280ZX (S130) Forums Dedicated to 79-83 ZCars

testing mbc?

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Old Sep 25, 2008 | 01:48 PM
  #26  
snwbrderphat540's Avatar
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open dump ^^^^, and open dump is so sexy, its a beautiful sound and its not THAT loud.... though pretty loud, also if you ever get like a 2 step or anti lage setup you can watch the dump pipe just billow out flames towards the ground at night when it reaches full boost lol.
Old Sep 25, 2008 | 03:49 PM
  #27  
lifegrddude's Avatar
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From: San Diego
Originally Posted by Bleach
Is that external wastegate with open dump or is it that loud even if you pipe it back to the main exhaust further down?

Most times I've seen the external piped right back into the main exhaust flow.



It's with open dump. The guy who sold me the header with the flange attached, had welded it on facing the wrong way so there is no way for me to run a dump tube to the exhaust. You can probably hear my Z from a 1/2 mile away under WOT. It got some dude on one of those v-twin cruisers with a modded muffler to stop goosing his throttle next to me on the freeway.
Old Sep 26, 2008 | 12:15 PM
  #28  
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I love the Power Glove. It's so Bad.

Anyway so those injectors though will work with the stock plastic Nissan injector holders and O-rings? That's the main thing I was concerned about. I got the Pallnet rail for the stock type injectors, so I wanted whatever will fit directly in like stock and not have to get another rail. It sounds like for the most part you don't need to go that much larger. Unless you're running some serious HP. Right now I'm aiming for a good 250hp to start. That should hold me over for like a month. Maybe a week....a couple days....
Old Sep 26, 2008 | 12:29 PM
  #29  
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The ones I have direct experience with so far are the Ford SVO, the Benz 450SEL from JWT, and the current injectors on my Z, which I can't remember what vehicle they came from, but they flow 440cc. They all fit on a barbed fuel rail. The Supra injectors need an O-ring style, and I believe so do the DSM injectors.

The SVO is probably the best one to start with since they are 370cc and should flow enough to get you near the 280hp mark before you hit 80% duty cycle. The bigger the injectors, the worse your low speed and idle tend to get. My Z is prone to stalling if I push in the clutch while driving unless I let it engine brake for a second or two to reduce the fuel consumption.
Old Sep 26, 2008 | 03:54 PM
  #30  
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Looking through HybridZ people say the 90-94 Eclipse Injectors are 390cc so I figure I'll probably end up going with something like the 370 or 390cc. 400cc is quite a bit more than I'll need. I have to wonder though, using Nistune if that'd help alot more since you could then mess with the values to properly resize the injectors.

Man rockauto is fast! I ordered the 2 front rubber brake lines for my Z as well as the 6 injector connectors. All shipping from 2 different locations. I purchased it super early morning on the 24th, they got it shipped out and I'll have it tomorrow. The injector connectors supposedly had a 4 day delay. They e-mailed me to notify then on the 26th they shipped them out and sent me the tracking number.

Last edited by duowing; Sep 26, 2008 at 05:46 PM.
Old Oct 20, 2008 | 12:40 AM
  #31  
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I just put a bid in on a Greddy Profec B SpecII on ebay. Does anyone know anything about the Spec II? Any good, or not too good?
Old Oct 20, 2008 | 06:11 AM
  #32  
NismoPick's Avatar
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From: Wild Wild West, UTAH!
Here's a review on it: http://www.subarureview.com/showreview.php?id=1079
Old Oct 20, 2008 | 09:27 AM
  #33  
snwbrderphat540's Avatar
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harder to use and i think supports less boost.... other than that good. thatas from personal experience BTW
Old Oct 20, 2008 | 10:18 AM
  #34  
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Just as with everything good and bad reviews. I figure I'll give it a try and see how it works. I really hate this MBC for the fact that I'll hit about 10.6 psi when I punch the throttle then it gradually bleeds off to 9 or 8.8 if not less. It'd be nice to have something that will maintain the boost.
Old Oct 20, 2008 | 02:43 PM
  #35  
duowing's Avatar
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Well I ended up winning the Profec B-Spec II on ebay, so we'll see how it goes. As long as it holds boost, provides a way to change the boost from inside the cabin, and doesn't bleed off, I think I'll be happy.
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