Notices
Engine Performance This section is for discussion on all engine building related questions.
Sponsored by:
Sponsored by: KPower

Because CNC

Thread Tools
 
Search this Thread
 
Old Aug 21, 2013 | 11:08 PM
  #41  
scenturion's Avatar
Junior Member
iTrader: (9)
 
Joined: Dec 2011
Posts: 408
Total Cats: 61
From: SFBay
Default

Only BP6D, not BP4W, correct?
Old Aug 22, 2013 | 12:47 AM
  #42  
emilio700's Avatar
Thread Starter
Supporting Vendor
iTrader: (3)
 
Joined: May 2005
Posts: 7,622
Total Cats: 2,619
Default

Originally Posted by k24madness
The part I have a hard time understanding is why spend all the effort and money and not give it the icing on the cake. The performance gains per dollar spend are far greater with the performance cams than the other work you have done here.
We offer a CC head with stock cams because it works, and will absolutely be a better choice for many builders than a CNC head with big cams will be. For other customers willing to pay more, and with different needs, we'll offer a DIFFERENT CNC design with big cams.

You disagree/don't understand.

That is as clear as I can get without sharing proprietary info.

/
__________________


www.facebook.com/SuperMiata

949RACING.COM Home of the 6UL wheel

.33 SNR
Old Aug 22, 2013 | 01:10 AM
  #43  
k24madness's Avatar
Senior Member
iTrader: (6)
 
Joined: Jun 2010
Posts: 1,421
Total Cats: 95
From: San Rafael, CA
Default

Originally Posted by emilio700
This is the digitized version of the port we won everything with in 2012.
Didn't your winning motor have custom cams in 2012 along with this port work?
Old Aug 22, 2013 | 01:12 AM
  #44  
emilio700's Avatar
Thread Starter
Supporting Vendor
iTrader: (3)
 
Joined: May 2005
Posts: 7,622
Total Cats: 2,619
Default

Originally Posted by k24madness
Did your winning motor not have custom cams in 2012?
I'm going to pretend that you are not here now.
__________________


www.facebook.com/SuperMiata

949RACING.COM Home of the 6UL wheel

.33 SNR
Reply
Leave a poscat -1 Leave a negcat
Old Aug 22, 2013 | 01:21 AM
  #45  
k24madness's Avatar
Senior Member
iTrader: (6)
 
Joined: Jun 2010
Posts: 1,421
Total Cats: 95
From: San Rafael, CA
Default

Originally Posted by emilio700
I'm going to pretend that you are not here now.
LOL.. OK Emilio.

I have a valid POV that you fail to acknowledge. I forgot that this forum is not about sharing technical information for everyone. I will move on and let you continue with your marketing efforts and not blur the lines with facts.
Old Aug 22, 2013 | 09:21 AM
  #46  
Leafy's Avatar
Elite Member
iTrader: (1)
 
Joined: Jun 2012
Posts: 9,491
Total Cats: 105
From: NH
Default

Originally Posted by k24madness
LOL.. OK Emilio.

I have a valid POV that you fail to acknowledge. I forgot that this forum is not about sharing technical information for everyone. I will move on and let you continue with your marketing efforts and not blur the lines with facts.
That response means two things: "Yes and you cant have any because I like winning." or "Yes, but they're very illegal so I cant admit it."

This head is cool, I like the price. I agree, higher lift cams with stock duration would be pretty sweet. But I also think that off the shelf cams are stupid. The biggest gain in a cam for this would be making the ramp angles more aggressive, more aggressive ramp angles make more power everywhere, make the car idle better, but your limit of aggressiveness is based on how long you want the valves and valve seats to last. So someone like me where a 10 hour motor would last like 5 seasons, I would be ok with having to refresh the head every 4 years, but for emillio who'd have to change a 10 hour motor 3 times during a race, it wouldnt work out so well.
Old Aug 22, 2013 | 09:44 AM
  #47  
NiklasFalk's Avatar
Senior Member
iTrader: (1)
 
Joined: Jun 2006
Posts: 1,391
Total Cats: 63
From: Sweden
Default

Don't forget that the customer base for a 10 hour head is much smaller and you risk selling it to those who don't "understand" what 10 hours mean (and then bitch about it failing).
Much safer to stock heads making the most of OEM cams/valve size/lifters.

