2016 OVTune Tacoma 3.5L Manual Transmission / Engine ECU Reflash

Somewhere in this thread or the other OVTune alfa thread there is a link to a free version of Toyota Techstream.

 

Yup same thing here. Im not tuned yet, but get the knock you described. For me it happens when i let off heavy throttle then role back on to medium throttle. I get a quick second or so of what I would describe as spark knock. Mostly when temps are above 85. I was hoping the tune would fix this, but looks like not.
Ned

 

OV TUNE
If the knocking is there stock tune,it seems as though Toyota designed it that way.
With most Toyota engines known to last over 400k,is it possible Toyota is skimming off the life of the engine to get max fuel savings.
If so can you fix this?

 

I remember a bunch of talk about how bad the stock spark map is.. I know changes were made in the 91 tune but those are left out of the 87 on purpose.... Just wondering if maybe some of it other than the more aggressive advance could get brought over?

I'll work on setting up logging tonight and start gathering, @OVTune did you ever get good logs from other manual trucks?

 

Toyotas stock tune uses multiple ignition tables, some being quite aggressive then uses knock to trim.
it's an issue that exists on more models than just the tacoma. To make the engine run a different strategy requires a lot of changes to the tune.

Even the LC500 5.0L on 93 octane knocks bone stock, The 3.5L Camry (same engine as this) knocks

It's just how Toyota designed their ignition strategy.

 

My truck knocks briefly at midrange RPM too, but just when I first get into the throttle. It lasts for about a second. Never when I lift.
I should also note that it doesn't happen every time either.
1.04A 91 file on 04B10 ECU.

 

Ah this has finally cleared up my question about the 1500 rpm knock on my 2nd gen . Tacoma . Thanks Mat

 

http://blog.obdii365.com/2017/05/09/toyota-techstreamv12-10-019-free-download/

 

Was kinda hoping that if I didnt check up on the thread for an extended period of time, a flood of info about progress on boost r&d would pop up. Dammit lol

I won't even be buying the turbo kit right when it drops either. It just has me excited since I'd like to do it later down the road.

 

Sorry???



Apparently all the good stuff is happening in September!

 

Judging from your avatar one could assume that you wheel your truck. Why would you ever consider running turbo's in an offroad vehicle? Are you doing high speed desert stuff or crawling? Turbos will provide no benefit to a crawler.

 

Ziggy doesnt crawl, but he needs the power to pull out all the fools that get stuck when he's out cruising the trails.

I'd consider a turbo setup, could help tremendously towing. I'm undecided at this point, I think it'll depend mostly on the timeline and if Toyota updates the tacoma powertrain anytime in the next couple years (I'm not counting on it).

 

Would definitely help towing as long as you're tuned where it'll spool up at a low enough RPM. One thing people don't get about Turbos is that they are useless at lower RPMS. Myself, coming from the turbo Supra world in the mid 90's there's a lot of work that has to be done to get low RPM spooling. It cracks me up that some of the people on here think that a turbo is going to make them wheel hard AF or make their rock crawling experience truly amazing. I get it if you are a desert racer, but for rock crawling, a turbo or super charger is completely useless.

 

I believe Matt said he's trying to make decent gains at around 2000-2500 RPM (I'd have to go back and find it for sure). Even a small boost in power in that range would help this truck a lot.

I'm excite to see what 1.05 brings. If that can get us some more low end performance, then add in a TT setup, this truck could be pretty amazing. We'll see what happens.

At the rate I'm going, I'm going to have 100,000 miles on mine by the time the turbos are finally available.

 

Even 2000-2500 RPMs is too high for crawling. Would be great on the highway though.

 

Decent gains at around 2000-2500 RPM !!
Sounds like full OTTO

 

Man, you ain't letting go of that bone.. are you?

 

Damn man, a lot has changed since your supra in the 90s! a lot has changed since my turbo experience ten years ago too.

Drive any twin turbo, and you'll realize all the points you made are now moot. Ecoboosted f150 would be a great example. Full boost from 1500rpm all the way up. It adds power anytime the engine is under load. No waiting to spool, almost no noticeable lag.

One turbo spools up early, and helps the other spool for high rpm. Some have variable vane turbos that achieve the same thing. Twin turbos would be God damn amazing for everything

 

Had my Supra up until a couple years ago. Spent thousands upon thousands of dollars to get low end boost and still wasn’t able to build significant boost until around 3k. I happen to drive a very built twin turbo’d quite often so I am very in touch with modern turbo systems since I happen to drive this when I don’t feel like driving my truck. Even my V10 R8 bone stock doesn’t get boosty until 3k on the tach, granted 3k happens really fucking fast but still.


We have an eco boost F150 at work and it’s designed to build low end boost for towing. Aftermarket turbo systems are designed for making power but unfortunately on a motor that wasn’t designed with a turbo in mind is going to take a ton of cash and time to get it where you want it.

I was in the drag car game for a long time both amateur and professionally and still work for an NHRA team as the owners pilot.

Putting turbos on a crawler is the absolute dumbest thing anyone could do. Low RPM boost production is really hard on a turbo and for crawling purposes, it’s not practical. I think you are missing the point. Turbos are designed for building power throughout the power band and beyond during the increase in engine RPM. Maintaining boost at 1500 RPM’s while crawling would be extremely difficult and not produce enough boost to do anything because RPMs and speed are not increasing. Turbos are not designed for low rpm steady state use. You will get the initial spool up but once the RPMs settle and become constant, the turbo becomes ineffective since it requires increasing flow to produce boost. Ever listened to a turbo once RPMs become steady state? The whistle stops and boost declines.

 

Trident, what an awesome response! Well you know your shit, but also concede a well designed system a la f150 is good for low rpm torque for towing. So what is that other than low rpm high load? It doesn't matter if flow is increasing or steady if the a/r is right for that flow. How about large ship engines, 2 stroke or 4, that are blown at a constant pressure? Many live at a constant rpm and change speed and even direction by adjusting pitch on the prop.

As far as being an aftermarket system, I really am not up to snuff on the similarities but I believe our engine is close to the ls500? And if so we may be using a very similar setup, so close to oem.

Obviously as you come off load, you lose boost. Doesn't mean it can't come back on when you crack the throttle, if it is well designed. I would say you could use more power to get going with large wheels/tires, armor, rock crawling.. if you wanted it why the hell not?

Sure would be fine for flying down fire roads, grunting up a hill, towing, etc.