home register FAQ memberlist calendar

Go Back   Turbobricks Forums > Mechanical > performance & modifications

Reply
 
Thread Tools Display Modes
Old 10-17-2022, 12:44 PM   #51
redblockpowered
mails files to people
 
redblockpowered's Avatar
 
Join Date: May 2015
Location: Swampscott, MA
Default

Quote:
Originally Posted by Harlard View Post
Compare the angle of the throat of the port relative to the mating flange to that of the runners on the manifold. My guess is that there is s sharp turn that does not exist in the other combination.
This is the prevailing theory for sure. We tested the B21F manifold on both heads and the results were much better for the 631. I think it'd work best with a more upswept manifold like on an M50/M52. I have the numbers but I can't find them at the moment. Looked like a pretty even trade off between the ported 530 with B21F intake and stock 631 with the same.

I think there's a decent amount of potential in this thing but it's too rare and strange to really be worth messing with.
__________________
1993 944 B230FT/M90 thread here: http://forums.turbobricks.com/showthread.php?t=345277
2x 1991 245 B230F/M47 (LeMons car, street car)
I sell chips for LH 2.4!
If you live in the Northeast US, I'll drive to you and tune your LH 2.4 car!
redblockpowered is offline   Reply With Quote
Old 10-17-2022, 01:28 PM   #52
culberro
Ronald Culberbone III
 
culberro's Avatar
 
Join Date: Feb 2010
Location: Redmond, OR
Default

Quote:
Originally Posted by redblockpowered View Post
This is the prevailing theory for sure. We tested the B21F manifold on both heads and the results were much better for the 631. I think it'd work best with a more upswept manifold like on an M50/M52. I have the numbers but I can't find them at the moment. Looked like a pretty even trade off between the ported 530 with B21F intake and stock 631 with the same.

I think there's a decent amount of potential in this thing but it's too rare and strange to really be worth messing with.
The flow of a "heron" head is normally ok.... but it's usually a trade off for really heavy pistons and marginal high lift flow due to no diffuser angle in the valve job.

The intake port bias tho

http://www.italian.sakura.ne.jp/bad_...9bb0e91a_b.jpg
__________________
Cult Person. Pissing in your Kool-Aid.

Head work: https://forums.turbobricks.com/showthread.php?t=349975

Temp Sender Adapters: https://forums.turbobricks.com/showthread.php?t=348169
culberro is offline   Reply With Quote
Old 10-17-2022, 02:13 PM   #53
shoestring
Board Member
 
shoestring's Avatar
 
Join Date: Jun 2009
Location: Swampscott, 01907
Default

I go away for a weekend and some weird stuff happens.
__________________
I AM THE MODAL AMERICAN. Planet money #936.
shoestring is offline   Reply With Quote
Old 10-17-2022, 02:30 PM   #54
culberro
Ronald Culberbone III
 
culberro's Avatar
 
Join Date: Feb 2010
Location: Redmond, OR
Default

Quote:
Originally Posted by shoestring View Post
I go away for a weekend and some weird stuff happens.


Are you guys calculating CFM now over a plate or with an electronic pitot/orifice setup yet?
culberro is offline   Reply With Quote
Old 10-17-2022, 02:55 PM   #55
redblockpowered
mails files to people
 
redblockpowered's Avatar
 
Join Date: May 2015
Location: Swampscott, MA
Default

Nope, still rocking the water column. Accurate but unpleasant.
redblockpowered is offline   Reply With Quote
Old 10-17-2022, 02:56 PM   #56
Smorgesborg
Board Member
 
Join Date: Apr 2020
Location: Eastern MA
Default

"Unpleasant" is certainly one way to put it, though I'd considered it an understatement.
Smorgesborg is offline   Reply With Quote
Old 10-17-2022, 03:34 PM   #57
redblockpowered
mails files to people
 
redblockpowered's Avatar
 
Join Date: May 2015
Location: Swampscott, MA
Default

For the record it's Smorgesborg's 631.
redblockpowered is offline   Reply With Quote
Old 10-17-2022, 04:06 PM   #58
Smorgesborg
Board Member
 
Join Date: Apr 2020
Location: Eastern MA
Default

I'd also like to say, for the record, that it took about 90 minutes to get the water back in at the appropriate level. For anybody wanting to recreate this I recommend using a MAP sensor and an arduino with an LED screen instead to avoid water evaporation.

Edit; referring to flow bench.

