To turbo a 968

[KS3]

Plumbing and placement aside what would be the best turbo, new or off a car, to run on a 968 with low boost (5-8lbs)?

[Paulyy]

Garret T-26 ball bearing turbo,

but really it's really what you like

[Techno Duck]

Tons of options. You need to decide if you want big power or quick spool. Also if you want to keep the triple-k flange or not. Going to a more generic T4 opens many more options.

Depending how you build this, you can go for much higher boost (15psi) which will yield better returns than keeping high compression and running low boost.

[flash968]

there are a lot of guys who have tried to turbo a 968 - so far, i have not seen or heard of a single success story when it comes to anything close to reliable or streetable - they all seem to be incomplete, and needing "a bit more tuning" - they all seem to either run hot, idle oddly, start hard, run rich, or some such thing - it's pretty easy to get big numbers and make it work on the track, but much harder to make it work in widely varying environments like the street

i think the problem is the combination of the large cylinders and the high boost they are seeking

a low boost system would probably work - the factory did it - targeting somewhere SOUTH of 330hp would be the key - the factory did 305 for a very real number of reasons - everybody in the aftermarket world keeps trying to get the big numbers at the sacrifice of actually being able to drive the car

as for which unit to use, as stated, that comes down to where you want the boost to come on - personally i would choose one that made it come on very early and leveled out more

but that is also one of the reasons why i chose a centrifugal supercharger instead of a turbo

[Damian in NJ]

Originally Posted by KS3

Plumbing and placement aside what would be the best turbo, new or off a car, to run on a 968 with low boost (5-8lbs)?

Powerhaus in Arizona, Heritage in Florida have built reliable, well engineered Turbo conversions. Fitzgerald Racing in Australia has delivered at least half a dozen Turbo S replica cars. I also know several 'home built' conversions that were very well done. And if you're looking for low boost power, consider 928 Engineering's new supercharger kit. It uses the top supercharger choice, the Raptor from Australia.

Porsche didn't choose to limit the Turbo S to 305hp, that was the limit given to run in the ADAC series. And they made monster 369 ft/lb of torque, at 3,000 rpm.

[Joel8005]

What about RSBARN........Have they not done a few turbo conversions?

[flash968]

they certainly do know a lot about turbocharging the 4 cylinder - pete even used to drive for rothman in the turbo cup series - they have dealt with countless 951s - they also have one of the Turbo S cars that is set now up like an RS (it was originally intended as a backup car for Le Mans)

they have not really gotten into 968 turbo conversions, as there really has not been a lot of demand for it as yet - with the car prices falling so fast, this may soon change - they also won't jump into something when they know that the result is not what the customer is going to expect or want, and they feel that too many people will try to achieve something that is beyond the ability of the technology or budget to properly manage, and only end up being disappointed (this likely explains why so many conversions end up being sold)

[Damian in NJ]

Originally Posted by flash968

they certainly do know a lot about turbocharging the 4 cylinder - pete even used to drive for rothman in the turbo cup series - they have dealt with countless 951s - they also have one of the Turbo S cars that is set now up like an RS (it was originally intended as a backup car for Le Mans)

they have not really gotten into 968 turbo conversions, as there really has not been a lot of demand for it as yet - with the car prices falling so fast, this may soon change - they also won't jump into something when they know that the result is not what the customer is going to expect or want, and they feel that too many people will try to achieve something that is beyond the ability of the technology or budget to properly manage, and only end up being disappointed (this likely explains why so many conversions end up being sold)

lol maybe you should come clean you are a sub vendor to rsb?

[flash968]

there is no "coming clean" to be done - i'm not hiding anything - it's no secret

it's irrelevant, but yes, i design and manufacture products that fit the 968 and the 944 and sell them to RSB - i have not mentioned it here because i am not an advertiser here - it would not have been appropriate to discuss here that we sell:

a short shift kit that sells for under $100 and uses the factory knob

a lower suspension brace that sells for well under $200

a bolt in, no drilling or welding DE harness bar/chassis brace (looks like a roll bar) that fits the hardtop cars and one that fits the cabs

there - is that better?

[968turboS]

Originally Posted by flash968

they certainly do know a lot about turbocharging the 4 cylinder - pete even used to drive for rothman in the turbo cup series - they have dealt with countless 951s - they also have one of the Turbo S cars that is set now up like an RS (it was originally intended as a backup car for Le Mans)

they have not really gotten into 968 turbo conversions, as there really has not been a lot of demand for it as yet - with the car prices falling so fast, this may soon change - they also won't jump into something when they know that the result is not what the customer is going to expect or want, and they feel that too many people will try to achieve something that is beyond the ability of the technology or budget to properly manage, and only end up being disappointed (this likely explains why so many conversions end up being sold)

Hmmm, if that is the case, why do they promote turbo conversions?

