Wondering what the general opinion is for tuning n/a with the wastegate wired. Recently received Mkturbo complete kit. I want to install all the physical parts of the turbo kit (-injectors) so There's not as much waiting around as I have to send the ecu out for repair (will take about 2 maybe 3 weeks). is it highly unrecommended that I do this, or should I be fine as long as I keep the wastegate wired open?

 

nothing wrong with that

 

Excellent thank you

 

You mean running with the Wastegate wired open on stock ecu and injectors?

only if you baby it, shift under 4k.

my Wastegate wired open will still hit 11psi by redline

 

To me sounds like you need a higher flowing wastegate. And no I mean with my megasquirt once I get it back from brain. I have other insured and registered vehicles to drive while the car is out of commission. It's just that I'll be starting out again with the base tune and don't want to wreck anything before it's tuned properly.

 

There are very few turbo's (internally gated) that will be able to hold 0 boost to redline. Very few. So he's right and be careful (seems like you're already planning to be tho)

 

nothing wrong with my 2560 internal Wastegate, that's how all of them are and since I run 15 psi anyway, this creep makes no difference to me.

your post is confusing, you say install all the turbo parts, minus injectors and send ecu for repair, then run NA in the mean time. And now you say run with Wastegate wired with megasquirt tuning the base map.

makes no sense to me.

how you plan on tuning the boost cells if you can't hit them with the Wastegate open?

base tune timing is usually on the safe and retarded side, so just make the fuel extra rich and you won't hurt anything while autotune leans out the fuel

 

No driving it with the stock ecu, it's just going to be sitting for a couple of weeks until the Ms3x comes back. then install it again and start getting the tune dialled in but with wastegate wired open at first. I just want to get the tuned more dialled in before putting a bunch of boost in letting it auto tune.

 

well if you put it this way, then yes, its perfectly fine. but you will still hit some boost cells even with wastegate wired open.

thats not what your first post says though, not sure why you said install everything minus injectors.

 

I never said I'd drive it at all in first post. I just wanted to get some tuning with it with the stock injectors in and have it running nice before putting in ff injectors and starting to get into boost.

 

you need to drive it in order to tune it?

unless you will wire wastegate open, and sit idling in your driveway for said tune?

ok, i am done. i feel like im in the twilight zone, nothing you say or post makes any sense to me.

 

Sorry I meant no driving it around with the stock ecu, and the driving that would happen would be with the megasquirt in. But ecu is out for repair and I want to install the the physical components now besides the injectors. Then when ecu gets back do n/a tuning and stay out of boost until that part is all good then start going into boost

 

From what i understood you want to learn engine management on a NA setup first before you get into boosting right? So you plan on installing all the turbo parts, wait for the ms to get repaired, install it and open the wastegate to "simulate" a NA car. What everybody here is saying is, that you are still able to hit boost even when the wastegate is stuck open. So keep that in mind. Or just wait with the turbokit installation if you want to learn on an na car first. I hope i figuered out what you are trying to do. Let it be said that this procedure is not really common.

 

Exactly, this is why I was asking if it's a dumb idea or not.

 

Just have a pipe made to bridge your turbo manifold to your downpipe. It could be easily jigged off your turbo and just swap the snail in when you are ready for positive pressure.


edit:

For a T3 - $52
https://www.cxracing.com/EB-T3-250V-...dapter%20elbow

 

I guess that would work if he drilled out the threaded holes to allow for the studs on Lars's manifold.

 

Tuning the car before changing the injectors is a waste of time - you'll have to start the fuel map over with the new ones. In theory it's simple to change injector size but I found that I had to redo mine when installing FF 660's.
I'm also confused why you would wire the wastegate open instead of just using less throttle, if your goal is to stay away from the boosted cells.

​​​​​​Or, unhook your charge piping after the intercooler and stick a filter on it. Boom, N/A miata.