turbo, yes. but ill see where the WW chokes at

 

[4.0l sahara]

200/200 I think you will be vary happy.

 

[under pressure]

those were my first choice initally, still looking through tune and nozzle info. as the 180/100 or 180/200 are the same price. i seen Swamps making 500+ on 200/200 so 425 should should be doable.

 

[4.0l sahara]

with a good live tune you would love it. The 200% nozzle is nothing to be afraid of.

 

[CSIPSD]

here is my information basis,
beans dyno 160/100 in a DD tune on average see 400 ponies, and 450 all out, so 20cc more (180/100) could be in the neighborhood of 400/425 DD. Though Johnathans tunes are known to be a little stronger than others.
I keep seeing pulls on160/100s from 400 to 480.
*i have no need for an all out tune. Just a solid good running truck.

maintenance pig ?

Lets clarify...

Beans tunes are known to dyno higher on there dyno... Not doubting, just stating facts.

450hp on a set of 160/100's is high...

450hp on a set of 180/100's is high...

 

[under pressure]

Lets clarify...

Beans tunes are known to dyno higher on there dyno... Not doubting, just stating facts.

450hp on a set of 160/100's is high...

450hp on a set of 180/100's is high...

I'll say 425 is a number i would like to see.
* canned tunes vs. live tunes, since im opting for a live tune for how i drive, we should be able to turn down the tq at the same hp level and keep the bottom end together.
live tune on pmrs just seems to be the better option.

 

[David N]

I did ~475ish to the wheels (550 motor) on a PMR bottom end for almost 2 years. That was with 250/100's and a 38R. Fuel system and built tranny, stock pushrods, valve springs, and head bolts. So you're goal of 450 is certainly doable.

Is it safe? Who knows. A couple weeks ago I would have said yes, but now, its very clear it can happen anytime, anywhere, and usually without any notice. Mine let go after driving 12 hours and 1000 miles away from home. So its a chance you'll just have to take, but Matt Robinson is who I would look at for tuning. But thats just me...

He tuned my truck, and yes it did let go. But it was after 40k miles of HARD HARD miles. The truck never came off the highest setting, and saw 40psi multiple times every single day.

 

[under pressure]

I did ~475ish to the wheels (550 motor) on a PMR bottom end for almost 2 years. That was with 250/100's and a 38R. Fuel system and built tranny, stock pushrods, valve springs, and head bolts. So you're goal of 450 is certainly doable.
.

what was the torque? im leaning to 425 DD as a goal, though its just a number, but if driveability is best @ 400ish on the street, well that would be just fine.

 

[David N]

what was the torque? im leaning to 425 DD as a goal, though its just a number, but if driveability is best @ 400ish on the street, well that would be just fine.

I never really was sure. I never had it dyno'd. That number is from track times and weight of the truck.

Matt always said 1000 ft/lbs of torque is where they break. So I'm assuming mine was right at 1000.

 

[under pressure]

Well, 425 / 750 tq would work getting dialed down.

 

[CurtisF]

i was assuming this, considering it doesnt take alot of fuel to burn 425 horses, the pw could be very short @ 3000 psi. i apprecite the insight, most know the bigger power trucks praise what an oversized nozzle can do in any situation. So i wanted to see the affects at a lower level.

i would believe egts on the 200 nozzle would be low as well.

My experience with the 200% nozzles has been drastically reduced EGT's. I have a stock-ish tune that I use for emissions testing that puts out about 240hp to the rear wheels. At WOT going uphill at 6,000 ft. elevation, I can just barely crack over 900* F on the pyro gauge. That's how cool they run.

My DD tune dyno'ed 310hp, about the same as a stock truck with a race tune. EGT's there at WOT won't even reach 1100 degrees. Again much cooler than you'll find on a stock truck running a race tune. I only use that tune as a fail safe when towing heavy in the mountains, but even then I rarely use it. Mostly it's for the wife when she is pulling trailers.

does some know the injection math to figure out PW. id be interested to see the PW differences between 100/200 nozzles. 170cc @ 3000psi ??

Depends on the injector. But let's say a 238cc hybrid as an example, and I'm just using rough examples here....

To reach say 425hp on that injector, you'll need around 2.75 ms of pulsewidth with a 100% nozzle at 3,000psi of ICP. Throw a 200% nozzle on there, and you'll cut it down to about 2ms with everything else being equal.

At say 3000 RPM's, that .75 ms difference translates roughly to almost 13 degrees of crank rotation.... assuming my math is correct on my fried brain.

Again, that's simply peak power. To make a PMR motor live, the fueling at lower RPM's needs to be controlled, as well as the fueling as you dive into the pedal.

 

[under pressure]

Thats some diff. From DD 310 to the 478. I assume that was on purpose ?
My DD dynoed 303 on a DJ.

Discussing peak power, I would assume I could make that beyond 2700 rpm with a 200 nozzle ???

 

[TyCorr]

So Curtis, are you going to start offering these tunes? If you can make a truck.run that cool and clean why not? I know you dont.want to blow anybodies truck up but isnt.that part of modding, its on you.