Ignition timing curve for a 4agte.

[terrytuffguy]

What is a good timing curve for a turboed 4agze setup? I know there are alot of variables with setting your timming. But I need a basic curve so I can have something to work with......cheers

[suberimakuri]

20 degrees under boost.
you can start with 20degs static timing....and go up to 35 under low load, and you shouldn't need to go any lower.... 10 degrees for starting would be nicer too.

[terrytuffguy]

Yea I had mine going from 35degrees under no load at 6000rpm to 25-30degrees under 10psi which caused it to detonate.

Is it true how you have to get your fuel mixtures right first otherwise you would be chasing your own tail? It's quite hard as I think I may be running to rich which I think is killing my power....

[Bazda]

my timing is at 20degrees on boost @15psi.
this seems to be a safe value and is what most of the 4agte boys run at.
my mixtures are also richer than normal but meh longer lasting engine.

[EVLGTZ]

mine maps through to 16deg at top boost level of 22-23psi

Also running alil extra fuel for safety

[terrytuffguy]

It's damn hard to get your fuel mixtures right on the street, I have a fuel mixture guage but it doesn't work that well.

[terrytuffguy]

Also what about the no load ignition curve, right from idle right up to the rev cut?

[EVLGTZ]

Also what about the no load ignition curve, right from idle right up to the rev cut?

mines 18 thru to 36 on low load.

what ecu are you using ?

[terrytuffguy]

Microtech............Are you idling on 18 degrees? Just curious to know how fast the car advances verus the RPM. I know you have to retard the timming around max torque and then advance it again at the higher rpm.

[terrytuffguy]

Microtech's are way different to use than a link and power FC thats for sure. Still trying to figure out how to use to properly

[terrytuffguy]

MATT DUNN...........You got an idea of what your ignition map looks like? Any help would be apprechiated.

Cheers

[matt dunn]

MATT DUNN...........You got an idea of what your ignition map looks like? Any help would be apprechiated.

Cheers

My car has a LEM V3 and you have a V4 whigh has more rows in it,
so the program in my car will not be compatable with yours.

Also my car runs 100% avgas all the time and has water injection to help control detonation.

And 7.9:1 compression ratio helps too.

All I will say is it runs a fair but more than 20 degrees at 20psi.

Matt

Matt

[terrytuffguy]

I'm running a Microtech which is alot different to use than a LINK. But all the settings would be the same. My aim is 200rwkw, then again peak power ain't no good if the rest of my torque curve is sheeet. Cheers for ya help anyway

Darren

[matt dunn]

I'm running a Microtech which is alot different to use than a LINK. But all the settings would be the same. My aim is 200rwkw, then again peak power ain't no good if the rest of my torque curve is sheeet. Cheers for ya help anyway

Darren

Found another 20v turbo link map on my computer that i copied out of someone else's car that i did a bit on.
Give me your email address and i'll mail it to you along with some other stuff you might find interesting.

Matt

[suberimakuri]

if you're running av and 7.9:1 then for sure you're going to be able to run more timing.
i was running 10.3:1 and 15 lbs, and didn't want to tempt deto.
with 9:1 or so, 25 degrees should be ok.

too much advance is one of the quickest ways to blow up a motor.

[matt dunn]

if you're running av and 7.9:1 then for sure you're going to be able to run more timing.
i was running 10.3:1 and 15 lbs, and didn't want to tempt deto.
with 9:1 or so, 25 degrees should be ok.

too much advance is one of the quickest ways to blow up a motor.

Exactly,
so the program in my car would be of no use.
The other program I have was a road car that ran on 96 so it has a much safer program. It has about 20 deg.

Interestingly too much ign advance can actually cause rund bearings in the bottom of the motor.

Matt

[vvega]

Interestingly too much ign advance can actually cause rund bearings in the bottom of the motor.

that will be from the increased cylander presure from the inaudable detantion

but were talkin right on the edge of full blown nasty motor $&#$% det
v

[terrytuffguy]

boostindazz@hotmail.com. I will be running full avgas as it will be a club car at a later stage. But 96 will do for now till I get it dyno tuned.....

[matt dunn]

Tried to email it to you but it won't send? Is the address correct?

[terrytuffguy]

How large is the email your trying to send?........Sorry I have been away for the past week.