my rx8 is running lean i think please help
 

howdy just went to the dyno today and it sucked i have a turboxs exhaust bb cat pipe and hks intake and only ran 177.3 hp and 120.0 tq on a 6 speed with 7500 miles on it but the thing i think is the problem is from 2 to 6 k my a/f raito is 14 .5 to 13.5 but at 7000k it drops to 11.5 the guy at the dyno said thats the reason for the low numbers any ideas what problems this can be he blives it my hks intake is not providing anough air presure to the air mass cencer he said its getting the valume of air maybe just no the pressure, any one have this problem or know what could be causing it like mass flow sencer, 02 cencer, spark plugs, etc please help

i just did a full kam nvam pcm ecu rest car is running a lot better now can feel a big tq dif so ill be heading back to the dyno next week

I'm afraid that that is relatively normal results depending on conditions.

The 11.5 AFR in open loop at WOT is normal...so is the 13.5-14.5 closed loop before 5.5Krpm.

You should dyno a bit higher after it has run in a bit more...but depending on the dyno that isn't that bad :(

Yep. Totally normal AFR. And, btw, the condition you are alarmed about is 'rich' not lean.

We could use some lean'age. We run pig rich mostly.

11.5 is rich ? im new to fuel raito so 11.5 is richer then 14.5 ?

Yes, it's much more rich than 14.5

ok

The Inteceptor-X ECU will allow you to tune the AFR's and adjust the timing to maximize your components and increase power!

so then do u guys think im running to rich

i do plan on buying 1 but i want to do a few more things first and about the the ecu of your what kind of power will i see na im trying to get the most i can from na

The higher the AFR figure, the leaner you go.

Other than tuning the AFR. Will the Interceptor-X fix my problem of "system lean"?? :scratchhe https://www.rx8club.com/series-i-tech-garage-22/p0171-system-too-lean-78270/

hey scott just wondering if you have to disconnect the two speed sensorsto the rear wheel prior to dynoing car?

ok what this 2 wheel thing i heard it lowers the dyno numbers but my car doesnt have traction control is there somthing i need to disconect to get my real power gains

yes.....the exhaust manifold so you can install A TURBO.

Your power numbers are correct. They are totally in-line for this car. There is nothing wrong with your car or the dyno - only your expectations.

No you do not.

You should be able to tune the lean problems out of you setup with the Interceptor.

i still think these numbers r quite low for my car with no cat a exhaust and intake is the cel from my cat pipe hurting my performance oh this numbers where on a dyno jet and i read that stock ones put from 180 to 185hp and 130 to 140 tq on these i post my dyno street so u guys can see the fuel curve

well i cant get the pic file s,all anough i take th epic with the other camra later u think after 7500 mile my plugs r bad or fuel filter is bad or just the cel light from my cat pipe is telling the motor to run at lower out put

toca, I think the best way to interpret a dyno in your situation would be to do a before and after. Not every car is going to be the same. Some completely stock cars dyno at over 200whp, and some at 170whp. If you want to see how much you have gained on all your mods, do a dyno with it back at stock, and then with your current mods. Try not to look at the final number, but the difference it gets you. But also, unless you tune you ecu for your mods, you more than likely won't see a huge difference anyway. Sorry to burst your bubble.

Good. Then i'm going for it if my problem unsolved. But have to save some cash for a while.

Also keep in mind not all Dynos are the same, or the guy operating it. With that in mind, use the same one for all your tests.

The cat or lack thereof would actually lean out fuel curve a little bit so it would actually help.

But don't be surprised man :spank:. I wasn't at all when you told me those numbers. An exhaust is not going to make you run 200 whp for one hope you weren't dreaming about that if you were I can see your frustration. I think the rx8 in california are on a different flash that probably provide less power due to emission requirements. That could be complete bullshit though but hey it's an excuse.

That header you're planning on getting isn't going to change much either, you need proper tuning, tune the afr's as you please the leaner you go the more hp you would get. Nothing is wrong with your car just accept it.

OR just do what the above poster say and get a turbo in there, only way for now.

only thing that makes me feel there is something wrongs is that i seen a dyno of someones turbo rx8 on here at 8 to 10 psi running 11.5 just funny how my stock car does 11.5 at 7k plus