badass951

Hahaha! Yes, I know I am a huge ***** for having a fully built 951, but at the same time I promise if anyone saw my plans for how I approached it they would have done the same. And oh yeah, I am on my way to UTI to learn automotive technology. Then I will be more of a hands on guy.

Shutemup

After being influenced by recent events........damn a LS1 drop in kit.......would hook you up for a reasonable price

why turbo something to make 350 hp when you can do it N/A with a swap.......and then hit over 500 with a blower ect?

porscheracing

in germany, we also have a few 3.0l turbos running...
although the 2.8l conversion is much easier/cheaper and done more often! (if you could speak of "often" at all)

AznDrgn

I've heard an easy way to make a 400HP 3.0L turbo is to take a 2.7L motor and use an S2 crank which gets you a 3.0L 8V motor.

inactiveuser92616

thats an interesting approach. If I ever do it personally I want 16 valves, but thats me. 8 valvers get the job done.

porscheracing

even porsche chose the 8valve head at the 968ts...

Danno

"I've been told there were production 951s as early as 1985 but in Europe only, but I've never had that confirmed or seen a picture of one."

I've heard info about these cars from various people who've had contact with one. The early '85 Turbos had the older square dash, the steel suspension with single-piston calipers. They had 15" PhoneDials. Then there was a major iron-workers strike that shut down the automobile industry for months. When the production lines finally started up again, the Turbo had been redesigned as the '86 model we see today.

"powerhaus does a 968 turbo motor but it is ungodly expensive."

They also have a very interesting dyno-chart on their sight comparing the same 3.0L engine with 2V vs. 4V heads. Both got about the same max-torque, but max-HP was +100hp on the 4V heads. Both engines had K29 turbos and ran the same boost.

Blue S2

PowerHaus also does the S2 motors Turbo, not just the 968. There are one or two of those monsters here on the boards. Its expensive. Real expensive. You surpass 500hp & TQ quite comfortably though.

Ide love to get a second S2 and do just that one day!

Dilberto

Author Michael Cotton (Porsche 924/944/968 Book )has documented that the factory produced about 30 968 TurboRS/S models, that employed the 3.0L closed-deck block, and head. The engine used the 8V cam cover however, as Porsche stated a 16V turbo is overkill. At a stock 305hp- the motor has the intake runner shortened with a custom-fabricated velocity stack- fed via a NACA duct directly above the VS. I want to modify my stock one too.

Danno

Personally, I wouldn't bother with that NACA duct and velocity-stack intake going to the airbox. But if you want to try it, I'll pay for before & after dyno runs.

The real reason Porsche went with a 8v head on the 968 TurboRS was the rules which limited power to 340bhp. They configured the engine to get as much torque as possible for maximum acceleration. Using an 8v head compared to 16v gives much better low-end torque and they even narrowed down the exhaust ports by quite a bit to get even more low-end torque while sacrificicing high-RPM power.

If the rules allowed it, they probably would've gone with the 16v head like on the 410hp 944GTP car that won LeMans. But in a 968 configured the same way, now we're talking about 500bhp+!

Also the 3-ltr blocks really aren't closed-deck, they have exposed cylinder tops just like the 2.5-ltr blocks. Just that the floor of the block has been raised about 2" so that it supports the middle of the cylinders instead of the bottoms. But that should substantially increase the rigidity of the cylinders, along with beefing up the external ribbing on the block too.