L28E Power Estimates

[ChevyJ]

Ok, so I am new to this forum, but about a year ago I bought a 280zx with what is so far only rust issues (which have mostly been worked on). The gearbox seems very good, then engine runs perfectly from what I can tell, and the interior is in pretty great shape for its age. But the guy who owned it before me autocrossed the car, and in the ad he mentioned some of (if not all) the aftermarket or generally modified parts on the engine.

 

The list of the parts are as follows:

 

-Schneider Racing Camshaft (274 duration .48 lift)

-Shaved L28 engine - Approximately 11:1 compression (fuel injected for the record)

-Monza Headers

-K&N air filter on high flow cold air intake

 

So I am not the best when it comes to cars, and I do not exactly have easy access to a dyno, so I was wondering what you guys think this could could be making? I'm not really chasing any goal, its just something I've been wondering since I've gotten the thing, hell it could be making stock horsepower and I would still be happy.

 

Also here is the original ad since he never took it off this site for some reason

 

https://www.usedregina.com/classified-ad/1982-Datsun--Nissan-280ZX-_32069386.lite?

[Zcardude]

It's hard to guess what kind of power an engine might make because there are a lot of variables in play, but you should be able to get a relatively close estimation by using your phone with a "dyno" app like pocketdyno, dynolicious, probably some others, if you can put in accurate weights, c/d, frontal area, gearing, tire size, etc. I'd recommend several pulls and average them together. Otherwise a couple of dyno pulls are usually only in the $50-100. 

 

That said if you are taking guesses before you start to get actual numbers, my shooting from the hip guess is 155whp, having looked at other L series dynos in the past...