BCN

Is it possible to configure the NA-Tune to run on 87 Octane at sea level?

Rogue_Ant

$20.

Mid-grade is what should be used, so whatever that is for you (for us mid-grade is typically 87).

Dimi 944

Would you be offering the MAF with a straight pipe housing?

Rogue_Ant

Not at first. If there is a demand for it, then I will take a look into doing a straight-pipe housing.

You can always just use an adapter (no affiliation):

ebay AFM adapter

Dimi 944

OK. I am interested in avoiding to downsize the cross section area from the oval side to the square/rectangular side that bolts on to the air box if that is the case. As well as to avoid disturbing the air flow when passing from the round shape to the other as my plan is to make a custom air intake system using mostly cylindrical components.

*bj*

Josh, can you point me in the direction of more information about this turbo setup? Especially interested in the use of E85.

http://roguetuning.com/944na_internals_-_the_limit

Rogue_Ant

bj, what exactly are you wanting to know? I bolted up all the normal turbo hardware to an 944NA short-block, and drove around like that for quite a while...

*bj*

I'm trying to get an idea of what's involved in getting an NA engine running a turbo at 10psi fairly reliably like you mention on that page.

So you used a low compression Turbo head along with all stock turbo components (turbo, intercooler, engine management etc)? Internals were stock NA bits right? For E85 did you have to change any fueling components, like injectors etc?

Rogue_Ant

On E85, a NA short-block would probably live for a very long time on 8-10psi, assuming a good tune.
On pump-fuel, I would limit that to 6psi, and definitely want a good tune.

The Turbo head would give the same compression, but does have the better exhaust valves and ceramic ports. Otherwise, yes, all stock turbo components, though I used a K27, not the stock K26.

E85 requires both the added fuel capacity, ~30% larger for the same airflow, and the tuning to account for it. So, on an NA at 6psi of boost w/ E85, you would want/need close to 50lb/hr injectors. The stock fuel-pump, if it is the same as the 951 pump should be ok.

*bj*

Thanks for that info Josh. Were you using one of your 'off the shelf' tunes for this, or something custom?

Let me know if you'd like to chat via PM instead so as not to clog the thread

Rogue_Ant

I was using my M-Tune setup (951 MAF kit), with appropriately conservative mapping to account for the higher compression ratio of the NA short-block.

Eric_Oz_S2

S2

Rogue_Ant

Ha, I know Eric... I just announced the imminent release of my DME logger:

https://rennlist.com/forums/944-turb...me-logger.html

And I'm also working on the web-page for the NA-Tune ordering now... Then I will be working on the S2 stuff.

Chunkerz

I'll be watching it like a hawk

F40LM

Ok, I will admit it, I have checked Josh's site about 6 times today. Who else has done so????


michael