Kcpaz, wise words.
You have already walked down the cross platform conversion path so you know first hand that it is a LOT more complicated than it looks. 1000 little details that make you nuts. It is doable though and I expect Scott will be ready by the end of the year on this.

I would worry about the Boxster S transmission handling 450hp+ on a long term basis. A better choice would be a 996 Turbo transmission. Hey, no one said this was going to be easy.

But you have to ask yourself, why on earth do you need a Boxster that makes more than 450hp? These cars are not meant for drag racing. I can tell you from experience that 400 whp through a Boxster S G86/20 transaxle is very reliable and I will be raising the power soon to see what it can take.

The biggest problem I have with the V8 idea is the low end torque. THIS is what will kill the transaxle more than horsepower. That and driving style... which I think goes hand-in-hand with people who want V8's in their light weight, mid-engine Porsches (broad generalization I know)

I've already proved that the Subaru combination is reliable on a track car, and we are currently working on two street car conversions to prove that the concept works with all of the creature comforts like A/C, a full interior, mechanical power steering, and an air/water intercooler set-up that doesn't require the ridiculous roof scoop.

I have to laugh Kpaz, you ask him why he needs that kind of rear wheel HP then go onto to say you plan on putting more than 400 on your own car.

I noticed that also!

I think the desire for big power is one of those areas where " if you have to ask, you'll never understand".

Time to get out of the 90s.....

Indeed. I've actually taken a ride with Scott in this very car. It's got the LS-2 making about 400 hp. Well short of what you can do with an LS-7. Believe me, it was AMAZING! If I wasn't in CA, i'd be doing this in a heartbeat. It's about $5k for the complete conversion kit plus whatever LS crate motor you want to put in there (figure a nice LS-3 making 485 HP is about $15k).

You get all the benefits of a beautifully handling car, with the power to make it competitive at a very high level on track days. The weight difference is nominal, so it's like just adding pure power to your Boxster S.

Here is the latest video, btw:

Renegade V8 Boxster S Review - YouTube

I know this is an OLD thread, but any updates or additional info ?
I asked Scott @ Renegade about a 987 kit, and while he said it should work, has anybody done a 987 ?
I am basing my purchase of a Boxster on this LS swap, I prefer the 987, but ???

Hi RichInCanada,

no detailed infos about a 987 Renegade v8 conversion, but i would recommend this thread about a 986 Renegade v8 conversion: http://986forum.com/forums/show-tell-gallery/54328-boxsterls376-introduction-ls3-conversion.html

Regards, Markus

Thanks man, informative read, sounds like he'd be the guy to do it !
Just wonder if a 987 is do-able, maybe I'll PM him...