Nissan 370Z Forum - View Single Post - anyone else having rain issues with injen cold air?

ZForce · 04-11-2011, 12:19 AM

Update: Injen Hyrdo shields installed and the verdict is in: They restrict some air flow.

After installing the hydro shields, the exhaust (Nismo S-Tune), Berk HFC and CAI sounded garbled from 1500 - 3000 rpm. As though the CAI was grasping for air. Thereafter it would pick up from 3000 rpm upwards pulling strong but not coming on (if even that) until 5000 rpm.

Now for the mod: Sliced out (with a razor blade) a .75 x 1.25 piece of the under carriage near the front wheel well, next to the wheel wind deflector. The new hole is cut in the shape of "C"and then folded back.

The results were amazing! Increased air flow over the filters. I regained all of my low end without the garble and it really comes on at 3000 rpm and really punches it at 4000 rpm upward.

One last observation: I proceeded to cut out the bro's Z and his does NOT have the hydro shield installed (yet). The result was a tad less successful then with the shields installed. It did well and was an improvement over normal setup but not the same as with the shields installed. I should have reduced the dimensions of the cut.

A note to those with wanting to test this mod but not wanting to install the hydro shields. I would sugest only cutting half of the the original dimensions. Cut an oval in the size of .35 x .60. Then trim extra as needed to achieve the best volume of air passing through the hole.

If cutting and installing hydro shields then make cut with dimensions at top of this post. The jury is still out as to whether the shields have any benefit. The rain has stopped for the time being. Until the next wash or heavy rain, the results are still out.

If it rains I can always unfold the cut piece and let it hold itself in place or place some duct tape over the flap to keep it in place and water proof.

Butt Dyno = 6
Mod factor = 8 (increases air flow over the air filters and the mod is not visible)

04-11-2011, 12:19 AM	#25 (permalink)
ZForce A True Z Fanatic Join Date: Jul 2009 Location: Roseville, CA Posts: 2,359 Drives: 09 370Z Tour + Sport Rep Power: 21	Injen Hydro Shields Update: Injen Hyrdo shields installed and the verdict is in: They restrict some air flow. After installing the hydro shields, the exhaust (Nismo S-Tune), Berk HFC and CAI sounded garbled from 1500 - 3000 rpm. As though the CAI was grasping for air. Thereafter it would pick up from 3000 rpm upwards pulling strong but not coming on (if even that) until 5000 rpm. Now for the mod: Sliced out (with a razor blade) a .75 x 1.25 piece of the under carriage near the front wheel well, next to the wheel wind deflector. The new hole is cut in the shape of "C"and then folded back. The results were amazing! Increased air flow over the filters. I regained all of my low end without the garble and it really comes on at 3000 rpm and really punches it at 4000 rpm upward. One last observation: I proceeded to cut out the bro's Z and his does NOT have the hydro shield installed (yet). The result was a tad less successful then with the shields installed. It did well and was an improvement over normal setup but not the same as with the shields installed. I should have reduced the dimensions of the cut. A note to those with wanting to test this mod but not wanting to install the hydro shields. I would sugest only cutting half of the the original dimensions. Cut an oval in the size of .35 x .60. Then trim extra as needed to achieve the best volume of air passing through the hole. If cutting and installing hydro shields then make cut with dimensions at top of this post. The jury is still out as to whether the shields have any benefit. The rain has stopped for the time being. Until the next wash or heavy rain, the results are still out. If it rains I can always unfold the cut piece and let it hold itself in place or place some duct tape over the flap to keep it in place and water proof. Butt Dyno = 6 Mod factor = 8 (increases air flow over the air filters and the mod is not visible)