DW injectors

[beeronz]

Howsit going everyone,
I recently purchased a new set of Deatschwerks 550 injectors based upon research and reviews I've read through Google. However, I'm hearing through some local friends and a few other reviews that these injectors are crap for tuning and don't last very long. How true is this?
This SR is a daily with occasional drags on the track. Not looking for crazy mad power, but I figured it be best to upgrade the injectors since I'm probably very close to maxing out my stock 370's.
I appreciate anyone's input.

Oh, if it makes a difference, I'm gonna go with the enthalpy tune.

Thanks!

[Johannes]

If you're talking about deatschwerks injectors then they're fine. I've been running my 740cc for 2 years with no problems, and the guy I bought it from ran it for like 3 years. Also running R.S. Enthalpy tune, Martin's a great guy.

Here's my dyno video with Martin tuning it here in WA

https://youtu.be/mnI_dn0ruRQ

[2muchboost]

Probably the first time I have ever heard any negative feedback about deatschwerks......assuming we are.

[cotbu]

Deatschwerks injectors are redrilled stock injectors so latency is a reflection of that. so 270's are usually 550 or 555 and 370's are 740,'s
because they are redrilled you might get an odd injector set like 520 , 540, 750 or 760,

the injectors do work, but can become unpredictable as they wear overtime, because the holes will erode. my 555's were 580 after 2 1/2 years. This is still not a problem.

The problem comes in the form of tuning, the latency and then the change of flow. They tend to flow more than a standard built injector, and ive seen tunes were you have to run 50psi base and there's is so much fuel pulled that you would normally be lean. Tuning is a science, and you expect a certain outcome from your actions. I just hated trying to find the correct reaction.

Enthalpy tunes dw injectors and this might be the reason people have problems with used enthalpy Tuned ecu's. dw550 or dw740 aren't the same as Nismo or sard. Then you have people who run wrx or whatever injectors just because the cc is the same. That's a no no. Will it work? Sure!

They are a good budget alternatives, until you plan on tuning or upgrading.
You really shouldn't have to worry about them going static or getting clogged, and in a couple years you might not have to upgrade injectors . That's a win.

Sent from a Highly Tuned Note 4.5!!!

[shomo172]

If you don't mind going top feed, I work at Fuel Injector Clinic here in Florida and we have the most precise matching in the industry. We match them on flow AND latency with our customized flow bench. Of course you would have to get a top feed fuel rail. And if you ever have problems, our customer service is top notch and always at the shop to answer questions.

http://www.fuelinjectorclinic.com

[2muchboost]

Kind of side tracking but not so much....arent like 90% of the aftermarket injectors sold some form of stock or batch injectors. Correct me if I am wrong but from research a long while ago (and I am an old man), dont most companies buy a batch from a company (ie: Bosch) and then redrill and test them prior to branding them their own? I am sure there are companies that are our there that have a direct supply from a manufacturer but that is the rarity...again correct me if I am wrong.

I can vouch for FIC personally. Have used them on 3 different setups any where from 1000-1650 cc with absolutely no issues and great customer service.

[shomo172]

For the most part, yes. FIC, ID, and DW get the base injector from Bosch. Not all of them are cut or drilled for different flow rates. Really depends on which injector. Our 1650cc and 2150cc are not modified by us at all. But for the most part, you are correct.

I'm glad you're happy with FIC. If you need anything else in the future, give us a call!

[derass]

This article has always kept me away from re-drilled injectors such as DW and Five-0: http://www.motoiq.com/MagazineArticles/ID/1929/Tuners-Test-Your-Injectors.aspx

It makes me wonder though: how are the Tomei/HKS/Nismo injectors any better?

[KAT-PWR]

They are probably ordered in substantial quantities made in their specified flow rate. Hence why they cost an arm and a leg...
Whereas DW probably buys excess stock low CC injectors (as i'm sure there is a huge quantity of them) and re-drills them.

[beeronz]

I appreciate the replies everyone.
Sounds like it's hit and miss due to the re drilling?

My buddy who warned me about them (after the fact I bought them...face palm) said the Tomei/Nismo/IED injectors are the closest to OEM specs (non drilling/flow rates/durability etc.

I'm pretty disgruntled that I have this DW's BNIB, and I'm pretty sure I no longer want them...and guarantee I'm gonna take a loss on them by selling.
Anyone think I should run them anyway?

Shomo, I'll check out your website when I have a computer available, and start researching what I'll have to do to my notch top to run a top feed setup.

