Ignition timing for turbo or supercharged renesis - post your maps
07-20-2012, 03:47 PM
#202
Firstly I did search and I know there was another comprehensive thread around here on this subject that seems to have disappeared . If someone can find it i'll delete this thread .
The purpose of this thread is to discuss what is working for people and at what boost / whp .
Latest map used for us tunes on 91 octane :as of 22/06/2012
The purpose of this thread is to discuss what is working for people and at what boost / whp .
Latest map used for us tunes on 91 octane :as of 22/06/2012
Add 6 degrees at least.
And what about the trailing ... you running negative split?
15 degrees split is for tossers and puffs
09-01-2012, 02:27 AM
#205
Registered
Never tried 15, I thought the stock split was 11....
Should I try a 15 degree split?
I am currently getting some spark blow out past 180-190% load, maybe opening up the timing split would help?
(I blamed plug gap)
I should try it with more split.
Should I try a 15 degree split?
I am currently getting some spark blow out past 180-190% load, maybe opening up the timing split would help?
(I blamed plug gap)
I should try it with more split.
Last edited by Rote8; 09-01-2012 at 02:37 AM.
09-02-2012, 11:32 AM
#207
Registered
My spark plug gap is currently .035, but I am thinking of dropping it to .028 -.030.
I am using the MSD 8247 coils with the BHR published dwell specs.
What rpm do you hit 185% load at?
Update: front rotor's spark plug was gapped at 040, rear at 035; both are now at .030.
Off to go logging, wish me luck.
I am using the MSD 8247 coils with the BHR published dwell specs.
What rpm do you hit 185% load at?
Update: front rotor's spark plug was gapped at 040, rear at 035; both are now at .030.
Off to go logging, wish me luck.
Last edited by Rote8; 09-02-2012 at 02:13 PM.
09-02-2012, 07:46 PM
#209
roger that! watch the timing closely.
BHR dwell specs for the truck coil( i am assuming around 5 ms of dwell?) is too much for the msd 8247's. The recommended dwell for 8247's coils is 3.3 ms.
You may have burnt them?
My 185 load is high in the rpm band
With my ignition set up I am running 36 of gap--i do run the denso plugs. i have no problems.
It may run better with the ssv tied open..... mine does.
What octane are you running?
AT 16 psi your static compression is still up there.
maybe i will start a discussion by saying that there is value in indexing our sparkplugs--expecially the leadings.
BHR dwell specs for the truck coil( i am assuming around 5 ms of dwell?) is too much for the msd 8247's. The recommended dwell for 8247's coils is 3.3 ms.
You may have burnt them?
My 185 load is high in the rpm band
With my ignition set up I am running 36 of gap--i do run the denso plugs. i have no problems.
It may run better with the ssv tied open..... mine does.
What octane are you running?
AT 16 psi your static compression is still up there.
maybe i will start a discussion by saying that there is value in indexing our sparkplugs--expecially the leadings.
09-08-2012, 11:56 AM
#212
Sorry for the late response.
I'm trying to remember where I saw the 15 degrees of separation ... I know Jeff talked about it and I think I have a book that discusses it ... and a thread over at RX7club.com
I'll try and find the source material for you.
In the meantime ... here's a table of the Stock Style Separation vs. WCS Boosted Style Separation (which isn't really mine but MM's)
STOCK STYLE Ignition Separation:
WCS TC Ignition Separation
Notice how much 15 degree's of separation are used on both tables.
--
Could you describe to me what you are experiencing and associating it to spark blow out, please?
How can one tell this is occurring, I maybe have experienced the same thing and not known it.
edit ---
Oh and yes I'm using some negative split separation ... again Jeff's mapping
Last edited by wcs; 09-08-2012 at 12:01 PM.
11-24-2012, 10:25 PM
#222
SARX Legend
iTrader: (46)
Zero compression on front rotor, it only idled for a minute or so. There was some metal shavings in the pan, and a sand like substance (hopefully not from NRS seals) in the oil in the exhaust manifold. We have it broken down to a keg and will pull it apart in front of the builder next weekend. We shall see...........
04-04-2013, 05:14 PM
#223
So I have been playing with powerFC its a tuning gizmo for FD's fortunitly I was able to find varies maps, however there not situated correctly, so I did just that, I converted the files to match our x-axis and our y-axis. additionaly the FD uses a MAP based system, that can be converted to boost, then I took into account the effective compression ratio's of both the rx8 and rx7 engine and came up with a chart, green shows roughly our 100% load, and yellow is our roughly 200% load. its interesting to see how close the two match except for split, much different.... discuss and enjoy!
12-24-2014, 11:03 PM
#225
Driving my unreliable rx8
I've been working on timing quite a bit since I'm getting into boost. So I've referenced all of the maps I can find on 8 club. Now I'm pulling in data from 7's also. To start I collected all that I could find and have made a corss reference chart. That calculates absolute cylinder pressure per compression ratio. Then converts it back to the equivalent boost pressure for an rx8. finally converted the equivalent pressure to load.
This should make referencing rx7 maps to compare timing pretty easy.
Hopefully in a few days to a week. I'll have a compilation of the maps. With one showing the lowest timing I've found and one running the highest. My target is to use the lowest as a base timing then work timing up.
This should make referencing rx7 maps to compare timing pretty easy.
Hopefully in a few days to a week. I'll have a compilation of the maps. With one showing the lowest timing I've found and one running the highest. My target is to use the lowest as a base timing then work timing up.