Which engine? Subaru 2.5 STI/Subaru 3.0/Honda j35/ Honda k24, Building a weekend/track car, help me pick the engine Options

[rupert14]

I am trying to decide which engine to swap into my 914. In the past I put a honda J35 in a baja bug and it would roast 33" tires all day long. It was a great engine for a baja bug. I have a local shop that is pushing me toward a subaru 2.5L STI turbo motor. I have also read about very happy owners of 3.0 flat six suby engines in the 914. A buddy of mine that runs NASA has a k24 in his car that puts almost 250hp to the ground with just cams. The good part about the k24 is that it is light.

I plan to just use it as a fun weekend car and once a month or so on track here in AZ for HPDE4. I am currently running a 2001 BMW 330ci at the track but I also have a speck e30 and a few street e30's. I want to be around 300hp (stock J35 is 300hp/300tq) and I am ok swapping the trans if necessary. My trans was recently gone through at a Mr. Evil gathering and is a strong side shift.

I realize many of you have more experience than me with these engines so what is your vote? I will be adding a wide body and the fattest tires I can stuff in there.

1. Subaru 2.5 turbo STI motor
2. Subaru EZ30R 3.0 six
3. Honda j35 V6
4. Honda k24 inline 4

[ClayPerrine]

A Boxster engine won't fit in a 914 chassis. The valve covers hit the inboard ears for the suspension pivots.

Lots of the Boxster guys are putting Subaru motors in. They are cheaper than a replacement Boxster motor, they make more horsepower, and they are easier to service.

And because it is a flat six, they work with the factory Porsche ECU. You just have to change the sensors and the throttle body in the Subi motor for the Porsche ones.

[Chris914n6]

A Boxster engine won't fit in a 914 chassis. The valve covers hit the inboard ears for the suspension pivots.

I thought the issue was narrowed down to just the coil on plug, which could be replaced with a chevy LS coil?