CPI install question

[ICE_TT_3.3]

I’m beginning to collect the minimal parts for the CPI install and am not getting much help on the FB forum for 3.3l performance. I’m going to go with installing the CPI injector right off the passengers side intercooler piping at the turn and wanted to see if anyone could verify that the silicone elbow id need is just a 90 degree piece. It looks to be but making sure it isn’t something like a 110 degree. My intercooler is the stock one.

 

[Hawk853]

I’m beginning to collect the minimal parts for the CPI install and am not getting much help on the FB forum for 3.3l performance. I’m going to go with installing the CPI injector right off the passengers side intercooler piping at the turn and wanted to see if anyone could verify that the silicone elbow id need is just a 90 degree piece. It looks to be but making sure it isn’t something like a 110 degree. My intercooler is the stock one.

I have all that plumbing in a box if you need a measurement. I’m not picturing what you’re talking about though.

 

[ICE_TT_3.3]

I want to replace the stock piping in this location and in this picture


With something like this:


It’s kind of difficult from the photos but just want to make sure when I order that silicone piece that it’s supposed to be a 90 degree elbow. Thanks.

 

[ICE_TT_3.3]

I know that piece in the first photo is not stock and probably the BMS fmic but just to reference location.

 

[Hawk853]

I want to replace the stock piping in this location and in this picture
View attachment 79528

With something like this:
View attachment 79529

It’s kind of difficult from the photos but just want to make sure when I order that silicone piece that it’s supposed to be a 90 degree elbow. Thanks.

I’ll take a look at the OEM set up in a bit

 

[ICE_TT_3.3]

I appreciate it!

 

[Deviate]

Why not just get the bms piece? Curiosity...

 

[ICE_TT_3.3]

Why not just get the bms piece? Curiosity...

I’ve never looked to see if that piece is available separately from the entire fmic, but I’d assume the cost of going to be a lot higher than the silicone elbow which is around $30 and the Fuel It billet 2.5” piece that has the 1/8” bung to attach the CPI injector to.

 

[ICE_TT_3.3]

I got my answer. It’s a 90 degree elbow needed.

 

[Deviate]

I’ve never looked to see if that piece is available separately from the entire fmic, but I’d assume the cost of going to be a lot higher than the silicone elbow which is around $30 and the Fuel It billet 2.5” piece that has the 1/8” bung to attach the CPI injector to.

Sweet you found what you needed! How do you plan on setting the injector in to the silicone? Or is there a kit to do that? Ive seen the bms one first hand and its super easy considering its pre tapped. Yea im a pain. I do understand the cost factor, just dont know the headaches that may be involved with the silicone elbow. Im interested in learning.

 

[ICE_TT_3.3]

Sweet you found what you needed! How do you plan on setting the injector in to the silicone? Or is there a kit to do that? Ive seen the bms one first hand and its super easy considering its pre tapped. Yea im a pain. I do understand the cost factor, just dont know the headaches that may be involved with the silicone elbow. Im interested in learning.

No, good point and I’m contemplating not even doing it this way as I don’t think silicone is great to put fuel through unless I’m wrong. Might just have to pony up for the bms fmic or find an alternative. I’m not sure what material comes in 3” diameter and can act as a coupler that isn’t silicone.

 

[ICE_TT_3.3]

Well this is the piece that has the 1/8” bung already for the injector. It’s from Fuel It, but still would have to deal with fuel flowing through silicone as the silicone tubing would attach or couple to this piece.

 

[Hawk853]

I got my answer. It’s a 90 degree elbow needed.

It’s looking slightly obtuse to me. 100 degrees.

 

[Hawk853]

Well this is the piece that has the 1/8” bung already for the injector. It’s from Fuel It, but still would have to deal with fuel flowing through silicone as the silicone tubing would attach or couple to this piece.
View attachment 79534

you can find 90 couplings like this in inch or metric sizes…

 

[ICE_TT_3.3]

It’s looking slightly obtuse to me. 100 degrees. View attachment 79537

you can find 90 couplings like this in inch or metric sizes…
View attachment 79538

Thanks! So silicone outer but something different on the inside? Do you happen to know what that would be called or have a link to that?

 

[Deviate]

@Hawk853 @ICE_TT_3.3 please correct me if im wrong but doesn't the stock FMIC have that goofy clamp/hose set up on the "outlet" side of it? Thats where the 90 is that im pretty sure we have been talking about. That said and potentially right, why couldn't you just tap in to the metal piping after? Yes you want that injector as far as possible from throttle body to give time to atomize but that little bit of distance shouldn't matter. That way you can still use the stock stuff and at a minimal fabrication frustration. Thoughts?

Also @ICE_TT_3.3 if you actually decide to just spring for the BMS FMIC you would gain that added cooling and hp that the intercooler adds on top of the cpi.

 

[Hawk853]

@Hawk853 @ICE_TT_3.3 please correct me if im wrong but doesn't the stock FMIC have that goofy clamp/hose set up on the "outlet" side of it? Thats where the 90 is that im pretty sure we have been talking about. That said and potentially right, why couldn't you just tap in to the metal piping after? Yes you want that injector as far as possible from throttle body to give time to atomize but that little bit of distance shouldn't matter. That way you can still use the stock stuff and at a minimal fabrication frustration. Thoughts?

Also @ICE_TT_3.3 if you actually decide to just spring for the BMS FMIC you would gain that added cooling and hp that the intercooler adds on top of the cpi.

The pipe shown is the cold side charge pipe that comes up on the passenger side to the throttle body. It has a regular clamp.

That goofy clamp everyone hates is on the other side coming from the Y.

 

[Hawk853]

Thanks! So silicone outer but something different on the inside? Do you happen to know what that would be called or have a link to that?

That’s a 1/8” NPT bung silicone coupler. I can take a look around for a 90. I always have to find couplings from different sources and have lots of links saved.

The OEM piping is considerably smaller than 3” though. I can take the measurement.

As far as the material handling the injector, I’m not sure what the long term would be. I use these couplings for gauge sensors like IAT.
The bung is recessed pretty far into the coupling as well which may be a concern depending on the shape of the injector.

 

[ICE_TT_3.3]

@Hawk853 @ICE_TT_3.3 please correct me if im wrong but doesn't the stock FMIC have that goofy clamp/hose set up on the "outlet" side of it? Thats where the 90 is that im pretty sure we have been talking about. That said and potentially right, why couldn't you just tap in to the metal piping after? Yes you want that injector as far as possible from throttle body to give time to atomize but that little bit of distance shouldn't matter. That way you can still use the stock stuff and at a minimal fabrication frustration. Thoughts?

Also @ICE_TT_3.3 if you actually decide to just spring for the BMS FMIC you would gain that added cooling and hp that the intercooler adds on top of the cpi.

The fmic is looking tempting at this point.

 

[ICE_TT_3.3]

That’s a 1/8” NPT bung silicone coupler. I can take a look around for a 90. I always have to find couplings from different sources and have lots of links saved.

The OEM piping is considerably smaller than 3” though. I can take the measurement.

As far as the material handling the injector, I’m not sure what the long term would be. I use these couplings for gauge sensors like IAT.
The bung is recessed pretty far into the coupling as well which may be a concern depending on the shape of the injector.

Ok thanks. Yeah I’m more worried than anything about the fuel spraying in the silicone and potentially causing a fire if the material degrades enough and I can’t see it happening.