The 034 High Pressure Fuel Pump Piston Upgrade Kit for 2.9T & 3.0T is Now Available!

[034Motorsport]

The 034Motorsport High Pressure Fuel Pump Piston Upgrade Kit for Audi 2.9T & 3.0T EA839 is erfinally here!

The 034Motorsport High Pressure Fuel Pump Piston Upgrade Kit is designed to be a drop-in replacement piston for the factory high pressure fuel pump for the 2.9T and 3.0T TFSI EA839 engines found in the B9/B9.5 Audi S4/S5/SQ5/RS5, C8 Audi A6/A7/S6/S7, and 4M.5 Audi Q7/Q8.

By upgrading the factory high pressure fuel pump with the 034Motorsport High Pressure Fuel Pump Piston Upgrade Kit, the factory fueling limits are raised by up to 37% in 2.9T or 3.0T EA839 engines. This increased flow allows the fuel system to meet the higher demands for ethanol, race gas, more pump gas, and pairs perfectly with all Dynamic+ ECU software that requires an upgraded High Pressure Fuel Pump!

FEATURES:

• Yields up to 37% Flow Increase Over the Factory High Pressure Fuel Pump
• Raises the Factory Fueling Limits Present in 2.9T and 3.0T Engines
• Increased Flow to Meet the Demands of E85 Optimized Tunes and Turbo Upgrades
• Required for Most Stage 1+, 2+, and Stage 3 Performance Software
• Fuel Pump Internals Precision-Machined to Aerospace Tolerances
• DLC Coated Piston and Cylinder for Reduced Friction and Increased Performance
• Matched Piston and Cylinder for Absolute Precision
• Relatively Easy Installation

WHAT’S INCLUDED:

• 1x Pump Piston & Cylinder Set

Note: EA839 High Pressure Fuel Pump Tool is highly recommended for ease of installation


Check it out here!

[kmarei]

if i instal this, does this mean i can no longer use the stock tune?
so i would need the 034 stage 1/1+ tune installed at all times?

[kfxjc]

if i instal this, does this mean i can no longer use the stock tune?
so i would need the 034 stage 1/1+ tune installed at all times?

You can use it on a stock tune, excessive fuel would just be returned to the low pressure side of the fuel system. Why replace though if the vehicle is stock? Factory pump as zero issues for a stock vehicle.

[kmarei]

You can use it on a stock tune, excessive fuel would just be returned to the low pressure side of the fuel system. Why replace though if the vehicle is stock? Factory pump as zero issues for a stock vehicle.

i have the 034 tune now
i was wondering if i ever take my car to dealer, i would normally flash back to stock
otherwise if i ever have issues, the tune will be the first thing they point to
and if i can't take the car back stock, i am worried i run into a problem
and the dealer refuses to help me since its an aftermarket tune

[JohnEnglish]

i have the 034 tune now
i was wondering if i ever take my car to dealer, i would normally flash back to stock
otherwise if i ever have issues, the tune will be the first thing they point to
and if i can't take the car back stock, i am worried i run into a problem
and the dealer refuses to help me since its an aftermarket tune

Unless you're using it with E85, there is no benefit to the HPFP upgrade. 034 themselves say that there is no advantage to using an upgraded HPFP if you're using 91 or 93 octane fuel.

[kmarei]

Unless you're using it with E85, there is no benefit to the HPFP upgrade. 034 themselves say that there is no advantage to using an upgraded HPFP if you're using 91 or 93 octane fuel.

i know
i would be using with tih E85
i just want to know if i install it, do i HAVE to be running a tune or can it run with stock tune

[JohnEnglish]

i know
i would be using with tih E85
i just want to know if i install it, do i HAVE to be running a tune or can it run with stock tune

It can be used with the stock tune.

[034Motorsport]

i know
i would be using with tih E85
i just want to know if i install it, do i HAVE to be running a tune or can it run with stock tune

It can be installed on the stock tune, though there is zero advantage to having it installed without accompanying tuning.

-Sean@034

[abamfo]

Are they any advantages for stage 1 tunes not running e85?

[kmarei]

Are they any advantages for stage 1 tunes not running e85?

no
only benefit is if you are running E85
stock pump can provide enough 91/93 octane fuel for stage 1 tune
stage 1 E85 has some issues on stock pump

stage 1+ E85 needs higher flow HPFP

[abamfo]

no
only benefit is if you are running E85
stock pump can provide enough 91/93 octane fuel for stage 1 tune
stage 1 E85 has some issues on stock pump

stage 1+ E85 needs higher flow HPFP

What about if you run an e30 mix on the stage 1 93 file?

