- Thread starter
- #151
soldave
15+ Year Contributor
- 737
- 1
- Feb 17, 2008
-
Okinawa, Japan,
Asia
Well you never know... one of these days I might get back into what I like doing most with cars: playing with ECMLink and tuning them.
And I've just been reading the data from a guy in the States who's got a fairly similar setup as me, and having good success. He's running a HX-40 Pro on a built engine with the usual nice trimmings but stock intake manifold, but is only using 91 octane petrol. And he's doing a knock-free run at 30psi and making close to 600bhp according to his ECMLink figures (not good for a comparison I know, but still showing good power). Another good figure would be saying his 70-90mph times are about 1.15s and the turbo peaking at 65lbs/min of airflow.
What is interesting for me is looking at his timing maps, and seeing how much timing he's dropped compared to my map currently.
His timing map:
My timing map:
Now I know there are lots of factors involved, but it does look like I could still drop timing by a degree or 2 at the higher end of the rpm scale and pick up some more boost (running around 1.6-1.65 bar at the moment, or was the last time the car was fit for a 1/4 mile run). And knowing that the turbo is only starting to come alive, I'm wondering if sacrificing timing in favour of boost might net me some big gains in power.
I'll inevitably have another problem tomorrow with the car, putting tuning even further away, but it gives me something to think about.
And I've just been reading the data from a guy in the States who's got a fairly similar setup as me, and having good success. He's running a HX-40 Pro on a built engine with the usual nice trimmings but stock intake manifold, but is only using 91 octane petrol. And he's doing a knock-free run at 30psi and making close to 600bhp according to his ECMLink figures (not good for a comparison I know, but still showing good power). Another good figure would be saying his 70-90mph times are about 1.15s and the turbo peaking at 65lbs/min of airflow.
What is interesting for me is looking at his timing maps, and seeing how much timing he's dropped compared to my map currently.
His timing map:
My timing map:
Now I know there are lots of factors involved, but it does look like I could still drop timing by a degree or 2 at the higher end of the rpm scale and pick up some more boost (running around 1.6-1.65 bar at the moment, or was the last time the car was fit for a 1/4 mile run). And knowing that the turbo is only starting to come alive, I'm wondering if sacrificing timing in favour of boost might net me some big gains in power.
I'll inevitably have another problem tomorrow with the car, putting tuning even further away, but it gives me something to think about.