omniscient

I'm not sure yet since I haven't driven it much, just down the road and back. What I have noticed though is the smoke isn't thick and it's not constant. It doesn't even smell like oil. All you can smell is fuel. It takes a couple tries to get it to start in colder weather because I'm not using any idle control, just a turned throttle plate screw. It puffs smoke for about 3 seconds and it's clean. When you gradually increase rpms it doesn't smoke but if you crack it wide open really quickly to say 3000rpm it smokes then clears up...

I've never ran a car on batch injection before so I just got an idea that maybe it's unburnt fuel smoke? I know it's not nearly as efficient or clean as sequential injection at lower rpms.

onlyflash944

well im not sure about all this, if i were there driving the car i could give you a better idea. as far as 'cracking' it wide open, take a look at any old carbed v8 and watch them spank the gas. usually a decent puff out of the exhaust when they get on it, thats just some carbon that had built up somewhere in the cyls. a big puff for 3 seconds at initial startup and idle sounds a lot like valve seals to me. this beast use any oil?

omniscient

Nope it has just as much as I put in it a couple of weeks ago.

I'll have to figure it out tomorrow.

omniscient

Ok. I have an update...

I didn't finish tuning the car because I've been to busy having my mind blown by the tuning features of MegaSquirt. It's freaking amazing. I've never used an EMS with wideband EGO control. It's almost like closed loop mode with a narrow band. Only you use a wide band and target AFRs instead of a narrowband and target voltage. The target AFRs are set up like an ignition or fuel table and MegaSquirt uses an algorithm between the what the sensor reads and the AFR cell in the table and adjusts accordingly.

I know it still uses "target voltages" but it's not on a linear scale like a narrowband. You can leave the WBEGO control on constantly, you don't need to have it deactivate at a certain TPS% or MAP%.

I did some testing with the EGO control. And this is risky and stupid of me, but I set my boost AFRs to 13.5:1 and with the EGO control on and a target of 12:1AFR the EGO corrected the fuel in three pulls.

I was able to autotune my crusing and light to medium throttle within twenty minutes.

I'll have more updates this Saturday along with videos etc. It's supposed to be getting pretty ------ cold though so the car should love it. I've been meaning to get more ---- up here for you guys to look at but by the time I get home it's already ------ dark.



So what I'm saying is if you haven't used MegaSquirt yet.. do your self a favor. It's incredible.

Tom-Guy

Autotune typically turns your fuel maps into hamburger. Manually setting AFRs isn't the hard part about tuning. Purely routine, and it's always better done by hand.

Feel free to ask any specific questions because based off of what you just said I think you need to go real slow and do a lot of research before you try to extract any power out of your car. Not trying to be a dick, I tune for a living homey. There are no secrets here so feel free to ask anything you need to, I'm pretty good about giving solid tech advice and determining something that might be e30 specific/out of my experience, etc.

bimmerman92

do you have any picks of you adapter from t3 to t4 with the ex wg elbow

omniscient

Nah, you're not being a dick man I can see where you're coming from. The whole EGO correction and autotune thing was just an experiment.. A long while ago I was talking to one of my teachers about wideband sensors and variable closed loop function and how it would be cool to actually see. So when I saw megatune had the option I had to try it.

It's actually sad how much research I do. It's not wasted time because I gain something from it but ---- I spend a couple hours every day just reading.

I've actually been tuning for about three years now but I mean it's a hobby, I don't do it for a living or anything. If someone comes along with an EMS I've never used before I don't even charge that person I just want the learning experience from it. It sucks that car season is almost over now.. Next spring I'm gonna be tuning a 300zx with an RB25 swap, single turbo. I think the kids gonna be getting a HX40 as well.

I just filled the tank up and spent the last half an hour or so making the car drivable. MS is different than Crome, Hondata, AEM, blah blah, but it's all relatively the same ----. I pretty much got the AFR's situated as far as crusing goes I want to wait till tomorrow to do some WOT pulls. I think it might be a bitch because the gearing is so long. I'll need to find a nice open stretch on some back roads.

With MS you have to make your own timing map. It took me like an hour to fill in the 144 cells but it drives really well. It's a bit on the conservative side for now, about 18* at 10psi with I think 9:1 compression.

So I mean, I know my stuff and all but I'm always open to learning new stuff and I'm always asking questions. ---- I've been a member since 06 and I've barely posted here..

And there you have my life story.. yeeapp..

And as for the T4 adapter all I did was hack off the T3 flange and welded a T4 on there. And the wastegate I just used my drill press and a hole saw and took a hole out of the collector. Then I welded an elbow with the wastegate flange on there. I can't really take pics because it's a top mount and all.

Tom-Guy

Sounds like you have all the building blocks, you'll be fine.

The car thing is supposed to be about helping people out so - we got your back, holmes. And thanks for bringing some fresh content to the site.

omniscient

Hell yeah man. This site is what got me into forced induction. Back when I didn't really know much I always thought it cost thousands of dollars to turbo a car. Then I saw some ---- with like dryer duct intercooler piping and it was ------ on.

omniscient

Ok, well I did some more tuning. I have soot in my wastegate outlet so it is opening but I think it's creeping. 200kpa is two atmospheres, 29psiA, 14.7psiG. My stock injectors max out at 160Kpa apparently and the car starts to lean out. The wastegate should be fully opened around that area, 7.7psi, but it's not. I wonder if a single 38mm gate is too small for a 2.7? I have a whole bunch of more work to do.

The car is pretty much situated up until it starts to lean out. It goes awful rich for a second as soon as it goes over 100kpa and I can't seem to figure that one out. I think I may have the enrichment coming on too strong.

I was about to go record some videos when I noticed the car was running hot, about 220 degrees.. ----.. For the seconds goddamn time the alternator fan blades cut a hole in my radiator hose and pissed coolant all over the ------- place. So now I have to hunt down another hose which took me almost a ------- week last time this happened.

Other than that the car pulls like a son of a bitch for what I've got done too it. Hopefully I can pick up another hose and keep tuning tomorrow.

Does anybody know whats the biggest size injector bosch makes? All I can find on ebay are 42lbs wich is I think 440cc.