Originally Posted by frayed

- lag until rpms rise. this is annoying but not a huge deal if you keep rpms up
- lag even at high rpm, as you breathe off throttle and get back on under hard charging

It is the latter, the rubber band response that has me more concerned actually.

Originally Posted by nathanUK '81 930 G50

The WRC cars have single turbos and use ALS (Anti Lag Systems). Basically these inject fuel into the turbocharger and alter ignition timing to keep the turbo spinning (even at idle!). You could pay to have this done to your car but you would also have to have your turbo "refreshed" once a year

EDIT: I just googled it and it says it is very hard on the exhaust

http://www.innovativeturbo.com/pages...l=team&sl=tech

http://www.rallycars.com/Cars/bangbang.html

Originally Posted by Ag02M5

That is good to hear considering I am in the process of installing them. Did he have camber plates as well? I am going to try it out with the stock rubber mounts first.

Originally Posted by cobalt

IIRC correctly Porsche used to use the air recirculation pump and fed it to the turbo to keep it spinning to reduce lag on the 964 turbo race cars.

Originally Posted by cobalt

IIRC correctly Porsche used to use the air recirculation pump and fed it to the turbo to keep it spinning to reduce lag on the 964 turbo race cars.

Originally Posted by cobalt

I don't have any specifics other than they did this with the IMSA "Supercar" championship 3.3's and 3.6's

Apparently they somehow kept the fuel injection active on overrun and firing it into the exhaust ports with the help of the air provided from the air pump. This would take place whenever the driver would lift and would keep the turbo spinning at a high speed.

Major down side is fuel consumption goes from bad to nil. Doesn't sound all that safe to me either.

Originally Posted by Geoffrey

I have a lot of street and track experience with turbo cars, and for a street car, the 965 suspension is a noticable upgrade from the older platform. While still simple ie trailing arm rear, it is more compliant and provides for better handling. When compared to a 993 suspension, it really depends. There are a number of 993s that have been lowered too much which causes some significant problems at the rear end with rear bump steer where the rear will toe out. If you upgrade the dampers and springs on a 965, you'll notice a large difference from stock, and a significantly large difference over the 930. You will not notice a significant difference between a 965 and a 993. In my opinion, the Bilstein sport and HR Red springs are a very nice street package and would recommend them over the PSS-9s.

On the track, again, I think the 965 rear suspension is simplier than the 993 and is not as affected by alignment issues (or out of alignment issues) than a 993. Bottom line is that you can't go wrong with either, however, the awd of the 993 turbo dumbs the car down too much (my opinion).

Originally Posted by JBH

Are you interested in the car for track, street or both?

There are quite a few guys around that drove these cars in PCA racing with pretty good success. Many owners start the suspension modification with heavier springs - that takes care of both ride height and softness in the suspension. Springs are pretty cheap and can be tuned to your intended use. This is a big advantage of the 964 suspension.

There are also a number of very good damper choices, selected according to your intended use.

Is a 964T suspension better tha a 930...that is probably debatable. I know a lot of really fast 930s, but in general I would say yes, but the difference is not a lot. After all, it's still a trailing arm rear setup and by today's standards, it's antiquated.

What I don't like about the 965 is the power steering. Jumping from my Caterham to the 964T, the difference is night and day. In comparison, the Porsche steering is not very responsive

I wonder, has anyone converted to a standard, unassisted rack & pinion? I imagine that's a big project.

Originally Posted by 38D

So anyone that says the 965 is antiquated and is unstable is just an idiot and can't drive.