Post by
DachshundTooAteEZ »
https://forums.nicoclub.com/dachshundtooateez-u105404.html
Mon Oct 20, 2008 4:30 pm
Your limitation is the head design, basically, it's SOHC and thus has rather inconvenient locations for the plug and port shapes, not crossflow etc. Many would use a P90 turbo head for its larger ports (from which you can probably get the greatest HP stats), some would use a later N47 for its flow characteristics, compression... It's all individual and better discussed by people who have played with it more.
Keeping it short here (if you need details, be devoted enough to look them up), for an N/A L28, with some cam and a bit of magic to the stock head, about 300hp is possible, but might still not be adequate for what you actually want to do with the car... This is convenient, because your stock internals will probably deal with no more than 300hp, which is a testament to them.
An engine built race-style is only really good if you actually want to thrash the engine, if you want to be a bit gentler with it, you'll actually wind up faster with a milder build. A 200hp build on the L28 is regarded as more streetable. Think of how quick your Z is even with it's stock horsepower numbers (these cars do a lot with little horsepower) and you'll find that more impressive than it sounds on paper.
You can then proceed to going VERY fast with an L28 by either replacing the head with an aftermarket DOHC, or slapping on a turbo, but those will put you over-budget and not be as driveable or reliable, likely.
If you really want a turbo, find a whole car for cheap.