Andy Hollis' One Lap Miata (K24 Honda power) - Page 10 - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


General Miata Chat A place to talk about anything Miata

Reply
 
 
 
LinkBack Thread Tools
Old 06-03-2015, 01:03 PM   #181
SADFab Destructive Testing Engineer
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 17,997
Total Cats: 1,463
Default

<p>
Quote:
Originally Posted by AndyHollis View Post
This is a build thread...let's try and stay on topic, k?
</p><p>Asking MT.net to stay on topic is like telling a fat kid not to eat cake...not gonna happen.</p>
aidandj is offline   Reply With Quote
Old 06-03-2015, 01:44 PM   #182
Moderator
iTrader: (11)
 
sixshooter's Avatar
 
Join Date: Nov 2008
Location: Tampa, Florida
Posts: 15,669
Total Cats: 1,561
Default

There's cake?
sixshooter is offline   Reply With Quote
Old 06-03-2015, 02:21 PM   #183
Senior Member
iTrader: (14)
 
Join Date: Jan 2007
Location: Murfreesboro,TN
Posts: 1,277
Total Cats: 53
Default

I hope its chocolate...
Midtenn is offline   Reply With Quote
Old 06-03-2015, 02:34 PM   #184
I take big bites
iTrader: (1)
 
turbofan's Avatar
 
Join Date: Sep 2010
Location: Hurricane, UT
Posts: 6,924
Total Cats: 526
Default

Somebody said cake. I'm in.
turbofan is offline   Reply With Quote
Old 06-03-2015, 03:13 PM   #185
SADFab Destructive Testing Engineer
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 17,997
Total Cats: 1,463
Default

<p>First mobius donuts, now andys cake thread. We're all fatboys.</p>
aidandj is offline   Reply With Quote
Old 06-03-2015, 03:41 PM   #186
Supporting Vendor
iTrader: (3)
 
emilio700's Avatar
 
Join Date: May 2005
Posts: 5,313
Total Cats: 1,335
Default

Quote:
Originally Posted by AndyHollis View Post
The ITB's went away when the car was converted "down" from CSP to STS trim.
Those ITB's ended up here.
emilio700 is offline   Reply With Quote
Old 06-08-2015, 08:56 PM   #187
Junior Member
Thread Starter
 
Join Date: Nov 2006
Posts: 284
Total Cats: 149
Default

Ok, back on topic...

Cold-air intake, version 1: cowl-fed.

2x2" holes in the cowl feeding coroplast sealed intake chamber.

Looks pretty good, but datalogger results say...Fail. 146 degrees IAT after a couple of laps.

Back to the drawing board...

Attached Thumbnails
Andy Hollis' One Lap Miata (K24 Honda power)-186a7403-204a-485d-b912-efa3a3699be5_zpstxeqnts9.jpg  
AndyHollis is offline   Reply With Quote
Old 06-08-2015, 08:57 PM   #188
Junior Member
Thread Starter
 
Join Date: Nov 2006
Posts: 284
Total Cats: 149
Default

Took the car for its first competition outing...Optima Ultimate Street Car Challenge at NCM Motorsports Park. Managed 4 th in the autocross and 6th in the track competition in the fastest class. Learned a bunch about the setup.

Big items to solve ASAP:

1) Do something about underhood temps. Need to install the double-ceramic-coated headers and vent the hood.

2) Need better cold-air intake setup. This one was delivering IAT's of 146, killing lots of power.

3) Clutch is slipping after about 4 hard laps on the 4-5 shift only (other shifts are fine). Granny shifting will save it sorta...but it's a problem. Not sure if heat -related (downppe is right next to clutch housing) or simply insufficient pressure plate clamping,

4) Once the car is really hot, the throttle likes to hang partially open...about 4K rpm idle worth.

Attached Thumbnails
Andy Hollis' One Lap Miata (K24 Honda power)-1342f085-56cf-4115-89eb-a28ee202ce77_zpscgmsgibs.jpg  
AndyHollis is offline   Reply With Quote
Old 06-08-2015, 09:28 PM   #189
Junior Member
Thread Starter
 
Join Date: Nov 2006
Posts: 284
Total Cats: 149
Default

Curb-hopping like a boss:
Attached Thumbnails
Andy Hollis' One Lap Miata (K24 Honda power)-ncm_zps6rmrh8ja.jpg  
AndyHollis is offline   Reply With Quote
Old 06-08-2015, 09:37 PM   #190
Elite Member
iTrader: (4)
 
Join Date: Sep 2006
Location: Charlotte, NC
Posts: 3,051
Total Cats: 7
Default

Nice chatting with you at NCM and congrats on a strong showing against all those super cars!

Cheers
Efini~FC3S is offline   Reply With Quote
Old 06-08-2015, 10:48 PM   #191
Junior Member
iTrader: (2)
 
Join Date: Apr 2014
Location: Mountain View, CA
Posts: 362
Total Cats: 21
Default

I'm curious what other types of cars were in your class?
OneTwo is offline   Reply With Quote
Old 06-08-2015, 10:55 PM   #192
I take big bites
iTrader: (1)
 
turbofan's Avatar
 
Join Date: Sep 2010
Location: Hurricane, UT
Posts: 6,924
Total Cats: 526
Default

As am I. No aero and still dialing it in, and 6th place? What beat you?
turbofan is offline   Reply With Quote
Old 06-08-2015, 11:10 PM   #193
Junior Member
Thread Starter
 
Join Date: Nov 2006
Posts: 284
Total Cats: 149
Default

Quote:
Originally Posted by turbofan View Post
As am I. No aero and still dialing it in, and 6th place? What beat you?
Danny Popp in a Lingenfelter-motored C5 Z06, and a handful of well-built Mitsubishi Evos.

