Auxjection
Thread Starter
Instructor
Joined: Feb 2021
Posts: 163
Likes: 42
Auxjection
Seems promising - what do we think
AuxJection | LT4 Stock Supercharger Auxiliary Fuel Injection System – Wisher Performance
AuxJection | LT4 Stock Supercharger Auxiliary Fuel Injection System – Wisher Performance
Safety Car
Joined: Mar 2004
Posts: 4,048
Likes: 1,476
From: South Florida
I think its going to replace meth injection and allow for full E85 for many builds. I know a couple of clients who are considering pulling the trigger and ditching the meth so I should know more about the limits soon.
Advanced
Joined: Nov 2014
Posts: 92
Likes: 10
From: Moore, OK
Seems promising - what do we think
AuxJection | LT4 Stock Supercharger Auxiliary Fuel Injection System – Wisher Performance
AuxJection | LT4 Stock Supercharger Auxiliary Fuel Injection System – Wisher Performance
I’ve been waited on this product ever since it was teased in December 2025. My kit arrived 2 weeks ago and I immediately installed it. Super simple and straight forward.
Current mods:
Kong X ported factory blower
NX blower lid with meth injection into lid
Running 100% meth, not 50/50 boost juice
2.3 upper
9.2 lower
dsx flex on e50 blend
dsx aux low side 320lph pump
tsp blower cam with 32% fuel lobe
Rotofab CAI
103 NW throttle body
headers, catless X pipe, Borla Atak catback
FI interchiller
I might be forgetting something but you get the idea.
After installing Caleb Wisher’s kit, I ditched my entire meth setup and uninstalled the Dsx flex sensor. I opted to use the sensor Caleb’s kit had.
Tuning was also straight forward. My tuner, Derek Dunbar, had me dialed in within 3 revisions. No brainer to install. Just pinning 2 wires to the ECU. 1 of them was replacing my current ethanol sensor wire. You just have to install a custom OS via HP Tuner’s that Caleb emails over.
I’m now running on full E85 (it’s actually testing at 87% at the good gas station nearby).
I’m open for any questions. Ask away!
Racer
Joined: Mar 2017
Posts: 297
Likes: 67
From: Coweta, OK
Here’s my short write up from the Tech/Perf group:
I’ve been waited on this product ever since it was teased in December 2025. My kit arrived 2 weeks ago and I immediately installed it. Super simple and straight forward.
Current mods:
Kong X ported factory blower
NX blower lid with meth injection into lid
Running 100% meth, not 50/50 boost juice
2.3 upper
9.2 lower
dsx flex on e50 blend
dsx aux low side 320lph pump
tsp blower cam with 32% fuel lobe
Rotofab CAI
103 NW throttle body
headers, catless X pipe, Borla Atak catback
FI interchiller
I might be forgetting something but you get the idea.
After installing Caleb Wisher’s kit, I ditched my entire meth setup and uninstalled the Dsx flex sensor. I opted to use the sensor Caleb’s kit had.
Tuning was also straight forward. My tuner, Derek Dunbar, had me dialed in within 3 revisions. No brainer to install. Just pinning 2 wires to the ECU. 1 of them was replacing my current ethanol sensor wire. You just have to install a custom OS via HP Tuner’s that Caleb emails over.
I’m now running on full E85 (it’s actually testing at 87% at the good gas station nearby).
I’m open for any questions. Ask away!
I’ve been waited on this product ever since it was teased in December 2025. My kit arrived 2 weeks ago and I immediately installed it. Super simple and straight forward.
Current mods:
Kong X ported factory blower
NX blower lid with meth injection into lid
Running 100% meth, not 50/50 boost juice
2.3 upper
9.2 lower
dsx flex on e50 blend
dsx aux low side 320lph pump
tsp blower cam with 32% fuel lobe
Rotofab CAI
103 NW throttle body
headers, catless X pipe, Borla Atak catback
FI interchiller
I might be forgetting something but you get the idea.
After installing Caleb Wisher’s kit, I ditched my entire meth setup and uninstalled the Dsx flex sensor. I opted to use the sensor Caleb’s kit had.
Tuning was also straight forward. My tuner, Derek Dunbar, had me dialed in within 3 revisions. No brainer to install. Just pinning 2 wires to the ECU. 1 of them was replacing my current ethanol sensor wire. You just have to install a custom OS via HP Tuner’s that Caleb emails over.
I’m now running on full E85 (it’s actually testing at 87% at the good gas station nearby).
I’m open for any questions. Ask away!
Racer
Joined: Oct 2001
Posts: 466
Likes: 27
From: Hendersonville tn
Do you think fuel will fall out of suspension being injected at the beginning of the intake track? Will fuel be evenly distributed between cylinders?
Pro
Joined: Nov 2021
Posts: 515
Likes: 187
From: Pittsburgh, PA
They have a write up where they tested the fuel distribution on an engine dyno and fuel distribution between all the cylinder was pretty even.
https://www.wisherperformance.com/bl...esting-results
https://www.wisherperformance.com/bl...esting-results
Pro
Joined: Nov 2021
Posts: 515
Likes: 187
From: Pittsburgh, PA
Here’s my short write up from the Tech/Perf group:
I’ve been waited on this product ever since it was teased in December 2025. My kit arrived 2 weeks ago and I immediately installed it. Super simple and straight forward.
Current mods:
Kong X ported factory blower
NX blower lid with meth injection into lid
Running 100% meth, not 50/50 boost juice
2.3 upper
9.2 lower
dsx flex on e50 blend
dsx aux low side 320lph pump
tsp blower cam with 32% fuel lobe
Rotofab CAI
103 NW throttle body
headers, catless X pipe, Borla Atak catback
FI interchiller
I might be forgetting something but you get the idea.
