Chris White

2.5, 2.6. 2.7, 2.75, 2.8, 3.0 (all 8v)
Many flavors sevred here.

evil 944t

yes, I check his old posts and he uses a TEC3R BUT, a 2.8ltr is not a 3ltr.

https://rennlist.com/forums/944-turbo-and-turbo-s-forum/205626-project-introduction-with-link-to-pics.html

gt37vgt

I think 2.5 ,2.8 or 3.0 or 3.1 3.2 is irrelevant . what is important when setting up is the way the ecu inter phases with the timing pick ups and then the ecu with the operator.

evil 944t

It is if he is looking for timing maps.

dand86951

Absolutely positively 100% correct.

Diver944

+2 on that.

My 3.2 has not yet had it's timing optimised and it's really holding me back. Mike is also having a 3.2 from the same stable and I presume he will need a good baseline for his standalone

333pg333

I think it's your panel beater who's holding you back Paul.
erk sorry, couldn't resist. Pot, kettle, black etc...

fast951

How is the timing holding you back? I was under the impression you picked up something like 60rwhp? Conditions (CR, boost, fuel octane, etc..) dictate fuel used and ignition. Your base maps must be optimized based on the parameters you have.

Diver944

Well that is the current theory I've been given. Remember my car has been in the bodyshop since my crash in June and it is still on the base ignition map. Once the repair is finished it will be straight into Indi Jons workshop to have the Wasted Spark fitted and a Vitesse piggyback that is unlocked for timing changes.

The problem we're trying to solve is that any more boost than 15psi under hard track use will bend over the electrodes on the spark plug in cyl #4

fast951

Paul, I understand. The cause of the electrode issue must be determined. As I mentioned before. 15psi is the max on pump gas! If you want to run more, a retune is needed. When you get close to it, we'll discuss in details.

A.Wayne

stick a colder plug in it for the time being , before you have to Bend over and repair no4...

dand86951

From my experience get the Piggyback with timing control as soon as you can. Fuel quality has a huge impact on how advanced the timing can be from what I have seen on my car. For my own car I know I don't have timing optimized but I can say that with the standard fuels available around here and the variability of even the premium available from station to station I had to pull timing way back in the torque curve peak area to be able to run even 13psi.

My experience has shown the long stroke and bigger bore do make the timing map very critical. John may have your chips already set for this, but if you are having problems running over 15psi and assuming you are using higher octane gas such as equivalent to the North American rating 98 octane I would be cautious from what I have seen on my car.

fast951

The maps he has are set for 15psi on pump gas. He also has a set of maps for race gas and higher boost. Running more than 15psi on pump gas on the race track is not a good idea. Yes, the timing can be pulled, and he has the PB to do it, but other issues will show. High intake temps play a big role in detonation not just timing.. Heat soak the intercooler and all sort of issues will pop. We must look at the big picture.

warpedrotor

I would try scott gomes after all Chis Whites files are based on Scotts why not go to the source

dand86951

John, I agree that octane is important and other things are also such as intake temps (Outside Air), turbo operating in low efficiency zone, heat soak from running long and hard, and pulling the timing back does negatively affect EGT. However, on my car monitoring all those other items(looking at the big picture), the biggest effect is octane rating and pulling the timing back well below 20BTDC when in the 2500rpm to 4500rpm torque peak range made for a much happier engine. EGTs on all four cylinders stay in the high 1400F to low 1500F. As I said above my bet is your chips were programmed for this and if running above 15psi especially on the track, there needs to be higher octane in the tank, then the timing can go back up and you do get a big torque and HP increase.