My other 1303 GL

[Steve C]

Low boost was about 22psi.

interesting point, same tune that was on rollers made 319 and on the hub 350, so just 1 psi of boost and more timing it made 32 rwkW more.

The waste gate is fully closed now at 31 psi so out of turbo which is what I wanted to achieve

[Steve C]

I've been running 245/40 x 18 Mickey Thompson ET streets, these were 2nd hand and pretty old and the side walls don't have a lot of give.

A local speed shop had a special on some M&H 245/55 x 15 drag radials.

There was no 15 inch Porsche factory wheel that would work because my wheel bolt face is pushed out a long way by my 944 trailing arms so I had a pair of 15x6 Cookie cutters widened on the inside to 8.25 inch to take these tyres. They worked out at ET 65.

My local tyre guy did a finger balance rather than a cone balance for me

[Wally]

Nice! I had the same done to a set of 5,5Jx 15 spare wheels towards 7,5J. Was meant for 24x8 drag tires full slick.
Let us know how you like those pls!

[Steve C]

Originally Posted by Wally

Nice! I had the same done to a set of 5,5Jx 15 spare wheels towards 7,5J. Was meant for 24x8 drag tires full slick.
Let us know how you like those pls!

they would have looked really cool.