We all start somewhere, some of us have been 'in training, like it or not' since little kids. Some set ups require a laptop computer to interface with the system & others do not as they have an onboard interface for making fuel mapping adjustments. You can have these systems use the stock intake (limited performance), a custom intake plenum or an ITB setup. Typically these set ups replace the stock ECU & require using some other components then the stock Nissan EFI componetry. These range from a $500 Megasquirt set up to several thousand $ Motec set ups. Then you get into aftermarket electronic Engine Management Systems. The carb sits in the middle of the intake manifould with unequal length runners comming off of it. However there are rumors that the 1st & 6 intake runners are a little lean.

Some have had good performance with this setup. There is an American carb style set up using a special manifould & a 390 Holley. But once dialed in there is nothing like them. Triple Webers & the like initial cost are expensive & you will have to expierment with different jetting to get right. Needle profiling is a tedius task to get them dialed in exactly the way you want over the rpm range. They are easily set up & you can get them close to what you need without getting into needle profiling. SU carbs are cheap but have their limitations when you get into all out performance. To go? I plan to port the hole thing out.' ' If the stock ECU dose not work all that well what would be the best way if you are keeping the stock intake setup I would stay within the stage 1 - 3 range. Here's some links that would give you a rough idea. This will up your compression ratio giving you more HP. I would also recommend going to flat top pistons if you haven't already. If you hog out the head & use a big cam only to leave the stock intake & exhaust intact you will choke your head & cam setup & not realize your porting & cam potential. Click to expand.Your engine build should be planned as on the whole.

Msa twice pipes install