I installed an airdog 150 and have noticed a couple things no more hesitation while on level 2 or higher with my edge juice/attitude(expected), and seems like the turbo bark is about nil(unexpected). I can still get it to do it occasionally, but it just doesn't do it like before. I am really scratchin' my head on this one?

It's possible i'm driving differently, but I don't think so. That leaves what......more fuel......better......what? Why does this thing seem to not bark anymore? Not complaining or anything just really curious. Is this in my head? Seems like it has to be cause I've never heard anything like this before.

Give me your theories
Thanx

 

It's gotta be in your head. The lift pump would have no affect on turbo bark. If anything, more fuel would make it bark more/harder.

 

I don't know about "bark" but my surge or flutter completely goes away when I add fuel via my VA box. In other words, I run around 90% of the time with 100hp via Diablo programmer. When I accelerate moderately (not wot) I get some flutter/surge at around 12-15psi of boost. I either get outta it or give more throttle to avoid it. When I flip my switch for an extra 70hp from my VA, it cruises right thru this area of boost quickly at same throttle with no flutter. Maybe it's just my setup but something is different.... ???

 

No major arguments here. Sounds Logical.

So what you are saying is you have noticed the same thing more or less? You've got a upgrasded fuel system (walbro pump IIRC) and when you turn up your programmer you seem to escape the turbo bark.

Man to me this is like thinking of something and its on the tip of your tongue, but you just can't put it into words. Seems like it should have no affect whatsoever, feels like I'm just at the edge of understanding.

Somebody think up some scientific reason for this. If there is one? Not enough doesn't really count

 

Turbo bark is different from what (I think) Trik is describing. Barking happens when you lose boost quickly (letting off throttle or between shifts).

 

Don't know for sure but I'm not imagining it. I think, stress THINK, that my turbos map and my fueling don't match up all the time when I'm at a lower power/fuel level... meaning how much fuel am I'm feeding with duration at the injector. So I have more air being fed by the turbo than my engine can handle at this lower boost condition, hence the surging... yes I said "hence"...
When I turn up the fuel I reach a point where there is more equilibrium between fuel and air and the turbo is much happier... and so am I....

 

Yes... but I think they are two of the same just in differing degrees. Barking is MUCH harsher than surging. They are related, as in extra air not having anywhere to go and being sent back to the compressor. Bark is one big BAM and not good... surge is a fluttering of air back to the compressor... I think... at least that's the way my mind sees it...

 

That makes sense to me.

I guess it comes down to what form Sandaholic is experiencing. Your issues could be related, but occurring under different conditions. If he was getting bark from letting off quickly then extra fuel wouldn't have helped. If he's talking about the surge/flutter under power then it makes sense that extra fuel could of helped.

Which one were you getting, Sandaholic?

 

I was talking about from shifting. When the air seems to be forced backwards into the inlet side of the turbo.

Well I guess time will tell. If I can't get it to bark anymore while really gettin' on it, then that will tell me it does have something to do with the fueling. It's too much of a coincidence to not be connected. Maybe it's from a better combustion, Im gonna give it some more thought. Probably not worth thinkin' about to hard, but it's got me wondering.

Thanx for the reply's

 

I was just talking about this again the other day. I still don't have the barking issues I used to have?

The only thing I can think of is that subconciously I have been driving differently to avoid it? It just seems so odd that it stopped happening when I installed my airdog?