I agree, I'd buy chris's manifold, su's don't cost to much I bought mine new old stock $75 plus post, t25 of a rb26dett is a good size and you can find some with carbon seals fitted standed or get one rebuilt with steel wheels which means u can run more boost, water/meth is also a good cooling agent if you look at cooling mist's web site they have many available, there are a few other things like oil/water lines, throttle cable pending on how u mount carbi and where, the small things add up, mine cost around $1500~1700 to get all the bits and get it going but still needed a tune but parts are easy to get for su's there's heaps of info if you google draw through setup's and learn along the way

I don't think anyone answered this, on a draw through you don't need a BOV.

A blow off valve is to prevent surge in the turbo as a result of rapidly closing the throttle when it's after the turbo. Think of it as letting the pressure between the turbo and throttle go. On a draw through set up this doesn't happen so you don't need it.

If I remember right F1 turbo cars had the throttle upstream of the turbo to help reduce lag. This comes at the expense of drivability.

If you want to wind up the boost using water injection to prevent knock, straight water has the biggest cooling effect (2.26MJ/kg) and it's cheap at around $1 per 1000L. A good rule of thumb is water flow should be ~70% of fuel flow. If you're using a set flow rate match it at the point where the turbo's started full boost (~3000rpm depending on the turbo).

Okay thanks, im only new to it, i stuffed the 3rd piston so we are rebuilding it practically stock than just gunna turbo it, so i think we are gunna go t25 with stromberg carby?

I think the first thing to ask is how much do you want to spend? And how much do you want to spend on manifolds?

Thanks for all the plugs gents, very much appreciated.

$1500