Bosch Uprated Injectors

[razr_m3]

Lol I know I know. Trying to get an LSD and safety stuff before I start making the car faster. The FiST is slowly becoming my track/weekend car. However, I feel the temptation! That S280 keeps me up at night

You're going the route I'm going. Car's at the trans shop now for the LSD, and when it gets back I'm going to throw in the S280 sitting in my closet.

 

[Raziel510]

Injectors have been installed and tune loaded. I will run it a bit and get some data logs. Hopefully the Jag HPFP is close to 200bar and Old Mike's legacy lives on.

 

[draxxus131]

Incorrect. The jag pump can just be bolted in with no immediate tuning changes needed. The injectors need to be scaled for.

The XDI pump does require custom changes but that is an entirely different aftermarket pump.

So regardless, even OEM standard injectors would need to be scaled up within the tune to take advantage of the Jag hpfp.

I'm merely running an X-37. This sounds promising.

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[Jason@dizzytuning]

So regardless, even OEM standard injectors would need to be scaled up within the tune to take advantage of the Jag hpfp.

I'm merely running an X-37. This sounds promising.

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No. No scaling needed with the stock injectors.

 

[draxxus131]

Thank you Jason for clearing that up for me.

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[Raziel510]

Update on the Jag HPFP. The car is my daily driver and it's been running great. Throttle response is quicker than before. Feels strong all the way to redline. Hopefully my tuner sees good things in the data logs. I will keep everyone posted.

 

[jessemon1106]

Update on the Jag HPFP. The car is my daily driver and it's been running great. Throttle response is quicker than before. Feels strong all the way to redline. Hopefully my tuner sees good things in the data logs. I will keep everyone posted.

Thanks for the work!

 

[jeffreylyon]

Update on the Jag HPFP. The car is my daily driver and it's been running great. Throttle response is quicker than before. Feels strong all the way to redline. Hopefully my tuner sees good things in the data logs. I will keep everyone posted.

I gotta guess that this is placebo. A richer mixture (which would be caused by more HPFP pressure) would dull throttle response. That you car is running well makes me believe that the Jag HPFP is fueling exactly the same as the OE. I hope that Jason finds something different.

 

[TyphoonFiST]

Alright wish me luck! I ordered a set of Jaguar injectors today along with extra seals so that I can attempt the 'double seal' modification myself. I figure Pumaspeed knows what they're talking about and wouldn't go through all the trouble and expense of modifying these injectors if they didn't think it was necessary. I'm a machinist and have done a lot of specialty work on lathes so I'm confident I can do it, just a little concerned about winging it with no prints or dimensions of any kind to work with. We'll see how it goes. Any tips or advice would be greatly appreciated!

So....did you end up doing this?

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[TyphoonFiST]

Hey everyone just sharing my experience: installed these last week and we are done with tuning after 4 revisions. Car holds 29psi with 2-3 degrees timing advance on 93 oct and feels so much stronger than it did on stock fuel. Turbo is S280 on stock exhaust with a Cobb high flow cat and Cobb intake.

My logs show the biggest dip in fuel rail pressure around 3-4K RPM where it drops from 2,600psi to 1,900psi, then recovers at around 4,350rpm, so HPFP seems happy for now until I start looking into ethanol.

car is a freight train and I’m extremely happy

Which ones did you install? Vendor or Rockauto?

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[TyphoonFiST]

Do the injectors need to Run the Black Stock seals or the white seals? Or are they both the same seal ....just different colors?

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[Lays]

I gotta guess that this is placebo. A richer mixture (which would be caused by more HPFP pressure) would dull throttle response. That you car is running well makes me believe that the Jag HPFP is fueling exactly the same as the OE. I hope that Jason finds something different.

Not to mention you run into knock limitation before you run out of fueling on S280 with 93 pump gas. More fuel supply doesn't fix that.

 

[Jabbit]

Do the injectors need to Run the Black Stock seals or the white seals? Or are they both the same seal ....just different colors?

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I have spares of both but they look identical.

 

[Raziel510]

So....did you end up doing this?

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Nope I just installed them exactly how they were out of the box.

 

[Raziel510]

Which ones did you install? Vendor or Rockauto?

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I bought the injectors and HPFP off Rockauto I spent $487.02.

 

[Raziel510]

Do the injectors need to Run the Black Stock seals or the white seals? Or are they both the same seal ....just different colors?

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I got the ones with the white seals, everything I read or saw mentioned as long as you transfer the spacer on the old injectors it would work fine.

 

[TyphoonFiST]

I got the ones with the white seals, everything I read or saw mentioned as long as you transfer the spacer on the old injectors it would work fine.

What I figured also....but no definite crystal clear answer there....always Vague/grey area. Go figure!

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[Raziel510]

I gotta guess that this is placebo. A richer mixture (which would be caused by more HPFP pressure) would dull throttle response. That you car is running well makes me believe that the Jag HPFP is fueling exactly the same as the OE. I hope that Jason finds something different.

My guess as to why my car feels quicker/stronger than before is the fact that these are new/clean injectors and HPFP. The OEM injectors were very dirty. But it's just my guess, hopefully I get good news from my tuner soon.

 

[carnufex]

My guess as to why my car feels quicker/stronger than before is the fact that these are new/clean injectors and HPFP. The OEM injectors were very dirty. But it's just my guess, hopefully I get good news from my tuner soon.

Any news on this?

 

[Raziel510]

Tuner says things are looking surprisingly good so far. I'm reaching the knock limit for 93 so E30 will be the next step.