Thread: JWT 9.5:1 On 8.5:1 Motor Timing Question

Well he does have a JWT, so he is stuck with $100 retunes. I think I probably would just bump up the timing myself as a quick fix until I got money for a retune or a better ecu.

Now if it was the other way around (DE with DET timing), then I would definitely get the right tune

horsepower potential though the right timing map for a det has to be more potentious, right?? instead of running a de map on a det.

It really never mattered to me i usually only ran 13 deg base timing or 15 with race gas(110 octane). I usually run a 50/50 mix unless i am broke.

My current set up will be a 9.5:1 de with a 9.5:1 jwt ecu and an afc.

Can someone post pics of the det timing map and de timing map. To me the maps I have it looks like the de is more aggressive... Unless I got my maps wrong and I'm running the de map now. That might explain some things lol

normally a turbo iginiton map or fuel map is going to be a less aggressive than a NA timing and fuel map.

what things would it explain?

I found one of Calum's maps that's for DE and DET. They both have identical fuel maps.

The real difference between the two of them is, the wide open throttle side of the maps. The DET one has a lot more timing. A quick example is at 6800 rpm and 67 TP, DE is at 15* while DET is at 23*.

you would have though the de fuel map would have been more lean, i wonder if this is a example of a conservative de fuel map?

example

if the air fuel for the det is 12:1 persay

de 15* @ 12:1
det 23* @ 12:1

this would indicate that the de fuel map is either A conservative or B the iginiton map is conservative since they both share the same fuel maps, then the iginiton is what separates the 2

just woke up sorry if that isnt making sense lol

I just set my base timing low, when i was running a det ecu on a de. I think i had it set at 13 deg. so it couldnt adavnce quite as much at wot. I was always running pretty rich and always had a wideband in the car as well.

how rich were you? and I am assuming you didnt run a lot of boost either?

Like I said fuel maps were identical, same MAF and Injectors. The only other thing that looked different was the Redline, 7700 for DET and 8000 for DE.

From what I've noticed with my tunes, they are tuned to be below 12. This is fine when you have to tune for majority of people, this is why I updated mine to be 12:1. But this is off topic

I think a DE (which is probably DE+T) at 15* will accomplish the same that DET does at 23*. Since DE+T has compression on it's side thus it's already making the same amount of power that a DET does at 23*.