CARBURETION and your Large/Small port 16V 4AG

[dr.occa]

BenR Wrote:

dr.occa Wrote:

BenR Wrote:You can still use the Stock ECU to control timing if you continue to provide it with a semi stable map and TPS signal, its not redundant.

If not, why bother with all this hard work for sorting a crap ignition curve when you cna just buy an ignition only management system?

And it wouldn't be more work to rig up a "semi stable map" signal along w/ jury rigging the TPS just to be able to use the efi ECU (which you won't be able to manipulate w/o extra work and extra money)? I'm not arguing that it isn't do-able. Anything can be rigged up. The information provided above is to facilitate not to convolute the process in converting to a carbureted platform. What I've outlined above is straight forward.

As for a "crap ignition curve" I would ask, how would it be "crap"? I guess it would be schite if compared to let's say a mega-jolt, haltech, electromotive, etc...stand alone system. But I would argue that they all would produce a turds worth of timing in unskilled hands and conversely. Maybe then, our japanese counter parts using the archaic kp distributor adapted to the 4AG haven't a clue that they're using "crap" to achieve only a "crap ignition curve".

Do this, go through what's been outlined above and show where failure would occur in the process drawn out. If there's an even quicker, affordable(a method accessible to all that wouldn't necessitate illegal activity) and easier option w/ an =/> effect produced then by-all-means please share.

Sorry, am i loosing the plot or is using the stock ECU a simpler and easier affair than buying aftermarket ignition components only to be lefth with an rpm based advance curve like something out of the 70's?

Tap the inlet manifold on each runner, run to a vacuum manifold to feed the vac and the brake servo. Keep the dizzy feeding the ECU with speed information, adapt the tps sensor to the carb spindle (not really an issue if your considering jigging a KP dizzy up to fit a vage head). And to have someone remap it would cost what, a couple hundred euros to tweek the tps value settings and ignition map to suit the rapidly increasing map signal with throttle opening?

In my eyes this seems like the fastest, easiest and cheapest way to get a 3d ignition curve that would provide more torque and economy everywhere over a 2 d curve that platues at 3000rpm:S

Or, if your feeling fruity, 380 euros will buy you an igniton only ecu, then put on a toothed front pulley, a tps sensor, away you go, map your own curve and have infinate adjustability for any further advances in engine specification you have.

As for the japs, every JDM import, not matter how 'mint' requires days of work to fix the bodges they love so much. Just because its from japan doesnt mean its good, its like anywhere else, a few good outfits and the rest at monkeys.

...hmmm, inspite of my repeated efforts in reminding that this is an bird-brained essentials list (almost like carbed 4age for dummies) i guess it's highly important to change the initial intention behind the thread. obviously you're in the wrong class Professor. this is carbed 4age 101, the class you're looking to head up is 201.

BenR Wrote:Tap the inlet manifold on each runner, run to a vacuum manifold to feed the vac and the brake servo...

though i agree that this is an easy enough task (although i only used cyl 4 for the brake booster) w/ the TPS and ECU mod, it's going to take longer and more money. Simple, "caveman" technology can be had for practically a steal. 70's technology, hmmm...but yet there are some classic cars still running around with this rubber band & paper clip invention that would leave almost every 86 behind on a 1/4 mile.

again, this falls under the heading of "IG-NI-SHUN". it is upto the individual what product they go with. i made a simple suggestion that i know works better than static full advance. if the end user wants to get more elaborate than by all means, they are free to do so if it is within their abilities.

BenR Wrote:As for the japs, every JDM import, not matter how 'mint' requires days of work to fix the bodges they love so much. Just because its from japan doesnt mean its good, its like anywhere else, a few good outfits and the rest at monkeys.

HUH?! ummm, ooooook...the Corolla is from Japan...
if it's good enough for "backwards", stick utensil-using, karate-chopping tuners, it's good enough for a fellow flip-flop wearing, judo flipping enthusiast in the states. i'm not about to express any of my bigotry towards how others accomplish the tune. if they accomplish it, they accomplish it. whether it's better than my methods or not. you sure are taking a ridgid stance when there's more than one way to skin a cat. learn to be more flexible especially in an area that has no bearing on the eternal.

when enthusiasts are ready to go for an upgrade they'll do so when they're "ready".

Let's keep things simple first everyone. noone's any less of an enthusiast just because you're still trying to drive around in a 20+ year old car with an aged suspension :wink: