Need Input AFR on boost - 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 06-05-2013, 11:35 AM   #1
Newb
Thread Starter
 
Join Date: Mar 2012
Posts: 10
Total Cats: -18
Default Need Input AFR on boost

one simple question for the bandaids Guru
Setup

1990 1.6 stock engine
Greddy turbo kit running 9 PSI intercooled
1.8 tan top injector
MSD Boost timming box
Begi FPR
AEM wideband

Watever I do with the FPR my result a pretty mutch always de same

exemple:

perfect Idle between 14.3-15.5
perfect wile building boost (between 3-4K) 12.5-13.2
Perfect in boost between 4-5k 12.2-12.8


then its start to run richer and richer and richer all to way to the minimum reading of the AEM 10.0 at 6K rpm sp basicaly I have a 1200 rpm power band LOL

what can cause this ? Ive done couples of serch and didnt find nothing revelant

Thanks

Ps: do not want a MS, already got one in my Mr2 and hate it
vortx is offline   Reply With Quote
Old 06-05-2013, 11:38 AM   #2
Elite Member
iTrader: (3)
 
concealer404's Avatar
 
Join Date: Aug 2011
Posts: 8,465
Total Cats: 783
Default

Welcome to running band-aids.

The BeGi FPR is a RRFPR, yes?
concealer404 is offline   Reply With Quote
Old 06-05-2013, 12:07 PM   #3
Newb
Thread Starter
 
Join Date: Mar 2012
Posts: 10
Total Cats: -18
Default

Quote:
Originally Posted by concealer404 View Post
Welcome to running band-aids.

The BeGi FPR is a RRFPR, yes?
raising rate YES

with 2 vaccum niple , one is on a vaccum line and the other vent in the atmosphere with a check valve like this at page 6

http://www.bellengineering.net/templ...structions.pdf
vortx is offline   Reply With Quote
Old 06-05-2013, 12:45 PM   #4
Elite Member
iTrader: (1)
 
Leafy's Avatar
 
Join Date: Jun 2012
Location: NH
Posts: 9,093
Total Cats: 90
Default

Sounds like normal bandaids performance. If you dont like the MS, maybe try a motec, bosch, or pectrel.
Leafy is offline   Reply With Quote
Old 06-05-2013, 12:52 PM   #5
Elite Member
iTrader: (3)
 
concealer404's Avatar
 
Join Date: Aug 2011
Posts: 8,465
Total Cats: 783
Default

Quote:
Originally Posted by vortx View Post
raising rate YES

with 2 vaccum niple , one is on a vaccum line and the other vent in the atmosphere with a check valve like this at page 6

http://www.bellengineering.net/templ...structions.pdf

So it's an FMU.

Yep. That's how they work.
concealer404 is offline   Reply With Quote
Old 06-05-2013, 12:53 PM   #6
Newb
Thread Starter
 
Join Date: Mar 2012
Posts: 10
Total Cats: -18
Default

Quote:
Originally Posted by Leafy View Post
Sounds like normal bandaids performance. If you dont like the MS, maybe try a motec, bosch, or pectrel.
I lol'd Motec for a street car...,

but on a serious note If the boost stay the same between 4 an 7K rpm the fuel pressure so the AFR should stay pretty much the same even with just an FPR/FMU
vortx is offline   Reply With Quote
Old 06-05-2013, 12:56 PM   #7
Elite Member
iTrader: (3)
 
concealer404's Avatar
 
Join Date: Aug 2011
Posts: 8,465
Total Cats: 783
Default

Think about it.

What do your AFRs do in that rev range on a stock car with stock injectors? They go rich.

You now have bigger injectors, with more pressure being given as your boost rises. On TOP of what your stock fuel map already does.

So what are we trying to figure out again?
concealer404 is offline   Reply With Quote
Old 06-05-2013, 01:11 PM   #8
Elite Member
iTrader: (10)
 
soviet's Avatar
 
Join Date: Jan 2010
Location: VA
Posts: 3,519
Total Cats: 260
Default

soviet is offline   Reply With Quote
Old 06-05-2013, 01:37 PM   #9
Senior Member
iTrader: (14)
 
Join Date: Jan 2007
Location: Murfreesboro,TN
Posts: 1,279
Total Cats: 53
Default

Quote:
Originally Posted by soviet View Post
Where was that chart two years ago? haha I'll be using that one to tweak my AF tables once my car is off the jack stands again.
Midtenn is offline   Reply With Quote
Old 06-05-2013, 01:45 PM   #10
Newb
Thread Starter
 
Join Date: Mar 2012
Posts: 10
Total Cats: -18
Default

Quote:
Originally Posted by concealer404 View Post
Think about it.

What do your AFRs do in that rev range on a stock car with stock injectors? They go rich.

You now have bigger injectors, with more pressure being given as your boost rises. On TOP of what your stock fuel map already does.

So what are we trying to figure out again?
what do happen at exactly 5000 rpm that put that much fuel , thats the only question

thing is watever the boost I put on the car 5Psi to 10 psi , the same thing appen over 5K ...

Idle is good cruising is perfect But over 5K watever the presure i put on the regulator or on the needle valve ajustment same thing happen
vortx is offline   Reply With Quote
Old 06-05-2013, 01:48 PM   #11
Elite Member
iTrader: (3)
 
concealer404's Avatar
 
Join Date: Aug 2011
Posts: 8,465
Total Cats: 783
Default

Quote:
Originally Posted by vortx View Post
what do happen at exactly 5000 rpm that put that much fuel , thats the only question

thing is watever the boost I put on the car 5Psi to 10 psi , the same thing appen over 5K ...

