JB4tech.com - International Turbo Tuning Discussion
(#1)
Old
mikeyoooooo mikeyoooooo is offline
Junior Member
 
Posts: 93
Join Date: Mar 2017
Car: 2013 335is 6MT
Default Port Injection or HPFP Overdrive - 09-04-2021, 04:13 PM

My turbos are starting to go and was looking to upgrade to RB Two Plus turbos and would like to run full e85. Which is the better method nowadays for full e85? PI or HPFP overdrive?
Reply With Quote
(#2)
Old
Payam @ BMS's Avatar
Payam @ BMS Payam @ BMS is offline
Super Moderator
 
Posts: 6,307
Join Date: Oct 2013
Car: e90 335i
Default 09-04-2021, 10:56 PM

Port injection 100%. You don't want to put all that stress on the DI system when it was not designed to handle those kind of pressures.


Burger Motorsports
Home of the Worlds fastest N20s, N54s, N55s, S55s, N63s, and S63s!

It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.
Reply With Quote
(#3)
Old
brendan's Avatar
brendan brendan is offline
Brendan
 
Posts: 451
Join Date: Apr 2013
Car: 335i 2007 6spdman
Default 09-05-2021, 12:24 AM

Port Injection

Do anything you can to get away from direct injection only.

Its easy and works.
Reply With Quote
(#4)
Old
zach1328's Avatar
zach1328 zach1328 is offline
Junior Member
 
Posts: 216
Join Date: May 2013
Car: 535i
Default 09-05-2021, 05:05 AM

I personally really like DI only apart from the carbon build-up issues. Regardless, I went with PI partly because I don't trust the HPFP overdrives but mostly because PI is proven. Port injection isn't only proven on the N54 platform but also many many other platforms with high HP builds.

IMO it will always remain the ultimate fueling solution. You also get the benefit of minimal carbon build-up on valves assuming you're getting into power/boost often enough for PI to kick in.

That said, if there were a highly proven aftermarket HPFP upgrade to support ~600whp on 100% E85 then I would have done it. I just don't love the idea of an OEM HPFP with overdrive. I'd want to see an actual upgraded pump with years and years and years of highly proven results on multiple platforms (as is the case with port injection).


2007 335i - JB4 + MHD BEF, RB Twos Plus, PI + Stage 3 LPFP, 100% E85, BMS DCI, VRSF **, VRSF 7.5" FMIC, VRSF CP w/ TiAL BOV, MMP inlets, VRSF aluminum outlets, XHP Stage 3, TC Kline SA, M3 F/R control arms
2008 535i
N54

Last edited by zach1328; 09-05-2021 at 05:14 AM..
Reply With Quote
(#5)
Old
mikeyoooooo mikeyoooooo is offline
Junior Member
 
Posts: 93
Join Date: Mar 2017
Car: 2013 335is 6MT
Default 09-05-2021, 09:38 AM

Looks like port injection it is! Thank you for the replies
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump




vBulletin Skin developed by: vBStyles.com
Copyright 2007 - 2022, JB4tech.com