RS BARN: Performance Parts & Engineering

You have obviously made it very clear their stance on turbo-charging a 968. To post pictures of a factory 968 turbo and taunt it as a service you provide, is quite misleading. If anything, Pete used Precision Motorsports to get that car to run. It was beyond Pete's capabilities to get that thing to run.

Raj

[flash968]

their website is very out of date, and many things need to be changed - to my knowledge they are not involved in other turbo conversions, but it would be better to contact them directly - they may or may not be continuing in the path that was set when they began the restoration of that car, which intended to provide that service for other cars - like any new business, when you first set it up you shotgun all the possibilities - then you fine tune your marketing and scope of business - he did that years ago as well, and has been too busy providing the best 968 service and 968 specific performance products in the country to work on the website

pete has had very limited involvement with precision over the last few years - to my knowledge they were not particularly involved in the restoration of that car, though they were involved in the wiring - again, contacting him directly would be the better way of finding out exactly how much

i have had a number of conversations with pete about that car, and an article about it is about to come out as well - it has quite a history - it is still seeing development too, as new and better things become available

[Damian in NJ]

Originally Posted by flash968

they certainly do know a lot about turbocharging the 4 cylinder - pete even used to drive for rothman in the turbo cup series - they have dealt with countless 951s - they also have one of the Turbo S cars that is set now up like an RS (it was originally intended as a backup car for Le Mans)

they have not really gotten into 968 turbo conversions, as there really has not been a lot of demand for it as yet - with the car prices falling so fast, this may soon change - they also won't jump into something when they know that the result is not what the customer is going to expect or want, and they feel that too many people will try to achieve something that is beyond the ability of the technology or budget to properly manage, and only end up being disappointed (this likely explains why so many conversions end up being sold)

Pete drove for Rothmans in the Rothmans Turbo Cup series? Gee, the 2004 six page Excellence article about the Turbo Cup car he bought in 1999 didn't mention that fact, and in the article they sought out two drivers who did race in the series for comments on racing in period. Do note the Precision Motorsports signage on that car, we know who prepped that car after all.

http://www.ddurrelltech.com/pcar/exl/Excellence_Dec_2004_944_Turbo_Cup.pdf

[flash968]

ok - my bad - he drove and owned the rothman car - that doesn't change a thing

[Damian in NJ]

Originally Posted by flash968

ok - my bad - he drove and owned the rothman car - that doesn't change a thing

How do you make all this stuff up, lol.

[flash968]

i didn't make up anything

[Damian in NJ]

Originally Posted by flash968

i didn't make up anything

Saying Rothmans hired him to run a car in the Canadian 944 Turbo Cup series, when he bought his Turbo Cup car nine years after the series ended? How do you fabricate that out of thin air? You're a co-owner of a business with the guy, and I'm sure you talk all the time. That Turbo Cup series had some pretty good drivers-future world champion Jacques Villenueve, Scott Goodyear among others. Creating a false racing record for someone is a pretty strong misrepresentation, in an attempt to validate his business.

[flash968]

you see conspiracy everywhere when there is none

i drew an incorrect conclusion from the one conversation we had about that car, and the photo of it - i presumed that all markings would be removed when the car was sold, as they are a part of sponsorship agreements - outside vintage class, that is how it is done - pete said he used to run that car - the photos showed the sponsors - i put two and two together and came up with a duck

it was no more that that - i will ask him why the markings were not removed

i draw conclusions like that all the time - once in a while they are wrong - i tend to assume that people do what they say they are going to do, and do things properly - it's just like when you said you were having this bang zoom engine put in your car - i presume that it is now done, and it's a true rocket - or were you just making that up?

but it's always nice to see you take yet another thread way off topic and turn it into yet another personal attack that has no merit in fact or truth

[Damian in NJ]

Originally Posted by flash968

you see conspiracy everywhere when there is none

i drew an incorrect conclusion from the one conversation we had about that car, and the photo of it - i presumed that all markings would be removed when the car was sold, as they are a part of sponsorship agreements - outside vintage class, that is how it is done - pete said he used to run that car - the photos showed the sponsors - i put two and two together and came up with a duck

it was no more that that - i will ask him why the markings were not removed

i draw conclusions like that all the time - once in a while they are wrong - i tend to assume that people do what they say they are going to do, and do things properly - it's just like when you said you were having this bang zoom engine put in your car - i presume that it is now done, and it's a true rocket - or were you just making that up?

but it's always nice to see you take yet another thread way off topic and turn it into yet another personal attack that has no merit in fact or truth

Hilarious, as always. You make a incorrect attribution, get called and corrected on it, and I'm making a personal attack? And I postponed my Milledge headwork because I got a smoking deal on a Patek Phillipe watch that was too good to pass on; if I said I had it done and it wasn't true then you'd have a comparison, but I didn't, and you don't.

[flash968]

yeah, right - go with that - we all know the truth

[Damian in NJ]

Originally Posted by flash968

yeah, right - go with that - we all know the truth

'Who' is we, and 'what' is the truth, lol.