blade7

Reading about 3.0 engines going pop makes me wonder if despite being an improved design a standard 2.7/3.0 block isn't quite as robust as the original 2.5 turbo block ? Going 3.0 turbo isn't cheap so I'd hope the extra stroke/500cc would yield 15% more power and torque above a similar spec 2.5, but does that come of the expense of reduced engine life ?

Thom

Mine has clocked 33k miles, now in its 5th year and doesn't drink a drop of oil. Road car.

blade7

I seem to recall you posting the 3.0 block heats up quicker and you have uprated the oil cooler, are you using an original turbo water radiator ?

RajDatta

How many people actually keep a 3.0 liter engine within modest boost range? I am sure if the engine was built to make 20% more power than a 951 engine, it would last just as long. Unfortunately, most push the envelope.

V2Rocket

if you weren't going for max-effort power that would be an awesome cruiser/bruiser. probably just wring out a K26/8.

3.0L, 300hp, 300ftlbs. square torque curve.

blade7

I would be one of those people . 16-18lbs would be my boost limit. I doubt I'd get to 50k on a 3.0 but I'd like to drive it hard without it breaking. 400/440 would be enough.

RajDatta

Actually, how about 305hp and 369lbs/ft of torque. That is what a 968 turbo is on .8bar.

RajDatta

But the factory cars typically run .8bar. So to be fair, if you want factory longevity, you can get around 350/350 all day because of the better 2.7 head. Add another .2-.4bar and your numbers are very achievable. Just keep in mind, it's no longer factory boost level, so longevity will be compromise somewhat to maybe 100k? Lol

blade7

I've had my car 6 years and done around 13k in it, I'd be 100 years old by the time a 3.0 engine was worn out

odurandina

198 k miles and almost no oil burn and no noticeable loss of power.

the guy who got my engine is going to add boost and prolly enjoy it another 200 k miles.

blade7

What pistons and bores does that engine have ?

odurandina

the 968 3.0 has a 4.095" bore and 3.465" stroke.

pistons? "oh man, I only, ride 'em.... I dunno what makes 'em work."

www.youtube.com/watch?v=f5cL-h3Pj1o

Paulyy

Not sure what planet you're on. But the k26/8 is just way to small for a 3L.


Personally if i wanted a street 3L to last a long time.
16v head with varocam
9:1 or 9.5:1 compression ratio
wossner pistons & carrillo rods..
factory bores.
would go custom plenum
modified 951 headers
GT or GTX 3076R. .82 turbine housing.

probably aim for 320-350 rwhp and you'll get that with low boost.


Just remember you won't always be on full boost and full rpm.

fejjj

I had this conversation with Chris White and he told me that the longevity of these engines is great running up to 15psi.

Dougs951S

What was the factory turbo for the 968T's? That's a lot of torque, more than a k26 would be capable of making. I'm guessing they ran a k27/8?