so Their is nothing to be afraid of ?!
because I get bored to reset my PCM because I got CEL easyly

 

I reset my PCM by pulling the room fuse the day before my track day the car felt stronger for alittle while but then the boost was all over the place and it definately felt down on power, it was however 114 track temps so that might have had alot to do with it...

 

rote you lean spike is normal (on your attachment)--happens when you close the throttle. There is a little "lag" time in the data from the oem o2 sensor recording. normal pettit a/f's at idle are mid 14's like everyone elses. I am retarded when it come to tuning but the data I have collected from a na car and my car there is not a lot of difference in the a/f's---only in the timing.

Hey Hylmie baby--yep i dont have any hesitations after warm up. At times before full warmup i can get a off idle light acceleration lag of 1/2 sec or so.

Rote8 --Keep the track intake temps below 130F or you will lose power--check the water meth nozzles--they can get clogged contrary as to what others may say.
olddragger

 

Yea I didn't notice the check valve in the stock hose. Had a piece laying around cut to perfect length and just used that.
Do you guys think the brake booster may have actually been damaged? No vacuum in the booster would cause damage?

 

Walboro 255lph in,,,

 

I don't believe no vacuum would cause damage, as that is what happens when you pump the pedal a few times with the engine off - all the vacuum gets "used". I don't think the increased pressure in there when you have been under boost would cause an issue, but I cannot be sure. I would think the mechanicals of these things (critical systems) would be a little (lot!!) more robust than that.

I don't think you have any problems other than...

• The wistling noises - A vacuum leak sounds plausible, and potentially related to the next one...
• The stall on closed thottle following high RPM's - I have heard you guys have that, but I believe my system doesn't suffer. I reckon it is potentially MAF related. I run a stock MAF. When I didn't, I had the problem.
• The big flat spot on Throttle tip-in.

Cheers,
Hymee.

 

The lean spike shown is from the aux ports opening . He needs to add fuel in that rev range to minimise that spike.
The first lean spike on the second chart is from throttle tip in - the second from the aux ports again .
You are correct that lean spike often occurs when closing the throttle but I don't think that is what we are seeing here ...

 

they were talking about lean spikes below 3K. Started a couple post before. Thats what i was referred too--like i said i am a tuning retard.

GUESS WHAT I HAVE IN MY GRIMELY OLD SUN SPOTTED HANDS AND I AM GRINNING SO BIG YOU CAN SEE WHERE THAT SARGENT IN DANANG KNOCKED OUT A JAW TOOTH!!!!!
I see how Cam modified the yellows too.
olddragger

 

me too, and for the past few months I haven't been able to bosst past 6.5psi,,,

 

then you either have a leak, belt slip or a motor problem. tuning doesn't affect boost on a SC.

 

I know I know,,, Im hoping its not the later,,,

 

whats your vacuum reading?
i am still at 17.5 at idle and at 2 k with no load i am at 21 (love centrifugal force!)
is your pulley on tight? still have high trims? Whats upppppppp?
OD

 

I know Moon expressed concern over the high trims as well,
as for my idle still 17.5-18 at idle, 2Krpms 21lbs like you,,,
I did pull my room fuse to reset the pcm last week, but my trims should indicate that,,,

 

Hey, my trims beat your trims.
I am hitting 20 on trims before pulling the ROOM fuse.
My car is the king of LTT.

We need a trim competition.

I idle at between 18 and 20, and hit 28 on deceleration.
Interesting you call it a "flat spot", I guess you can call it that, but my car sometimes breaks the tires loose leaving said "flat spot". (it's brutal on your neck right at "tip in")

Olddragger,
I have suspected my boost side nozzle was not putting out, when running methanol, my pre blower intake freezes over faster than my upper intake. (the per-blower nozzle is a 60, the upper intake is a 175)

 

Can you guys fine-fine your MAF calibration to get the trims back to within 5%?

Cheers,
Hymee.

 

my trim is was below 3 at steady state (open and closed loop). Now that i added a larger air filter and ported the TB my trim is 3.1 with a "spike" at rare times of 4.5.
Glad I am going with Cam's injectors---high trims + 100% duty cycle cant be good?
OD

 

COULDNT STAND IT!!!
Boost kit going on today
Hopefully my lower intake will go on(see images)
I think I have discovered an easy fix for the motormounts.
When I pulled my header just now my ports looked really good and very little carbon.
x fingers --time to get back on it.
olddragger

https://www.rx8club.com/attachment.p...3&d=1247184393
https://www.rx8club.com/attachment.p...6&d=1232893828
https://www.rx8club.com/attachment.p...1&d=1232893430

 

Moon and I installed the Pettit secondary rads,,, great improvement with such a simple install,,,
my data logs before doing a mixed amount of driving was 198-206degrees,
Today driving around highest temp was 197, with an average of 183, there is discussion in the MD thread about fabing up a Radiator mister using the mindshield washer comtrols, res, and pump, all we need is to connect longer lines and the proper nozzles, gonna use an alcky/water mix as well.,,

Looks like my trims are starting to come down too...

 

way to go! I have advocating this set up for a long time!

WELL------THE LIM CAN REMOVED WITHOUT PULLING THE ENGINE!!!!!!!!

tOOK A WHILE BUT MY IDEA WORKED--JUT REMOVE THE APV VALVES
before you try to pull the lim. then the intake comes out from up top --not the bottom.
If i had known that to start with i would not have pulled the header.

My primary ports were purty--very little carbon--im impressed.
now tomorrow put it all together again
True phenolic gasket and of coarse the intake and the boost kit tomorrow.
my injectors also looked good.
Hope the dang thing runs.
olddragger

 

Good luck Denny enjoy those extra lbs of boost...

 

One way valve was the problem!
Rote8, thanks for the suggestion. Everything seems fine, so brake booster should be ok too.
I'm only left with that hesitation problem. Hopefully it's the tune.
Now as far as the supercharger its not what I expected. I was expecting much more to be honest. Again hopefully a good tune will fix that.

 

You should hit about 300 RWHP with the stock Pettit kit and a catless midpipe.
330 to 340 RWHP with the larger pulley and a tune for bigger injectors.


I have my new belt, with belt dressing, and I am getting to 12 PSI.
Now the bad news, the 12PSI blew out an exhaust gasket.....

It is way past time to replace the Mazport midpipe with a straight pipe.

 

Are you running at proper boost levels? After my install, until the 1st inspection / run in, I was only running at about 5 psi due to new belt loosening etc.

Once tightened 7-8 psi and woooooot!!!!!!

 

All this talk of the LIM - I can't help but think of the Apollo missions...

Cheers,
Hymee.

 

dont go there mate!!
i am in the process of getting it all put together now.--lunch time.

little hints i have found so far
1--dont forget to check the rear s.c. mount--i checked the tightness and it was--shall i say loose.
putting a double nut on it now like i should have to begin with.
2- two fuel injector rubber rings(the big one) had split ---what?????--
3- great time to tidy up vacuum lines--gauges wires etc.
4- my oem check valve going to the vacuum box with all the solenoids--- was almost stopped up----huh? Yep.
replaced with better check valve.
5- those little apv bolts ? They area )(*)&&%^&%#@*_+_(()&&$&## to get back on!!!!!!.:box ing_sm
Thank God for medication and my wife.

back to work.
olddragger