Hi guys,

I need some help tuning my HS6 1 3/4" draw through turbo setup. I have read so much general info but I can find any real answers. "just file the needle" tends to be the general comment

Im chasing the following:

1) Does the standard a series mech pump supply adequate flow for this setup? I know pressure is ok but will it refill the fuel bowl fast enough

2) what dash pot oil is recommended? I understand/believe heavier oil richens the mixture. I have proper SU oil 20w is that recommended?

3) what colour dash pot spring?

4) what needle profile code have people used as a start point then refined?

5) Did you use standard size main jet? And do you/did you adjust AFRs with the nut underside or set the main jet at the old school recommended 2 turns out then refine the needle profile?

Thanks in advance. These questions will help other draw through turbo guys. If I get this running right I will post a proper full log of the exact items and settings I used to help others if they are going down this path. There are so many things that arent mentioned in detail when doing the draw through a series turbo that would have helped me heaps if I had known at the start. :)