I get it now. We're taking two different input paths and changing it to one.

Awesome

 

Sign-in if you're writing in MSLabs for President, 2012.

 

Is this like "crossing streams"?

 

First Google Images result for "crossing streams"

 

I assume your safe search was on?

 

those photos are from my VVTuner. it does not have any wires in it. the 15 pin connector is thru board mounted. the wire you see in the photo are the two jumpers I added. maybe there are two versions of the VVTuner? one thru board and one with wire/leads to the connector.

 

Sounds like there are two versions. Yours with the R/A through hole versus a straight one with solder cups

 

Good to know I have the solution to both versions

Thanks again Graeme and Reverant

 

VVTuner uses a standard right angle, through hole boardmount D-sub. There is no VVTuner version that uses an internal solder cup connector.

The other question is why is VVTuner occasionally causing a sync problem with MS2 in pass-through mode? That I don't know. This would be the 3rd report of it. We've been unable to replicate the problem in either pass through or parallel mode with MS2. Kevin's 01 swapped 90 recently spent days on the dyno, running without sync loss.

We want to find or fix, but we can't find the problem.

 

Thank you Sir Ben

 

Why not make the adjustment that Graeme made for all? Is there a reason this won't work? Since I have the problem, I'm happy to help you track down the problem if possible. I'm an idiot though so that's unfortunate for both of us.

 

Because we haven't observed the problem, so I don't want to fix what I can't find to be broken. The only 3 reports of this problem are you, Graeme, and Reverent. I'm not dismissing this in any way, don't get me wrong, but I don't know why it's just you 3 guys on this forum? We sell lots of these things, with no other reports of issues.

Also, that fix relies on a parallel install with pullups in the other ECU, so it would actually break standalone functionality.

The only commonality I can find so far is it is 3 reports on 1 forum, and all 3 had MS2 based ECUs (though different versions). So that leaves me to believe that is related to MS2 and VVTuner, but our own car works brilliantly with this combo.

If there's a problem, we want to find it. I just need more. Is your ECU plug and play with a standard 1.6 harness? If so, we can put it on Kevin's car.

 

Nope, 1994 harness. Unfortunately I don't have a VVT head on my track car which is a 1991.

Thanks for looking into this.

Who installs a VVTuner stand-alone and why would anyone want to?

 

I don't have a 94 with VVT swap here unfortunately.

VVTuner is sometimes used on swapped cars running non-MegaSquirt management (including stock). Deleting the pullups from all boards would break that functionality as well as pass through functionality that works for everyone else.

 

Can you run VVTuner on a non-vvt OEM computer and get an increase in performance without destruction?

 

Yes.

 

I sent 3 emails to DIY about this over several moons, many many moons ago and they never responded to any of them.

It would be interesting to see what my stock BP4W ecu + BP6D head + VVTuner would do. I haz a boomslang somewhere in the garage too, but I'm broke and see no VVTuner in my future :(

(Hustler: buy my vvt head!)

 

Yes. You leave some on the table compared to a standalone, but a NA6 with VVT swap, stock computer, and standalone VVTuner will make substantially more torque than stock. With the same swap but without VVTuner, you leave a huge amount of torque out of the mid end. A standalone can still mean 10+ ft lbs down low and 5+ hp up top (on a stock engine).

You may need to check the email address you are sending to, or perhaps your spam folder for the replies. We usually answers emails sent to websales@diyautotune.com the same business day they are sent. We get a huge volume of emails, so it would be possible for an email to slip through the cracks (nobody's perfect), but there's no way we missed 3.

 

Thanks Ben, but this was literally years ago so no worries. It wasn't until today that I even knew this would work with the stock ECU as your site does not explicitly state this.

Are you guys EVER going to offer the VVTuner as a kit, because I would definitely buy one. I'd also spend money on a PNP harness for a 99/00 ECU.

Like Hustler, I'm a moran and don't know how to take this:



and magically splice it into this:

http://www.madracki.com/miata/images/wiring/00sys.pdf

without causing this:



(Note: I haz correct boomslang and would pay one of you goobers to build an interface harness. PM me)

 

Fixed? We'll see tomorrow.