1994 Mazda Miata, 1992 Mazda Miata Sold, 1995 Mazda Rx7 (500hp) Sold, 1999 Subaru GC8 (310hp) Sold
The only thing standing between you and your goal is the BS story you keep telling yourself as to why you can't achieve it. ― Jordan Belfort
The Daily Driven Warrior - A MSM Build Thread
I'd love to get a Mahura VP header some day. I'm quite happy, though, with my Fujitsubo 4-2-1 header.
I do recall asking Emilio what he thought of the Fujitsubo header and he said it's a good choice, but I don't think he told me about any Hp gains.
Maruha VP
Racing Beat 56006
BlitzWing (08-23-2014),etikoner (08-24-2014),kung fu jesus (08-23-2014),Pfunk (08-22-2014),Slampen (05-04-2015)
Even though I have the Maruha unit, it's great to see just how good the RB unit is, and for so much less.
kung fu jesus (08-23-2014)
I'd call it negligible to the point that a simple change in the weather could give you the same difference with the same parts. totally agree RB stuff is amazing if I had not gotten my Fujitsubo for for little I'd of gotten an RB header to match my RB exhaust.
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.
1999 NB8C, TWM ITB's, Adaptronics, Maruha VP Header, 264 / 264 Cams, 12.5:1, Advan RG II's, 4.77's, 185whp
1991 NA6C, Turbo, Flares, Tein Flex, MSPNP, 15x9 Work Equip 01's, 254whp @ 18psi
1993 FD3S, SP 13b, 60-1, Haltech, V-Mount, 99 Spec Aero, 417whp @ 16 psi
1993 FD3S, All Motor 20b build in the works
2006 SE3P, 13b Renesis, 9000 RPM Daily
2003 AP1, Built All Motor F20C, 232whp
2005 AP2, Amuse R1, F22C
2007 BMW Z4 ///M Coupe, Apex EC-7s, Bilstein PSS10s
93 and 94 Suburban K1500s
We did not get the chance to do that. It was EOD and we were rushed just to get it done once.
That was the major point of that header though? I guess that explains the afr and lack of tuning, pretty dead on for each other though.
Last edited by fwdtamiya; 08-30-2014 at 11:55 AM.
I always told everyone that USDM parts were higher quality than what you found in Japan.
People always assumed I was exaggerating. Which is why I never kept any of the Japanese parts on my car (except for the Maxim, the flex pipe is a feature I actually do desire... and my HKS because it's the best sounding exhaust in my opinion). I just kept selling them to people to make me money. Hahaha
1994 Mazda Miata, 1992 Mazda Miata Sold, 1995 Mazda Rx7 (500hp) Sold, 1999 Subaru GC8 (310hp) Sold