Injectors for a 124

[06roadglide]

What injectors are available for a 2006?
It's going in a 124 with a 55/58 max flow 1.8 HPI.  I know, probably to small of TB for a 124 but it's what I have for now.
I currently have a set of 5.3 injectors but I can't find anything bigger. I was thinking about 6.2

[2006FXDCI]

FWIW i run a HPI 55mm on my 124" with 6.2's . Makes mid 140 hp and tq . I dont think your maxflo will be a bottleneck

[06roadglide]

That's good to know, thanks.
A larger TB surely isn't in the budget

[hrdtail78]

Here is equal to 6.3's
http://www.fiveomotorsport.com/m50-50lb-harley-davidson

[06roadglide]

Here is equal to 6.3's
http://www.fiveomotorsport.com/m50-50lb-harley-davidson

Thanks!
Has anyone used this injector?

[hrdtail78]

I haven't used that injector.  I have used the M42 and some other injectors from them.  No complaints or injector issues. 

[joe_lyons]

These might work also.
http://www.siemensdeka.com/product-category/fuel-injectors/

[JohnCA58]

That's good to know, thanks.
A larger TB surely isn't in the budget

I wouldn't worry one bit about the size of your TB,  I am running a HPi 55mm with 6.2 inj.  No problem with power here either.

[06roadglide]

That's good to know, thanks.
A larger TB surely isn't in the budget

I wouldn't worry one bit about the size of your TB,  I am running a HPi 55mm with 6.2 inj.  No problem with power here either.

What year is yours? 06-07 seem to be a bastard years for injectors. Not many options for them. Heck, until this thread I thought there was only one.

Thinking I should get a pressure regulator from HPI also.  Unless you guys think that would be to much with a 6.2 injector.

[JohnCA58]

That's good to know, thanks.
A larger TB surely isn't in the budget

I wouldn't worry one bit about the size of your TB,  I am running a HPi 55mm with 6.2 inj.  No problem with power here either.

What year is yours? 06-07 seem to be a bastard years for injectors. Not many options for them. Heck, until this thread I thought there was only one.

Thinking I should get a pressure regulator from HPI also.  Unless you guys think that would be to much with a 6.2 injector.

I am running the HPi MM 55mm TB with Delphi HPi injector 6.2 ,  also using HPi regulator.

[hrdtail78]

What cam are you running?

[06roadglide]

662-2

[hrdtail78]

I don't think the reg is necessary, but can be taken out if it does give you problems. 

Kind of hit it in the middle with that cam.  Was wondering if you were going all out HP.

[06roadglide]

No real goals set for hp/tq.  I'm just trying to use most of my parts from my 117 that I can.
I went into this just to freshen up a 50k mile 117 and found my rings were shot and cylinders in bad shape. I didn't feel good about boring and reusing the cylinders so if I'm gonna by new ones I might as well go bigger, sold my 4.375 flywheel to cover half the cost of the new 4.625 wheel.

[Desertwndrr]

In my 2007 I'm running an HPI 58mm with 6.2 injectors that I picked up from the Chevy dealer for half of what they cost from HD.  I'm also getting 132/138.  Your throttle body is fine.  I actually wish that I used a 55mm as the 58mm is a bit touchy.  Not sure if these injectors would work for you, but they were pretty inexpensive.

[HighLiner]

What's the GM part #?

[Desertwndrr]

GM 12613412

[06roadglide]

GM 12613412

Are you using a high pressure regulator with that injector?
in order to get  6.2gps that injector needs 400kpa (58 psi)

Harley sells that injector, part # 27400002   27400004

[Desertwndrr]

I'm using whatever regulator came stock in a 2007 CVO Softail.  I didn't change anything in the fuel tank.

