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-   -   FC RX-7 turbo on a Miata? (https://www.miataturbo.net/diy-turbo-discussion-14/fc-rx-7-turbo-miata-10952/)

Crimson 07-01-2007 07:47 PM

FC RX-7 turbo on a Miata?
 
How would a stock FC RX-7 turbo behave on a Miata? How would spool up time and power output be?

I'm asking because a friend of mine has an extra turbo sitting around he'd be willing to let go for ~$70.

cjernigan 07-01-2007 08:12 PM

There are no manifolds that will mate that to your motor unless you have it custom built and isn't that a weird two stage to twin turbo setup too. Either way no one uses them because it's def not an ideal setup. Ever wonder guys with FCs go single turbo, there is a reason?!
If you want cheap then you would be better off going for a DSM turbo setup. They are widely available at low prices on ebay and forums in used form.

Mach929 07-01-2007 09:05 PM

fc's are already single turbo, but i can't answer your question i don't even know what kind of turbo it is

bripab007 07-01-2007 09:49 PM

The compressor side of the turbo probably would flow about as much as a T25 (think 220rwhp, tops), but the turbine side is way to big for only 1600cc of exhaust gases; it was built for nearly double that.

Harv 07-01-2007 10:38 PM


Originally Posted by cjernigan (Post 127900)
There are no manifolds that will mate that to your motor unless you have it custom built and isn't that a weird two stage to twin turbo setup too. Either way no one uses them because it's def not an ideal setup. Ever wonder guys with FCs go single turbo, there is a reason?!
If you want cheap then you would be better off going for a DSM turbo setup. They are widely available at low prices on ebay and forums in used form.

The FD is the twin turbo RX-7, FC would be the Turbo II.

This one.

http://www.mazdarotary.net/images/Model_Pics/14_p2.jpg

One of my buddies had one of these.

cjernigan 07-01-2007 10:39 PM

Sorry, my experience with rotaries is only with FDs i guess. Never been around single turbos FCs, just single turbo conversion FDs. Wonder what that turbo looks like.

Thanks for the info, i posted a little slower than you it appears. That turbo II is sick.

Crimson 07-02-2007 12:02 AM


Originally Posted by Brian (Post 127923)
The compressor side of the turbo probably would flow about as much as a T25 (think 220rwhp, tops), but the turbine side is way to big for only 1600cc of exhaust gases; it was built for nearly double that.

That turbo is on a 1.3L engine, how is that too big? I've heard mention of the rotary effectively acting like a 2.6L, is that what you're referring to?

jwarriner 07-02-2007 03:23 AM


Originally Posted by Crimson (Post 127974)
That turbo is on a 1.3L engine, how is that too big? I've heard mention of the rotary effectively acting like a 2.6L, is that what you're referring to?

Yes.

Arkmage 07-02-2007 09:50 AM

and when you consider fuel economy it acts like a 6.2L

bripab007 07-02-2007 09:54 AM


Originally Posted by Crimson (Post 127974)
That turbo is on a 1.3L engine, how is that too big? I've heard mention of the rotary effectively acting like a 2.6L, is that what you're referring to?

Yes, that's exactly what I'm referring to. The rotary only displaces 1300cc, but it displaces that amount twice as quickly as our 1600cc boinger motors.

RotorNutFD3S 07-02-2007 10:12 AM


Originally Posted by Arkmage (Post 128041)
and when you consider fuel economy it acts like a 6.2L

LMAO! So true!

ApexOnYou 07-02-2007 01:05 PM


Originally Posted by Arkmage (Post 128041)
and when you consider fuel economy it acts like a 6.2L

Hahaha you beat me to it.

Crimson 07-02-2007 06:46 PM

Fair enough, that idea is out. Now if only I could find a GT2560R for around $100 I'd be all set...

cjernigan 07-02-2007 07:52 PM

Good luck finding one for $100.
You could get a SR20 T25 for a little more than that in good condition though.

beerslurpy 07-03-2007 06:11 AM

Actually the v8s get better highway mileage due to gearing. I considered an rx8 at one point except for the little issue of it being as slow as a stock miata and the horrible gas mileage.

Crimson 07-05-2007 11:38 PM


Originally Posted by cjernigan (Post 128209)
Good luck finding one for $100.
You could get a SR20 T25 for a little more than that in good condition though.

Yeah, I know :( Realistically I'm looking at using a T-28 now. Relatively cheap and easy to find, and BEGi has a manifold for it for $400.

Slidin'Miata916 07-06-2007 11:35 AM


Originally Posted by beerslurpy (Post 128315)
Actually the v8s get better highway mileage due to gearing. I considered an rx8 at one point except for the little issue of it being as slow as a stock miata and the horrible gas mileage.

Lmfao..... Rx8's Run like high 14's stock.....Stock miatas run like what, 17-18's? Your nuts...And one of my 5.0's got about 17 I think highway, built world class tranny with shortened gearing, and a 373 rear end. It sucked haha but got anything out of the whole..

lazzer408 07-06-2007 05:46 PM

I used that little IHI turbo the ford probe uses. One of them was $75 and another was $100 at the junkyards and that came with all the lines including a bucket of hoses I grabbed off the probes IC setup. The IC itself was $20 more and I'm still running that IC but I've upgraded to a T3 now.

Like this.
http://cgi.ebay.com/ebaymotors/rhb5-...spagenameZWDVW

Or maybe this will cram into a Miata. =)
http://cgi.ebay.com/ebaymotors/88-89...spagenameZWDVW


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