Anyone have any flowbench #? - 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 12-13-2007, 03:05 PM   #1
Senior Member
Thread Starter
iTrader: (14)
 
brgracer's Avatar
 
Join Date: Nov 2004
Location: Ambler, PA
Posts: 1,275
Total Cats: 1
Question Anyone have any flowbench #?

Just wondering if anyone happens to have any flowbench numbers on a 94-97 1.8L head with/without headwork? I've seen the 99 head numbers from FM's site as well as the pics of the better port placements, but curious as to the actual flow rates. Thanks.
brgracer is offline   Reply With Quote
Old 12-13-2007, 03:12 PM   #2
Senior Member
Thread Starter
iTrader: (14)
 
brgracer's Avatar
 
Join Date: Nov 2004
Location: Ambler, PA
Posts: 1,275
Total Cats: 1
Default

Here's what I have found so far, but more numbers would be great.

Fully ported 1.8 with stock valve sizes....lots of work. IRTB manifold, stock exhaust manifold. Measured at 28" average.

Intake Exhaust
.050 43.2 32.5
.100 84.3 65.4
.20 158.3 131.9
.25 183.1 151.7
.30 197.4 164.3
.35 205.8 171.4
.40 211.9 176.6
.45 213.8 183.1

Stock 1.6, stock intake manifold, stock exhaust. Measured at 28" average.

Intake Exhaust
.050 37 35
.100 67.8 63.7
.20 128 118.5
.25 146 137
.30 160 147
.35 166 152
.40 169 154
.45 172 156
brgracer is offline   Reply With Quote
Old 12-13-2007, 03:15 PM   #3
Senior Member
Thread Starter
iTrader: (14)
 
brgracer's Avatar
 
Join Date: Nov 2004
Location: Ambler, PA
Posts: 1,275
Total Cats: 1
Default

99 head from FM at same 28" intake is 1st picture and exhaust is 2nd.



brgracer is offline   Reply With Quote
Old 12-13-2007, 03:29 PM   #4
Elite Member
iTrader: (12)
 
Join Date: Aug 2006
Location: Central-ish VA
Posts: 4,449
Total Cats: 16
Default

Looks like the 1.8 head numbers you posted basically matches the 99 numbers with back cut/unshrouded stock valves.
neogenesis2004 is offline   Reply With Quote
Old 12-13-2007, 03:32 PM   #5
Elite Member
iTrader: (9)
 
TurboTim's Avatar
 
Join Date: Jun 2006
Location: Chesterfield, NJ
Posts: 6,485
Total Cats: 248
Default

My old boss is the owner of M2 Race Systems, fancy 5 axis cnc heads and stuff. He said he'd like to do a miata head, I have a spare '94 head that he or I can digitize and recreate. But we need to find a person (me?) to hand port one cylinder first. I dont' want to pay anyone who's good at it, and I don't know if it's worth the time on a non-99-00 head. But the source is there...

But looks like you got the info you were looking for anyway.
TurboTim is offline   Reply With Quote
Old 12-13-2007, 03:37 PM   #6
Senior Member
Thread Starter
iTrader: (14)
 
brgracer's Avatar
 
Join Date: Nov 2004
Location: Ambler, PA
Posts: 1,275
Total Cats: 1
Default

Quote:
Originally Posted by neogenesis2004 View Post
Looks like the 1.8 head numbers you posted basically matches the 99 numbers with back cut/unshrouded stock valves.
Problem is that I'm not sure how much "work" was really put into it. I found it from an old post of gibb's from around 2002 or something like that.
brgracer is offline   Reply With Quote
Old 12-13-2007, 03:43 PM   #7
Elite Member
iTrader: (12)
 
Join Date: Aug 2006
Location: Central-ish VA
Posts: 4,449
Total Cats: 16
Default

Oh, will if it was his then I'm sure everything was touched. What does a stock na 1.8 head flow I wonder.
neogenesis2004 is offline   Reply With Quote
Old 12-13-2007, 03:46 PM   #8
Senior Member
Thread Starter
iTrader: (14)
 
brgracer's Avatar
 
Join Date: Nov 2004
Location: Ambler, PA
Posts: 1,275
Total Cats: 1
Default

Quote:
Originally Posted by neogenesis2004 View Post
Oh, will if it was his then I'm sure everything was touched. What does a stock na 1.8 head flow I wonder.
Yeah, me too which is why I asked, I hope someone has the info. Did you happen to get your head flowtested? Would be interesting to compare to the stock 1.6 test I posted.
brgracer is offline   Reply With Quote
Old 12-13-2007, 03:49 PM   #9
y8s
2 Props,3 Dildos,& 1 Cat
iTrader: (8)
 
y8s's Avatar
 
Join Date: Jun 2005
Location: Fake Virginia
Posts: 19,038
Total Cats: 407
Default

Quote:
Originally Posted by TurboTim View Post
My old boss is the owner of M2 Race Systems, fancy 5 axis cnc heads and stuff. He said he'd like to do a miata head, I have a spare '94 head that he or I can digitize and recreate. But we need to find a person (me?) to hand port one cylinder first. I dont' want to pay anyone who's good at it, and I don't know if it's worth the time on a non-99-00 head. But the source is there...

