Hoon
Autocross Champion
- Location
- Rhode Island
Likely the cold air (more dense, increases fuel demand)
7
Autotech HPFP DIY/Tips
- Thread starter Diggs24
- Start date
Likely the cold air (more dense, increases fuel demand)
robbiewiggs
Ready to race!
- Location
- Lombard, Illinois
Noob Alert: if I am tuned for e30, can I install this and run full e85 without a retune? What about on a 93 tune? Stock IS20...
Thanks!!
Thanks!!
Diggs24
Autocross Champion
- Location
- de plains! de plains!
- Car(s)
- 2015 GTI
Needs to be tuned for.
jimlloyd40
Autocross Champion
- Location
- Phoenix
- Car(s)
- 2018 SE DSG
Probably don't need it until you approach 400 HP. I didn't need it on mine at 362 HP.
Diggs24
Autocross Champion
- Location
- de plains! de plains!
- Car(s)
- 2015 GTI
no
Hoon
Autocross Champion
- Location
- Rhode Island
Only with ethanol above 30 %
tplociniak
Go Kart Newbie
- Location
- NEPA
- Car(s)
- 2017 Alltrack SEL
I am 1.8t, is38, UM tuned. I have a set of S3 injectors and the HPFP from a 2.0T to swap in. Would upgrading the pump allow me to run full e85 with UM's Proflex kit and custom tuning to work with the new HPFP and injectors? Trying to figure out if it makes sense to do this since the pump is already off the car.
Diggs24
Autocross Champion
- Location
- de plains! de plains!
- Car(s)
- 2015 GTI
Ask UM but I hear they do't tune HPFPs.
tplociniak
Go Kart Newbie
- Location
- NEPA
- Car(s)
- 2017 Alltrack SEL
That's the opposite response I got from the shop I was using that did the initial tune. Said they could do custom tuning to accommodate the 2.0 HPFP on the 1.8. Should probably reach out to them direct, thanks
Hoon
Autocross Champion
- Location
- Rhode Island
UM doesn't like HPFPs (for good reasons). See what they say, but start planning for MPI.
tplociniak
Go Kart Newbie
- Location
- NEPA
- Car(s)
- 2017 Alltrack SEL
Damn, was really hoping I didn't have to do that, I'm only like $250 in now for the fuel upgrades, MPI is going to 4x. Was looking at the ROW intake manifold with the injectors, rail, and harness, then getting upgraded injectors for that. No drilling into my manifold, seems like a cleaner install. Anyone have good suggestion on where to source the larger injectors for that setup?
Did this install today. I broke the stock retainer into about 5 pieces, lmao. If I were to do it again, I think I would pull the retainer up/off about 1mm, then go back and try to re-seat the bearing splitter tool to try and get it better wedged in between the spring and retainer, so it would apply even pressure across the retainer.
But like you said, not re-used anyways, oh well.
Definitely recommend an impact for the disassembly of the unit. I was doing it by hand at first and it was just starting to feel sketchy. About 1 ugga on a 18v impact was enough to get it loose.
Seems to be running fine, fuel pressure is a bit high/spikes in high rpm as talked about here with maestro tunes. But seems safe enough to drive easy until I get my Ecutek tune started.
Thanks for the DIY writeup.
But like you said, not re-used anyways, oh well.
Definitely recommend an impact for the disassembly of the unit. I was doing it by hand at first and it was just starting to feel sketchy. About 1 ugga on a 18v impact was enough to get it loose.
Seems to be running fine, fuel pressure is a bit high/spikes in high rpm as talked about here with maestro tunes. But seems safe enough to drive easy until I get my Ecutek tune started.
Thanks for the DIY writeup.
Last edited:
Klrider44
Go Kart Champion
- Location
- Bucks county PA
So I’ll be doing this install in a couple weeks...and mine didn’t come with the socket... Can you purchase it separately?