plenum spacer? the benefits? - Nissan 350Z Forum : 350Z / 370Z Tech Forums

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Old 10-13-2005, 01:11 AM   #1 (permalink)
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ive searched and nothing comes up, does anyone know the benifits of a plenium spacer? or where i can search or info?
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Old 10-13-2005, 01:18 AM   #2 (permalink)
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nevermind .....:>http://www.motordyneengineering.com/PlenumTheory.asp
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ive searched and nothing comes up, does anyone know the benifits of a plenium spacer? or where i can search or info?
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Old 10-13-2005, 01:50 AM   #3 (permalink)
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well it bascially allows the Z the breathe better. i woudlnt mess with this and i suggest replacing rh upper intake plenum such as the APS one
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Old 10-13-2005, 01:54 AM   #4 (permalink)
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Quote:
well it bascially allows the Z the breathe better. i woudlnt mess with this and i suggest replacing rh upper intake plenum such as the APS one

+1, less variables by doing this. If the spacer has a leak, it will hurt performance, and there's 2x the chances of a leak with a spacer. Get a plenum.
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Old 10-13-2005, 08:45 AM   #5 (permalink)
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The spacer is a cheaper method than buying a new upper plenum of getting more air to the engine.

If you have the money get a full plenum, if not get the spacer.
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Old 10-13-2005, 08:59 AM   #6 (permalink)
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its been proven to equalise the airflow front to back of the stock plenum, that should make higher rpm of the stock engines a bit more smoother, but i think the biggest gains are in ME's latest thermal parts

also note, the spacers dont work on the 300hp engines because the new plenum is already airflow balanced
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Old 10-14-2005, 12:46 AM   #7 (permalink)
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It increases airflow (by increasing volume of the upper intake manifold) to all cylinders, specifically the front cylinders.
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Old 10-14-2005, 12:03 PM   #8 (permalink)
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I have had the MD 1/4 spacer since they came out. It is well built and well designed and Tony is a stand up guy. It came with every bolt, every washer, gaskets and all. The AAM angled spacer does not come with all of that (most visit the hardware store), has the bolts torquing at an angle and has not proven to make any more power than the MD one. Skunk2 is making thermo spacers now but not supplying gaskets and apparently wont fit under the stock strut bar. If you look on the evil board, I think there is a GB on the MD thermo ones right now.

For me, I like that the car still looks stock when you open the hood (besides the Injen that I have a CARB sticker for), I am sure it would pass smog with this in place as only someone who knew exactly what they are looking at would even notice. Most Z people don't see it, so it's not a show part.

If I did not live here or it was CARB legal, I would get the SSV, that thing is so sweet.

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Old 10-14-2005, 05:51 PM   #9 (permalink)
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I have the 5/16" spacer and so far it is the best mod for the money i have bought.
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Old 10-16-2005, 12:26 AM   #10 (permalink)
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I thought the MD spacer was great when I got one last year. I helped install one today and the kit is even better now. I love what he has done with the pylon spacers.

I did discover that early 03 cars have smaller bolts on the strut bar. So there was one trip to the hardware store for those bolts, everything else was in the kit.

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