hi there people thought id ask a few questions. i have searched but could not find what i was looking for.

1st up a am looking for a vn to vr wagon. i am going top us this as a budget racer. budget is limited to $1200 for car and go fast bits.

plan is to use one of these NOS NITROUS SNIPER UNIVERSAL EFI WET KIT FOGGER SYSTEM | eBay

a set of diff gears and a converter if the budget allows it and head to the track.

now my questions are.

1. what is a safe wet size shot i can use before i melt a piston or run out of pump?

2. is there and way of backing off timing with out getting the computer "tuned"

3. is it true that pintara diffs have a 3.4 or 3.5 something center that bolts in?

4. any other cheap bits to help these engines would be great to know. i already know about the restrictor in the inlet elbow, high ratio rockers will cost to much and im hoping to find a car with a exhaust and extractors on it already. a cam is a maybe depending if a want to do the work.