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I have a 3.0L 968 turbo engine.
I am looking for some timing curves. Not so much start up, but timing at different RPM's and boost levels. With a timing map to start, I can adjust fuel to get good correct O2 readings.
If someone has one it would be very helpful.
Thanks
You definitely wouldn't transfer someone else's timing into your motor. You need to get it tuned properly. What sort of ECU does this have? What turbo? What history? Where did the last owner tune it...etc...???
I think that engine comes from renowned 951 builder and tuner Bob Boyer.
Did you get this engine without the ECU it was originally tuned & running with?
If you know the exact CR, turbo, exhaust, fuel that is used, boost level, then you can make ignition table pretty well provided that you have tuned these engines before. But as always with boosted cars, you never know the real knock resistance of the fuel unless you tune it in real life.
But to have the car running well (not 100% perfect regarding power) there are many other factors involved not just maximum power. I always tune the cars driveability on the street and track, meaning real life and I never have issues with car not running right few days later for example.
I have mentioned this many times, dyno is good thing but cannot replace real life tuning And with pump gas you are always knock limited, not MBT limited meaning when you start registering knock then you need to back off timing a bit and there's your max power for that engine/boost/fuel combo.
With E85, racing fuels etc the story is different, you will be past MBT often before knock occurs, same goes to normally aspirated cars. Have seen many-many cars with way too advanced tables so that engine actually lost power quite a bit.
P.S. I have made 944 S timing map from scratch and later verified it on the dyno, I gained 2 hp
I am new to Rennlist so sorry for all the dumb questions and bad postings.
The car: I built the car and engine in 2006-8 and raced it a few times. It has been setting in my garage scene 2012 as I lost the fire to race. I have a 87 951 that I have raced for years ( started road racing in 1998, started in the racing game in about 1970, Yes I am a old guy ). The 951 is Also resting, But runs great.
Bob Boyer helped tune along with a few others. It has a Wolf V500. I did very little of the engine tuning myself. (I like to drive.) It has been on both engine and wheel dyno over time. It really has never worked as it should or at least as I want it to.
I am now planning on putting it back on the track this summer. I think the timing is one of my tuning issues. It works fine on the dyno, but out on the track it has head gasket leakage. ( bad knock??)
I would guess that in the past 5-10 years of tuning, some things have been learned.
I have attached my current timing map. I am not looking for a exact complete tuning map, just some timing curves ideas. I will then take it to a wheel dyno, then to test and tune track days to dial it in. Then go like Hell, on race day>>HAHA
Maybe I should run E85, But it not easy to get in the Seattle area.
Thanks Guys
Craig
can you add a boost-reference (manifold pressure) to the ignition table?
"Load" is a tricky thing to tune based off of unless you know the Load equation in the ECU.
Also, that is a HUGE drop off in timing from 36% to 43% "load".
Or should say...you are running way too much timing in those low cells, that is more than my 8-valve NA runs at part throttle.
01-02-2017, 10:32 PM
3L 16V turbo timing question
And with pump gas you are always knock limited, not MBT limited meaning when you start registering knock then you need to back off timing a bit and there's your max power for that engine/boost/fuel combo.
