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

2.0L BP4W 182whp

Old 02-11-2012, 07:23 PM
  #61  
Elite Member
iTrader: (24)
 
UrbanSoot's Avatar
 
Join Date: Jun 2007
Location: Woodland Hills, CA
Posts: 4,667
Total Cats: 18
Default

This actually looks very similar to the 2.0L BP non-stroker I built a while back... I used 11.5:1 85.5 pistons in my build though.
UrbanSoot is offline  
Old 02-11-2012, 09:06 PM
  #62  
Former Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 15,442
Total Cats: 2,099
Default

Originally Posted by UrbanSoot
This actually looks very similar to the 2.0L BP non-stroker I built a while back... I used 11.5:1 85.5 pistons in my build though.
I disassembled your motor and sonic checked it - it would have punched a hole in #3 in short order. Who built that engine?
Savington is offline  
Old 02-12-2012, 02:04 AM
  #63  
Supporting Vendor
Thread Starter
iTrader: (3)
 
emilio700's Avatar
 
Join Date: May 2005
Posts: 7,322
Total Cats: 2,369
Default




Attached Thumbnails 2.0L BP4W 182whp-supermiata_beta1.jpg   2.0L BP4W 182whp-supermiata_beta2.jpg   2.0L BP4W 182whp-supermiata_beta2.jpg   2.0L BP4W 182whp-supermiata_beta1.jpg  
__________________


www.facebook.com/SuperMiata

949RACING.COM Home of the 6UL wheel

.31 SNR

Last edited by emilio700; 02-12-2012 at 03:32 AM.
emilio700 is offline  
Old 02-12-2012, 02:08 AM
  #64  
Senior Member
iTrader: (18)
 
dstn2bdoa's Avatar
 
Join Date: May 2008
Location: Big Bear Ca
Posts: 988
Total Cats: 8
Default

I'll answer that for Urban. Dave at Builtmore in Los Angeles built it. His shop "specalized" in subaru's. I had to get mildly aggressive with him to get my stuff back from him. I started a thread on NASIOC trying to resolve it peacefully, and a guy from his home town posted up a bleak portrayal of his honesty, which I'll second.
/hijack
dstn2bdoa is offline  
Old 02-12-2012, 02:11 AM
  #65  
Senior Member
iTrader: (18)
 
dstn2bdoa's Avatar
 
Join Date: May 2008
Location: Big Bear Ca
Posts: 988
Total Cats: 8
Default

If anyone wants some 11.5:1 85.5mm supertechs pm me
//hijack
dstn2bdoa is offline  
Old 02-12-2012, 07:45 AM
  #66  
Junior Member
iTrader: (2)
 
glade's Avatar
 
Join Date: Apr 2010
Location: albion, mi
Posts: 319
Total Cats: 17
Default

That looks fun as shiat!
glade is offline  
Old 02-12-2012, 01:06 PM
  #67  
Elite Member
 
JasonC SBB's Avatar
 
Join Date: Jul 2005
Posts: 6,420
Total Cats: 84
Default

Originally Posted by hustler
I'm not so sure a 200hp NA car makes less heat than a 200whp turbo car.
1) Intercooler reduces airflow to radiator

2) Thick walls on turbo manifold conduct heat back into head - not sure how much effect overall this has on engine temps tho
JasonC SBB is offline  
Old 02-12-2012, 01:07 PM
  #68  
Elite Member
 
JasonC SBB's Avatar
 
Join Date: Jul 2005
Posts: 6,420
Total Cats: 84
Default

Originally Posted by emilio700
Good Miata cams aren't cheap. Get used to that if you want big n/a power
I sent my 97 M3 cams to www.elgincams.com and he custom ground them for not much money (IIRC ~$350). 4-cylinder miata cams should be cheaper.
JasonC SBB is offline  
Old 02-12-2012, 01:08 PM
  #69  
Elite Member
 
