toddk911

Factory Specifications


RSBarn.com
3.0 litre, 4 cylinder, turbo

104 mm

88 mm

8v (2 / Cylinder)

337 @ 5400 (ADAC GT)

350 @ 5400 (Le Mans)

369 lb ft (500 nm) @ 3000 <-----------????

98 Octane

10J x 18"

11J x 18"

265/630 slicks

305/650 slicks

6 Speed rear differential

2976 lbs (1350 kg)

Matter

0-100khm 4.4 seconds

228,000 dm


So this made full 370 tq at 3,000 rpm????????? So full boost at like 2,200-2,500 rpm?????

Anyone know what boost levels they would have ran at?

ninefiveone

at the wheels or at the flywheel?

inactiveuser92616

that boost at 3000 rpm was done with slow loading on a dyno, on the road it is quite possible you would be past 3000rpm in lower gears before boost hit.

RajDatta

Its actually an orginal turbo S which was converted to RS spec. Its a full tilt race car.
Raj

whakiewes

Raj,

Petes 968 was an original S? Thats pretty impressive considering the rarity of the Turbo S's, let alone the (4) RS's. Can you comment on the torque figures since your car is very similar to Turbo S spec?

Wes

RolexNJ

Raj: In your best estimate, if I may ask, what would the total cost to emulate/build the red RS 986 race car? The total ball of wax, with all the best goodies iof today including the car itself?

Porschefile

That doesn't mean they were necessarily loading it up on a dyno. Most likely that's a fwhp figure as I've only ever seen Porsche publish fwhp figures. As a fwhp figure that's not unrealistic at all, especially for a 3.0l i4! There are lots of other things that could cause torque like that. It's possible they could have spiked the boost and tapered it back down much like many newer cars are setup from the factory, though I haven't ever heard of Porsche doing that on the 968 Turbos so I doubt it. At 337fwhp and 369fwtq, that's around ~290rwhp and ~320rwtq. That's not too far off from what I've seen with bolt-on 26/8's on a 2.5l so it doesn't sound that crazy to me considering the extra .5l. Hopefully Konstantin or someone else more knowledgeable about these cars will respond.

RajDatta

I would say easily over $125K to replicate the red turbo RS that Lindsey has had at its website. That is if you could even find some of those bits and pieces.
Wes, my car has a different head. I have a 2.7 Head which is what Chris Cervelli used because he found 40 additional hp by the swap. Pete stuck with the original turbo S head. I am not sure what the numbers would be but it would be safe to assume with his head would make the 369 lbs/ft of torque as stated. A little blast from the past...

https://rennlist.com/forums/showthre...ght=turbo+head
https://rennlist.com/forums/showthre...ght=turbo+head

Pretty much what Pete told me as well. His car makes max power under 6K and the torque is hard to manage.
Raj

special tool

500 NM is NOTHING for that engine - it could run a 1 year enduro and never heat up the engine oil.

RolexNJ

Thanks Raj, I remember the car Lindsey had, and it was stunning to say the least.

Tool: Go blow smoke up your butt! Go and make your 600 RWHP already!

RajDatta

Remember, the exhaust ports on the turbo RS were purposely built real small to enchance torque at low rpm. They were limited to the amount of hp they could make. Now imagine if you did the same magic you do on your engine to that engine. Now we are talking..

Raj

special tool

I agree - I would look for 700 FT/LBS from a 968 turbo on overboost.

special tool

I would suggest that you go with your thought of changing that turbo.

Porschefile

I concur!

RS Barn, you might want to consider doing something similar to Lindsey's steam vent kit Link What type of heating problems are you having? Headgasket issues or just coolant overheating? What Lindsey describes on their site seems to be a typical issue with lots of inline motors in general. There are some Nissan i4's and i6's (and quite a few other inline motors I can think of) that actually have this exact same problem, and the mod that Lindsey did is usually a standard mod many people perform on those Nissan race engines (sometimes they get a bit more detailed).

toddk911

Ok. But doesn't them mean that if peak tq was at 3,000rpm boost full boost was much sooner than 3,000???