[joe_lyons]

The GM injectors 12613412 are 42 pounds per hour injectors/ 5.3 g/s

[Tq Monster]

Does anyone know which model of GM injectors would be compatible with an 08 and up throttle body 5.3 g/s ? Thanks

[hrdtail78]

The GM injectors 12613412 are 42 pounds per hour injectors/ 5.3 g/s

4 bar

[joe_lyons]

The GM injectors 12613412 are 42 pounds per hour injectors/ 5.3 g/s

4 bar

This is what I found. Kind of conflicting

[joe_lyons]

I thought harley injectors were also rated at 43.5 psi?  Or are they rated at 4 bar?

[06roadglide]

You found the same stuff I found joe.
Harley gives the spec at 400kpa which comes out to about 58psi.

[06roadglide]

In the column that says its 6.2gps, above that says, (static) @ 400kpa

[joe_lyons]

I have been living a lie

[Desertwndrr]

The GM injectors 12613412 are 42 pounds per hour injectors/ 5.3 g/s

In the SE catalog these are listed at 6.2g/s.  Whatever the pressure truly is, they were fairly inexpensive from the local GM dealer.  I just wish that they fit my touring TBW intake.

[joe_lyons]

Look in the direction of Ford

[joe_lyons]

The GM injectors 12613412 are 42 pounds per hour injectors/ 5.3 g/s

In the SE catalog these are listed at 6.2g/s.  Whatever the pressure truly is, they were fairly inexpensive from the local GM dealer.  I just wish that they fit my touring TBW intake.

Iwp 069

[Desertwndrr]

The GM injectors 12613412 are 42 pounds per hour injectors/ 5.3 g/s

In the SE catalog these are listed at 6.2g/s.  Whatever the pressure truly is, they were fairly inexpensive from the local GM dealer.  I just wish that they fit my touring TBW intake.

Iwp 069

Stock is a 4-hole injector and the IWP069 injector is single hole.  I would assume that spray pattern can be a big factor.  I'm not educated enough about the engineering of it all and whether or not the change to the IWP injector would be an issue.  I used the GM injector as it was simply relabeled and repackaged for HD sale.

[1FSTRK]

The stock Harley regulator runs the pressure at 4 bar, running on the dyno the pressure will usually vary from 55lbs  an 62lbs during the run.

[hrdtail78]

Does anyone know which model of GM injectors would be compatible with an 08 and up throttle body 5.3 g/s ? Thanks

I have tried to cross reference this injector.  I have had no luck.  I think the stage 1 on this sight is the same, but HD is less money.  If you find something.  Let me know.

http://www.injector.com/cart/pc/viewPrd.asp?idproduct=101&idcategory=15

[Tq Monster]

I will let you know if I find something but as of now I'm the same boat as you when I think I've found a solution it ends up being more expensive than the HD version!

[joe_lyons]

What about the Siemens deka ones?

[whittlebeast]

Injector flow is normally rated at 300 kpa or 3 atmospheres pressure differential.  This works out to about 44psi.  Changing from 44 psi to 60 psi results in about a 15% increase in flow for the injector.

In the Android world, I use android program called EFI Math as a quick and dirty converter.

Some injector websites  give two flow ratings, 3 and 4 atm.

The white elephant in the room is the injector opening time or dead time.  This can be quite different from one injector to the next and the setting in in one of the Harley Hidden Tables.  This setting is very sensitive to battery voltage and all hidden from view in the Harley world.

Andy

[hrdtail78]

How does this really effect a low impedance injector that IDC is kept below 80%.  Most don't messed with this table.  Even if it is exposed.  I thought that this elephant was kept in check by the rule of thumb of 80% IDC?

BTW  I really don't see these as hidden tables.  I look at them as tables that aren't exposed.  It seems in this industry that what we can record, and manipulate is different between the different tuners.  Someday a product will come out with all of this exposed.  We will pick the channels we want to record.  We will set up pids and we will generate new based on our input.  I just hope what happened to that industry doesn't have to happen here in order for that to happen.

[whittlebeast]

The opening/dead time is a big deal at idle, low loads and tip-in.  At high DC, it is not really an issue.

[Coyote]

So you are saying that the varying opening/dead time creates a bigger percentage of error at low duty cycles than it does at high duty cycles?