13b 20b
 

Hi all
Im new
we have in Kuwait just 3 rx7
what is the best 13b or 20b
And from which model thare is?

also
I saw in the internet 2 kind of intake one without anything
and the second write on the top (3rotor)
what is the best please ????
m5_q8@hotmail.com

Use the Search button. 20b install would be nice but very costly unless you can weld and fabricate yourself...

Jay7...

Obviously, a 20B would be better than a 13B. The bigger number is alway better right? ;) However, it's not a cheap conversion to install a 20B into an RX-7. The engine was never made for the car, thus requires quite a bit of customizations to complete.

Probably about the cheapest I've seen the conversion done for (i.e. having a shop do all the work) is around $20,000 USD.

The intake manifold labeled '3 ROTOR' is the stock manifold for the 20B. I believe most 20B installations use that manifold. Just count the intake runners - a 13b will use 4 runners, and a 20B will use 6.

I suggest you read the FAQ thread stickied here in this section, and alse the FAQ thread stickied in the 20B section. https://www.rx7club.com/forum/showthread.php?t=68640

Doing a 20B conversion is a substantial project, requiring time/money/experience. It involves buying/building several major components (engine, cradle, turbo, ecu), but most of the work goes into integrating them to make a streetable car. Most FD owners never seriously consider a 20B.

Dave

or you could go with itb's..um yeh i've seen a couple 20b's like that

Ok , 20b from which car ???
what is the relation between cusco and 20b?

20b from eunos cosmo, the JC.
That is the fourth gen. and was produced from februar 90- september 95

god luck
Joachim

I understand now ...
do you know something my friends rx7 is stoped from 1996 to now because he didn't know
any body can repair his car ,
I will buy it if he give it to me as 1800$
ok
OR I will give him some kit from e39 M5 I have :
-instrument cluster .
-brake calliper.
-swaybar
etc,,,
ok or not???

What year is your friends rx7? it might be a good deal.