JasonC SBB's Avatar
 
Join Date: Jul 2005
Posts: 6,420
Total Cats: 84
Default

Originally Posted by 18psi
Oh how Id love to see this thing mated to a borg on e85.
Also, and this may be a dumb question, but: what is the big dip in hp/tq at 3800ish?
The same dip at 3250 for stock cams. It's at half of the power peak RPM. That it's at 3700 tells you the cams/IM are tuned for higher RPMs.
JasonC SBB is offline  
Old 02-12-2012, 07:53 PM
  #70  
Tour de Franzia
iTrader: (6)
 
hustler's Avatar
 
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,085
Total Cats: 375
Default

You are doing the exact opposite of what my critics are telling me to do with the steering wheel. What gives?
hustler is offline  
Old 02-12-2012, 08:03 PM
  #71  
Senior Member
iTrader: (2)
 
dc2696's Avatar
 
Join Date: May 2005
Location: Edmonton Ab, Canada
Posts: 1,202
Total Cats: 21
Default

Originally Posted by hustler
You are doing the exact opposite of what my critics are telling me to do with the steering wheel. What gives?
Hooking thumbs in?
dc2696 is offline  
Old 02-12-2012, 08:16 PM
  #72  
Supporting Vendor
Thread Starter
iTrader: (3)
 
emilio700's Avatar
 
Join Date: May 2005
Posts: 7,322
Total Cats: 2,369
Default

Originally Posted by hustler
You are doing the exact opposite of what my critics are telling me to do with the steering wheel. What gives?
What, pray tell?
__________________


www.facebook.com/SuperMiata

949RACING.COM Home of the 6UL wheel

.31 SNR
emilio700 is offline  
Old 02-12-2012, 09:26 PM
  #73  
Tour de Franzia
iTrader: (6)
 
hustler's Avatar
 
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,085
Total Cats: 375
Default

Originally Posted by emilio700
What, pray tell?
The tell me one steering-input, "be smooth", and blah blah blah. I'd rather listen to you than just about anyone else.
hustler is offline  
Old 02-12-2012, 09:43 PM
  #74  
Senior Member
iTrader: (2)
 
dc2696's Avatar
 
Join Date: May 2005
Location: Edmonton Ab, Canada
Posts: 1,202
Total Cats: 21
Default

Originally Posted by hustler
The tell me one steering-input, "be smooth", and blah blah blah. I'd rather listen to you than just about anyone else.
Look how slow he's moving the wheel, no real huge jerks, smooth as she gets I'd say.
dc2696 is offline  
Old 02-12-2012, 09:45 PM
  #75  
Supporting Vendor
Thread Starter
iTrader: (3)
 
emilio700's Avatar
 
Join Date: May 2005
Posts: 7,322
Total Cats: 2,369
Default

Originally Posted by hustler
The tell me one steering-input, "be smooth", and blah blah blah. I'd rather listen to you than just about anyone else.
To stay in PTC, I had to remove the bump steer shims we ran in PTD. That makes the wheel jump around more over bumps. Necessary evil to get the ride height we want. If you look at the net steering input for most turns, minus bump steer kick back and corrections for slides, it is fairly slow. Transitions from left to right in esses but that's to be expected.

I don't focus, or even think about any particular steering method. I just try to give the car the input that it wants. If the car turns in well, only a little steering input is needed with a fast entry and a whisker of trail braking. That should translate to the needed steering angle for the mean arc you are describing through the turn. That is what they mean about one input. Some drivers will go in too slow and deep, then over brake and dial in a bunch of steering to get the car pointed towards the apex. The harder they go in and more abruptly they release the brakes, the more the car gets upset and requires a quick opposite lock correction right at turn in. This just kills speed in a Miata.

