Twin-scroll Rx-7 turbo? - 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 02-24-2010, 02:50 AM   #1
Senior Member
Thread Starter
iTrader: (3)
 
Join Date: May 2008
Location: Fargo, ND
Posts: 534
Total Cats: 3
Default Twin-scroll Rx-7 turbo?

I know this will probably get dinged as a stupid question, and no, I'm not going to try to put it on my MSM.... But I have an S5 rotary engine chilling in my garage... and I was looking at the turbo, and was curious what it would do in a miata. I think it might be an interesting unit to run. Say you took the factory RX7 manifold and cut off the flange and used that, then made a manifold with 1-3 and 2-4 runners feeding the seprate inlets on the turbo... I know there is a bit of benefit separating the exhaust like that so you don't have the.. I forget the term, but basically a resonance that causes issues between offset exhaust strokes.

Anyway, would this be something interesting/worthwhile, or just another dumb/cheap/crappy turbo build where nothing is matched right/well.

Just sayin, if maybe I had an NA or something lying around and too much time with a welder..
chance91 is offline   Reply With Quote
Old 02-26-2010, 02:23 AM   #2
Junior Member
iTrader: (2)
 
Join Date: Aug 2006
Location: Louisville Kentucky
Posts: 222
Total Cats: 0
Default

If I remember correctly the turbo is made by hitachi, with a ridiculously big turbine wheel and a relatively small compressor wheel. I don't think it would be worth a **** on a miata, I know they aren't worth a **** on my TII.

Should look like this, right?
Name:  Picture333008-1.jpg
Views: 4
Size:  363.7 KB
TwoScoopsofHooah is offline   Reply With Quote
Old 02-26-2010, 03:23 AM   #3
Senior Member
Thread Starter
iTrader: (3)
 
Join Date: May 2008
Location: Fargo, ND
Posts: 534
Total Cats: 3
Default

Yea, thats basically it. I just have a few turbos lying around the house. I got around to looking deeper, it looks like its way to big in any sort of way for the miata, honestly. It would be an interesting unit on a 2.4l or so. The only reason one would even use something that old is for the twin-scroll setup, which is sort of hard to find on a stock vehicle, no?

The one I have is in very good shape all things considered. I had the A/R's earlier I need to look them up again. Then measure some stuff. No compressor graphs for it.

And I think its a Hitatchi HT-18 and there are some other things after that. Like S2 or something.. can remember.
chance91 is offline   Reply With Quote
Old 02-27-2010, 08:39 PM   #4
Junior Member
 
Join Date: Feb 2010
Posts: 277
Total Cats: 4
Default

A buddy of mine tried my old stock T2 turbo on his B18C. It was honestly a terrible match. I'd sell the S5 turbo for $150 or so (assuming it's in good shape) and get a china charger or something for the same money. It really isn't worth it in my opinion/experience.
Sam TII is offline   Reply With Quote
Old 02-28-2010, 01:51 AM   #5
Senior Member
Thread Starter
iTrader: (3)
 
Join Date: May 2008
Location: Fargo, ND
Posts: 534
Total Cats: 3
Default

Quote:
Originally Posted by Sam TII View Post
A buddy of mine tried my old stock T2 turbo on his B18C. It was honestly a terrible match. I'd sell the S5 turbo for $150 or so (assuming it's in good shape) and get a china charger or something for the same money. It really isn't worth it in my opinion/experience.
Good to heard.

After more research I kind of figured that'd be what the outcome would be. It looks like others who were able to almost bolt it up to a stock nissan manifold and on the 2.0 nissan it was a dog, someone mentioned on a 2.4/2.5, i forget, nissan motor it was a decent match, but still a bit slow. So, I guess its just one of those things about rotary's, they don't act like other gas motors in many ways.
chance91 is offline   Reply With Quote
Old 02-28-2010, 02:02 AM   #6
Senior Member
Thread Starter
iTrader: (3)
 
Join Date: May 2008
Location: Fargo, ND
Posts: 534
Total Cats: 3
Default

Quote:
Originally Posted by Sam TII View Post
A buddy of mine tried my old stock T2 turbo on his B18C. It was honestly a terrible match. I'd sell the S5 turbo for $150 or so (assuming it's in good shape) and get a china charger or something for the same money. It really isn't worth it in my opinion/experience.
Good to heard.

After more research I kind of figured that'd be what the outcome would be. It looks like others who were able to almost bolt it up to a stock nissan manifold and on the 2.0 nissan it was a dog, someone mentioned on a 2.4/2.5, i forget, nissan motor it was a decent match, but still a bit slow. So, I guess its just one of those things about rotary's, they don't act like other gas motors in many ways.
chance91 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Project Gemini - Turbo Civic on the Cheap Full_Tilt_Boogie Build Threads 58 Yesterday 10:04 PM
WTB MP62 (Hotside) (NB2) Rick02R WTB 3 01-03-2016 08:18 PM
Expected intake temps on the track? tazswing Race Prep 20 10-03-2015 12:04 PM
ISO 1.6 turbo cast iron manifold cale saurage DIY Turbo Discussion 16 10-01-2015 12:25 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 07:14 PM.