The autocross and speed stop both have stage lines about five feet from the start line, which hands the AWD cars about a half a second advantage right off the bat. Hard to make that up. But the one Evo is super well-driven and engineered (same one which podiumed at One Lap this year).

I also got dicked on the engineering review and still have no clue as to why. Almost DFL on that segment.

Event Results

Last edited by AndyHollis; 06-08-2015 at 11:34 PM.
AndyHollis is offline   Reply With Quote
Old 06-09-2015, 12:08 AM   #194
Elite Member
iTrader: (1)
 
Leafy's Avatar
 
Join Date: Jun 2012
Location: NH
Posts: 9,093
Total Cats: 90
Default

Quote:
Originally Posted by AndyHollis View Post
I also got dicked on the engineering review and still have no clue as to why. Almost DFL on that segment.
Probably didnt have an optima battery and parts from the rest of the sponsors. Or so I've heard thats the trick.
Leafy is offline   Reply With Quote
Old 06-09-2015, 12:28 AM   #195
Newb
 
Join Date: Jan 2015
Location: Houston, TX
Posts: 35
Total Cats: -1
Default

Quote:
Originally Posted by AndyHollis View Post
Looks pretty good, but datalogger results say...Fail. 146 degrees IAT after a couple of laps.

Back to the drawing board...
Have you considered copying the Randall Cowl Intake that Flyin Miata carries?



I was under the impression that it is the only one that really works.
Attached Thumbnails
Andy Hollis' One Lap Miata (K24 Honda power)-05-28000.jpg  
HoustonNW is offline   Reply With Quote
Old 06-09-2015, 12:35 AM   #196
Supporting Vendor
 
KMiata's Avatar
 
Join Date: Sep 2012
Posts: 444
Total Cats: 145
Default

Looking good as always Andy. I'm curious what you come up with for the intake. You know, so I can steal your idea....
KMiata is offline   Reply With Quote
Old 06-09-2015, 04:18 AM   #197
SADFab Destructive Testing Engineer
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 17,997
Total Cats: 1,463
Default

Hornetball has an awesome cowl intake. I believe its somewhere in his silver car build thread.
aidandj is offline   Reply With Quote
Old 06-09-2015, 05:25 AM   #198
Senior Member
iTrader: (1)
 
Join Date: Jun 2006
Location: Sweden
Posts: 1,391
Total Cats: 58
Default

What's the pressure difference between the wheel well and the cowl?

I get decent temps (measured at the filter) by dividing the engine bay with coroplast and getting air from the wheels (no inner fenders).
But I have a RB header and make less power.
NiklasFalk is offline   Reply With Quote
Old 06-09-2015, 11:44 AM   #199
Elite Member
iTrader: (3)
 
Join Date: Mar 2008
Location: Granbury, TX
Posts: 6,009
Total Cats: 583
Default

Quote:
Originally Posted by aidandj View Post
Hornetball has an awesome cowl intake. I believe its somewhere in his silver car build thread.
Link: https://www.miataturbo.net/build-thr...e3/#post709118. Designed to support ~200HP though -- isn't going to cut it for Andy. Cold air from the front of the car (headlight intake on my Red car) seems to work better. On the Silver car, I'd already cut the hole in the cowl, so I went ahead and re-used it.

I think Andy's diagnosis is spot-on. He's dumping tons of heat into the engine compartment with those big, snaking, uninsulated headers.

Andy, another thing to consider is that simple circular holes cut into sheet metal don't flow well because of the sharp edges. If you riveted some of these in, the radius should help the air get through:

ALUMINUM FLANGES FOR DUCTING from Aircraft Spruce

Last edited by hornetball; 06-09-2015 at 11:59 AM.
hornetball is offline   Reply With Quote
Old 06-09-2015, 11:53 AM   #200
Elite Member
iTrader: (5)
 
m2cupcar's Avatar
 
Join Date: Jan 2005
Location: Atlanta
Posts: 7,242
Total Cats: 290
Default

Quote:
Originally Posted by AndyHollis View Post
Looks pretty good, but datalogger results say...Fail. 146 degrees IAT after a couple of laps.
Any idea why? That's contrary to popular Miata wisdom regarding cowl fed intakes.
m2cupcar is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
elesjuan's mediocre 95 Miata adventure (google fiber edition) elesjuan Build Threads 8 02-16-2016 09:36 PM
Turbo 1995 Miata Low mileage Clean Tekel Cars for sale/trade 29 02-05-2016 05:16 PM
starting issue Johnny Tater Engine Performance 3 09-23-2015 07:10 PM
Foreign powered NB for NASA ST3 and/or E0 d k Race Prep 44 09-15-2015 11:59 AM


Thread Tools

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 12:49 AM.