The truth about drilled injectors

[DSteck]

Per the request of 5_liter_eater, Paul Yaw from Injector Dynamics took the time to do a comparison test between a factory injector and the same injector with a drilled plate. A lot of companies claim drilled injectors don't change the offset and short pulse data, but that's a load of crap. Next time you see somebody advertising drop in injectors that are drilled, tell them to go pound sand.

Bill (Winters), I hope this is enough to convince you.

http://www.injectordynamics.com/Dril...dDipshits.html

[eficalibrator]

I hate to tell everyone "I told you so", but...


Amen!

[5_Liter_Eater]

I conceded that the offset and pulse adder numbers are different over on the other forum. So my next question is, is there an appreciable difference in how the car behaves? People have been swapping injectors for years without having the "correct" data for them.

Also, I thought one of Greg's other beefs with drilled or re-tipped injectors was that the spray pattern and/or atomization is not the same. Both of the companies we're talking about are essentially doing the same thing to the injectors. The difference is one provides their own data.

[DSteck]

The way an injector is modified can create a usable or horrible pattern. Yes, people have been doing it for years, but that doesn't mean we can't demand better quality for calibrations. Bill, I would encourage you to do a comparison test between characterized and molested injectors. I've noticed a big difference in terms of startup and idle fueling consistency.

[LSxpwrdZ]

I'm glad someone did this test to show they aren't just drop in and change the flow table! I've had lots of customers ask about these type injectors and I've steered them away because I knew changing something in the injector that alters the flow rate would change more than just flow rate. It's kinda common sense if you think about it.

[Injector Dynamics]

I think it's clear, but if not I want to note that we do not drill injectors. The reasons are numerous and deserving of an entirely separate article. For now though, I'll just make it clear that we don't.

Thanks

Paul Yaw
Injector Dynamics

[69lt1bird]

I do believe that they are not perfect but I would rather see testing and data from an independent lab rather than people who can profit from the testing.

[DSteck]

The problem is that aside from OEMs... Injector Dynamics is the only company capable of doing it. That alone should tell you how full of crap the idea about drilled injectors not changing is.

[Trent_Petersen]

I just want to take a second to say that the guys from ID (I have been dealing with Tony) are the best, by far, guys to work with on getting injectors to work correctly.

I am installing a set of ID1000's on my 3800 This weekend and Tony was emailing me pretty late last night to get me the tables I need to just drop those babys in and go.

[LowePerf]

I think it's clear, but if not I want to note that we do not drill injectors. The reasons are numerous and deserving of an entirely separate article. For now though, I'll just make it clear that we don't.

Thanks

Paul Yaw
Injector Dynamics

Pauls here,there goes the neighborhood! How's my "Detroit smoking buddy" doing?
-John

[Injector Dynamics]

Hey John.

Finally pulled my head out and quit that nasty habit. Now I'm grumpier than ever.

To 69lt1bird, I would like to point out that I didn't use the article to say that drilled injectors were bad, (That's a separate article...) but to dispell the myth that their dynamic response remains unchanged after drilling.

We (Injector Dynamics) have made our name by backing up our claims with data, and a willingness to defend our position with facts.

If you have any questions or concerns about the article, I would be happy to answer here on a public forum.

In any case, I'm glad you took the time to read it, and I hope you got something out of it.

Paul Yaw
Injector Dynamics

[IDRIVEAG8GT]

What the....? It takes common sense to not know that when you re-drill an injector every aspect changes in how it performs. I should've done more research, but I didn't even know people were doing this without taking all the injector tables into consideration. Hell, why else would HP Tuners include the Pulsewidth tables in their program, if they weren't meant to be changed to accommodate your new injectors?

[carlrx7]

I am running LS2 injectors redrilled to 60#. My ID1000's just came in with my HOB fuel system. Just waiting for the data to find its way into my mailbox. Going to swap these bad boys in and see what all the hype is about, then go ahead and install the fuel kit.

[ctd]

I am running LS2 injectors redrilled to 60#. My ID1000's just came in with my HOB fuel system. Just waiting for the data to find its way into my mailbox. Going to swap these bad boys in and see what all the hype is about, then go ahead and install the fuel kit.

Any results yet?

[DSteck]

Any results yet?

Carl started another thread about how well they work.

[Injector Dynamics]

Any results yet?

carlrx7 posted results here

[ctd]

Got it Thanks.

I just spoke with Mitchel regarding my application.

[Alvin]

I don't know about you guys but my biggest beef with drilled injectors is that they do not flow as advertised. We just had a set of 55's (rated at 4 bar) max out on a 2010 camaro at 540rwhp at the tire.. Fuel pressure at the rail at the top of the pull was 56# Think about that. I can't tell how many times we've taken 42's to the mid-high 500's @ 3 bar in other manual cars.