Crusher - Page 17 - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Race Prep Miata race-only chat.
Sponsored by:
Sponsored by:

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 09-02-2013, 10:35 PM   #321
Elite Member
iTrader: (5)
 
Join Date: Dec 2010
Location: Raleigh, NC
Posts: 1,970
Total Cats: 49
Default

Emilio, is that coroplast you are using on the ITBs? Is that for heat-shielding or something else?
Seefo is offline   Reply With Quote
Old 09-02-2013, 11:01 PM   #322
Senior Member
iTrader: (4)
 
mr_hyde's Avatar
 
Join Date: Jul 2009
Location: Seattle
Posts: 799
Total Cats: 25
Default

Quote:
Originally Posted by Track View Post
Emilio, is that coroplast you are using on the ITBs? Is that for heat-shielding or something else?
Emilio is in the middle of final prep and loading but I watched the creation being cut:

The ITBs (or IAT) were heat soaking pretty bad so Emilio made this up in about 5 minutes. It's a basic heat shield to keep some of the radiator and engine heat off the plenum dome. The Coroplast will self clearance under the hood, is light and is easy to work with.
mr_hyde is offline   Reply With Quote
Old 09-02-2013, 11:58 PM   #323
Elite Member
iTrader: (5)
 
Join Date: Dec 2010
Location: Raleigh, NC
Posts: 1,970
Total Cats: 49
Default

Quote:
Originally Posted by mr_hyde View Post
Emilio is in the middle of final prep and loading but I watched the creation being cut:

The ITBs (or IAT) were heat soaking pretty bad so Emilio made this up in about 5 minutes. It's a basic heat shield to keep some of the radiator and engine heat off the plenum dome. The Coroplast will self clearance under the hood, is light and is easy to work with.
Thanks for sharing, I have used it on a few occasions previously.
Seefo is offline   Reply With Quote
Old 09-03-2013, 02:44 AM   #324
Supporting Vendor
Thread Starter
iTrader: (3)
 
emilio700's Avatar
 
Join Date: May 2005
Posts: 5,308
Total Cats: 1,326
Default

Late night tuning session at Advanced Engine Dynamix in Orange.

Same bottom end and ITB's as before. Swapped SuperMiata CNC BP6D head with .395 cam for SuperMiata CNC BP4W head with .427 cam. Made 5-15 more whp pretty much everywhere. Played with intake cam gear a bit. Getting a little spark scatter so we're going to put a stock valve cover back on. The cut up one lets the CAS shake around like mad. Running the stock 4T because we ran out of time. Really needs a 12+1T so we can ditch the CAS altogether.

So yeah, 190whp on 10.4:1 and 1861cc. Pretty happy with that. 85.5's and 12.0:1 with better ignition precision would get that over 200whp. Maybe after nationals.

Attached Thumbnails
Crusher-crusher_0903213_itb_bp4w_e85.jpg  
emilio700 is offline   Reply With Quote
Old 09-03-2013, 02:58 AM   #325
Junior Member
 
Join Date: Sep 2008
Posts: 62
Total Cats: 1
Default

Thats actually a 190whp ~1.8l Miata. All motor ~80whp increase from stock. I'm impressed.
arildh is offline   Reply With Quote
Old 09-03-2013, 03:39 AM   #326
Senior Member
iTrader: (3)
 
Join Date: Dec 2008
Location: KY
Posts: 698
Total Cats: 48
Default

Want.
jpreston is offline   Reply With Quote
Old 09-03-2013, 09:55 AM   #327
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,809
Total Cats: 1,780
Default

Quote:
Square top vs ITB's: Note how the numeric hp gained up top is slightly less than the losses down low with the ITB's. This is to be expected for ITB's vs a single throttle manifiold (STB). Overall though, the power area is greater with the ITB's, just shifted up about 500rpm.
is that small bump up top worth the 25-30rwtq loss at ~4K?
Braineack is offline   Reply With Quote
Old 09-03-2013, 10:58 AM   #328
Supporting Vendor
Thread Starter
iTrader: (3)
 
emilio700's Avatar
 
Join Date: May 2005
Posts: 5,308
Total Cats: 1,326
Default

Quote:
Originally Posted by Braineack View Post
is that small bump up top worth the 25-30rwtq loss at ~4K?
Read the earlier post understand why. Basically, gearing on track never puts me below 5000rpm.
emilio700 is offline   Reply With Quote
Old 09-03-2013, 11:01 AM   #329
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,809
Total Cats: 1,780
Default

fair enough. i stopped reading when i saw all the pretty pictures
Braineack is offline   Reply With Quote
Old 09-03-2013, 11:14 AM   #330
y8s
2 Props,3 Dildos,& 1 Cat
iTrader: (8)
 
y8s's Avatar
 
Join Date: Jun 2005
Location: Fake Virginia
Posts: 19,037
Total Cats: 406
Default

I wonder how much tuning the ITB trumpet lengths would massage the torque shape.

Not that you care since you're hanging out in 8k land.
y8s is offline   Reply With Quote
Old 09-03-2013, 11:29 AM   #331
Senior Member
iTrader: (1)
 
Join Date: Jun 2006
Location: Sweden
Posts: 1,391
Total Cats: 58
Default

Quote:
Originally Posted by y8s View Post
I wonder how much tuning the ITB trumpet lengths would massage the torque shape.

