B8 Injector Upgrade

[schwiz23]

I searched, and didn’t find a thread with the title. There is plenty of discussion about injectors failing or people screwing up the seals during installation, but nothing about an aftermarket injector set.

Are aftermarket injectors even needed on this platform? How about with K04?

As preventative maintenance is anyone replacing them? Seems like a decent idea considering the intake manifold needs to come off for carbon cleanings anyway.


Sent from my iPhone using Tapatalk

[lorduvtherings]

Yea s3 injectors way more spray, I have them with hpa k04

[Nano909]

Not worth it since on a B8 you're nowhere near maxed out at K04. B8.5 guys on E85 may be maxed out on K04.

I'd spend money elsewhere.

[Spawne32]

Injectors are not needed for a K04, but if you were considering using E85, talk to Trap about using the flex fuel injectors from the B8.5's, they are just a direct swap/replacement. Roughly 10% larger in terms of size.

[schwiz23]

No E85 in my future. It’s around MN but seems harder to find than 93. I guess that answers my question in terms of the B8.5 and K04.

When I do a carbon clean I may look around for replacement options.


Sent from my iPhone using Tapatalk

[Traptalk]

No E85 in my future. It’s around MN but seems harder to find than 93. I guess that answers my question in terms of the B8.5 and K04.

When I do a carbon clean I may look around for replacement options.


Sent from my iPhone using Tapatalk

Yeah I have the cpma/cpmb flex fuel injectors

Can run them with pump gas. I haven’t started tuning ethanol yet since I’ve had issues with my turbo and I daily the car with 93

Not really needed if don’t plan to run any e tho, guess would give you a bit of over head just to have it but you can wait till they need replacement

Idk why that dude is running s3 injectors for k04 lol is he b7 ?

[bb-tt]

As nearly everyone else has said here unless you are going to e85 the injectors are not a limiting factor. Now if you had plans in the future to upgrade then yes while you are already taking the manifold off it would probably be smart to do now and save yourself some labor later.

[peasegamer]

I've had injectors go out twice already while running APR stage 1 with e85. Since then I go e85 maybe 1/5 fill-ups. I would love to go stage 3 soon, but I wouldn't want to do upgrade without better injectors. For those that upgraded injectors, did you have someone do a custom tune? Because APR told me that new injectors require a tune.

[Traptalk]

I've had injectors go out twice already while running APR stage 1 with e85. Since then I go e85 maybe 1/5 fill-ups. I would love to go stage 3 soon, but I wouldn't want to do upgrade without better injectors. For those that upgraded injectors, did you have someone do a custom tune? Because APR told me that new injectors require a tune.

Sounds like a tuning issue honestly

Factory flex fuel cars have a 5th injector which can be used to take stress off the di system and create additional over head.

Hpfp is a weak link before injectors in terms of volume/flow.

We know the hpfp maxes out around e40. If you’re filling up pure e85 the tune is probably running short on fuel supply from the hpfp and opening the injectors for longer. The longer pulse width makes the injectors get very hot and then burn out.

I’d try lowering the ethanol content and see what happens

Assuming you’re using quality injectors to begin with

[Mars2]

HPFP only improve fuel delivery at mid range because their you have space to increase injection time ( piston stay longer at place were you should inject) at high rev you need bigger injector that can deliver more on the short time. 6m.s to 8m.s depending if Injection start point stay like OEM or is tuned to come earlier.
At high rev HPFP can't really help more than going from 180 bar to 195bar. that is just a very little increase in flow for the injector's.

No problem with my B8.5 Flexfuel injector only running 100%E85 for 50.000Miles.

If you have B8.5 Flex fuel find a tuner that enable fifth injector to help the DI injector's.You can upgrade that 5th injector to a bigger one.
With 1000cc 5th injector like I have you have enough E85 for an other 110 WHP. SO something like 400- 420WHP on E85
On top of that this 5th injector will keep your intake valve cleaned.

[Traptalk]

HPFP only improve fuel delivery at mid range because their you have space to increase injection time ( piston stay longer at place were you should inject) at high rev you need bigger injector that can deliver more on the short time. 6m.s to 8m.s depending if Injection start point stay like OEM or is tuned to come earlier.
At high rev HPFP can't really help more than going from 180 bar to 195bar. that is just a very little increase in flow for the injector's.

No problem with my B8.5 Flexfuel injector only running 100%E85 for 50.000Miles.

If you have B8.5 Flex fuel find a tuner that enable fifth injector to help the DI injector's.You can upgrade that 5th injector to a bigger one.
With 1000cc 5th injector like I have you have enough E85 for an other 110 WHP. SO something like 400- 420WHP on E85
On top of that this 5th injector will keep your intake valve cleaned.

