I talked to Cody (850HP guy) from GJ and he said he has bullydogs 100HP injectors...Has anyone tested or hear much about these? They are new news to me. How do they get more power out of injectors...just spray more fuel into the engine?? Are they worth it?
Thanks all

You better have your flame suit on for this subject again(850hp)

Trust me its on! gloves and all, is what I meant by (850hp) is so you guys know who I am talking about. I know its not possible with his set-up. I am mainly just woundering about the 100HP injectors.

You need a CP3 to keep rail pressure & a bigger turbo to utilize the extra fuel or it will just be one big black cloud coming out & you can watch the fuel gauge drop for nothing.

So again BS?? have you ever heard of anyone using these injectors...you can have one of the fastest trucks around and have stock injectors right? stock injectors have a huge power range as long as there is fuel...right?
thanks

Last I knew N20 Dmax had stock injectors & he ran a 11.2x, well atleast 11.48 & NLDP ran a 11.49.

Never know the true story with some guys, secret squirrel stuff.

Run propane instead of injectors, better mileage for the street & extra fuel when used with nitrous.

Dr. Performance has injectors that are claimed to add 100HP/220FPT so it must be possible. I have an instructor that is running his injectors on a Excursion which I believe has a 7.3. He dynoed before and after and says he got 100HP and 2 MPG. Here is a link if you want to look for yourself.

http://drperformance1.reachlocal.com/coupon/?scid=42633&cid=3910&tc=05072423175345060

I also have some correspondance with them that I will quote for you. Be right back... OK here is somemore...

Hi David my name is Kevin Gardner I am Tech director for Dr Performance, maybe I can help answer the question how we get 100/200 out of just injectors. The Key is atomization and how the fuel is dispersed into the cylinder along with the angle of spray to get the maximum combustion possible. The other key is balance of the cylinders, from the factory there is a tolerance between how many (liters per minute) LPM each injector flows. With this tolerance one cylinder is having to work harder to keep up with another robbing power and fuel economy, but if you balance the injectors to match the LPM flowed you get a better and smoother running engine. Hope this helped if you have any other questions please call 877-338-7373 or e-mail kevin@drperformance.com (http://us.f333.mail.yahoo.com/ym/Compose?To=kevin@drperformance.com)

thanks
Kevin Gardner


At 2k they aint cheap but it's quite a bit less then what it costs to add 100 HP to gas engines. (thinking blowers) The other nice thing is they are stock injectors so no warranty issues and no extra heat to worry about from over fueling.

At 2k they aint cheap but it's quite a bit less then what it costs to add 100 HP to gas engines. (thinking blowers) The other nice thing is they are stock injectors so no warranty issues and no extra heat to worry about from over fueling.

Did you word that right? Just wondering

From what I have been told they are using stock injectors and improving upon them. Polishing the bowls, beefing up springs, and flow testing them to get matched sets. Basically a balanced and blueprinted set so to speak. I guess you can say modified instead of improved upon but they claim that you will have no warranty issues using their product.

EDIT: They also say they are improving the atomization and not adding fuel to get their gains.

I haven't pushed injectors to see how far they can go, but 50-60HP is about what I suggest. I can drive mine pretty decent without fogging the road and really like the response. Alone with boost you will set codes also.

If you could gain 100HP without adding fuel and simply changing atomization don't you think Bosch would do it? I don't know how the nozzle angle can be changed without recuting the hole and enlarging it. Bosch injectors are very well balanced from new...

Interesting... You are saying up front that you are increasing flow to get the power. Dr. Performance claims to get theirs by better combustion. I am not looking to get you into a pissing match on this, but I would like to more about what you know. ;) I understand the HEUI's pretty well, but I haven't spent much time at all on the Dmax injectors. Thanks for your time if you have it to give.

Increasing fuel delivery is how we make power plain and simple. If there were 100HP to be had Bosch would have it. The fuel system mfrs are always looking for more and more new ways to make more power with less fuel and less emissions. A 5HP gain w/o adding fuel is a big thing...

Here's my perspective... On the HEUI you get a full delivery of fuel in each cycle no matter whether it's at idle or wide open. That is why economy doesn't change a whole bunch on an empty truck whether wide open or cruising. Maybe 2 or 3 mpg? The way power is derived is by how much oil pressure is applied to the intensifier piston which changes atomization. I believe it's a 7.5:1 ratio meaning for every PSI of oil delivery you get 7.5 PSI of fuel. That doesn't mean the 30 PSI on the guage is applied to it as the oil pressure is increased as it goes to the fuel management side. I am of the understanding that on Dr. Performance's HEUI's they are polished, have titanium springs, (lighter, stronger, quicker) and are balanced and matched to get his results. I am not aware of them increasing the bowl size but it could be part of it.

I have little knowledge of how the Bosch units work so this is why I am thinking the way I am. Please explain where I am wrong and right and again thanks for your time in my edgimication. ;) :)

Increasing fuel delivery is only one way of doing it isn't it? What about increasing effeciency? Won't better atomization increase stock results? How about tightening the specs from injector to injector to match them better? Please understand I am only trying to learn more by showing you what I have already been taught. I am in no way trying to tell you your business.

Here's my perspective... On the HEUI you get a full delivery of fuel in each cycle no matter whether it's at idle or wide open. That is why economy doesn't change a whole bunch on an empty truck whether wide open or cruising. Maybe 2 or 3 mpg? The way power is derived is by how much oil pressure is applied to the intensifier piston which changes atomization. I believe it's a 7.5:1 ratio meaning for every PSI of oil delivery you get 7.5 PSI of fuel. That doesn't mean the 30 PSI on the guage is applied to it as the oil pressure is increased as it goes to the fuel management side. I am of the understanding that on Dr. Performance's HEUI's they are polished, have titanium springs, (lighter, stronger, quicker) and are balanced and matched to get his results. I am not aware of them increasing the bowl size but it could be part of it.

I have little knowledge of how the Bosch units work so this is why I am thinking the way I am. Please explain where I am wrong and right and again thanks for your time in my edgimication. ;) :)

Increasing fuel delivery is only one way of doing it isn't it? What about increasing effeciency? Won't better atomization increase stock results? How about tightening the specs from injector to injector to match them better? Please understand I am only trying to learn more by showing you what I have already been taught. I am in no way trying to tell you your business.

Ford uses some kind of oil control on their injectors, gm/bosch is all electronic.
on a stock motor that doesn't smoke, all the fuel is being burned in the cylinder.
so for more power u need more fuel and eventually u will get smoke from the unburnt fuel going out the pipe.
I'd say that when the are blueprinting the injectors they could be etching the holes gving more flow.
Even the 40% over injectors on gm trucks, I bet the dealer couldn't tell the difference, maybe even the 80+% over too.
Your only going from like .005" up to .007".