People who have converted to direct port - SRT Forums

Adionik · 08-16-2009, 05:09 AM

Anyone here go from a single nozzle to direct port? Gains noticed?

I am ready to do this, just saving my cash. 4x m2 nozzles and since i'm on stock turbo i'd like to see if I can get away with a 70% water and 30% Meth

**bitts** · 08-18-2009, 08:00 PM

^
You stupid ABBA fan

Novak94 · 08-19-2009, 02:56 AM

yea im interested in what the gains would be too? Im gonna pick a kit up for my S3 soon.

Adionik · 08-19-2009, 03:25 AM

I think i'm just going to add a second nozzle

7055 · 08-19-2009, 03:32 AM

I thought you wanted better distribution? That won't help with distribution will it?

turbojack · 08-19-2009, 03:22 PM

Quote: Originally Posted by 7055

I thought you wanted better distribution? That won't help with distribution will it?

If two medium nozzles are spaced at least 6 inches apart form each other then this is better then one huge nozzle.

Port injection is great but really shines with tuning, it also adds parts and complexity. Without tuning theres less of a dramatic effect.

Also typically with injection point locations there's a trade off on one versus another. Closer to the IC exit tank the better time for the fluid being injected to remove heat from the charge. Closer to the combustion chamber the better for knock control. The thing is ideally you want to remove heat and effect knock and with knock heat of the charge is part of the equation.

There no real wrong location. What could be wrong is putting a single large nozzle/jet very close to the thottlebody and risk un even distribution to all cylinders because the intakes on fuel injected cars such as the SRT-4 are designed for dry flow not wet..............the rule that applies with single nozzle nitrous injection is for the same reason. Another wrong for many installs is prior to the IC inlet tank.

Adionik · 08-19-2009, 03:58 PM

Well i'd love to go direct port, money doesn't phase me, it's just that i'm worried about one of the 4 nozzles getting clogged or messing up. That would be a huge pain in the ass to troubleshoot. I guess you could just take off the manifold, shine a light and see which is not shooting. But with a single/dual setup it is a lot easier with less to go wrong.

Distribution does really bother me, and I think I could handle KR a lot better with more water closer to the chamber. I'm not sure...we'll see. I have a few guys local here running DP, and i'll see if their setups give them any problems in the coming time.