Voided76

Looking good highside, it'd be nice to have my wideband for the rapidbike there too.

All fiddling and speculation and likelyhood aside, How's the SoCal header doing?

Case in point. This is the '14 VFR with a Delk header. Stock muffler. picks up great in the midrange, and then the complete shit merges and collector design causes it to LOSE high rpm horsepower to even the stock header and it's T junction merges, if that tells you anything. I'd have no issues recommending a delk header except: it causes the VFR to completely fall on it's face after 9 grand. it's why I roll my eyes at delk headers, it's why I'm actually very very angry about the BW/Ali/Lextek headers. they're so close to nailing every aspect that it would've been likely cheaper, to run the 36-38mm ID primary the whole way. and make more power. but they didn't. It comes out of the header with the same squashed down ID as the stock '14 VFR, which you see here get LEFT in the midrange by even 98 spec primaries. Because that's what delk is running here, 32mm ID vs 30-29mm for the vtec era. They left (lots of) horsepower on the table. for what, so you could use the stock exhaust gaskets? So they could save 10-20 dollars a header instead of doing a decent set of merges and slip joints? lmfao goddamn these companies.

To address what you think about what I make of the lextek: The primaries make a big difference in the midrange to where the cross of HP/Torque happens. You can SEE the effect of enlarged primaries in Delkevic's own dyno results. a pretty decent midrange bump, and then the awful merges of it's POS 4-1 hodge podge cause a net loss of 5 hp or so on the topend. They used to have the dynosheets up, and they've since taken them down. lol. If you do a search around here you'll find them. I might have one, but I have to go to work. to be continued.

The lextek isn't that encouraging at all, TBH unless you're ready to buy a budget header than start hacking and mandrel bending it and re welding the first 8 inches of all 4 primary tubes. Pretty obvious that the multi-stage primary tomfoolery evident in the lextek/bw/alibaba header isn't working. I'd say it's in way better shape than any of the delk/black widow/sbs/motad crap headers, because for around 100 bucks at a legit speed shop they can be turned into something very much like what we're designing here. But again. as it sits it's yet another OEM replacement with a few perks until you chop it up. But at least it has that going for it. Proper primaries on these bikes pick up power just off idle. The graph you've provided is great testament that they got the merges right. it's 90% there but they fucked up the primaries. which is what I've been saying since I saw them/aquired some data through email about them. at the outlet of the head they're no different from Vtec/8th gen pipes. and it's why they aren't making More power until later more than likely. They pick up that immediate 3.5-4 ponies similarly but they don't do it from 3 grand on like the 35.5mm inners do.

Let. Me. Know. when you plan to do dyno stuff with the 8G. I have my stock, 3 different lengths of mufflers, a stock and a modded airbox with candyred's glued-and-sanded-smooth R6 velocity stacks installed, clean stock, and <500 mile pipercross filters, the RapidBike Racing module, with the "override back to stock for CARB compliance" module on standby along with a bluetooth kit and my own laptop with the rapid bike tuning software on it. we could do all sorts of different stages of tune. I'd even kick around the idea of whether or not changing the drivetrain gearing picks up measurable power. could pick up a stock 520, and +1 520 front to measure up to 9 rear teeth's worth of drive gear adjustment. I would adore being involved, but I need a few months of advance time so I can put in leave with the navy to spend the odd 2-4 days wrenching and dyno pulling if I had my way.

remember guys, just the tip.

SFD I have the money up front if need be. again. I got money, AND time, currently.

I'm in for the 8th. no questions asked. Also let wade know I have the modded airbox, rapid bike race with ignition timing/fuel control, pipercross air filter, short med. and long mufflers standing by for tuning once he gets the 8th header out. I could take some leave maybe if you guys need a bike. or if you had a VFR in trade for a week or two while fabbing. ^_^ Cause I daily drive the '14

after how many of my great effort / completely failed attempts at headers.

That's entirely possible. that sounds like them trying to extract extra monies THROUGH shipping charges. So, we'll see. they asked me to send them a 2014 header for reference if they were going to make me one. Ebay to the rescue. tossing some low-balls around to see if I can score a header for cheap, then drop ship it to wherever these guys are. lol If they see just how close '14 headers are to their own jigs I imagine they'd just fab up some '14 style front primaries and 8th genners would have a header worth spending money on.

They're all coming from the same shed. Every process is so extremely similar regardless of how they're crossing. Needless to say though now that I have an alibaba source I can get a header made at actual spec. or at least request it and see what they say. As in: Suggest to the actual manufacturer of these headers: aka, not lextek or BW. let's not mix that part up. to put the O2 sensors per bank, instead of stacked in the collector as if that would actually make useful data for the ECU. We'll see. I'll post them some things and see what they say. my experience with ali manufacturers for fairings has been pretty much stellar. I hope these guys are just as reasonable and flexible. As I keep reading, they also offer the header in titanium. Hmm.

"please add additional details and specifications"

https://message.alibaba.com/msgsend/draftPo.htm?spm=a2700.details.maonnacta.dorder.24056eeaTg7LJG&amp;productId=60684155091&amp;id_f=IDX12py7w2pdIxXHePTpPfiPgPCW9USkE8CWQnjD0LsJexWZchrvPrFJ_JHtYEStDmBZ&amp;mloca=po_en_detail&amp;tracelog=from_detail go ahead. click that. lol

I'm not sold on BW having gotten me the correct facts, as a matter of fact. I'm however sold on Alibaba, BW, and Lextek all having the same header. lol