Idle is good cruising is perfect But over 5K watever the presure i put on the regulator or on the needle valve ajustment same thing happen
I don't know. Put the car back to 100% stock, use the wideband, tell me what happens.

Think about it, with your setup, you're already running more fuel than stock. The more boost you run, the more fuel you get.

Bread goes in, toast comes out. You can't explain that!



I feel like i'm getting AIDS just from staying in this thread this long, and i'm even the one crowned as "The Prince of Band-Aids" on this forum.

The only difference is that my AFRs don't suck dick.
concealer404 is offline   Reply With Quote
Old 06-05-2013, 01:59 PM   #12
Elite Member
iTrader: (2)
 
Mobius's Avatar
 
Join Date: May 2008
Location: Portland, Oregon
Posts: 3,178
Total Cats: 267
Default

I had not seen that chart before. Who created it? Where did the term "fuel vaning" come from? Google fails to find me any relevant hits other than that pdf itself.
Mobius is offline   Reply With Quote
Old 06-05-2013, 02:00 PM   #13
Elite Member
iTrader: (3)
 
concealer404's Avatar
 
Join Date: Aug 2011
Posts: 8,465
Total Cats: 783
Default

My guess is that it might be a bad translation for "cylinder wash."
concealer404 is offline   Reply With Quote
Old 06-05-2013, 02:02 PM   #14
Elite Member
iTrader: (2)
 
Join Date: Aug 2012
Location: Indianapolis
Posts: 3,325
Total Cats: 235
Default

As a verb 'vaning' means to wash or cleanse.
thenuge26 is offline   Reply With Quote
Old 06-05-2013, 02:19 PM   #15
Newb
Thread Starter
 
Join Date: Mar 2012
Posts: 10
Total Cats: -18
Default

Quote:
Originally Posted by Mobius View Post
I had not seen that chart before. Who created it? Where did the term "fuel vaning" come from? Google fails to find me any relevant hits other than that pdf itself.
"wash"
vortx is offline   Reply With Quote
Old 06-05-2013, 02:20 PM   #16
Newb
Thread Starter
 
Join Date: Mar 2012
Posts: 10
Total Cats: -18
Default

Quote:
Originally Posted by concealer404 View Post
I don't know. Put the car back to 100% stock, use the wideband, tell me what happens.

Think about it, with your setup, you're already running more fuel than stock. The more boost you run, the more fuel you get.

Bread goes in, toast comes out. You can't explain that!



I feel like i'm getting AIDS just from staying in this thread this long, and i'm even the one crowned as "The Prince of Band-Aids" on this forum.

The only difference is that my AFRs don't suck dick.
not sure about you or your AFr sucking dicks but still thanks for not awsering my simple question
vortx is offline   Reply With Quote
Old 06-05-2013, 02:23 PM   #17
Elite Member
iTrader: (3)
 
concealer404's Avatar
 
Join Date: Aug 2011
Posts: 8,465
Total Cats: 783
Default

Quote:
Originally Posted by vortx View Post
not sure about you or your AFr sucking dicks but still thanks for not awsering my simple question

I've answered your question at least twice in this very thread.

No need to get angry because you have a reading comprehension problem.
concealer404 is offline   Reply With Quote
Old 06-05-2013, 02:25 PM   #18
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,198
Total Cats: 2,584
Default

Q: why do my AFR's suck?
A: because you have a terrible setup.

Q: what can I do to fix this?
A: change your terrible setup.

-But I don't want to change my setup because I'm too cheap, ignorant, and stupid.
-No problem, enjoy your terrible AFR's.






Does that make sense now OP?
18psi is offline   Reply With Quote
Old 06-05-2013, 02:27 PM   #19
Elite Member
iTrader: (3)
 
concealer404's Avatar
 
Join Date: Aug 2011
Posts: 8,465
Total Cats: 783
Default

Quote:
Originally Posted by concealer404 View Post
Think about it.

What do your AFRs do in that rev range on a stock car with stock injectors? They go rich.

You now have bigger injectors, with more pressure being given as your boost rises. On TOP of what your stock fuel map already does.

So what are we trying to figure out again?
Quote:
Originally Posted by concealer404 View Post
I don't know. Put the car back to 100% stock, use the wideband, tell me what happens.

Think about it, with your setup, you're already running more fuel than stock. The more boost you run, the more fuel you get.

Bread goes in, toast comes out. You can't explain that!



I feel like i'm getting AIDS just from staying in this thread this long, and i'm even the one crowned as "The Prince of Band-Aids" on this forum.

The only difference is that my AFRs don't suck dick.
Quote:
Originally Posted by vortx View Post
not sure about you or your AFr sucking dicks but still thanks for not awsering my simple question


Attached Thumbnails
Need Input AFR on boost-40800-aubergine.jpg  
concealer404 is offline   Reply With Quote
Old 06-05-2013, 02:33 PM   #20
Elite Member
iTrader: (3)
 
concealer404's Avatar
 
Join Date: Aug 2011
Posts: 8,465
Total Cats: 783
Default

Double post.
Attached Thumbnails
Need Input AFR on boost-40800-aubergine.jpg  
concealer404 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Project Gemini - Turbo Civic on the Cheap Full_Tilt_Boogie Build Threads 59 12-15-2017 09:00 PM
LucaCarMods's Boosted Dutch Miata Build! LucaCarMods Build Threads 11 02-14-2016 07:13 AM
My solution for Oiltemp and Oilpressure input into Megasuirt (MS3) Zaphod MEGAsquirt 41 01-24-2016 01:25 PM
Going back to stock. Need some 1.6 parts. Trent WTB 2 10-01-2015 01:15 PM
Bad head gasket or ? shooterschmidty Engine Performance 8 09-30-2015 11:28 PM


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 12:29 AM.