dose anybody know about the N.A.P.S system for a 280 what kind of effects it would have on the motor or any gain to haveing this?

As I recall, the version of the NAPS used during that era was used on the Z series four cylinder engines. I don't think there would be any gain or even if it could be adapted to the L28. It was basically an emissions system. Nissan Anti Pollution System.

  sblake01 said:

As I recall, the version of the NAPS used during that era was used on the Z series four cylinder engines. I don't think there would be any gain or even if it could be adapted to the L28. It was basically an emissions system. Nissan Anti Pollution System.

Dig this complete NAPS intake from a 75 280z on sale on Craigslist in L.A. I know it's from a '75 280z because I saw it first at a salvage yard but did not pull it before this guy did. I had never even heard of these before seeing it firsthand.

http://losangeles.craigslist.org/wst/pts/2476231797.html

yea i found one today and thats why im asking. by the way its on ebay now if you want a shot at it. so i guess if anybody knows chime in.

Weren't there some later (like mid to late 80s) non USA vehicles that used the L series 6 cylinder? I've been around Nissan/Datsuns my entire life and never saw this on any USA Datsun/Nissan. I doesn't look 'modern' pre se but it look more modern that anything that would have been on a mid or late 70s Datsun/Nissan.

At Zcar.com, the topic comes up from time to time...

http://www.zcar.com/car_talk_forum/what_is_this_manifold-naps_831617.0.html

http://www.zcar.com/70-83_tech_discussion_forum/l28_naps_896835.0.html

Search over there for more info.

I guess if you can navigate through the hostility over there you might actually find more info......

There's also this thread on Hybrid Z:

http://forums.hybridz.org/index.php/topic/32764-naps-l28-intake-manifold-with-twin-butterfly-tb/

The author of the post is NZeder who is also a member here but I haven't seen him on this site for at least a year.

Edited July 5, 201113 yr by sblake01

Someone in the local Z Club here in San Diego had a 76 280Z FairladyZ 2+2 a few years back which he had imported from Japan thru the Navy (lucky ducks) and it had an L20A with the NAPS intake (NAPS = Nissan Anti Pollution System). From its name and acronym I doubt that it's a performance enhancer. Just a curiosity for what it is, but it's one of those JDM parts we won't be disappointed we didn't get it here in the USA.