10% faster ?

[totta Crolla]

"wire up a small amp and some speakers to the knock sensor"
Tip of the month
I never even considered that !
Just got to modify the water lines to fit the knock sensor back on.

[allencr]

totta Crolla Wrote:If I can make my '86 10% faster I reckon I can have a good competitive car in my class.

Some have found that Driving School did more good then HP & weight reduction.

[oldeskewltoy]

part of the reason I recommend selling all the old stuff is to get rid of 25 year old wiring @ the same time...

a BIG part of it is the newer stuff is so much more user friendly, the Freedom is legendary, but it seems to require a tuner from Japan


Another place to get premium return on your old ECUs would be Yahoo Japan.

Concerning ignition maps... I've got one that runs VERY well with 10.75 to 1 CR and 264 type cams....

[isac]

My 4age it's running with Megasquirt and alpha-n mode.

@ oldeskewltoy

What's your map % at idle, low acceleration, cruising and WOT? From your table I see very high advance happen to soon, but I'm above 11.3 to 1 CR with 288in/272ex/9mm and never tried to "map" the Megasquirt in MAP mode... (no enough map resolution with AE101 throttle bodies).

[Sam-Q]

likely to be hard to get but there is a lot of weight in the doors. Some fiberglass ones would help a lot

[oldeskewltoy]

isac Wrote:@ oldeskewltoy

What's your map % at idle, low acceleration, cruising and WOT? From your table I see very high advance happen to soon, .

to directly answer your questions:
MAP @ idle 55-65 depending on load,
MAP low throttle, 30-40, depending on load
MAP @ WOT 90 to 100, depending on load
MAP @ cruising 45-60, depending on load

the ignition map was a collaborative affair - 3 tuners and I had a hand in its construction. The early timing advance was based on a map from a VERY reputable 4AGE experienced race shop....



A bit simple, but the timing is VERY aggressive



My current fuel map is based on the following info....



the above info builds a base map for the system - based on 320CC low ohm injectors, and AFR targets(below)...



here is the actual map.... % are based on the above 3 variables (injector specifics, injector volume, and AFR targets)





The system is still "learning"... and I've had to fiddle with high rpm high vacuum situations, because I have the system NOT fueling when there is no TP angle present... this has caused some stumbling @ high rpm high vacuum (bottom right of fuel map)

[isac]

"start" values from fuel map look very lean but not critical.
I prefer to start tuning from rich side.

Quote:because I have the system NOT fueling when there is no TP angle present... this has caused some stumbling @ high rpm high vacuum (bottom right of fuel map)

Just a thought, maybe you could remove some advance and increase fuel (richening AFR) in this area to keep walls wet during decelerating and prevent stumbling.

[totta Crolla]

all sorts of useful info here.
I may have found 1% already, whilst the car handled nicely I have since discovered the caster angles were wildly different each side. 3.2 degrees driver side and over 6 degrees passenger side. It seems the toe angles were adjusted to compensate.
Needless to say it drives even better now