But looks like you got the info you were looking for anyway.
I've got a spare 01 head that's gonna get ported.... is that useful?
y8s is offline   Reply With Quote
Old 12-13-2007, 03:50 PM   #10
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,889
Total Cats: 1,792
Default

why are these flowed at 28" of water.

we all know based on Randy's flows of the 1.6 AFM that all measurements need to be taken at 15" of water. Therefore rendering the AFM a huge restriction in the intake that's barely able to flow enough to support the HP output to the wheels.

cause 28" of water is only used when measuring for forced induction purposes. it's not a standard of measurement or anything....


sorry, too many debates about that on m.net. just had to
Braineack is offline   Reply With Quote
Old 12-13-2007, 03:51 PM   #11
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,889
Total Cats: 1,792
Default

Quote:
Originally Posted by TurboTim View Post
My old boss is the owner of M2 Race Systems, fancy 5 axis cnc heads and stuff. He said he'd like to do a miata head, I have a spare '94 head that he or I can digitize and recreate. But we need to find a person (me?) to hand port one cylinder first. I dont' want to pay anyone who's good at it, and I don't know if it's worth the time on a non-99-00 head. But the source is there...

But looks like you got the info you were looking for anyway.

I have a spare 1.6L head too.
Braineack is offline   Reply With Quote
Old 12-13-2007, 03:52 PM   #12
Ben
Supporting Vendor
iTrader: (33)
 
Ben's Avatar
 
Join Date: Jul 2006
Location: atlanta-ish
Posts: 12,689
Total Cats: 99
Default

I have a 99 head
Ben is offline   Reply With Quote
Old 12-13-2007, 04:00 PM   #13
Elite Member
iTrader: (12)
 
Join Date: Aug 2006
Location: Central-ish VA
Posts: 4,449
Total Cats: 16
Default

I stole this from an m.net search


Hear are the flow number from my 96 head, done at the same shop Gibb's head was done at.
LIFT Stk-In Port-In Stk-EX Port-EX
0.050 36.8. 41.2 32.3 34.8
0.100 71.4. 82.4 63.8 72.2
0.150 115.0 122.2 92.9 102.0
0.200 148.5 157.4 124.3 130.2
0.250 173.8 184.2 143.1 157.6
0.300 191.0 206.0 152.8 177.0
0.350 195.4 214.1 158.6 188.8
0.400 201.8 223.7 160.8 196.7
0.450 203.9 227.5 163.1 201.2
0.500 206.0 231.2 165.8 205.7
neogenesis2004 is offline   Reply With Quote
Old 12-13-2007, 05:16 PM   #14
Junior Member
 
Join Date: Jul 2006
Location: UK
Posts: 157
Total Cats: 0
Default

I have before and after flow numbers for my '99 head. Think the numbers are on my website, not got time to look as I am about to go out to pub. If not I can post them up later.
slowmx5 is offline   Reply With Quote
Old 12-14-2007, 01:44 PM   #15
Junior Member
 
Join Date: Jul 2006
Location: UK
Posts: 157
Total Cats: 0
Default

OK. The values are not on my website, yet another of those items on the to do list that I do not have time for right now. Anyway here are the figures:

Exhaust flow (cfm) using 110 Flow Bench, using 10" water
Lift 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45
Stock 16.90 36.17 54.55 72.97 84.40 91.94 95.54 97.70 99.86
Fully modded 20.00 47.95 71.26 91.58 102.69 111.12 115.16 118.04 120.20
% imp 18.34 32.57 30.63 25.50 21.67 20.86 20.54 20.82 20.37

Inlet flow (cfm) using 110 flow bench and 10" water.
Lift 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45
Stock 21.80 43.28 66.72 87.84 103.29 113.13 118.75 122.47 124.50
Fully modded 23.42 47.16 71.40 94.71 114.53 128.59 137.02 141.49 144.26
% imp 7.43 8.96 7.01 7.82 10.88 13.67 15.39 15.53 15.87

I only have the post-modification figures for measurements made with a 600 Flow Bench, at 25" water:
Inlet
38.50 79.50 120.75 153.40 185.85 206.50 221.25 227.15 232.46
Exhaust
34.97 80.86 112.26 141.93 156.69 167.48 173.80 180.12 184.86


Reason for using the 110 flow bench is that it provides more accurate than the 600 at 28".
slowmx5 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Hybrid B6/ZM-DE engine build crowder92 Build Threads 66 07-11-2014 08:09 PM
Easiest/cheapest way to test intake manifold for equal flow? ftjandra DIY Turbo Discussion 7 10-30-2012 09:46 AM
Any suggestions for shops for head work kaisersoze Engine Performance 1 08-12-2009 12:58 AM
Craigslist: 1991: Most expensive NA Miata Partout EVER: elesjuan Cars for sale/trade 27 03-25-2009 04:49 PM
$10,000 will buy you this pile of shit.... Doppelgänger Insert BS here 27 01-07-2009 07:38 PM


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 03:56 PM.