Rx3SP 20B HP Project street car
 

Rene built 20B project street car.

This is the story of a Rx3SP transformed to a 20B monster street car.
This project was started late december to be transplanted from a 13B
to 20B,not only a 20B but a really radical high powered (almost full race)setup for the
street.This project was suppose to stay secret but pictures got out and the demand
was given to see more of this project.I have no choice but to show and tell from
now on.Here hare some pictures of the first stages of the project.There will be more
pictures as the Rx3SP gets closer to the finishing stages.As of this moment the Rx3
project is 75% finish.To top this off this is about the 3rd week from the start of the
project and it is about 75% done.My goal is to finish before the end of this month,
that is starting it and tuning the 20B.

This has been my job as a fabricator for the last 10years,i started working on my cars
and learned from it and now it has been a job applying all i know from racing experience to the costumers.Let me know what you people think, hope i get some good feedback. :)

Rx3 project
 

Here is the 20B engine bone stock when i got it,first picture
Here the engine stripped to the bone,2nd picture.
Here is the engine being before polishing and cleaning.

Rx3 project
 

Here are other picture of the engine put together (monster street port) and Pinned using the stud kit for the 20B.It took about a week to do the engine alone.1st picture

Here is the engine with the polish intake manifold (really good polisher guy)top and bottom polish.2nd picture

Here is the engine from another shot of all the intake part being put together.3rd picture.

Rx3 project
 

Here is the engine with the front cover and pulleys.1st picture

Here is the engine with the custom pan made by me(Rene Jr). 2nd picture

Here is the engine with the 2nd gen dizzy and coils on stand. 3rd picture

Looks like oversised studs?

Just curios, why not all of them?

What do the internals consist of? I'd like to know all of the pertinent details?

very nice work, I hope you have a good roll cage in that thing.

Rx3 project
 

Here is the 20B engine on the Rx3 for the first time. 1st picture

Here is a side view picture of the 20B engine. 2nd picture

Here is a front view of the 20B engine showing the pulleys. 3rd picture

The engine is a B series block, big street port, modified oiling,stock 20B engine
rotors with 2mm ianetti seals.

Microtech LT12 series with individual coils system.All bosh injectors all around.
custom fuel rails primary and secondary.

The 2 stock bolts where left there because they are really big in diameter stock,
and the stock thread vs the oversize thread are really close in diameter so i took
the chance of not cross threading the 20B iron,they are two different threads.

looken great so far

let me extend my kudos to you as well. just gorgeous - both the car and the motor. what turbo do you plan to strap to that thing?

Rx3 project
 

I am going with a nice big turbo,details tomorrow( if i don't get tied up).

oooohhh ... you suck! ;) suspense, eh? i guess you hold all the cards, so i'll stay tuned.

Which stud kit did you use or did you have your own made?

Looking incredible too BTW!!!

looks like a guru stub kit looks the goods though good luck with the build!!!

cheers dave

Rx3 project
 

Yes it is a Guru stud kit,But it takes alot of machine work to make them fit.
On the 20B there are about 5 extra long bolts that go through the entire
engine.You have the replace the stock short bolts.

Rx3 project
 

Here are some more pictures of last saturdays work.

On this picture you can see the custom made intake elbow i reconfigure from the stock piece.1st pic

This one you can see the Gilmer drive pulleys and the super polish alternators.2nd pic

This one is a picture of the front custom made motor mount that i hand fabricated from aluminum,this part is all hand polish (not chrome dipped).3rd pic

Here is a picture of the big frontmount intercooler,3" in and outlets,all bolted down
and snug in that front portion of the nose. 4th pic

This is a closeup of the huge custom front mount from the bottom of the Rx3. 5th pic

:worship:That's complete insanity!!! :bigeyes: Looks to be coming along pretty good. Nice and clean work RENE!

Nice work. I like what you did with the elbow. Are you using the stock air temp sensor? Mind sharing your source for polishing? -Mine is a lazy bastard (me).

Rx3 project
 

Yes i am using the stock air temp i left it on the bottom of the elbow so you can't
see it with all the bling.

There is a shop here local that does all the polishing for me,He polishes like a
a mirror,even on the cracks.

Do you have a resistance-temp curve for it?

Whadda ya gonna use for tires??? If they stick, whaddya gonna use for axles???

Rx3 project
 

We plan to use a ford 9" rear end with big disc brake setup.

The microtech system uses the stock mazda sensor to read the
air/water temp.The air temp sensor has a little wire with a resistor.

Rx3 project
 

Here is an update the Rx3 is 95% finish,just some wiring and that is it!!!
Hope to start up tomorrow,Sat 27.

This project is a new personal record for me, a complete swap with all custom
made parts in just under 4 weeks. :)

It took me 2 months to complete my 20B on my car when i started from nothing.

Awesome Rene. You da man. I guess that means you can do mine in 3 weeks. hehe

So did you get her fired up?

