Hey guys,

I've always run my TR (2.6 carb, auto) on PULP since I got her, so i figured I may aswell advance the timing a bit and hopefully get a little more power as well..

On an older engine it's just a matter of moving the dizzy, is this the same on a TR? Just move the dizzy down a few degrees until it pings then back slightly? Just wondering if there is anything else I need to worry about, I've read the 3rd gens won't allow this with the stock ECU but doesn't apply to 2nd gens yeh? Also if there is anything else anyone thinks I should know please let me know!

Cheers :happy:

Not sure about the carbys but Im pretty sure all 2nd gens had a knock sensor so you dont need to advance timing manually.

Not sure about the carbys but Im pretty sure all 2nd gens had a knock sensor so you dont need to advance timing manually.
A carby wouldnt have the electronics (well not an ECU anyway) to work a knock sensor.
But yes your right, just move the dizzy...

ive done the same experiments on mine, however mines efi. have noticed differences in economy and performance(flatspots, torque curve etc) use a timing light to be precise and move the dizzy a touch down

Not sure about the carbys but Im pretty sure all 2nd gens had a knock sensor so you dont need to advance timing manually.

Knock sensors do not advance the timing AFAIK, they just cut it back if there is knock.

Knock sensors do not advance the timing AFAIK, they just cut it back if there is knock.

knock sensor will retard the timing if there's a knock.

Mate, you can advance the timing using the dizzy, no probs. you'll get higher RPM, hence more 'power' but you will also increase fuel consumption.

I say 'power' because all you're doingg is moving where the power comes in.

Knock sensors do not advance the timing AFAIK, they just cut it back if there is knock.

Knock sensors do not cut back spark adv, the ECU is programmed to do that. This is the most common system.

Some ECU are mapped to a base ignition number then adv the spark at intervals and "listen" for knock. If OK they adv a bit more until knock occurs then back off a couple of degrees. Some systems do this check constantly for economy primarily, and sometimes for performance.

Cheers,
Alan

Mate, you can advance the timing using the dizzy, no probs. you'll get higher RPM, hence more 'power' but you will also increase fuel consumption.

Advancing the spark to the optimum REDUCES fuel consumption. The engine burns more of the fuel in the short time available for combustion, so power goes up, allowing you to use less throttle.

You won't necessarily get more RPM. You might, but its unlikely, and the 2.6 is best changed up early anyway.

Alan

Advancing the spark to the optimum REDUCES fuel consumption. The engine burns more of the fuel in the short time available for combustion, so power goes up, allowing you to use less throttle.

You won't necessarily get more RPM. You might, but its unlikely, and the 2.6 is best changed up early anyway.

Alan

spot on,Yann,you wil get a higher RPM,only at idle though due to the increases advance,you counter this with the idle screw to bring it back to normal,as alan said,i have seen advanced or retarded (in some cases) timing,produce higher power and torque across the rev range

Steve

Cheers guys, I'll give it a crack next time I fill up with some premium, got normal unleaded atm since I was comparing econ/performance.. :happy:

Cheers guys, I'll give it a crack next time I fill up with some premium, got normal unleaded atm since I was comparing econ/performance..

Dont forget you don't have a knock sensor...so do it slowly. Couple of degree and drive and so on.

Each engine is different but i wouldn't go much more than 5% to start with.

if the idle gets to ruff your gone too far. you can get away with heaps at idle but if you floor it too long ..Bang!

The engine will let you know if your listing.

Also run prem in it for at least 2 fills to make sure the octane is up.

Love to see how it goes.

My friend had a corrona 4 pot carb and we advanced the ignition on prem to the max as we didnt give a stuff about it to much.....the idel was shot when cold but it went hard for what it was..very responsive and most people thought it had engine work done.... when filled up with std gas it pinged its **** off at max revs acceleration before the auto changed gear ...never missed a beat and didn't blow up...got about 50,000k's out of it fine. Car then sold still going.!!!

I still say be careful as all motors are different...