Last edited by Smorgesborg; 10-17-2022 at 05:45 PM..
Smorgesborg is offline   Reply With Quote
Old 10-17-2022, 05:32 PM   #59
Quin
ಠ_ಠ
 
Join Date: Jun 2007
Location: Soldotna, AK
Default

Quote:
Originally Posted by Smorgesborg View Post
For anybody wanting to recreate this...
i don't think that will be a common issue.
__________________
Quin is offline   Reply With Quote
Old 10-17-2022, 08:06 PM   #60
Smorgesborg
Board Member
 
Join Date: Apr 2020
Location: Eastern MA
Default

Quote:
Originally Posted by Quin View Post
i don't think that will be a common issue.
Probably not, but just a mild warning to those that see this thread in the future that want to frequently flow cylinder heads on the smallest of budgets.
Smorgesborg is offline   Reply With Quote
Old 10-18-2022, 11:40 AM   #61
culberro
Ronald Culberbone III
 
culberro's Avatar
 
Join Date: Feb 2010
Location: Redmond, OR
Default

If only there were cheap differential pressure sensors that could read in-h2o....

https://www.amazon.com/Professional-...45&sr=8-4&th=1

https://www.amazon.com/Handheld-Mano...%2C145&sr=8-20

Last edited by culberro; 10-18-2022 at 12:03 PM..
culberro is offline   Reply With Quote
Old 10-18-2022, 12:24 PM   #62
redblockpowered
mails files to people
 
redblockpowered's Avatar
 
Join Date: May 2015
Location: Swampscott, MA
Default

Really this would be nice for accuracy alone. Dealing with ruler parallax will only work for so long.
redblockpowered is offline   Reply With Quote
Old 10-18-2022, 06:43 PM   #63
shoestring
Board Member
 
shoestring's Avatar
 
Join Date: Jun 2009
Location: Swampscott, 01907
Default

Quote:
Originally Posted by culberro View Post
If only there were cheap differential pressure sensors that could read in-h2o....

https://www.amazon.com/Professional-...45&sr=8-4&th=1

https://www.amazon.com/Handheld-Mano...%2C145&sr=8-20
https://www.kleintools.com/catalog/e...tial-manometer

Modern-era measurement entered.
shoestring is offline   Reply With Quote
Old 10-18-2022, 06:47 PM   #64
threewagons
i am the liquor
 
threewagons's Avatar
 
Join Date: May 2010
Location: NEKansas
Default

Quote:
Originally Posted by Smorgesborg View Post
I'd also like to say, for the record, that it took about 90 minutes to get the water back in at the appropriate level. For anybody wanting to recreate this I recommend using a MAP sensor and an arduino with an LED screen instead to avoid water evaporation.

Edit; referring to flow bench.
or don't use water
__________________
the 945
threewagons is offline   Reply With Quote
Old 10-18-2022, 07:18 PM   #65
joel142
Board Member
 
Join Date: May 2003
Location: Seattle, WA
Default

Quote:
Originally Posted by culberro View Post
I've actually used this one - works really well.
__________________
'71 142E, B230FT, M41, Corbeau GT seats, iPd bars and springs, Nardi wheel, GT gauges, Bilsteins, Canisto wheels, 7" Cibies
'95 T5-R, yellow, M56H swap
'06 R500, Built like a steak house; handles like bistro
joel142 is offline   Reply With Quote
Old 11-22-2022, 08:08 PM   #66
redblockpowered
mails files to people
 
redblockpowered's Avatar
 
Join Date: May 2015
Location: Swampscott, MA
Default

We've digitized it:



Just a baseline has been done so far. It needs a little orifice to slow down the changes in reading but other than that works pretty well.
redblockpowered is offline   Reply With Quote
Old 11-22-2022, 10:01 PM   #67
Harlard
Hurlurd?Harland?Bueller?
 
Harlard's Avatar
 
Join Date: May 2007
Location: PDX
Default

oooooooo!
__________________
Herr Harlard am Erstens
1979 242 DL




Quote:
Originally Posted by Quin View Post
I hate the car and also cannot be free of it. I dream of having a different project but cannot separate myself emotionally from this one and so remain bonded to it like Sisyphus to his great stone.
Harlard is offline   Reply With Quote
Old 11-22-2022, 11:29 PM   #68
redblockpowered
mails files to people
 
redblockpowered's Avatar
 
Join Date: May 2015
Location: Swampscott, MA
Default

I'd love to try and test exhaust manifolds and turbine housings on this thing. Unfortunately my only 90+ is installed and I need it to get to work.
redblockpowered is offline   Reply With Quote
Old 11-23-2022, 09:45 AM   #69
widewagon92
now with more caffeine!
 
widewagon92's Avatar
 
Join Date: Apr 2020
Location: Maryland
Default

I've got a 90+ and one of the old garrett manifolds sitting on a shelf that I'd donate to the cause, but I'm down in Maryland. I'm game to meet somewhere along the way for a baton pass if you're making a trip south anytime soon. I imagine shipping would be pricey.
widewagon92 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

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 On

Forum Jump


All times are GMT -4. The time now is 11:10 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2022, vBulletin Solutions Inc.