Rx3 project
 

I turned it over today with no igntion yet, just trying to prime the oil into
the engine . I am down to 3 wires on the wiring hope to start the engine up
before this thursday..

Nice work rene but it looks better in person all that detail and work that you are doing is worth the money the owner of the car is getting his money worth ...

That is going to be WICKED!

Great job. Can not wait to see more pictures.

Awesome :icon_tup:

I am very impressed. A sleeper like this cracks me up because it is sooo undercover.

Rx3 project
 

ITS ALIVE!!!! Man that sound was the best when it started right up.

I turned the key and it started like a champ.I let it run for 20 min and

no problems,no leaks or oil leaks like the mazdas do all the time just

a great moment of enjoing the sound.I cheated a little,couldn't wait

so i started the motor with no exhaust system just a big 4" down pipe. :Kill1:

I Reved the motor a couple times and whoaaa that tune was just on the

money.


I held on the pictures till the last moment, didn't want to spoil the last few

details to everyone.I will post up the new picture tomorrow WED 31, I will

test drive the Rx3 in the next few days until the weather settles a bit.

Videos will be posted soon, trying to upgrade my computer to download vidoes.

Sweeet! Congrats Rene. Can't wait for the pics and vid.

So is this one a keeper, or will it be for sale?

Speaking of the devil. Jerry and I were just talking about putting miles on that new motor. So I will be breaking it in. I may drive it to Guitarjunkie's funeral on Saturday...thats about a lil over 100 miles round trip between LA and IE. :)

Rx3 project
 

OK everybody here it is ,the completed Mazda Rx3SP with 20B powerplant fully installed and running. Finished at last , 4 weeks in total time.

Here is the picture of the header before installation(Notice the extra support for the Big turbo).1st&2nd picture

Picture of the engine bay with turbo installed. 3rd picture

Picture of the 4" down pipe,Thats righ 4 " all the way. 4th picture

Picture of the turbo(Big turbo like i said)Its only 88MM ball bearing from
turbonetics the Y2K88MM turbo MID Frame turbo about 42 lbs.5th picture

Holy shitballs that looks nice!

Rx3 project
 

Here are some more picture of the Rx3Sp 20B engine,

Another view of the engine with all the parts in its place. 1st picture

More of the engine bay and turbo.2nd pic

Here you can see the bottom of the Rx3 with the intercooler all plumbed up. 3rd pic

The aluminum radiator with twin shrouded fans(let the engine run 30min an only got up to 170F with no air pushing up front,when fans come on it drops to 156F)4th pic

Picture of the 4" Muffler and the turndown i welded up.5th pic

You can see the experience on these shots,THERE WAS NO CUTTING ON THE FIREWALL or TRANNY TUNNEL,just a few holes for the 3" intercooler pipes.

See ya at the upcoming shows,Jerry will take the car to carshows really soon
and some Rx meets for closeup view.


Enjoy the pictures more to come,Hopefully some vidoes too. :)

WOW! Looks amazing, congrats man. Eagerly awaiting the videos....

damn bro , that is awesome , how`s it drive?

Loving ever single pic of that!!!

awsome car!!!! that thing is gonna pull crazy hard..VIDS???

Rx3 project
 

Me and Jerry(car owner) took the Rx3 for a spin today ,and you know :lach:

we had a big smiles all the way.We drove a bit without the hood on for a couple

of blocks on street , when we pulled up to the gas station we had people just

coming up and taking a good look at what the hell is that nice chrome stuff.

We filled it up and took it into the freeway,I of course had to be the first to

drive,couldn't let jerry drive it till it was safe.I meant safe from being throttle

happy,you know, you can't just unleash the power to someone who has been

itching to feel the awsome power of the 20B.He was just saying "damn that

sound is so different".I also told jerry he has to take it easy from now on

the Rx3 felt really nice and crisp on the freeway . Thanks to the awsome tuner

you know (Rene JR):naughty: got it all right in the first try.



Hope you people like it, i can do the same work (for all rotaries) If anyone is

interested(It has to be by appointment,for this work,I do one car at a

time to keep myself focused :uhh: .More info of my shop PM me>

Good Work Rene!!

What did it cost Rene? Out the door exspense...

Great job Rene, yeah jerry called me when you guys was driving around. Cant wait to see the car this week end and take it out for a spin, I'm sure its wilder than it looks.

what sort of power are you expecting? i am still debating tubos...

estimated hp 800+,


Hey Wacky.....

Sinces you got Jerrys other 3 , I got dibs on his RX2.

Hmmmm.. not a bad idea. I will take the white 76 RX-3SP so I can have 3 RX-3's. :)

I'm gonna have to grace my presents @ Wack's house this weekend to drive this car.

- Hey Wacky how far RU from Jerry's??

Wackys not to far. I'm by his second best place besides the junk yard.. THE CASINO"S..