MazsportScott

I said reliable power at 12.8-13.0 to 1. If a winning road race motor last's 5,000 miles you are doing very,very well. Running on the edge may attain an extra 10rwhp and could be a fender length on the opponent by the end of the straight away. It is a balance, engine life V.S. power. I am always a little consevative with customers cars (unless they are standing next to me saying More,More) so 12.8-13.0 to 1 has tradionally worked quite well. Scott

MazsportScott

Scott, will I be able to chase a certain AFR if I have a separate wideband O2 sensor in place?

Yes you will. And the really nice part is, with the Interceptor once you have dialed it in IT STAYS THAT WAY!

Nemesis8

iTrader: (3)

Thanks, and 12.8 to 13.0 is perfect. How about timing, should we be about 26 or 30 at WOT?

MazsportScott

Personally I'd rather see full advance at full throttle somewhere around 25-26 degrees.

RG, Set the leading advance to the specific RPM/Load value you choose, then adjust the split based on RPM. I have always found 24-26 good on 13b N/A motors, bridgeports and PP's are a little different.

MazsportScott

Alright I cannot keep quite about this, Skud Runner has allowed me to use his Rx-8 for the N/A testing. I plugged a unit in and fired it up last night! If everything goes well we will be on the Dyno saturday. Thought you would like to know,Scott

MazsportScott

Thanks, and 12.8 to 13.0 is perfect. How about timing, should we be about 26 or 30 at WOT?

Frankly, not really sure yet. But we will know real soon.

Nemesis8

iTrader: (3)

Good Luck Scott - now get'r done

brillo

awesome.

Scott, did you get the cruise control working yet with the unit?

PUR NRG

Hey Scott, take care of your existing customers and get those boosted units out the door now instead of end of the month.
________
FIX PS3

Razz1

Ithought you couldn't adjust the timing with Mazsport ECU.

MazsportScott

I am burning the wick not just on both ends, but have removed the wax at the middle and it's burning as well!
I appreciate your patience, rest assured I have not lost track of those who have priority. The units will be delivered A.S.A.P. Scott

rotarygod

You've got that a little confused. At this time you can't adjust timing with the Megasquirt ecu. That is being worked on right now though.

Scott, I like about 25-26 degrees total advance on a stock or streetport 13B. Split I start at a fixed 10 degrees across the board and then adjust from there. Generally I initially shoot for between 12.6-13.0:1 afr's so it appears that our techniques are very similar. Since I haven't tuned a Renesis yet I'd just start with what I know and go from there.

MazsportScott

Razz,
You have control over, well, everything required to increase the performance of your engine. Ignition timing values may be adjusted at RPM,Boost/manifold values,air temp,water temp and split. The Interceptor system is giving the user more control over more components than anything available.

swoope

iTrader: (5)

scott,
if you need another na car to mess with i am in davenport. about 45 min away. and i only work fri sat and sun.

have an a&p.

only mods are revi and duct.

i have one of the good cars. rarely under 21 mpg.

beers

r0tor

iTrader: (1)

I tried that and the car felt like a dog. 30-35 degrees works much better.

r0tor

iTrader: (1)

No I don't - even with my car running ~13.5 afr (on my cz canscan at least) I can still even add timing on top of the factory 30 without it doing anything funky.

If your hitting the knock sensor you won't hear it knock, timing would be be pulled immdeiately to prevent it.

rotary crazy

I cant wait to see the results, good luck scott.

I was not going to buy and rx-8 but if you can get 230 rwhp na and stay streetabel I will buy one, thats +/-270 fwhp on a 2950 pound car, hello hig 13's and in a road track hello evo territory.

rotarygod

That's why I said start with what I know from the 13B's and then tune from there. It's very possible the Renesis wants more timing. It seems like the more extreme the porting such as bridgeporting/peripheral porting, etc., the less the total advance. It could very well be true that due to the lack of port overlap that it does want more timing advance. Hopefully I'll find out firsthand in the near future.

Xyntax

I know you can add. You know how the stock setting gives 30 degrees of advance all the way in the open loop area? As soon as you lean the mixture a bit with CZ, canscan would show that advance goes from 26 - 30 in some ranges. What I was trying to say was, have an ECU controller that keeps it straight in the 30's, so we dont have to add advances when we get the AFR curves stable.

r0tor

iTrader: (1)

That doesn't happen on my car as seen here in an attachment from a previous thread when this sort of thing came up

https://www.rx8club.com/attachment.p...chmentid=50515

I'd investigate the knock sensor aspect of things
here was the thread



... i should also add I usually don't have my afr's that high for daily driving, actually closer to 13.0 which seems to work fine with 89 octane

Xyntax

^ This is what I meant:

Stock data


Tuned (CZ) map


...even the slightest change I put in the airflow adjustment map, ignition timing goes below 30. I know that ignition changes I made in CZ will not reflect on canscan.

Sorry we got this thread off-topic. Back on topic now :D

army_rx8

since i'm new to all this (tuning)..how did your car run with your afr runnign up and down like that? i woudl think that wouldn't make teh engine too happy..but i'm new as i said? just trying to learn

oh hehe sorry we are supposed to be geting back on track :p

Razz1

Scott, Can we return the ECU for upgrade once you get the cruise control to work?

Sure is nice on the way to Vegas or Laguna Seca/Willow Springs.

MazsportScott

Yes, no problem.

Xyntax

Check out the threads at the e-manage section of this site. I'm using a canzoomer unit to do this. The X-Interceptor would be able to do this with so much better control. A piggyback, such as e-manage, is just taking the true values from the sensors and adjusting them before sending it back to the ECU. Our ECU isn't too friendly that it counteracts the effects after some time. With the stand-alone X-Interceptor, you could bypass the insanity the ECU does and tune your AFR mixtures much better.