Notices

OFFICIAL: S2 Fuel Pump Thread

Old May 11, 2025 | 10:04 AM
  #51  
TeamRX8's Avatar
Thread Starter
Registered
iTrader: (25)
 
Joined: Apr 2005
Posts: 26,933
Likes: 2,139
recently released, looks to be a direct fit into the S2 pump module; 405 lph @ 60 psig




.
Reply
Old Feb 22, 2026 | 04:41 PM
  #52  
Brettus's Avatar
Boosted Kiwi
iTrader: (2)
 
Joined: Apr 2006
Posts: 20,838
Likes: 1,793
From: Y-cat-o NZ
Update :
I have the DW65C pump (mentioned in first post) plus the 65psi upgraded pressure regulator (https://www.rx8club.com/series-ii-af...2/#post4991666). Been running that combination for over a year but only recently turned up the boost to see how far this setup would take me.
So at 13psi tapering down to 12psi from 7000- 8000rpm I've found that fuel pressure drops to around 57PSI at the end of a pull.
This is running pump gas plus w/m injection and producing around 380WHP and I feel taking it much further than this is unduly risky.
Anyway ... thought this might be useful information.
Haltec Log showing fuel pressure in yellow dropping off (from 66psi peak) to 57psi at end.
Haltec Log showing fuel pressure in yellow dropping off (from 66psi peak) to 57psi at end.

Last edited by Brettus; Feb 22, 2026 at 05:45 PM.
Reply
Old Feb 23, 2026 | 07:29 PM
  #53  
TeamRX8's Avatar
Thread Starter
Registered
iTrader: (25)
 
Joined: Apr 2005
Posts: 26,933
Likes: 2,139
what a coincidence and thanks, the DW65C pump is rated 265 LPH.

was conversing with a local friend who recently purchased an RX8 with Keisler LFX V6 conversion and fitted with an S2 pump.

I’m pretty sure this would be the correct DW430C pump (rated 430 LPH) listed in post#51 supplied with filter sock for an S2 pump module. The S2 fuel pump module sock filter is interchangeable with the Mazdaspeed3. I believe this sock filter is required rather than the OE sock filter.

https://deatschwerks.com/products/9-437-1026
.

Last edited by TeamRX8; Feb 26, 2026 at 06:33 PM.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
MazdaManiac
Series I Major Horsepower Upgrades
929
Mar 15, 2026 12:48 PM
yeyo_racing
Series I Aftermarket Performance Modifications
9
Jan 24, 2019 02:13 PM
Legot
RX-8 Parts For Sale/Wanted
3
Sep 11, 2017 06:41 PM
halimsteven
Series I Major Horsepower Upgrades
7
Mar 28, 2010 07:27 PM
Reciproh8ter
Series I Tech Garage
50
Aug 7, 2008 11:11 AM


Thread Tools
Rate This Thread
Rate This Thread:
You have already rated this thread Rating: Thread Rating: 0 votes,  average.


All times are GMT -5. The time now is 08:21 AM.