Stock fuel rail question - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Engine Performance This section is for discussion on all engine building related questions.
Sponsored by:
Sponsored by:

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 02-19-2013, 01:56 AM   #1
Junior Member
Thread Starter
 
Join Date: Oct 2010
Posts: 56
Total Cats: 0
Default Stock fuel rail question

Im getting ready to install my Begi S4 kit and im kind confused on how to get around my stock fuel pressure regulator. Do i need to buy an aftermarket fuel rail to bypass the FPR. I have an AEM FPR and need some guidance.
NaBianski is offline   Reply With Quote
Old 02-19-2013, 10:03 AM   #2
Elite Member
iTrader: (3)
 
Join Date: Mar 2008
Location: Granbury, TX
Posts: 6,010
Total Cats: 583
Default

Install Megasquirt.

Install better injectors.

Sell AEM FPR.

Profit.
hornetball is offline   Reply With Quote
Old 02-19-2013, 12:20 PM   #3
Elite Member
iTrader: (1)
 
Leafy's Avatar
 
Join Date: Jun 2012
Location: NH
Posts: 9,093
Total Cats: 90
Default

I used the m-tuned rail for mine so I could ditch the fpr because the 044 pump is just way too much for the oem regulator to handle.
Leafy is offline   Reply With Quote
Old 02-19-2013, 01:44 PM   #4
Senior Member
 
Join Date: Aug 2010
Location: Arl. Texas
Posts: 937
Total Cats: 23
Default

What year car is it?
Miater is offline   Reply With Quote
Old 02-19-2013, 01:51 PM   #5
Elite Member
iTrader: (2)
 
triple88a's Avatar
 
Join Date: Apr 2006
Location: Chicago, IL
Posts: 9,131
Total Cats: 598
Default

Doing a cheap starter kit on bandaids is one thing... doing a powerful S4 kit that will rip a hole in your block on spool up on the other hand....
triple88a is offline   Reply With Quote
Old 02-19-2013, 02:23 PM   #6
Elite Member
iTrader: (3)
 
Join Date: Mar 2008
Location: Granbury, TX
Posts: 6,010
Total Cats: 583
Default

Quote:
Originally Posted by triple88a View Post
Doing a cheap starter kit on bandaids is one thing... doing a powerful S4 kit that will rip a hole in your block on spool up on the other hand....
'xactly! Don't skip the engine management.
hornetball is offline   Reply With Quote
Old 02-19-2013, 02:55 PM   #7
Elite Member
iTrader: (3)
 
AbeFM's Avatar
 
Join Date: Aug 2006
Location: San Diego, CA
Posts: 3,048
Total Cats: 8
Default

Especially when "not skimping" is like $200. You could put on an MS2 for pocket lint.
AbeFM is offline   Reply With Quote
Old 02-19-2013, 04:13 PM   #8
Junior Member
Thread Starter
 
Join Date: Oct 2010
Posts: 56
Total Cats: 0
Default

Double post
NaBianski is offline   Reply With Quote
Old 02-19-2013, 04:14 PM   #9
Junior Member
Thread Starter
 
Join Date: Oct 2010
Posts: 56
Total Cats: 0
Default

I have a 96 with a begi S4 everything done to the bottom end , MSPNP2, rx7 550cc inj, walbro 255lph pump, aem fpr
NaBianski is offline   Reply With Quote
Old 02-19-2013, 04:17 PM   #10
Senior Member
 
Join Date: Aug 2010
Location: Arl. Texas
Posts: 937
Total Cats: 23
Default

Sell the FPR and be done.
Miater is offline   Reply With Quote
Old 02-19-2013, 04:20 PM   #11
Junior Member
Thread Starter
 
Join Date: Oct 2010
Posts: 56
Total Cats: 0
Default

So stock is good enough? Really? 31 psi of fuel is enough that dosent seem right im going to be pushing 15 psi through a gt2860
NaBianski is offline   Reply With Quote
Old 02-19-2013, 04:35 PM   #12
Elite Member
iTrader: (2)
 
Join Date: Aug 2012
Location: Indianapolis
Posts: 3,325
Total Cats: 235
Default

PSI is a measure of restriction, not flow. Your 255 liter/hour pump will flow more than enough fuel.
thenuge26 is offline   Reply With Quote
Old 02-19-2013, 04:36 PM   #13
Elite Member
iTrader: (1)
 
Leafy's Avatar
 
Join Date: Jun 2012
Location: NH
Posts: 9,093
Total Cats: 90
Default

If he's only measuring 31 psi in boost either his measurement is done wrong, or the fpr is broken.
Leafy is offline   Reply With Quote
Old 02-19-2013, 04:42 PM   #14
Junior Member
Thread Starter
 
Join Date: Oct 2010
Posts: 56
Total Cats: 0
Default M

No sorry guys that fuel measurement is for a stock system stock fpr stock pump and naturall aspiration. So the consensus is to run the 255lph pump and stock fpr the turbo kit is going on now
NaBianski is offline   Reply With Quote
Old 02-19-2013, 04:50 PM   #15
Senior Member
 
Join Date: Aug 2010
Location: Arl. Texas
Posts: 937
Total Cats: 23
Default

The MS will take care of the rest for you.
Miater is offline   Reply With Quote
Old 02-19-2013, 05:14 PM   #16
Elite Member
iTrader: (2)
 
triple88a's Avatar
 
Join Date: Apr 2006
Location: Chicago, IL
Posts: 9,131
Total Cats: 598
Default

I promise you mate, you're not the first one to run 15 psi.
triple88a is offline   Reply With Quote
Old 02-19-2013, 07:16 PM   #17
Junior Member
Thread Starter
 
Join Date: Oct 2010
Posts: 56
Total Cats: 0
Default

I trust you guys thats why i came here i normally search and figure **** out myself hence my post count . I was just making sure i was reading correctly thankyou everyone
NaBianski is offline   Reply With Quote
Old 02-20-2013, 01:58 PM   #18
Senior Member
iTrader: (14)
 
Join Date: Jan 2007
Location: Murfreesboro,TN
Posts: 1,279
Total Cats: 53
Default

Quote:
Originally Posted by Leafy View Post
If he's only measuring 31 psi in boost either his measurement is done wrong, or the fpr is broken.
That is probably idle pressure. IIRC is should bump up to around 45-50 under load.
Midtenn is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Raleigh: Fiberglass headlight scope, 1.6L ECU, AFM, Hardtop latches, more bigmackloud Miata parts for sale/trade 13 09-22-2017 01:34 PM
Low oil pressure after 1.8 swap and new turbo setup JesseTheNoob DIY Turbo Discussion 15 09-30-2015 03:44 PM
"Chimney Ethanol" E100 MiataGarage Engine Performance 5 09-30-2015 12:04 AM
why is my car running like pewp? (tune/datalog) itsMikey MSPNP 3 09-28-2015 07:40 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 09:37 PM.