got honed 100 hp

[betterthanstock]

I was at Dyno-mite a couple days ago, and honed my stockers to 26. 5 liters/minute (on air @ 50psi). I picked that number, based on some graphs they had of other people's gains, and it puffs if I get on it at zero boost/ low rpm, but one second later it's clear as air. (with rokktech sensor, exhaust, large paper air filter) This is 03 305hp, and it flowed 20 stock at 46K miles.



Super smooth, and torque went up precisely 32. 5%. (same as the honing ratio of 26. 5/20=1. 325 --- good job guys!) Noise is identical 75 dBA outside, and less vibration, quieter inside at all rpm. No mpg yet. We got some light snow, so I won't be doing any uphill EGT/boost test yet.

I don't like to give a HP gain, because the ECM defuels in 3-4 steps, causing the horsepower at 2500 rpm to be flat all the way to 3100 rpm. But without that defueling, these are technically 100HP injectors at the engine (1. 325 x 305 = 404. 1 hp) Since torque = hp x rpm, its easy to see that torque drops, for the horsepower to stay constant, at least on his inertia dyno. No boost fooler for me, I want to keep the stock turbo/clutch for now.

I have not felt the torque dropping on the street, so I wonder if the dyno inertia wheel accelerates faster than the truck in real world, causing the defueling. It's a 6 speed, so I don't care about revving the engine that high anyway. I can spin the tires in fourth with 315's and 3. 73.



One of my friends went with me and honed a set of aftermarket EDM injectors. Those things claimed to be 25HP injectors, but were anywhere from 23-26 LPM. Very uneven! That puts the smallest at +45 hp and the biggest at +90 HP gain. Now they are all at 27, which should be good for +107hp. My advice, don't go bigger than that for street use.



SO if you buy EDM injectors, let the buyer beware. Buy stock hp, and send them to hone them and balance them, don't trust that they will be built right. No wonder some people have smoking and roughness issues with EDM stuff.

 

[Tomeygun]

I was at Dyno-mite a couple days ago, and honed my stockers to 26. 5 liters/minute (on air @ 50psi). I picked than number, based on some graphs they had of other people's gains, and it puffs if I get on it at zero boost/ low rpm, but one second later it's clear as air. (with rokktech sensor, exhaust, large paper air filter) This is 03 305hp, and it flowed 20 stock at 46K miles.



Super smooth, and torque went up precisely 32. 5%. (same as the honing ratio of 26. 5/20=1. 325 --- good job guys!) Noise is identical 75 dBA outside, and less vibration, quieter inside at all rpm. No mpg yet. We got some light snow, so I won't be doing any uphill EGT/boost test yet.

I don't like to give a HP gain, because the ECM defuels in 3-4 steps, causing the horsepower at 2500 rpm to be flat all the way to 3100 rpm. But without that defueling, these are technically 100HP injectors at the engine (1. 325 x 305 = 404. 1 hp) Since torque = hp x rpm, its easy to see that torque drops, for the horsepower to stay constant, at least on his inertia dyno. No boost fooler for me, I want to keep the stock turbo/clutch for now.

I have not felt the torque dropping on the street, so I wonder if the dyno inertia wheel accelerates faster than the truck in real world, causing the defueling. It's a 6 speed, so I don't care about revving the engine that high anyway. I can spin the tires in fourth with 315's and 3. 73.



One of my friends went with me and honed a pair of aftermarket EDM injectors. Those things claimed to be 25HP injectors, but were anywhere from 23-26 LPM. Very uneven! That puts the smallest at +45 hp and the biggest at +90 HP gain. Now they are all at 27, which should be good for +107hp. My advice, don't go bigger than that for street use.



SO if you buy EDM injectors, let the buyer beware. Buy stock hp, and send them to hone them and balance them, don't trust that they will be built right. No wonder some people have smoking and roughness issues with EDM stuff.

Good to know they can even-out a hosed-up set of tips if needed.

Do you know how big they honed the holes to? or is that propietary info...



I want to get my extra set modded, But am a little unsure as to who should do them - EDM the stock tips, Hone the stockers, or go full on new tips from F1?



man'o'man this is confusing

 

[betterthanstock]

They only measure flowrate (26. 5 liter/minute at 50 psi air for me, 27 for my friend, like I posted above), nobody can accurately measure the hole diameter, nor do they need to. There's a lot of trade secrets to honing, like what compound/pressure you use. I looked inside them thru the boroscope afterwards, and were nice and smooth.

 

[ECappleman]

betterthanstock,

what other mods have you done to the truck?

Also what type of EGT increase do you see.



I have tried a couple of boxes, but would like to try some injectors on a basicly stock truck.



Thanks

 

[BIG BOB]

betterthanstock,

Since you are using flywheel HP of 305, I assume the 404 would also be flywheel hp, and this is an estimate, right?



I'm just courious, Lenny always does a before and after, didn't he do that for you?

 

[Idaho CTD]

All F1 injectors are balanced as well and have been since the very first set 4 years ago. Not all EDM's are the same so to advise against EDM's, except to get them for honing because one company has balance rates all over the map, is wrong. BTW all injectors start off life as EDM's.

 

[betterthanstock]

Up a 7% hill I pushed it to 85 mph and climbing(55 zone). I was able to hit 1250 EGT , whereas before injectors I could never hit 950. My stock injectors (+rokk sensor+muffler and air filter) dynoed at 275 @ 2900 rpm, 507 ft-lb @1900-2900. After injectors, it dynoed 331 hp @ 2700 rpm (vs 260 @ 2700 stock), then dropped to 315 @ 2900 . Torque was flat at 671 from 1850-2500, then dropped continuously to 510 @ 3100.



The biggest HP gain was 80 hp at 2450, 310 vs 230 hp (wheel). The biggest torq gain was 176 at 2200, 671 vs 495 ft-lb.

I tried again to feel torque dropping on the street, and still cannot, so I wonder about torq management on the inertia dyno. If torq stays flat on the street until 2900, then it should have 360 hp (at wheels) @2900 on street. I will take it to a load dyno, and if it still shows a drop I need to look into fuel pressure. I have a larger lift pump, so I hope I don't have to mess with that again. That EGT is perfect for the stock turbo, and clutch, which I intend to keep for a while.

To answer your questions, the 100 hp is based on the % increase of torq multiplied by the "advertised horsepower" of 305, and yes it is at the flywheel.

No offense to those selling EDM injectors, but for the price premium that oversize injectors carry over stockers, a light honing/balancing ought to be included.