have a 1990 porsche 964 with twin turbo engine in it the front need sot be lowered quite abit
as you can see in the pic

i turned the coil overs a fair bit but no change is there a diff way to do it

[IMG]local://upfiles/6347/43279328C89043CFB39A530BA713EF74.jpg[/IMG]

 

Lord, what sized rims are those? The only good way to properly lower the car is to install a set of coilovers. The factory units only have so much adjustment. It appears your rim choice might be a limiting factor as well, Porsche does not recommend over an 18" wheel on a 964.

 

they are 19" tires on rear are 300-30-19"

car has factory coil overs but doesnt seem to help lower the car at all

 

Yes, they are a type of coilover system, but are limited with adjustment due to the spring rate. If you want to lower the car, you need to go to lower springs, or a coilover system.