[dorkidori_s13]

i had nothing but bad luck with deatschwerks injectors back in 06/07 running E85 on them. the fuel would blow the coils out after a few weeks (went thru 4 sets). also, they didnt hold a tune for shit! we would get them tuned for one throttle/RPM area, then the next level up/down would be off... cold starts were terrible, my SR would barely run until fully warmed up.

i ended up going with an american top feed 1200cc injector (cant remember the brand off hand), had zero tuning or longevity issues! dropped them in with a top feed rail and resistor pack, got them tuned within an hour on the dyno (DW injectors took 2 hours to get a somewhat stable tune on), i had ZERO issues after words. cold starts were perfect and they worked just fine for the 3 years i had the car after.

my experience with deatschwerks is that they are total hit and miss in everything ive read about them over the years with the 240 community.

tomei/nismo/HKS etc brand name injectors are built at the size they are specified for and go thru stringent QC before being sold. tomei/nismo are meant as OE replacement direct drop in. they are purpose built to last as long as the car (hence why they cost so much). its not uncommon for top tier manufacturers who find deviation in product to throw said item in the garbage (i know for a fact HKS would do this with turbos that didnt pass QC due to slight deviations in wheels or housings, buddy of mine worked for them for 10+ years over in Japan)

honestly, i would HIGHLY recommend you DO NOT skimp on your fuel injectors! its one of the most important aspects of your motor. im not hating in DW, but after my experience of 14 years in building these stupid cars, you DO NOT want to save a few bucks on something so important to the longevity/reliability of your motor!

[beeronz]

Thanks for the input buddy.

I guess I'm gonna sell them then.
Can't have a daily take a dump on me while driving, or while at the track (if I ever go again).

So to run top feed I just need the rail, a FPR plus the injectors and we're good to go?

[shomo172]

If you're looking for the 500cc range, we have our 525cc you can find on the FIC website. This is an unmodified injector from Bosch that we flow test and match. Lots of V8 guys run these as well. Honestly some of the more affordable and reliable injectors near that flow range.

[beeronz]

If you're looking for the 500cc range, we have our 525cc you can find on the FIC website. This is an unmodified injector from Bosch that we flow test and match. Lots of V8 guys run these as well. Honestly some of the more affordable and reliable injectors near that flow range.

Are these the injectors for the 350z? That's the only related nissan 525's I could find. lol

[shomo172]

Are these the injectors for the 350z? That's the only related nissan 525's I could find. lol

Well the reason we don't have any SR20det applications is because we only specialize in top feed injectors, which SRs don't have. So how they're set up depends on the top feed rail you buy. So any 4 cyl price would be the same, they're $325 retail. Super popular injector so they're one of the least expensive. Most companies mod these into 1000cc.

[dorkidori_s13]

top feed and side feed injectors are totally different beasts

if you want an easy drop in solution, buy a set of Tomei/Nismo injectors and call it a day. theyre low impedence so they dont require an injector resistor box to be wired in and you can retain your OE FPR since youll be using the OE fuel rail (though i HIGHLY advise you to buy an aftermarket unit like Tomei or Aeromotive WITH A GAUGE). id recommend you buy a real stand alone like NISTUNE (if you want to keep your MAF eww) or a PowerFC DJetro (MAP version)... ROM tunes are so 1998.

if you wanna go big dog status... top feed fuel rail, top feed injectors, aeromotive FPR, injector resistor box, PowerFC DJetro or AEM V2 (get rid of that stupid MAF)

[derass]

I agree, for a typical ~400whp SR20, using side-feed injectors is the most cost-effective option.

As for top-feeds, depending on the tuning solution, you may not need a resistor box. The Haltech PS1000 for example is capable of supporting both high and low impedance injectors. You simply change one setting in the software.

[beeronz]

Well the reason we don't have any SR20det applications is because we only specialize in top feed injectors, which SRs don't have. So how they're set up depends on the top feed rail you buy. So any 4 cyl price would be the same, they're $325 retail. Super popular injector so they're one of the least expensive. Most companies mod these into 1000cc.

Ahh I see. Thanks for that clarification.
Due to me not wanting to spend the money of a big baller, I think I'm just gonna get legit side feeds. It'll end up being cheaper than ordering a fuel rail and fpr on top of ordering top feeds.

top feed and side feed injectors are totally different beasts

if you want an easy drop in solution, buy a set of Tomei/Nismo injectors and call it a day. theyre low impedence so they dont require an injector resistor box to be wired in and you can retain your OE FPR since youll be using the OE fuel rail (though i HIGHLY advise you to buy an aftermarket unit like Tomei or Aeromotive WITH A GAUGE). id recommend you buy a real stand alone like NISTUNE (if you want to keep your MAF eww) or a PowerFC DJetro (MAP version)... ROM tunes are so 1998.

if you wanna go big dog status... top feed fuel rail, top feed injectors, aeromotive FPR, injector resistor box, PowerFC DJetro or AEM V2 (get rid of that stupid MAF)

I think I'm gonna go with the easy drop in solution. lol. Like the reason stated above, and I'm not ready to really start building this motor. I don't see that coming for a few more years.

I agree, for a typical ~400whp SR20, using side-feed injectors is the most cost-effective option.

As for top-feeds, depending on the tuning solution, you may not need a resistor box. The Haltech PS1000 for example is capable of supporting both high and low impedance injectors. You simply change one setting in the software.

Awesome. Thanks for the input. I'll ditch my DW injectors for some nismo's.
Any idea what anyon would pay for some bnib 550's? lol