Header comparison RB, Maruha, Maxim
08-28-2014, 02:37 PM
#41
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Location: Lisbon, Portugal
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We're talking about headers. After the initial slight sound increase I'd imagine would happen from upgrading a stock unit to an after market header, I doubt you'll see any difference between aftermarket headers in terms of sound levels. You adjust sound with mufflers, not headers.
I have an RB muffler, and I need to buy a header. Hence I am here. In case it is not clear from previous posts, I only mentioned the fact that I already have a muffler, because leafy was mentioning the possibility of getting whatever muffler I wanted.
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08-29-2014, 12:55 PM
#48
On the flip side, we are still finding significant power gains from the air filter to the intake port. Our CNC ported head with +2 O/S exhaust valves is about the limit of what we can produce and offer in serial production. These days, we are playing around with cam designs for a future SuperMiata cam product line. Those cams will be very affordable be cause we are making our own cast and hardened blanks. That might be 2016, who knows.
When and if someone present compelling data that shows gains on the intake side for a typical I/H/E + ECU NB engine on pump gas, we will continue to recommend and offer exhaust parts what is know to be durable, cost effective, fit perfectly, look nice and of course, make power.
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08-30-2014, 12:50 PM
#49
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Join Date: May 2010
Location: Tampa, Florida
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^^^ Hopefully when your camshafts come out they'll slide right in without any expensive fancy under buckets.
Are you gonna make different profiles, 1 for low end torque and another for high revs output or is it just one profile?
Are you gonna make different profiles, 1 for low end torque and another for high revs output or is it just one profile?
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08-30-2014, 01:08 PM
#50
I don't know how thick shims you can get hold of (custom is always possible) and if thick shims increase the risk och spit-out (larger max cam radius certainly do). Heavy shims does not help the springs do their job either.
Of course there can be improvements within the restrictions of "bolt on" but there are so much more freedom going to a 33mm base circle and SUBs.
But Emilio might have cracked the nut of extracting a lot from nowhere once again.
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08-30-2014, 01:21 PM
#51
At least thats the idea now. Many months of R&D yet to do so we'll see.
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08-30-2014, 02:01 PM
#53
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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.
On the flip side, we are still finding significant power gains from the air filter to the intake port. Our CNC ported head with +2 O/S exhaust valves is about the limit of what we can produce and offer in serial production. These days, we are playing around with cam designs for a future SuperMiata cam product line. Those cams will be very affordable be cause we are making our own cast and hardened blanks. That might be 2016, who knows.
inexpensive cams sound like a dream...
When and if someone present compelling data that shows gains on the intake side for a typical I/H/E + ECU NB engine on pump gas, we will continue to recommend and offer exhaust parts what is know to be durable, cost effective, fit perfectly, look nice and of course, make power.
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08-30-2014, 02:17 PM
#55
Both bolt ons and fabricated bits. The typical DIY short ram cold side air intake cost the average person maybe $70 to build and is one of the most effective mods you can make. Either with a standalone running speed/density or extend the OEM harness and relocate the MAF. Square top is worth 6-10whp depending on the build and can be found for $400 if you hunt around a bit.
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08-30-2014, 02:29 PM
#56
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Both bolt ons and fabricated bits. The typical DIY short ram cold side air intake cost the average person maybe $70 to build and is one of the most effective mods you can make. Either with a standalone running speed/density or extend the OEM harness and relocate the MAF. Square top is worth 6-10whp depending on the build and can be found for $400 if you hunt around a bit.
But at least I got my square top for less than $100, because Europe :-)
EDIT: ok i did a little math of intake and exhaust side non-internal stuff. I understand now. I was guess I was distracted by the port/valve/cam discussion.
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