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-   -   12A turbo? (https://www.rx7club.com/new-member-rx-7-technical-256/12a-turbo-990390/)

ls63 03-07-12 09:48 PM

12A turbo?
 
I have been toying with putting a turbo on my 7, but i have a 12a. How much power out put can i get with a turbo 12a, what kind of options are there?

Aaron Cake 03-10-12 10:55 AM

There are no options that bolt on, other than the factory turbo 12A stuff (almost impossible to find).

What are your power goals? Budget? Skill level?

On an unopened engine you can make some fairly decent power, but the stock ports are very small. So figure 200HP before you need to open it up and port.

ls63 03-10-12 05:50 PM

200 hp is perfect, i really do not know how to achieve that from a 12a, my skill level is low...but i learn quick

Boriquaguerrero 03-10-12 07:25 PM

mine dyno 337 WHP

Aaron Cake 03-11-12 10:55 AM


Originally Posted by ls63 (Post 11012230)
200 hp is perfect, i really do not know how to achieve that from a 12a, my skill level is low...but i learn quick

If all you are looking for is 200HP, then use the stock turbo from the TII. You can make an adapter to mount it onto the slightly shorter 12A block.

The real issue is the fuel system. Carbureted turbo cars suck (just trust me on this) so you're going to want to go EFI. But there aren't any bolt on systems, so you'll have to make your own. Once you have modified a 12A manifold to accept fuel injectors, you could use the EFI system from the 2nd gen TII and it would run the engine acceptably. But really, a standalone is the way to go.


Originally Posted by boriquaguerrero (Post 11012319)
mine dyno 337 WHP

Bridgeport, T72, low compression rotors, etc. Bit of a different case than the OP.

Joselo 03-11-12 09:30 PM

There are companies out there selling adapter plates to use 13b intakes on 12a engine that shoud help if you want to run efi. If you want to use carb weber, boost prep Holley or Barry grant sells a boost prep carb that u can use with a RB intake. 200 hp is a pretty achievable goal.

ls63 03-18-12 07:46 AM

Ok cool, ill see what i can do

Aaron Cake 03-18-12 10:02 AM

The problem with carbs is that you'll blow several engines trying to get it right, and you'll have to do something silly like a locked dizzy to keep timing under control. Why build the car like it would have been done in the 1930s?


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