A little experiment, Ljet cold start Options

[Porschef]

After all the trials and tribulations by some of the Ljet crew and their struggles with cold starts, it came to me in an early morning haze this morning that maybe I should try bypassing the AAR valve and rigging some sort manual one. I figgered if inadequate air was creating the low idle at start situation, then maybe this would be a way of seeing that an increase in air would remedy that.

Ok, so I pulled the AAR, and set out to get what I needed. Well, here’s where a little laziness took over, I thought before I through that, may I’d see if a total bypass would work…



Here’s one of the AAR hoses going from the plenum directly to the intake boot.

So being diligent on startup as to not allow a potential crazy high idle, I gave it a shot.

Wouldn’t you know, while it was a bit balky to start, when it did the idle shot right up, and I shut it off. Knowing what to expect on the next attempt, it went up to just about 2k rpm, then crept up more. It was enough to convince me that inadequate air is getting into the engine with the stock AAR (which functions perfectly) and that a slightly larger one like VanB has installed will probably be the ticket.

Thanks to @Van B @StarBear and @Wonkipop for their quest for perfection (IMG:style_emoticons/default/beerchug.gif)

[Van B]

BTW, your AFRs are perfect!