That’s why I speculated that’s it’s the software

[Traptalk]

HPFP only improve fuel delivery at mid range because their you have space to increase injection time ( piston stay longer at place were you should inject) at high rev you need bigger injector that can deliver more on the short time. 6m.s to 8m.s depending if Injection start point stay like OEM or is tuned to come earlier.
At high rev HPFP can't really help more than going from 180 bar to 195bar. that is just a very little increase in flow for the injector's.

No problem with my B8.5 Flexfuel injector only running 100%E85 for 50.000Miles.

If you have B8.5 Flex fuel find a tuner that enable fifth injector to help the DI injector's.You can upgrade that 5th injector to a bigger one.
With 1000cc 5th injector like I have you have enough E85 for an other 110 WHP. SO something like 400- 420WHP on E85
On top of that this 5th injector will keep your intake valve cleaned.

That’s why I speculated that’s it’s the software

[ericA6]

Which injectors are recommended? I see ECS sells Bosch, Bremmen and OE Audi


Sent from my iPhone using Audizine Forum

[bb-tt]

Which injectors are recommended? I see ECS sells Bosch, Bremmen and OE Audi


Sent from my iPhone using Audizine Forum

https://www.hamptontuning.net/produc...low-injectors/

[ericA6]

https://www.hamptontuning.net/produc...low-injectors/

$800! Yikes! At most I might go eBay K04 with tune. I will not be shooting for big numbers that require this type of upgrade.


Sent from my iPhone using Audizine Forum

[bb-tt]

stock injectors supply all the fuel u need for k04

Edit:

I put down 320awhp and 369 ftlbs of trq on a mustang dyno with stock injectors and still have headroom for more fueling.

[ericA6]

stock injectors supply all the fuel u need for k04

Edit:

I put down 320awhp and 369 ftlbs of trq on a mustang dyno with stock injectors and still have headroom for more fueling.

That’s exactly what I understood about the stock injectors. So my question still remains... which injectors are the best for stock through K04 tune? Best reliability for the $$. Any other brands that ECS doesn’t sell?


Sent from my iPhone using Audizine Forum

[A4x]

Bosch is the OEM injector. Go with those. I got mine from Rock Auto and they have been good. Look into FCP Euro if you want a lifetime warranty.

[earhythmic]

Yeah I have the cpma/cpmb flex fuel injectors

Can run them with pump gas. I haven’t started tuning ethanol yet since I’ve had issues with my turbo and I daily the car with 93

Not really needed if don’t plan to run any e tho, guess would give you a bit of over head just to have it but you can wait till they need replacement

Idk why that dude is running s3 injectors for k04 lol is he b7 ?

Do you happen to have a model number for the flex fuel injectors? I have to service mine on the Allroad and google searches usually just result in more questions.

[Traptalk]

Do you happen to have a model number for the flex fuel injectors? I have to service mine on the Allroad and google searches usually just result in more questions.

This looks like it

https://www.fcpeuro.com/products/aud...or-bosch-62823

The Bosch number for the no flex is like 62819 I believe

[bb-tt]

Do you happen to have a model number for the flex fuel injectors? I have to service mine on the Allroad and google searches usually just result in more questions.

https://www.golfmk6.com/forums/index...236536/page-39

maybe helpful/ maybe not bookmarked it aq few weeks ago

[ROOSTER1050]

HPFP only improve fuel delivery at mid range because their you have space to increase injection time ( piston stay longer at place were you should inject) at high rev you need bigger injector that can deliver more on the short time. 6m.s to 8m.s depending if Injection start point stay like OEM or is tuned to come earlier.
At high rev HPFP can't really help more than going from 180 bar to 195bar. that is just a very little increase in flow for the injector's.

No problem with my B8.5 Flexfuel injector only running 100%E85 for 50.000Miles.

If you have B8.5 Flex fuel find a tuner that enable fifth injector to help the DI injector's.You can upgrade that 5th injector to a bigger one.
With 1000cc 5th injector like I have you have enough E85 for an other 110 WHP. SO something like 400- 420WHP on E85
On top of that this 5th injector will keep your intake valve cleaned.

(hopefully) reviving a "dead" topic --- I've been been APR tuned for e85 on my 2015 B8.5 allroad for about 4 months now, and I generally only run/fillup with e85. I have noticed on several occasions when under heavy acceleration or WOT , I get a bit of a "chug" or stall in rising RPMs and power...... coming off a full boat K04 mk6 GTI, the feeling is very similar to when the kot/GTI wasn't quite getting enough fuel ....

long story short and in reference to the above quoted information --- is that 5th injector activation software specific? I was actually thinking about trying bigger/better injectors to see if the "issue" goes away ... would it be worth my time to try the 5th injector option if not already activated?? (albeit unbeknownst to me by APR software?)

