Turbo manifold styles- Absurdflow lowmount vs ramhorn, which for maximum power? - Page 5 - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


DIY Turbo Discussion greddy on a 1.8? homebrew kit?

Reply
 
 
 
LinkBack Thread Tools
Old 02-05-2011, 02:16 AM   #81
Senior Member
iTrader: (34)
 
ARTech's Avatar
 
Join Date: Mar 2009
Location: Dallas
Posts: 530
Total Cats: 9
Default

Quote:
Originally Posted by sixshooter View Post
Fluid dynamics favors a design with the fewest bends from a drag and loss of impulse energy standpoint. You want very few 90s and no 180s if you want to maximize the effect of energy pulses on the turbine and not slamming into a corner and being dissipated as heat or rebounding. I don't have access to the fluid dynamics programs that some of you were using for intake manifold design, but many of the same principles are applicable. I recall that each 90 creates as much drag as 20 feet of straight pipe of the same diameter. If you must bend, use wide sweeping arcs.
You're ignoring one very important factor, merge angle. That is the reason a ramhorn outperforms other designs. It's the only manifold design I've made so far that pulls a vacumm (exhaust scavenging) on the non firing runners. Any other manifold does the opposite. Packaging, makes it impossible to make a low merge angle manifold without introducing bends, many of them, so for best flow, low merge angle is more important than the amount of bends. And as mentioned earlier in the thread, just take a look as some of the top performing engines in any type of racing. They can't all be wrong.

As far as spool, shorter runners=faster spool. Full race, with their extensive experience in manifold building, agrees, even though saying otherwise would help their sales. They have no reason to lie. Sorry Bob, but I think you're wrong on that one. There may be other factors contributing to your fast spool, if it is indeed faster with the same displacement.

A low angle merge manifold with the shortest possible runners is the ticket. Tim, your designs look awesome. Have you started working on one yet?
ARTech is offline   Reply With Quote
Old 02-05-2011, 02:39 AM   #82
mkturbo.com
iTrader: (24)
 
shuiend's Avatar
 
Join Date: May 2006
Location: Charleston SC
Posts: 13,775
Total Cats: 1,106
Default

Quote:
Originally Posted by ARTech View Post
A low angle merge manifold with the shortest possible runners is the ticket. Tim, your designs look awesome. Have you started working on one yet?
Hopefully Tim starts working on one for me sometime at the beginning on March.
shuiend is offline   Reply With Quote
Old 02-05-2011, 09:46 AM   #83
Elite Member
iTrader: (2)
 
Join Date: Jan 2007
Location: Los Angeles, CA
Posts: 8,782
Total Cats: 119
Default

So. Will your car be ready for spring dyno day?
Faeflora is offline   Reply With Quote
Old 02-05-2011, 11:52 AM   #84
Elite Member
iTrader: (9)
 
TurboTim's Avatar
 
Join Date: Jun 2006
Location: Chesterfield, NJ
Posts: 6,479
Total Cats: 248
Default

Quote:
Originally Posted by ARTech View Post
Tim, your designs look awesome. Have you started working on one yet?
Thanks buddy. Besides the cleaned up CAD models I haven't done anything more.
TurboTim is offline   Reply With Quote
Old 02-05-2011, 12:58 PM   #85
mkturbo.com
iTrader: (24)
 
shuiend's Avatar
 
Join Date: May 2006
Location: Charleston SC
Posts: 13,775
Total Cats: 1,106
Default

Quote:
Originally Posted by Faeflora View Post
So. Will your car be ready for spring dyno day?
Only if yours is.
shuiend is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
97 1.8 turbo manifold and turbo combo. need help AnotherDamnMiata DIY Turbo Discussion 26 11-20-2015 12:34 AM
Partial Turbo kit for a 1.6 and dual headlight kit. Andifer Miata parts for sale/trade 8 09-23-2015 06:43 PM
1.6l turbo manifold tottestad WTB 0 09-22-2015 09:07 AM
1991 Turbo Miata partout tottestad Miata parts for sale/trade 18 09-14-2015 08:52 PM
WTB 1.8 manifold and turbo (preferred ball bearing) AnotherDamnMiata WTB 13 09-11-2015 11:56 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 10:53 AM.