Unlimited custom is (and has always been) available, but then you need to manage the project yourself.
Too big cams will not play well with a plenum anyway...
Old Aug 22, 2013 | 09:48 AM
  #48  
Erat's Avatar
Elite Member
iTrader: (5)
 
Joined: Oct 2011
Posts: 5,717
Total Cats: 830
From: Detroit (the part with no rules or laws)
Default

Maybe i haven't been following along with this thread good enough.

But where's the proof and data for this? Are we still waiting?
I read something about someones builder doesn't want to share information.
Old Aug 22, 2013 | 09:56 AM
  #49  
nitrodann's Avatar
Elite Member
 
Joined: Apr 2010
Posts: 2,826
Total Cats: 66
From: Newcastle, Australia
Default

I dont think we are getting any. Im just not happy about the seeming openness and then closed as soon as I mention cams.

Dann
Old Aug 22, 2013 | 10:45 AM
  #50  
miata2fast's Avatar
Elite Member
iTrader: (2)
 
Joined: Aug 2009
Posts: 3,145
Total Cats: 175
From: Dover, FL
Default

It is quite simple really. A ported head will make power everywhere in the power band, and you have the reliability and longevity that comes with running a stock camshaft.

Sure the motor will make much more power with the bigger cam, but that is an upgrade that can be done anytime when your budget allows and you hunger for more. It is kind of silly to do the opposite, changing the cam first and later doing port work. It is proper to do the cylinder head first.

Also, you should keep in mind that running a much bigger cam usually means that other areas of the powertrain will need to be addressed to take full advantage of the camshaft change. A good example would be gearing. When you think about it, having a ported head and continuing to run a small cam is not a bad idea after all, when you weigh the other costs associated with a higher rpm motor.
Old Aug 22, 2013 | 10:47 AM
  #51  
Leafy's Avatar
Elite Member
iTrader: (1)
 
Joined: Jun 2012
Posts: 9,491
Total Cats: 105
From: NH
Default

Originally Posted by miata2fast
It is quite simple really. A ported head will make power everywhere in the power band, and you have the reliability and longevity that comes with running a stock camshaft.

Sure the motor will make much more power with the bigger cam, but that is an upgrade that can be done anytime when your budget allows and you hunger for more. It is kind of silly to do the opposite, changing the cam first and later doing port work.

Also, you should keep in mind that running a much bigger cam usually means that other areas of the powertrain will need to be addressed to take full advantage of the camshaft change. A good example would be gearing. When you think about it, having a ported head and continuing to run a small cam is not a bad idea after all, when you weigh the other costs associated with a higher rpm motor.
Why do you need to change the gearing when the power band doesnt change? We're talking about a stock duration cam with more life and maybe more aggressive ramp angles, thats going to have the same powerhand as the stock cam but make more power, assuming your head flows well at the higher lifts.
Old Aug 22, 2013 | 10:52 AM
  #52  
miata2fast's Avatar
Elite Member
iTrader: (2)
 
Joined: Aug 2009
Posts: 3,145
Total Cats: 175
From: Dover, FL
Default

Originally Posted by Leafy
Why do you need to change the gearing when the power band doesnt change? We're talking about a stock duration cam with more life and maybe more aggressive ramp angles, thats going to have the same powerhand as the stock cam but make more power, assuming your head flows well at the higher lifts.
You maybe talking stockish duration, but I would not choose to do so. Also Emilo mentioned going to 7800 rpm. That is a powerband shift. I have mildly higher duration, and I will tell you that my powerband did shift some. It is something to take into consideration, and costs money and time.

Last edited by miata2fast; Aug 22, 2013 at 08:03 PM.
Old Aug 22, 2013 | 10:58 AM
  #53  
z31maniac's Avatar
Elite Member
 
Joined: Oct 2011
Posts: 3,693
Total Cats: 222
From: OKC, OK
Default

Originally Posted by Leafy
So someone like me where a 10 hour motor would last like 5 seasons, I would be ok with having to refresh the head every 4 years, but for emillio who'd have to change a 10 hour motor 3 times during a race, it wouldnt work out so well.
I suspect most, like myself, want the "100 hour motor" that is so often thrown around.