[kmarei]

What about if you run an e30 mix on the stage 1 93 file?

unfortunately i don't think 034 supports any blend tunes (so no E30 tune)
even though they have said that would make more power than the 93 octane tune

however i am running E30-E35 belnd (4-5 gallons of E85 and 93 octane for the rest ~10 gallons)
AND i have a JB4 on map 2 with the 034 93 tune
and have had no issues with fueling
but try to be around 4-4.5 gallons of E85
when i put too much E85, i did have an error code once, that was bascially not enough fuel
but then again, that may have been because of the extra 3psi boost of the JB4 map 2
start with 4 gallons and take it from there

[034Motorsport]

What about if you run an e30 mix on the stage 1 93 file?

If you have the ability to run a "blended" file (You have access to E85), then you should just run the full E85 file for the convenience of filling.

no
only benefit is if you are running E85
stock pump can provide enough 91/93 octane fuel for stage 1 tune
stage 1 E85 has some issues on stock pump

stage 1+ E85 needs higher flow HPFP

Stage 1 E85 has zero issues running on the stock pump. It is limited in power due to fuel flow, but ultimately, there are no issues running the Stage 1 E85 file on your car.

Perhaps the issues are with the fact that you are running the JB4 AND our tuning - something we cannot recommend and have stated you should remove the JB4 from your car before causing irreversible damage.

If you're running into issues with our Stage 1 E85 file without your JB4 stack, then please reach out to us at [email protected] and we can look into resolving it.

-Sean@034

[kmarei]

Stage 1 E85 has zero issues running on the stock pump. It is limited in power due to fuel flow, but ultimately, there are no issues running the Stage 1 E85 file on your car.
Perhaps the issues are with the fact that you are running the JB4 AND our tuning - something we cannot recommend and have stated you should remove the JB4 from your car before causing irreversible damage.
If you're running into issues with our Stage 1 E85 file without your JB4 stack, then please reach out to us at [email protected] and we can look into resolving it.
-Sean@034

i recall a few of us were having issues with hestitation during WOT on E85 tune
i know i had it the first time i ran the E85 tune
and someone mentioned it was fuel starvation
and i believe someone from 034 suggested adding a few gallons of 93 octane to help?
bascilly dropping from E85 to E70

https://www.audizine.com/forum/showt...1#post14760161

i don't run the JB4 on the E85 tune
only when on 93 tune because i am running E30 blend, so i am adding a little boost
i have the JB4 running and zero misfires, i have looked at the logs regularly
i had the same fuel starvation mentioned above when i used map 3 (4psi extra boost) but when i switched to map 2 (3psi extra boost), never had that issue again.


right now i am on E85 tune and JB4 set to map 0
i need the JB4 because 034 has not delievred on what was annoucned earlier that would have a logging system so we would not need the JB4 just to log

[034Motorsport]

i recall a few of us were having issues with hestitation during WOT on E85 tune
i know i had it the first time i ran the E85 tune
and someone mentioned it was fuel starvation
and i believe someone from 034 suggested adding a few gallons of 93 octane to help?
bascilly dropping from E85 to E70

https://www.audizine.com/forum/showt...1#post14760161

i don't run the JB4 on the E85 tune
only when on 93 tune because i am running E30 blend, so i am adding a little boost
i have the JB4 running and zero misfires, i have looked at the logs regularly
i had the same fuel starvation mentioned above when i used map 3 (4psi extra boost) but when i switched to map 2 (3psi extra boost), never had that issue again.


right now i am on E85 tune and JB4 set to map 0
i need the JB4 because 034 has not delievred on what was annoucned earlier that would have a logging system so we would not need the JB4 just to log

This isn't something we have gotten an email from you about (issues on E85), so we cannot look into it unless you have reached out to us at [email protected]

We are offering our datalogger for diagnostic purposes currently, and again you would need to reach out to [email protected].

-Sean@034

[kmarei]

This isn't something we have gotten an email from you about (issues on E85), so we cannot look into it unless you have reached out to us at [email protected]

We are offering our datalogger for diagnostic purposes currently, and again you would need to reach out to [email protected].

-Sean@034

i only had that issue once on E85 on an earlier version of the tune, then i swapped back to the E93 tune cuz i got worried
i just went back to E85 tune one gast tank ago on the latest version of the tune
i just filled up again E85 yesterday (second tank now)
will let you know if i have that issue again
if i do, i might reach out about that data logger

thanks