Dyno sheet from GZE tuning

[fixeruperer]

yeh myne was afm bigport dli ae92 from halfcut

[Ben Wilson]

about what PSI is that 165mm pulley running?

ive got:
175mm pulley
mircotech lt10s
large frontmount
bigger injectors and fuel regulator
4-1 extractors and 2.5 inch system
RWD inlet manifold
holden 5.0 LT throttle body

havent put engine back in car yet....im quite interested by other peoples figures and im wondering what mine will make....???

its in an AE86, by the way

Should be interesting, I'm pulling 130kW ATW whith my custom inlet manifold, but only 2" pipework. Just a warning, you'll have real fun making it idle nicely....

[takai]

Should be interesting, I'm pulling 130kW ATW whith my custom inlet manifold, but only 2" pipework. Just a warning, you'll have real fun making it idle nicely....

Heh, you put an FMIC on these things and you have issues making them idle

[JustCallMeOrlando]

A programmable ECU is the way to go, for sure. Just out of curiosity, will a low-end ECU such as a microtech give worse economy in standard driving than the factory maps? If anyone knows...

It depends on how much effort is put into the cruise maps. The factory ECU gets around some of it by being closed loop. The Microtech can perform just as well as the factory ECU in that regard...providing everything is set up properly.

[YLD-16L]

Just out of curiosity, will a low-end ECU such as a microtech give worse economy in standard driving than the factory maps? If anyone knows...

My economy is pretty good with the microtech, it rivals new small cars on the highway, pulls around 9L/100km around town (mostly taking it easy with a few "squirts" every now and then). It's best efforts were around 7L/100km on trips to Sydney.

I get slightly better fuel efficiency across the board with the microtech than the factory ECU did.

Tuned well it will give you decent economy, this applies to any aftermarket ECU.

[myne]

I have to say, I'm not terribly impressed by the smoothness of the graph up there, and I actually suspect there's a bit more power to be gained.

Have a look. The area that sees the most gain (80kph) is also the leanest of the entire graph. I suspect that leaning it out to say 12.6, and smoothing the graph a little should yeild a fair improvement across the board. I could be wrong, but 11.x:1 is still pretty rich even for WOT.

[mullett]

Yeah, that was as lean as he could get it, leaning it more messed with something else. So yeah, I think you're right for sure, but I'm not going to spend any more money on this setup, I'll chase down a Microtech...

RM.

[chris davey]

How is the resolution of the DFA compared to a SAFC II?

I know some 1jz guys were having trouble getting a flat air fuel line because of where the stock ecu was in closed loop and was continuously adjusting.

Re the actual a/f ratio: There was some talk about this on the microtech forums the other day and basically what was found is that the power gained from fuel trimming was a lot less than effective timing tuning. And a lot of the gains that people see with DFA/SAFC sender benders are actually because of the clamping of the MAP (if you have one) which will make the ecu run more aggressive timing as well as put in less fuel.

[JustCallMeOrlando]

The DFA has 128 tuning points throughout the AFM voltage range. Obviously, the Toyota AFM's aren't directly 0-5V, so you lose some there. Then there is the fact that not all the points correspond to WOT.

That said, there should still be at least as many points as the SAFC2.

[mullett]

When mine was tuned there was a total of about 28 load points used at WOT, where an SAFC has about 5-6.

RM.

[chris davey]

So you should be able to get a pretty good fuel tune using one of these compared to SAFC's which from I have seen usually area pretty flat a/f line. For the price of these things, I don't know why anyone would get a safc.

[myne]

Does shorting the test connector stop it using closed loop mode?
If so, you might have more of a chance to get it mapped out properly.