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

Engine building ideas

 
Old 08-29-2018, 02:04 PM
  #21  
Senior Member
iTrader: (4)
 
Join Date: Jul 2009
Location: Morrison, CO
Posts: 592
Total Cats: 67
Default

This is a very helpful and very detailed list, thank you for putting it together.

Emilio, could you give me your recommendation on valves for my new head? I picked up a stock VVT head with 160k. I am torn whether to do a stock rebuild with multi-angle job or to go for oversized valves. I'm not sure if the valves are worth the $$$ for me. The car is a weekend, sunny-day driver and doesn't see track time and 7200rpm redline. Forged bottom end, ARP studs, etc. Plans are to make less than 300hp, likely in the 270 range. What will valves do for me in terms of spool and how many more PSI would I need to make the same power bump as oversize valves would give? Just blew up another Churbo and looking heavily at a TSE EFR right now.
vitamin j is offline  
Old 08-29-2018, 02:11 PM
  #22  
Supporting Vendor
Thread Starter
iTrader: (3)
 
emilio700's Avatar
 
Join Date: May 2005
Posts: 6,029
Total Cats: 1,745
Default

Originally Posted by vitamin j View Post
This is a very helpful and very detailed list, thank you for putting it together.

Emilio, could you give me your recommendation on valves for my new head? I picked up a stock VVT head with 160k. I am torn whether to do a stock rebuild with multi-angle job or to go for oversized valves. I'm not sure if the valves are worth the $$$ for me. The car is a weekend, sunny-day driver and doesn't see track time and 7200rpm redline. Forged bottom end, ARP studs, etc. Plans are to make less than 300hp, likely in the 270 range. What will valves do for me in terms of spool and how many more PSI would I need to make the same power bump as oversize valves would give? Just blew up another Churbo and looking heavily at a TSE EFR right now.
You are making it more complicated that it is. Valves cost more and make a bit more power. If they are in your budget, add them. If they are not in your budget, do not add them.

If you can add boost, then add boost. The equivalency is irrelevant.
__________________


www.facebook.com/SuperMiata

949RACING.COM Home of the 6UL wheel

.27 SNR
emilio700 is offline  
Old 08-29-2018, 02:12 PM
  #23  
Ich verstehe nur Bahnhof
iTrader: (4)
 
psyber_0ptix's Avatar
 
Join Date: Mar 2012
Location: Northern VA
Posts: 4,469
Total Cats: 487
Default

Didn't Soviet make 450hp on a bone stock head?
psyber_0ptix is offline  
Old 08-29-2018, 02:32 PM
  #24  
Senior Member
iTrader: (4)
 
Join Date: Jul 2009
Location: Morrison, CO
Posts: 592
Total Cats: 67
Default

Simple enough, thank you!
vitamin j is offline  
Old 08-29-2018, 04:39 PM
  #25  
Elite Member
iTrader: (6)
 
Join Date: Feb 2013
Location: Staunton, Va
Posts: 3,136
Total Cats: 384
Default

Originally Posted by vitamin j View Post
I picked up a stock VVT head with 160k. I am torn whether to do a stock rebuild with multi-angle job or to go for oversized valves. .
Be careful with the multi angle. While retaining stock valve seat width, there is not a lot of room to add a third angle. At least that was how my machine shop felt. I did end up with 3rd, but not much.
ryansmoneypit is offline  
Old 01-25-2019, 12:14 PM
  #26  
Junior Member
 
rrjwilson's Avatar
 
Join Date: Aug 2008
Posts: 342
Total Cats: 0
Default

Out of curiousity if BP6D engines do not have bearings from ACL what bearings do people use?
Also is the NBFL a different engine from the BP6D in the NB?

I ask because I've been paid and a NBFL SVT engine has popped up which could be Phoebe's backup heart.
rrjwilson is offline  
Old 01-25-2019, 12:19 PM
  #27  
Supporting Vendor
Thread Starter
iTrader: (3)
 
emilio700's Avatar
 
Join Date: May 2005
Posts: 6,029
Total Cats: 1,745
Default

You read that wrong. ACL does not offer thrust bearings for the NB2. The rest of the engine bearings are the same for all Miata BP's.