Not that you care since you're hanging out in 8k land.
It's just one of many parameters to get wrong.

Inspiring power curve , I have "some" dyno work to do...

Duration of the cams (understand if you want to keep that info)?
NiklasFalk is offline   Reply With Quote
Old 09-03-2013, 12:03 PM   #332
Supporting Vendor
Thread Starter
iTrader: (3)
 
emilio700's Avatar
 
Join Date: May 2005
Posts: 5,308
Total Cats: 1,326
Default

Runner length has been rough tuned. It's within about 15mm of optimum now.
When we come back from nationals we'll play with that a bit more.

Cam specs:

Current 190whp plot
BP4W - Integral
In 274 seat, .427 cam lift .014 lash (hot)
Ex 266 seat, .410 cam lift .014 lash (hot)

Previous 183whp plot
BP6D - Integral
In 266 seat, .395 cam lift .014 lash (hot)
Ex 263 seat, .385 cam lift .014 lash (hot)
emilio700 is offline   Reply With Quote
Old 09-03-2013, 03:51 PM   #333
Junior Member
 
Join Date: Mar 2010
Location: Durham, NC
Posts: 406
Total Cats: 19
Default

Can you share who you're getting blanks for VVT heads from? or are you having stock cams welded up?

Awesome numbers btw and good luck in Utah.
FatKao is offline   Reply With Quote
Old 09-03-2013, 05:25 PM   #334
Supporting Vendor
Thread Starter
iTrader: (3)
 
emilio700's Avatar
 
Join Date: May 2005
Posts: 5,308
Total Cats: 1,326
Default

Quote:
Originally Posted by FatKao View Post
Can you share who you're getting blanks for VVT heads from? or are you having stock cams welded up?

Awesome numbers btw and good luck in Utah.
we will offer blanks on our website Q1/14
emilio700 is offline   Reply With Quote
Old 09-03-2013, 09:39 PM   #335
Senior Member
 
Join Date: Sep 2013
Posts: 903
Total Cats: 59
Default

Attached Thumbnails
Crusher-udsx2yk.png  
Dunning Kruger Affect is offline   Reply With Quote
Old 09-03-2013, 10:10 PM   #336
Elite Member
iTrader: (1)
 
Join Date: May 2009
Location: Jacksonville, FL
Posts: 4,682
Total Cats: 216
Default

That thing is begging for compression, especially on E85. Or are you trying to keep it capable to track on pump gas as well?
Full_Tilt_Boogie is offline   Reply With Quote
Old 09-03-2013, 11:06 PM   #337
Supporting Vendor
Thread Starter
iTrader: (3)
 
emilio700's Avatar
 
Join Date: May 2005
Posts: 5,308
Total Cats: 1,326
Default

Quote:
Originally Posted by Full_Tilt_Boogie View Post
That thing is begging for compression, especially on E85. Or are you trying to keep it capable to track on pump gas as well?
Classing configuration. Cams, big valves and porting gain us a lot more power than displacement and compression and we cant do all. NASA Performnce Touring rules allow a wide variety of mods but you must pick from just a few.
emilio700 is offline   Reply With Quote
Old 09-03-2013, 11:13 PM   #338
Senior Member
 
Join Date: Feb 2007
Location: Aliso Viejo, CA
Posts: 791
Total Cats: 172
Default

Quote:
Originally Posted by emilio700 View Post
Classing configuration. Cams, big valves and porting gain us a lot more power than displacement and compression and we cant do all. NASA Performnce Touring rules allow a wide variety of mods but you must pick from just a few.
This would imply that you're NOT running a dyno reclass on crusher?
doward is offline   Reply With Quote
Old 09-03-2013, 11:19 PM   #339
Senior Member
iTrader: (3)
 
Join Date: Dec 2008
Location: KY
Posts: 698
Total Cats: 48
Default

No dyno reclass? Interesting...

Edit: Doh... what dan said.
jpreston is offline   Reply With Quote
Old 09-03-2013, 11:30 PM   #340
Supporting Vendor
Thread Starter
iTrader: (3)
 
emilio700's Avatar
 
Join Date: May 2005
Posts: 5,308
Total Cats: 1,326
Default

Quote:
Originally Posted by doward View Post
This would imply that you're NOT running a dyno reclass on crusher?
Being an NB2, we don't need to. Zero point short block frees up a few valuable points for 225's and a splitter.

As the years go by I have learned to generate more power and grip with fewer and simpler mods. This knowledge enables us to use a few precious points elsewhere. Jeff Prestons 2012 TTE winning car is a brilliant example of that. 185's freed up points for aero. Small tires only last 2 laps before going off but its a TT.

The key in building a PT/TT is to not assume you "need" any particular mod to win. Review alternative setups to gain speed. That and not leaving anything on the table in free mods.
emilio700 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Project 200whp N/A emilio700 Engine Performance 317 10-25-2015 12:30 PM
FS: race ready 99 Miata "Crusher" emilio700 Race Prep 26 11-07-2013 10:01 PM
SuperMiata @ 2012 NASA Nationals Mid Ohio emilio700 General Miata Chat 58 10-29-2012 07:27 PM
Team 949 Racing/Supermiata wins 3 classes @ Infineon emilio700 Race Prep 26 10-05-2012 02:44 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 10:20 PM.