You might cause the first mass 'jizz in our pants' for the rx8club !!!!

 

heres mine, greddy kit cobb ap, rx7 store midpipe with cat, greddy se catback

 

You need to turn up that boost a little bit. 4 PSI?

 

haha mine does nearly the same thing... EBC is sitting in my garage though

 

it tapers off to 4 psi, i tried turning it up but for some reason it would max the injectors and bog.

 

Tuning perhaps ?

 

maxing the injector would be expressed in a lean condition.

a lean condition with bogging would mean a very lean condition.

a very lean condition with a turbo would equal BOOM.

like Brettus said, it's probably in the tuning, I would say you are either running too rich or you have some ignition problems. or possibly mechanical problems with the wastegate or a gigantic boost leak.

 

I vote Ignition problem... I know you said you jsut had your ignition replaced but your dyno also seemed low..... If only my dead alternator didn't run me somewhere near $800 bucks, including battery replacement and towing (yeah I had a P2503/2502, shitty day that was!!) I would get mine on a dyno... My boost profile looks very similiar to yours... tapers down to 4 psi around 7500rpm depending on what gear... (stock greddy wastegate, no boost control or arm mod).

 

He doesn't mean that it maxed-out the injectors like he ran out of injector.
He means that the injectors went to maximum output and created an over-rich situation.
That is what a "bog" is - too rich.

 

yes thank you MM, since the dyno i havent tried to mess with the wastegate any, im tempted but i rather not break apex seals on something as trivial as this.

 

Added Mazdatrix dyno from this thread ...........https://www.rx8club.com/series-i-major-horsepower-upgrades-93/mazdatrix-turbo-renesis-205790/

 

Would might have been nice to have Turblown kit with APV closed as well, in the first chart, just for comparison to MM greddy upgrade.

 

guess i should add my dyno here? 1st one i have ever did after the kit installed
redline is the dyno on 7-8psi boost
blue line is when we turned on the water meth system running one 175cc nozzle post blower
the low line is way back in 2006 on a NA motor with bad coils/ plugs and maf!

engine mods--pettit sc kit with low boost pulley 7-8lbs
SI oem injectors except for 2 uncapped yellows tested at 550 ccs
I did some LIM work
Pettit built engine with 3nd gen apex seals, ports are stock just cleaned up a little
ignition coils are the msd 8247's on stock dwell table--msd has revised these coils to operate on 3ms
denso one step colder sparkplugs
IAT was 18C on 65F day with fan in front of car--my little front support beam/grill work---worked! My air filter is inside the engine bay.
I left approx 10hp on the table per tuner Steve Kan.


https://www.rx8club.com/attachment.p...1&d=1322317101

 

Nice numbers OD . That power increase as the aux. ports come on is much more prevalent than the other Pettit SCs .

 

we were surprised. it is like a v tech--you can actually feel it fairly strongly. Guess my intake work must have helped a little?
I wasnt expecting this much at this boost level. very pleased, my engine must be breathing ok

 

beg to differ. I am opening the apv in the oem config--like many others and I have never seen a spike like that. Maybe there is one--but i havent seen it?
I have a low boost set up compared to most others. I would think that the engine is breathing pretty good?
my boost did not change during the transition.
wish i had the maf numbers during that dyno. Steve mentioned 385g/sec plus?? I dont know if he had to scale--but at that number he probably did?
Are you saying that if the apv was opened earlier that the output spike would not be there? I will admit i dont know a lot about tuning this engine but I am open for educated opinions.
I do like also how the power did not drop off --even at 9K. I guess the blower has enough "oomph" for the engine?
Like i said--i left more power on the table....just trying to stay conservative--if that is a word that matters in the FI rotary world--lol

 

Since OD did I will to, even tho its a po stepchild auto with a mild tune, I kinda like the apex seals where they are.

 

Nice result for an auto . Although it doesn't meet the criteria for inclusion on the first page .

Posting in the Petit forum would be more appropriate.

 

What is going on there; is that a boost dpike or ....???

OD, you are like a duck stuck in deep the Sahara desert.

 

I'm so ashamed, I haven't blown the apex seals out the exhaust.

Merry Xmas and Happy New Year

 

Duck in a desert? Lol--that may be my new avatar.
Team--I know I dont know much, but I am listening. If anyone has anything to offer I am right here.

Hey Travis--still tracking that thing?

 

The slo mobile is in the garage for the winter, someone from nasa central saw barbara driving and asked her to join up and enter her in the top 2 classes of her choice.
Sounds like fun to hit new tracks and for her to be accepted right in to the top tiers.
So typical, years ago we could go into any club, they would kill me and toss the body out the door and party all night with her. hehe Wimmen, there used to be laws.

 

WELL--UPDATE>
THE DYNO I POSTED WAS ONLY ON 4 PORTS OF THE INTAKE. MY SSV WAS NOT WORKING!
I guess that apv opening jump will no longer be as apparent.
My car never threw an ssv ptc --never.
Brettus suspected that it may be not working after looking and thinking about my dyno sheet. So he mentioned that to me. I checked it out and the vacuum cannister solenoid was not working.
DAMN!

 

Asking tuner ( Steve Kan) if I need a retune. a/f's seem fine but stft's can be as high as +20,
ltft are -2.5.
I may be back on the dyno and this time all intake valves will be working.
I never suspected that before the tune as I was driving very easy and hardly ever going into any kind of boost. It has never happened before. It didnt throw any SSV codes ( there arent many)
Better safe than sorry. driving easy again.

 

how do you know it was not working at that time and then failed later?