Turbo 914

[jpnovak]

In a previous thread Cole asked me to post about my turbo 914.

Well It's not a 930. And. Its not 911 based. But it is a Porsche. It does not have a flat six. It does have a flat four.

Twin turbo's make up for changes against the Marque.

So... Here is the build.

Subaru EJ20R JDM twin turbo.
98-99 Subaru GC8/Impreza 5sp transmission.
Custom cable shift running Nissan Versa shift column (amazing shifter placement)
Megasquirt EFI with custom tune based on STi Ver8 tables.
~1920# with close to 300HP. Yeah, take that.

Everything is garage built to comply with rules of the $2011 GRM Challenge. I went in 2011 and blew the motor so I finished dead last. I will go back this year and will have a whole year to sort the car. The new motor is running well. I plan to kick ass and take names this year.

There are several things I would love to do to change the build or add performance but I can not to stay within the budget and the rules.

Goes Fast... Scares Weak Minded People... Get's lots of compliments.... Handling? Well I have not explored the limits yet. TBD.

A few pictures for those who like a visual.

[Tippy]

Very cool Jamie! I wanna ride.

[copbait73]

Ok, I'm looking at the right bank turbo.
I see a small canister with single nipple which I assume to be the wastegate. Next to that is a much larger canister. What is its function?
That CAC inlet needs a tall F1 type snorkle.

[jpnovak]

Marty,

The small canister is the integral wastegate. The large one is a vacuum diaphram that would "sequentially" open the exhaust cut-out on the second turbo and add boost. I have deactivated it by welding it in the open position and keeping both turbos to spool together.

[copbait73]

Originally Posted by jpnovak

Marty,

The small canister is the integral wastegate. The large one is a vacuum diaphram that would "sequentially" open the exhaust cut-out on the second turbo and add boost. I have deactivated it by welding it in the open position and keeping both turbos to spool together.

Wow, sequential, I'm impressed. Are both turbos the same aero configuration?

[jpnovak]

Yes, they are both really small. probably close in total overall flow of a single turbo factory setup (TD04).

I know the system operates with pressure to open a butterfly valve in the exhaust. Most of the Subaru guys say to just leave it open permanently - and so I welded it open.

[IMR-Merlin]

I thought about doing a Subi motor 914 if I ever get the current project done. I am also thinking about an Audi powered 2.7T mid engine 911 too..

Nice car and build!!!

[totle]

Jamie, thanks for sharing :-)
In the box of weather I should boost my 914 or not :-)
As a turbo guy, that might be the way to go :-)

[cole930]

Jamie:

Just way way cool !!!!!!! Thanks so much for posting. Killer car !!!!!


Cole

[crimson ghost]

Care to share info on how you got the Subi trans to work cheaply in your car ???? I know of the pricey ring gear flip but hoped you had something better.
I have a JDM EJ20 to go into my 58 Karmann Ghia. I'd rather not use the built VW trans and have a 5th gear.
Thanks

[jpnovak]

Build thread.

914World.com - A Porsche 914 Community / Forum / Club

AWD-2WD conversion

914World.com - A Porsche 914 Community / Forum / Club

There is no easy way to make the Subaru transmission work in the Ghia. Only a reverse ring and pinion will work. These are pricey.

[crimson ghost]

Thanks