Header comparison RB, Maruha, Maxim
09-03-2014, 07:57 PM
#62
No, it isn't.
Since you're new here, I'll be nice.
Bottom line seems to be to buy the RB header...
(That's me, paraphrasing about a year worth of header threads/etc/along with SEARCH RESULTS since owning a Miata.)
While the JR is CARB legal, pretty sure I wouldn't want to dirty my hands to install one.
And, ya know... try searching
Since you're new here, I'll be nice.
Bottom line seems to be to buy the RB header...
(That's me, paraphrasing about a year worth of header threads/etc/along with SEARCH RESULTS since owning a Miata.)
While the JR is CARB legal, pretty sure I wouldn't want to dirty my hands to install one.
And, ya know... try searching
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09-04-2014, 04:11 AM
#63
No one post by one person. My personal experience is that we have tried all sort of stuff on the exhaust side and found that a OTS Racing Beat header, race pipe (test pipe), midpipe and single tip exhaust flow about as much as a $2500 hand built bundle of snakes work of art header/exhaust. For fun, we tried a straight pipe. Yep, made less power than the OTS RB exhaust. While a one off Stahl or Boig big tube header for a 9000rpm 14:1 EP motor that idles at 2000rpm will likely be more effective that the OTS RB system on that example, everything else we have tried has come up with no real gains. This from a bone stock 102whp NA8 to a 400whp supercharged car and most points in between.
Last edited by k24madness; 09-06-2014 at 07:22 PM.
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09-04-2014, 11:44 PM
#64
Emilio,
Did you do any testing without the venturi fitted in the Maruha? It seems to work well on a stock engine, but I wonder if it chokes things up on a more modified engine with compression, cams, ITB's, etc. I was going to pull mine out and maybe re-dyno. Curious as to what your thoughts are.
Did you do any testing without the venturi fitted in the Maruha? It seems to work well on a stock engine, but I wonder if it chokes things up on a more modified engine with compression, cams, ITB's, etc. I was going to pull mine out and maybe re-dyno. Curious as to what your thoughts are.
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09-04-2014, 11:50 PM
#65
Emilio,
Did you do any testing without the venturi fitted in the Maruha? It seems to work well on a stock engine, but I wonder if it chokes things up on a more modified engine with compression, cams, ITB's, etc. I was going to pull mine out and maybe re-dyno. Curious as to what your thoughts are.
Did you do any testing without the venturi fitted in the Maruha? It seems to work well on a stock engine, but I wonder if it chokes things up on a more modified engine with compression, cams, ITB's, etc. I was going to pull mine out and maybe re-dyno. Curious as to what your thoughts are.
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09-05-2014, 11:25 AM
#66
Blue Line: Stock 02 Block, Stock BP4W Head, MSM Intake Cam, TWM ITB's, Maxim Work's header, 2.378" ID Exhaust
Green Line: Stock 02 block, .060" Shaved BP4W Head, SUB's, Maruha 264' 10mm lift cams, Supertech Valvetrain, Toda Cam Gears, TWM ITB's, Maruha Header, 2.378" ID Exhaust, Aluminum Water Pump and Alternator Pulleys
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09-15-2014, 01:12 PM
#75
Separately, we already know properly designed and implemented venturis have proven to work in other engines for decades. Good venturis are not cheap to make. My conclusion is that the RB might benefit by adding a venturi. So that's what we're trying next.
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09-15-2014, 06:47 PM
#76
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Location: Tampa, Florida
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^^^ If you guys can come up with a venturi system that adds a proven 5 whp and 5 ft-lbs of torque to the Racing Beat header that would be freaking awesome.
You all can then turn around and sell that RB header for $600 instead of $439. I would be willing to pay the extra $$$, go for it.
You all can then turn around and sell that RB header for $600 instead of $439. I would be willing to pay the extra $$$, go for it.
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09-15-2014, 06:51 PM
#77
I'm not sure what 949's plan is exactly for this setup. But my way of doing it would involve cutting the primaries off where they enter the stock collector then welding in a new collector with a proper merge and megaphone. Material alone would increase the cost of the header by about $350.
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09-16-2014, 08:27 AM
#78
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Join Date: Oct 2011
Location: Lisbon, Portugal
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That would be one (erroneous) conclusion. Two different header designs so not A/B test. The safe conclusion would be that RB's 4:1 config, pipe diameters and primary length are perhaps a better combo that the Maruha/Maxim/Fujitsubo et.al. All of the EP headers I've seen are 4:1.
Separately, we already know properly designed and implemented venturis have proven to work in other engines for decades. Good venturis are not cheap to make. My conclusion is that the RB might benefit by adding a venturi. So that's what we're trying next.
Separately, we already know properly designed and implemented venturis have proven to work in other engines for decades. Good venturis are not cheap to make. My conclusion is that the RB might benefit by adding a venturi. So that's what we're trying next.
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