After installing Caleb Wisher’s kit, I ditched my entire meth setup and uninstalled the Dsx flex sensor. I opted to use the sensor Caleb’s kit had.
Tuning was also straight forward. My tuner, Derek Dunbar, had me dialed in within 3 revisions. No brainer to install. Just pinning 2 wires to the ECU. 1 of them was replacing my current ethanol sensor wire. You just have to install a custom OS via HP Tuner’s that Caleb emails over.
I’m now running on full E85 (it’s actually testing at 87% at the good gas station nearby).
I’m open for any questions. Ask away!
I’ve been waited on this product ever since it was teased in December 2025. My kit arrived 2 weeks ago and I immediately installed it. Super simple and straight forward.
Current mods:
Kong X ported factory blower
NX blower lid with meth injection into lid
Running 100% meth, not 50/50 boost juice
2.3 upper
9.2 lower
dsx flex on e50 blend
dsx aux low side 320lph pump
tsp blower cam with 32% fuel lobe
Rotofab CAI
103 NW throttle body
headers, catless X pipe, Borla Atak catback
FI interchiller
I might be forgetting something but you get the idea.
After installing Caleb Wisher’s kit, I ditched my entire meth setup and uninstalled the Dsx flex sensor. I opted to use the sensor Caleb’s kit had.
Tuning was also straight forward. My tuner, Derek Dunbar, had me dialed in within 3 revisions. No brainer to install. Just pinning 2 wires to the ECU. 1 of them was replacing my current ethanol sensor wire. You just have to install a custom OS via HP Tuner’s that Caleb emails over.
I’m now running on full E85 (it’s actually testing at 87% at the good gas station nearby).
I’m open for any questions. Ask away!
What kind of power does your car make? My setup is almost the same as yours but I am pullied a little harder. 2.25" Upper and 9.45" lower. I have the twin M15 meth into the intake tube. TSP cam as well but I have more high side with the Katech Goliath HPFP and XDI +30% injectors. I ordered the Magnuson 2650 and the Wisher kit for it as well. We are going to see if this system can handle 1000-1025rwhp on full E85.
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Thread Starter
Instructor
Joined: Feb 2021
Posts: 163
Likes: 42
So what I'm gathering is that this is really made to replace meth systems on these cars and you won't really see the benefits until you have your low side upgraded in some way. Or if you just wanted to save $ vs full port setup.
Advanced
Joined: Nov 2014
Posts: 92
Likes: 10
From: Moore, OK
Exactly. In my opinion, there’s 3 fueling strategies at the 900whp level.
port + low side
aux injection + low side
meth + low side
The top 2 above allow for running full e85. The bottom option still restricts you to an e50-ish blend.
Of course a cam with a bigger fuel lobe in all 3 applications is beneficial.
And I didn’t mention upgraded DI injectors or HPFP because that doesn’t seem to be the popular, cost effective route.
port + low side
aux injection + low side
meth + low side
The top 2 above allow for running full e85. The bottom option still restricts you to an e50-ish blend.
Of course a cam with a bigger fuel lobe in all 3 applications is beneficial.
And I didn’t mention upgraded DI injectors or HPFP because that doesn’t seem to be the popular, cost effective route.
Last edited by klonsbury5; May 11, 2026 at 10:02 AM.
Pro
Joined: Nov 2021
Posts: 515
Likes: 187
From: Pittsburgh, PA
Exactly. In my opinion, there’s 3 fueling strategies at the 900whp level.
port + low side
aux injection + low side
meth + low side
The top 2 above allow for running full e50. The bottom option still restricts you to an e50-ish blend.
Of course a fuel cam in all 3 applications is beneficial.
And I didn’t mention upgraded DI injectors or HPFP because that doesn’t seem to be the popular, cost effective route.
port + low side
aux injection + low side
meth + low side
The top 2 above allow for running full e50. The bottom option still restricts you to an e50-ish blend.
Of course a fuel cam in all 3 applications is beneficial.
And I didn’t mention upgraded DI injectors or HPFP because that doesn’t seem to be the popular, cost effective route.
Pro
Joined: Jun 2015
Posts: 550
Likes: 102
From: Madison WI
Currently I am at 925rwhp on full E85, there is no such thing as Full E50. I have a DSX low side with their 320lph pump, Katech Goliath, XDI+ 30% injectors with an Alky Control dual M15 meth kit and I am very close to being out of fuel again. I ordered the Wisher AuxJection kit and we will see if I can push it to 1000-1025 rwhp on full E85 and ditching the meth. If it handles it then possibly E90. We will see...
Pro
Joined: Nov 2021
Posts: 515
Likes: 187
From: Pittsburgh, PA
Racer
Joined: Mar 2017
Posts: 297
Likes: 67
From: Coweta, OK
it's a budget way to support more fuel.
But lowering it to "replacing meth" is kind of a disservice in my opinion. It's like saying Port Injection is a replacement for meth.
it's definitely a saving compared to Port and it is having promising results from numerous tuners now.
Pro
Joined: Nov 2021
Posts: 515
Likes: 187
From: Pittsburgh, PA
I disagree with this being a replacement for meth. (just my opinion, not meant as argumentative)
it's a budget way to support more fuel.
But lowering it to "replacing meth" is kind of a disservice in my opinion. It's like saying Port Injection is a replacement for meth.
it's definitely a saving compared to Port and it is having promising results from numerous tuners now.
it's a budget way to support more fuel.
But lowering it to "replacing meth" is kind of a disservice in my opinion. It's like saying Port Injection is a replacement for meth.
it's definitely a saving compared to Port and it is having promising results from numerous tuners now.
Pro
Joined: Nov 2021
Posts: 515
Likes: 187
From: Pittsburgh, PA