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But as I said the port could be flowing, and a restriction be between the plenum and the port (so in the runner) map will still read atmospheric, but the pressure at the inlet valves actually be under a slight amount of negative pressure.
But anyway, we're very much getting away from the point...
The fuel trims are only as good as the lambda sensor reading the mixture. Assuming, they're all ok is asking for trouble.
As for the map sensor and "damning" that would be correct on a forced induction engine. However tuning with atmospheric pressure means that it would create vacuum rather...
I'm willing to do so, but sadly that would bump the costs up for everyone. He'd have to pay me for my time, aswell as the additional casting changes, testing again etc.
Fuek trims won't tell you anything really. Also as the map sensor isn't at the intake port but is actually in the plenum it won't say if there's a restriction anywhere after the plenum which is where I believe the flow issues will be, or can be improved.
I think that's a good option, or just an o-ring will solve it.
The RS 2 is deeper down wards towards the bottom of the engine block, which is where it gets the volume from.
The leaking pipe is just a plastic fitting with no form of seals. If it leaks with equal pressure, it's certainly going to leak with 15-20inHG negative pressure. But as I said this is easily sorted with an o-ring.
There's only so much you can do with timing safely. Timing itself doesn't really get affected that much with inlet mods.
Yes exactly that, it's running rich, before and after so it's made no difference atall.
I'll explain simply why, just for those who haven't a clue why I'm saying what I am.
Say the engines got just the usual induction kit, matched inlets and exhaust. You map it for around 12.7:1 AFR. (12.7 parts air to 1 fuel) you've now added this inlet. Let's say for arguments sake, it's now...
If it's running rich its lost flow against the previous setup.
I've had a quick look at ads, namely checking it before fitting and glad I have. Bolted it up to a spare cylinder head and found its got a few leaks (used a snap on smoke tester that I use for finding such issues!) and found both...