slash128's Top Mount Build
10-09-2013, 08:04 AM
#176
n3rd
Thread Starter
Interesting. So it must have just linearly trended out based on the last values in the table? Put this altogether and I think the Cobb has had room to grow all along!
10-09-2013, 08:05 AM
#177
n3rd
Thread Starter
Yomom ya I feel like I am playing with fire. I am not prepared to run full WOT logs at this point. But I couldn't resist not testing. It's been keeping me up at night.
10-09-2013, 03:00 PM
#179
n3rd
Thread Starter
Ok, I could not resist. 2'dn gear WOT log attached. I did see 15psi on the boost gauge and 227.36 peak load. The tune needs some work, went scary lean up top. There was some timing pulled in a couple spots lower down. I lost traction to the rear wheels just before 7K RPM, which caused the apparent huge HP jump on the VD graph. At least you can see the direction it was head 
I was scared. Didn't attempt 3'rd gear. I think I am not going to tempt fate anymore. At least not for today... 
Also, nice to see I didn't quite hit 5V on the MAF, but it was close!
I was scared. Didn't attempt 3'rd gear. I think I am not going to tempt fate anymore. At least not for today... Also, nice to see I didn't quite hit 5V on the MAF, but it was close!
Last edited by slash128; 10-09-2013 at 03:05 PM.
10-09-2013, 03:09 PM
#181
n3rd
Thread Starter
Yeah, Fazda was baffled by the coils as well. He said they must be magical. I have a BHR set, but I can't tune out the misfiring I was getting. So I have been running these OEM coils and they seem to be doing the job just fine and they are over a year old at this point.
As for injectors, I am running stock reds for the P1's and uncapped yellows for Sec and P2's.
As for injectors, I am running stock reds for the P1's and uncapped yellows for Sec and P2's.
10-09-2013, 03:13 PM
#182
Yeah, Fazda was baffled by the coils as well. He said they must be magical. I have a BHR set, but I can't tune out the misfiring I was getting. So I have been running these OEM coils and they seem to be doing the job just fine and they are over a year old at this point.
As for injectors, I am running stock reds for the P1's and uncapped yellows for Sec and P2's.
As for injectors, I am running stock reds for the P1's and uncapped yellows for Sec and P2's.
I would swap the P1s to capped yellows and tie open the SSV . This is what I have done and it has sorted out those spikes altogether and made the transition smooth as silk.
Also - your loads are dropping away significantly at higher rpm which is probably lucky for you given your lack of injector capacity.
With the oem coils - I actually got mine to work at similar loads up top as well - by increasing dwell by about 5% .
Last edited by Brettus; 10-09-2013 at 03:15 PM.
10-09-2013, 03:27 PM
#184
n3rd
Thread Starter
Thanks for suggestions! 
Yeah when it went lean I had not time to react. It happened so very fast. You can even see where vehicle speed actually dropped between line 100 to line 101 from losing traction. I believe that is why the load dropped, no traction!
Definitely got some work to do, and added to my winter list. But it will make for a fun 2014
Yeah when it went lean I had not time to react. It happened so very fast. You can even see where vehicle speed actually dropped between line 100 to line 101 from losing traction. I believe that is why the load dropped, no traction!
Definitely got some work to do, and added to my winter list. But it will make for a fun 2014
10-09-2013, 04:14 PM
#186
n3rd
Thread Starter
That spike at 4400 rpm is worrying as well .
I would swap the P1s to capped yellows and tie open the SSV . This is what I have done and it has sorted out those spikes altogether and made the transition smooth as silk.
Also - your loads are dropping away significantly at higher rpm which is probably lucky for you given your lack of injector capacity.
With the oem coils - I actually got mine to work at similar loads up top as well - by increasing dwell by about 5% .
I would swap the P1s to capped yellows and tie open the SSV . This is what I have done and it has sorted out those spikes altogether and made the transition smooth as silk.
Also - your loads are dropping away significantly at higher rpm which is probably lucky for you given your lack of injector capacity.
With the oem coils - I actually got mine to work at similar loads up top as well - by increasing dwell by about 5% .
If I go back to stock yellows in the P1's what are your thoughts on P2 replacements, if I am currently running out of injector capacity?
10-09-2013, 04:25 PM
#187
Two choices :
*Tie back the valve physically so it can't close.
*Put the VDI elect. plug into the SSV solenoid (delete the CEL)and set the VDI opening rpm to say.....750 (this is what I have done)
I will make your idle a bit lumpy but otherwise you will not notice any difference.
So ....... yellow/UC yellow/UC yellow
If that is not enough - you might be able to play around with injector latency on the UC yellows to get more out of them. What are they currently scaled at ?
Last edited by Brettus; 10-09-2013 at 04:27 PM.
10-09-2013, 04:31 PM
#188
n3rd
Thread Starter
Got it on the SSV and injectors. I believe I have a brand new set of 4 yellows laying around somewhere in the garage...
Another issue at the top end could be my MAF scale. The MAF is stock out to 4.69V, but since that is as far as the stock MAF table goes I trended out the last 3 cells to get up to 5V based on the previous cells. But the curve drops off substantially. Looking at it in ATR it is not so but looking at it in Excel it is very apparent.
Another issue at the top end could be my MAF scale. The MAF is stock out to 4.69V, but since that is as far as the stock MAF table goes I trended out the last 3 cells to get up to 5V based on the previous cells. But the curve drops off substantially. Looking at it in ATR it is not so but looking at it in Excel it is very apparent.
10-09-2013, 04:39 PM
#189
Got it on the SSV and injectors. I believe I have a brand new set of 4 yellows laying around somewhere in the garage...
Another issue at the top end could be my MAF scale. The MAF is stock out to 4.69V, but since that is as far as the stock MAF table goes I trended out the last 3 cells to get up to 5V based on the previous cells. But the curve drops off substantially. Looking at it in ATR it is not so but looking at it in Excel it is very apparent.
Another issue at the top end could be my MAF scale. The MAF is stock out to 4.69V, but since that is as far as the stock MAF table goes I trended out the last 3 cells to get up to 5V based on the previous cells. But the curve drops off substantially. Looking at it in ATR it is not so but looking at it in Excel it is very apparent.
10-09-2013, 04:45 PM
#190
n3rd
Thread Starter
This is how the top end of my MAF table is currently sitting. I didn't get specific with calculating the curve, just eyeballed it by looking at a graph. There was really no way for me to tell if it goes linear or continues a weaker curve.
4.3 4.41 4.49 4.57 4.61 4.65 4.69 4.77 4.89 5
278.12 302.48 319.54 337.28 346.41 355.72 365.21 380 400 425
4.3 4.41 4.49 4.57 4.61 4.65 4.69 4.77 4.89 5
278.12 302.48 319.54 337.28 346.41 355.72 365.21 380 400 425
10-09-2013, 05:08 PM
#196
this has become my go-to thread. I can't wait to go FI. after you address the fueling problem I'm going to start a chant: "3rd gear pulls, 3rd gear pulls"
great progress slash and thanks for the info on the baro sensor Brett.
Posted From RX8Club.com Android App
great progress slash and thanks for the info on the baro sensor Brett.
Posted From RX8Club.com Android App
10-09-2013, 05:17 PM
#197
n3rd
Thread Starter
Yomom, thanks. I am eager for 3'rd gear as well
but I need new tires as well as fuel... That's def not happening this year, unfortunately...