No USDM car with NBFL chassis or engine code. Perhaps someone from Europe can answer that question in a new thread.
__________________


www.facebook.com/SuperMiata

949RACING.COM Home of the 6UL wheel

.27 SNR
emilio700 is offline  
Reply
Leave a poscat -1 Leave a negcat
Old 01-25-2019, 12:21 PM
  #28  
Elite Member
iTrader: (3)
 
concealer404's Avatar
 
Join Date: Aug 2011
Posts: 10,188
Total Cats: 1,582
Default

What thrust bearings do people use in VVT motors?
concealer404 is offline  
Old 01-25-2019, 12:36 PM
  #29  
Elite Member
iTrader: (8)
 
bahurd's Avatar
 
Join Date: Apr 2013
Posts: 2,564
Total Cats: 252
Default

Originally Posted by concealer404 View Post
What thrust bearings do people use in VVT motors?
OEM VVT and MSM (from Jim Ellis site.)

ZJY111SK0 ------- (Oversize 0.25)
B6Y211SKY ------ (Oversize 0.75)
ZJY111SJ0 ------ (STD

Also, another place to get them: Mazda OEM Miata Thrust Bearing Set although they don't list the same part numbers.

Last edited by bahurd; 01-25-2019 at 12:58 PM.
bahurd is offline  
Old 01-25-2019, 12:39 PM
  #30  
Supporting Vendor
Thread Starter
iTrader: (3)
 
emilio700's Avatar
 
Join Date: May 2005
Posts: 6,029
Total Cats: 1,745
Default

Yah, OEM here.
__________________


www.facebook.com/SuperMiata

949RACING.COM Home of the 6UL wheel

.27 SNR
emilio700 is offline  
Old 01-25-2019, 12:40 PM
  #31  
Elite Member
iTrader: (3)
 
concealer404's Avatar
 
Join Date: Aug 2011
Posts: 10,188
Total Cats: 1,582
Default

^There you go RJ.

Also: NBFL = NB Face Lift.

RJ, all USDM 01-05 NBs have the BP6D motor that "we" usually call a "vvt motor" or "nb2 motor." "We" did not get any form of 1.6 in a Miata past 1993.
concealer404 is offline  
Old 02-18-2019, 11:00 AM
  #32  
Junior Member
 
rrjwilson's Avatar
 
Join Date: Aug 2008
Posts: 342
Total Cats: 0
Default

Thank you for the clarification all.

I will purchase appropriately although I do have one final question.
What is the dry mass of the BP6D engine give or take? stands are rated and so i don't want to mount it then the stand give way.
rrjwilson is offline  
Old 02-18-2019, 11:06 AM
  #33  
Elite Member
iTrader: (3)
 
concealer404's Avatar
 
Join Date: Aug 2011
Posts: 10,188
Total Cats: 1,582
Default

I don't think i've seen an engine stand rated for less than 500lbs, which is well more than any variant of BP.
concealer404 is offline  
Old 02-18-2019, 11:07 AM
  #34  
Senior Member
 
matrussell122's Avatar
 
Join Date: Sep 2016
Location: Seattle
Posts: 1,208
Total Cats: 183
Default

No much i took mine in out out of my truck by hand. If i had to guess i would say 200ish lbs
matrussell122 is offline  
Old 02-18-2019, 11:35 AM
  #35  
Supporting Vendor
Thread Starter
iTrader: (3)
 
emilio700's Avatar
 
Join Date: May 2005
Posts: 6,029
Total Cats: 1,745
Default

Originally Posted by rrjwilson View Post
Thank you for the clarification all.

I will purchase appropriately although I do have one final question.
What is the dry mass of the BP6D engine give or take? stands are rated and so i don't want to mount it then the stand give way.
It's an interesting question and also one that's commonly asked. But completely off topic. Your project sounds interesting. I would suggest starting a new thread for it.
__________________


www.facebook.com/SuperMiata

949RACING.COM Home of the 6UL wheel

.27 SNR
emilio700 is offline  
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Frank_and_Beans
Supercharger Discussion
13
09-12-2016 08:17 PM
FrankB
Miata parts for sale/trade
6
09-30-2015 11:48 AM
zephyrusaurai
Meet and Greet
2
09-28-2015 10:59 PM
ScrapinMX5
Meet and Greet
8
09-28-2015 01:04 PM


Thread Tools
Search this Thread
Quick Reply: Engine building ideas


Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.