Greetings and hallucinations!

I know I for one would be interested in the possibility of obtaining a higher volume High Pressure Fuel Pump. With the recent turbo upgrade developments and some of us switching to E85 I believe the market will be growing for this as more and more people up the power via Trifecta or the new tables HP Tuners has opened up for us recently with larger turbos and fueling changes.

There are already options for the LPFP if needed (Walbro iirc) from what BYT has posted in the past.

If enough interest is shown perhaps one of our platform supporters will see if they can help us out with an offer.

Let your interest be known!

 

Just wondering.... Even with a new fuel pump could the rest of the fuel system hold up to it, like injectors, fuel lines, seals, etc?

 

I'm looking to increase flow volume, not pressure. I've run up to 2800 psi on the injectors & fuel rail without any issues although I know of one rail failure at 2800 psi at a braised joint. Stock HPFP does best around 2200 psi on mine from the logs Vince read last week. Pumps have a flow/pressure curve and there is a sweet spot where it is the best.

So far the HPFP is the weak link for most. LPFP might be next. IDK if ZZP had to upgrade the LPFP or not on their builds, hopefully they will chime in.

 

I'll see if I can find the BMW forum post that outlined how they were incresing the fuel volume on the hpfp again. (96sunfire from the hpt boards Tom)

ETA; Might of been a VW forum? Want to say it was APR maybe.?.?.

 

The cp-e guys make a hpfp upgrade for the mazdaspeed crowd, im sure they'd be able to build something with enough interest.

 

LNF Fuel Pump Upgrade (In-Tank) - Saturn Sky Forums: Saturn Sky Forum

 

Are you talking about the mechanical pump under the hood?

 

Yes, the High Pressure Pump that's driven off the cam not the lift pump in the tank.

 

Yes the mechanical pump under the hood is the hpfp while the intank pump is a lpfp.

As stated before the mazdaspeed guys have a upgrade for theirs but that stims from the problem they run into that their pumps actually start to die in efficiency and deteriorate over time, which brought about the development of stronger hpfp internals for theirs.

 

Correct. The one mounted on the engine that is cam driven.

 

Did not read the whole thread, but based off the first post and the thread title this is not what he is talking about. This would be considered a lpfp which drives gas from the tank to the hpfp which then pressurizes it for the high flow rate that the direct injection system requires.

 

I read the tread, just pointing out what I've done already (dual fuel tank).

 

what is the hp limit of the stock Hpfp? It looks like its doing well over 550 whp.. what is your goal for upgrading this?

 

I'm still running the stock in-tank pump.

 

im still running the stock fuel system without raised rail pressure and ive made quite a bit power. zzp still runs their stock in-tank pump and im pretty sure they run the stock cam pump too.....

not to mention not all of the kappas are direct injected.

 

^^^ Yes, I understand that but for E85 we need 30% more fuel.

Thanks for posting Matt, glad the stock pumps are working for you guys.

 

e85 isnt worth it by me. its literally like a 20 cent difference from 93 and buying by the barrel is out of the question.

 

I think what most of you guys are missing is the additional need for 30% (approx) of fuel volume for Ethanol...

 

e85 is like race gas level. you cant compare 93 octane to e85. you compare with 100 octane that is around $8 gallon to e85 in the east with is prob like 2.50-3.20 max! with race gas you will make more power than e85 cause you can flow more as you guys are saying with about the same level octanes

 

I would be estatic if a HP mechanical fuel pump came out, then I could run E85 on the turbo upgrade.
Although I would only really use it for a race tune for at the strip.

 

If someone would take their car to a diesel perforamnce shop or anyone that deals with diesel engines they could probably tell you what you could do with it.

 

if you look into HPFP's and upgrade...you'll realize the 2.3L MZR ones are actually based off the VW crowds upgraded pumps. And if anyone listened to me over a year ago the VW people have upgraded injectors as well for DI. So if someone had a spare pump I'm sure you could send it off to one of a few companies and see what could be upgraded. I have a spare MZR 2.3L HPFP...but of course that does us no good.

 

But werent their pumps complete garbage to begin with?

 

someone find a new or used hpfp and take it to a diesel shop. something can be done with it

 

well considering i daily drive this thing and the closest e85 from anywhere i mostly go is a 20 minute drive in the opposite direct. your right it needs to be compared to a higher octane. i should have worded it better...im happy with my dyno numbers on an un touched fuel system...no pump upgrades, no rail pressure bump, no additional injectors nothing. so for me to go out on the limb and do upgrades for e85 its not worth the difference in price from 93 which i can pickup anywhere within 2 minutes of my commutes. one of the e85 stations sells 104 though lol.