[coloughlin19]

I heard S3 injectors are the way to go for better fueling


Sent from my iPhone using Audizine

[Mars2]

I just got a set of Mabotech EA888 injector's. they are 30% more than S3/G7R.

the ref of the injector before Mabotech modify them is 06L 906 036 AB ( Bosch 0261500595)
I order those and get delivery from Hungaria by Fedex 24 hour later. i'm in France. Look like Hungaria is where they modify those.

[Militant-Grunt]

Eventually i'll be running the Nostrum injectors on my EFR 7163 setup, currently I maxed out the stock in tank pump. Injectors still had room at 20psi.

[HOJeepster]

(hopefully) reviving a "dead" topic --- I've been been APR tuned for e85 on my 2015 B8.5 allroad for about 4 months now, and I generally only run/fillup with e85. I have noticed on several occasions when under heavy acceleration or WOT , I get a bit of a "chug" or stall in rising RPMs and power...... coming off a full boat K04 mk6 GTI, the feeling is very similar to when the kot/GTI wasn't quite getting enough fuel ....

long story short and in reference to the above quoted information --- is that 5th injector activation software specific? I was actually thinking about trying bigger/better injectors to see if the "issue" goes away ... would it be worth my time to try the 5th injector option if not already activated?? (albeit unbeknownst to me by APR software?)

Any update on this? I have experience a similiar chug on WOT with Ko4 APR3. Wondering if you found out if the APR KO4 tune uses the 5th injector? How about upgrading that to a 1000cc 5th injector, that help? Just got my first cylinder 2 misfire on WOT as well, not sure why, i replaced coils and plugs less than 10k miles ago....maybe bad fuel? Or running stock cat during winter?

[bb-tt]

Any update on this? I have experience a similiar chug on WOT with Ko4 APR3. Wondering if you found out if the APR KO4 tune uses the 5th injector? How about upgrading that to a 1000cc 5th injector, that help? Just got my first cylinder 2 misfire on WOT as well, not sure why, i replaced coils and plugs less than 10k miles ago....maybe bad fuel? Or running stock cat during winter?

log desired and actual rail pressure, low pressure, and eq to see if you are meeting demand. If it is sputtering between 3-4 k most likely the hpfp not keeping up but you really need to log to figure it out.

[Nano909]

Any update on this? I have experience a similiar chug on WOT with Ko4 APR3. Wondering if you found out if the APR KO4 tune uses the 5th injector? How about upgrading that to a 1000cc 5th injector, that help? Just got my first cylinder 2 misfire on WOT as well, not sure why, i replaced coils and plugs less than 10k miles ago....maybe bad fuel? Or running stock cat during winter?

Lots of people have those same issues with the APR K04 tune. It's the tune. Talk to Grouch, he just "fixed" it by running a different tune.

[Grouch]

Lots of people have those same issues with the APR K04 tune. It's the tune. Talk to Grouch, he just "fixed" it by running a different tune.

Yep, most likely the tune. I was having weird hiccups at 3rd gear WOT. My trusted mod shop ran multiple logs and couldn't find any issues. After getting no support from APR, I reached out to Tyler @ WPT. Swapped tunes and now my car is running solid.

[cybernet99]

Yep, most likely the tune. I was having weird hiccups at 3rd gear WOT. My trusted mod shop ran multiple logs and couldn't find any issues. After getting no support from APR, I reached out to Tyler @ WPT. Swapped tunes and now my car is running solid.

YES, I second running a Ward Performance Tune ... Tyler is working closely with me on my big Turbo build. He is the man to make these builds work well!

[bb-tt]

YES, I second running a Ward Performance Tune ... Tyler is working closely with me on my big Turbo build. He is the man to make these builds work well!

Would you guys stop promoting Tyler, I am trying to get to the top of the list I don't need any more serious competition.

[JLAllroad]

Any update on this? I have experience a similiar chug on WOT with Ko4 APR3. Wondering if you found out if the APR KO4 tune uses the 5th injector? How about upgrading that to a 1000cc 5th injector, that help? Just got my first cylinder 2 misfire on WOT as well, not sure why, i replaced coils and plugs less than 10k miles ago....maybe bad fuel? Or running stock cat during winter?

Does this “chug” happen with the engine fully warmed up?

How many miles on your engine/injectors?


Sent from my iPhone using Audizine Forum