This is a 3 BAR base map I'm currently running. I'm only running 11.42 psi now, awaiting tuning. Any input on these timing settings (too conservative, too risky, etc.)? If so, what changes are recommended?

 

The timing looks good. I dont see any need to change it other than you can bring the split down if you want.

Jason

 

How much boost are you running and at what RPM are you hitting 15 degree advance? You can drop the timing down a few to bring the EGT's down.

Jason

 

those timing map looks familiar...

 

Will you be modifying them any or will they stay as they are when you tune my car?

 

I wouldn't change anything on the timing map.

 

"while EGTs remain in a safe zone..."

can anybody quantify this statement? <800C is good <950C is good etc...

what is the limiting factor in this temp. apex warpage? preheats next charge? unsafe rotor face temps heating oil?

if someone is having "unsafe" temps is reducing the leading advance the best thing to do. i thought that retarded timing was the cause of high EGT's due to a late combustion process?

currently i run: 13BT ported, 14deg advance, 8 deg split @15psi, 10:5-11:3 AFR's and see ~900C after a long 4-5th gear run

thanks
justin

 

Sorry, there is no such magical target number.
EVERY engine is different, so one target EGT can kill another engine even with identical mods.
This is why I said to run the car on a dyno and watch the EGT gauge.
Once the engine starts going into pre-ignition, you WILL see the power drop significantly.
Note the EGT.


EVERYTHING gets hot.
People say the oil temp gets hotter faster.


-Ted

 

Quote:
Originally Posted by Roy Johnson Jr
This is a 3 BAR base map I'm currently running. I'm only running 11.42 psi now, awaiting tuning. Any input on these timing settings (too conservative, too risky, etc.)? If so, what changes are recommended?


TurboMark7 noticed he had the exact same timing map......on a stock port.

 

I'd say alot of timing maps look familiar, wouldn't you say Steve...

 

Sure if they came from me. Since I probably tuned about 10% of the 3rd gen's out there. (about 250+ out of 3200 registered) I usually don't change the timing much and keep most of them the same for everyone unless I have the EGT gauge to verify it.

 

Steve, I am a little confused as to how a ported motor, and a stock port motor would use the same timing, and be optimally tuned? I realise it's not your job to teach me all you know, just curious. If you have a moment, maybe you could post your thoughts in brief. Thanks, nice talking to you again, Carl

 

Carl,
Most of the cars I tuned are conservative for reliablilty. The cars are optimally tuned for driveability and WOT a/f ratio in most cases. Even a/f ratio vary slightly from car to car, some likes a little leaner (depending on the ignition setup) while others like richer. There maybe 10 people out of all the cars I tuned that wanted aggressive tuning. (which is why I tuned them a little towards the rich side for most cars and conservative timing). The ignition map that I use for most of the cars came from a ported motor (aggressive SP) that I tuned and reliable for a few years from testing on one of the shop car. Believe it or not, we have accidently ran as much as 40degrees in advance timing and the motor still holds doing tuning. The only thing I changed was the split timing to lower the knock #. You have to remember that 90% of detonation comes from the trailing spark. The most split you have, the safer the engine from detonation. Based on my experience, I used the same ignition map I place on most of the cars unless I have an EGT to monitor for temperature change. Every so often, I would mess with the split timing depending on how the car sounds on the dyno. Some cars require more while others require less. I have to listen to them in order to be able to tell what fits best for a particular car. In most cases, 14 degrees split is a good starting point.

 

Hi gurus...very intersting thread....no need to say.
I posted my Trailing Split Map....Open in in XL....what do you think? I am running a non sequencial with extended street port FD....

it seems to work for me...oh yes and about 16psi boost...

 

Damn I started this thread like 2.5 years ago! This isn't really the same, but I can run 26 degrees advance at 16 psi in my cobra with no knock.

 

hey you folks....

anyfeedback on the trail split map???

 

I can't open the file.

 

use open with XL... or else load itg onto the wolf software....

 

Great info, im going to be tuning with an AEM really shortly, this will help.

Thanks

 

My goddam head hurts after reading all this........ I'm just gonna dump my car off to Dr Dave at KDR and let him **** with the timing.......

 

I run 50 degrees advance in my 12 cyl. JAGUAR N.A. been that way for 2 yrs.

 

So people aren't very confident with Dave's tuning abilities.

 

BEST THREAD EVER.
Well, close.

 

Posting some more maps would be good......

Let me see if I got this right after reading all these posts.

The split won't help power too much but, will lower egt's and u want the split to about 12 as the rpms and boost go up?

Leading should dip as boost and rpm go up to max torque- then slightly go up to maybe no more than 20 stock port, 17 street port?


I try to scan my maps for u.

 

^^^