You have posted videos here before but I don't know where to look. Link to post so I can see what you're doing.

edit:
The car was not completely dialed. New spring rates, alignment, spoiler, pad compounds, splitter, wing, tires on their last legs. Car was close but not balanced exactly the way I like so I was perhaps making more corrections than usual.
__________________


www.facebook.com/SuperMiata

949RACING.COM Home of the 6UL wheel

.31 SNR
emilio700 is offline  
Old 02-12-2012, 11:06 PM
  #76  
Elite Member
 
doward's Avatar
 
Join Date: Feb 2007
Location: Columbus, OH
Posts: 1,531
Total Cats: 739
Default

So is the OGK NA chassis done for?

This car looks fantastic. Paving the way.
doward is offline  
Old 02-12-2012, 11:17 PM
  #77  
Tour de Franzia
iTrader: (6)
 
hustler's Avatar
 
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,085
Total Cats: 375
Default

Originally Posted by emilio700
To stay in PTC, I had to remove the bump steer shims we ran in PTD. That makes the wheel jump around more over bumps. Necessary evil to get the ride height we want. If you look at the net steering input for most turns, minus bump steer kick back and corrections for slides, it is fairly slow. Transitions from left to right in esses but that's to be expected.

I don't focus, or even think about any particular steering method. I just try to give the car the input that it wants. If the car turns in well, only a little steering input is needed with a fast entry and a whisker of trail braking. That should translate to the needed steering angle for the mean arc you are describing through the turn. That is what they mean about one input. Some drivers will go in too slow and deep, then over brake and dial in a bunch of steering to get the car pointed towards the apex. The harder they go in and more abruptly they release the brakes, the more the car gets upset and requires a quick opposite lock correction right at turn in. This just kills speed in a Miata.

You have posted videos here before but I don't know where to look. Link to post so I can see what you're doing.

edit:
The car was not completely dialed. New spring rates, alignment, spoiler, pad compounds, splitter, wing, tires on their last legs. Car was close but not balanced exactly the way I like so I was perhaps making more corrections than usual.

I know I need to "turn-in once" rather than chop-down on steering-angle. I'm on very old tires here too. Rip it apart please, have fun.
hustler is offline  
Old 02-13-2012, 12:26 AM
  #78  
Junior Member
iTrader: (1)
 
bellwilliam's Avatar
 
Join Date: Aug 2007
Posts: 384
Total Cats: 12
Default

Hustler watching your video, I have a suggestion.

don't hook your thumb around the steering wheel. if you w2w, have a contact. it could break your thumb. It has happened to someone I know pretty well.
bellwilliam is offline  
Old 02-13-2012, 12:33 AM
  #79  
Tour de Franzia
iTrader: (6)
 
hustler's Avatar
 
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,085
Total Cats: 375
Default

Originally Posted by bellwilliam
Hustler watching your video, I have a suggestion.

don't hook your thumb around the steering wheel. if you w2w, have a contact. it could break your thumb. It has happened to someone I know pretty well.
I'm aware after watching this video, I also grip the wheel way too hard. I started hooking my thumbs because I am so weak in my teres major/minor, infraspinitus fascia, and serratus posterior. I do not have the strength to turn the wheel for a session without hooking my thumbs. I'm spending an additional day in the gym every week solely working one these muscle groups for next month. I've spent the past six months really trying to get stronger.

Thanks for the advice.
hustler is offline  
Old 02-13-2012, 12:37 AM
  #80  
Senior Member
iTrader: (5)
 
bikersam717's Avatar
 
Join Date: Jul 2011
Location: Sonora, Ca
Posts: 618
Total Cats: 74
Default

Originally Posted by hustler
I'm aware after watching this video, I also grip the wheel way too hard. I started hooking my thumbs because I am so weak in my teres major/minor, infraspinitus fascia, and serratus posterior. I do not have the strength to turn the wheel for a session without hooking my thumbs. I'm spending an additional day in the gym every week solely working one these muscle groups for next month. I've spent the past six months really trying to get stronger.

Thanks for the advice.
bikersam717 is offline  

Thread Tools
Search this Thread
Quick Reply: 2.0L BP4W 182whp



All times are GMT -4. The time now is 08:10 PM.