That's essentially 33-34 weekends for me of HPDE/TT, or 4-5 years worth. That would be an acceptable lifespan for me, and a 100 hour engine is what I see Emilio and Sav frequently talk about here.
Old Aug 22, 2013 | 11:25 AM
  #54  
cowboys647's Avatar
Junior Member
 
Joined: Oct 2009
Posts: 330
Total Cats: -3
From: Anderson, SC
Default

Originally Posted by emilio700
Yup. Flow and controlled A/B testing with a stock head. It'll be a month or two before that's published.
For people wondering when flow data will be here..
Old Aug 22, 2013 | 11:48 AM
  #55  
Scrappy Jack's Avatar
Elite Member
iTrader: (2)
 
Joined: Sep 2008
Posts: 2,799
Total Cats: 179
From: Central Florida
Post

Here, let me parse the thread down to a couple of bullet points for you people that cannot be bothered to re-read the first post or read the entirety of the thread (or even just the posts made by Emilio).

Originally Posted by emilio700
We're about 6 weeks away from having these BP6D and BP4W heads OTS and ready to ship.

Big flow and power gains. How much? We'll post that when testing is complete. We are doing controlled A/B testing with a fresh OEM rebuild and our CNC head on an otherwise stock JDM NB2 longblock with I/H/E and ECU.

Target price is $2750 exchange with stock solid lifters.

By the end of the year we should have our proprietary cams available for a stage 2 head with some additional features for about $4000.

Long blocks might follow in 2014.
Originally Posted by EO2K
Will flow numbers be forthcoming?
Originally Posted by emilio700
Yup. Flow and controlled A/B testing with a stock head. It'll be a month or two before that's published.
Old Aug 22, 2013 | 12:04 PM
  #56  
emilio700's Avatar
Thread Starter
Supporting Vendor
iTrader: (3)
 
Joined: May 2005
Posts: 7,622
Total Cats: 2,619
Default

The drift here is ridiculous.

Facts:

1. Customs cams make more power than stock cams.

2. Custom cams cost more.

3. Stock cams work just fine for many users.

4. We stated we would offer customs cams as an option in the OP


Am I missing something?
__________________


www.facebook.com/SuperMiata

949RACING.COM Home of the 6UL wheel

.33 SNR
Old Aug 22, 2013 | 12:08 PM
  #57  
18psi's Avatar
VladiTuned
iTrader: (76)
 
Joined: Apr 2008
Posts: 35,821
Total Cats: 3,482
Default

yeah: the part where you give away all the info on these for free so that everyone here can replicate it and beat you on the track as well as put you out of business.




Seriously though: I think most here are actually secretly wishing this.
Old Aug 22, 2013 | 12:23 PM
  #58  
EO2K's Avatar
Elite Member
iTrader: (37)
 
Joined: Apr 2010
Posts: 10,477
Total Cats: 1,924
From: Very NorCal
Default

No kidding. Between this and the 1.6 internals thread, it seems like MT decided today would be a good day to drop acid with their coffee.

Point me at another shop that is offering a developed OTS built head solution on exchange. DO IT!

/crickets

This head with stock cams is probably fine for 90% of us plebes. Hell, most of us will NEVER need it but will buy it anyway because its easy. We get the benefit of the development time Emilio & Co. have put into it and repeatability of the CNC process rather than trusting some jackhole with a die grinder hogging out ports. Other than the EP guys (who share NOTHING) who else is doing this kind of development work and making it available? The 10% who actually NEED more than this are the guys who actually have the budget for hand porting and flowbench work. This is obviously not for them. As a vendor, why lock yourself out of 90% of the market?

Last edited by EO2K; Aug 22, 2013 at 12:40 PM.
Old Aug 22, 2013 | 02:03 PM
  #59  
Scrappy Jack's Avatar
Elite Member
iTrader: (2)
 
Joined: Sep 2008
Posts: 2,799
Total Cats: 179
From: Central Florida
Talking

Originally Posted by emilio700
Am I missing something?

Just start answering any future questions by quoting yourself from earlier posts.
Old Aug 22, 2013 | 02:59 PM
  #60  
EErockMiata's Avatar
Senior Member
 
Joined: May 2011
Posts: 638
Total Cats: 76
Default

I always find it funny that on every car forum I'm on... people expect head work info to be given away for free. Sure I could see coming at a random person for more info and raw numbers/proof. But a vendor/racer/business and miata R&D shop? Why the hell would they give the info away? If you're smart enough to provide comment and suggestions... chances are you're smart enough to get a similar result yourself and you won't be a customer. If you are that smart and you're just lazy... stfu and get your wallet out.

I always find it ironic that the biggest **** talkers in threads like this... are the people that would pretty much never be customers of said product.



All times are GMT -4. The time now is 11:22 AM.