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 :crx:

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

Sounds like normal bandaids performance. If you dont like the MS, maybe try a motec, bosch, or pectrel.

So it's an FMU.

Yep. That's how they work.

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

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?

All you need to know about AFR - https://www.miataturbo.net/attachmen...engine-afr-pdf

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.

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.

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.

My guess is that it might be a bad translation for "cylinder wash."

As a verb 'vaning' means to wash or cleanse.

"wash"

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.

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?

https://www.miataturbo.net/attachmen...ine=1370453236

Double post.