I get little fluctuation in the maf at idle but normally they are under 1g/s and it follows the TPS if it is over 1g/s in variation. compare the fluctuations to the throttle position and see if they are related.

I'm not using a maf screen as my intake seems to work best without on

I'm half way to my new MAF pipe that is pushing the limits (only 4" long) it will be interesting to see if it will work.

 

Yeah my TPS doesn't change... 2% all the time.

Load changes - but I am reasoning that is an effect of the MAF fluctuations.

 

Kane, if it makes you feel any better, my car does allmost the exact same thing in regards to vacuum.

 

Kinda.... but I do still want to fix it.

 

My idle is 19" when I start it cold and goes down to 16" once it is warm, too.
Actually, it sometimes goes as low as 15" (with no loads).

My compression is high.

 

/\ pretty much the same as mine - premix seems to stop it going below 16"

 

Hmm. It seems this would be common for cars with FI

 

Probably a combination of intake restriction and exhaust pressure.

 

I'm at the Exact same point as well.. 16" idle somtimes 15" I don't know how some people are getting 19 or 20..

 

except it's like this in na and fi form. and i'm currently NA with exactly the same setup, and my engine has all new seals and housings with less than 4k miles on them.

I do see -24" when engine braking though

 

Yeah, 24" (12 PSI or about 3 PSI ABS) is normal decel.

 

when at cold start mine sits at about 20, once warm it sits about 19, my engine still has about 7k on it

 

btw: here is a link to my turbo install, some decent detailed pictures and will be updating the thread once i install my greddy profec spec 2 settings and results
https://www.rx8club.com/rx-8-multimedia-photo-gallery-6/gregs-turbo-install-pictures-161428/

 

Did you want in gregs?

 

yes please^

 

i get 18 at idle(warm engine) with 1/2 oz premix/gal. and 18 at 2K with no load on the engine(a/c, full lights etc).
vacuum is actually higher on a cold rotary than a warm one?

How often are yall looking at your w/m injectors? crud can build up on them--cleaned mine 2 days ago--one was almost occluded. Couldnt tell it by my temps.
OD

 

Also of importance - I am at 1000 feet of elevation.
When I go to LA, or someplace low, my vac goes up quite a bit.
I'll get a new number in two weeks.

What the hell is going on down there?!?!
Between the crap in your gas and fuel pump filter and your W/M nozzles, I'm starting to think you live in a mud bog.

I have my W/M nozzle out from time to time and its always pristine.

What are you pouring in there?

 

Done.

 

For sure...it shouldn't be getting crapped up at all....where is your nozzle?

 

...I don't want to know where his "nozzle" is if its getting "crapped up".

 

 

lol--good one
running boost juice from snow
nozzle pre blower and post blower
trunk mount tank.
Must live in crud land Georgia.
my nozzles and jets are steel.
maybe i shouldnt bog the 8?
OD

 

aaaaaaaand thanks for that visual

 

Kane, i posted my build thread a few days back, did you miss it?

here it is again

https://www.rx8club.com/series-i-major-horsepower-upgrades-93/bayss-turbo-thread-161787/

Also the turbo is a T4

 

Got it. Turbonetics right?