SR20 Forum banner
1 - 14 of 14 Posts

·
SE-R junky
Joined
·
52 Posts
Discussion Starter · #1 ·
Has anyone ran these with the de head? was about to do an overhaul and now it time for upgrades:biggthump Also will these work well with S3's? And finaly what kind of fuel upgrade would i be looking at as far as injectors go? Or will the stock 259cc's hold their own
 

·
Registered
Joined
·
945 Posts
I think you will only need to retard the timing somewhat, an ECU mapping for high compression would be better, but it depends on your budget. I am going to be fitting some of those coated 11.6:1's soon, but I have to collect some other parts before taking the engine out.
I have a spraybar lowport with RR cams fitted, I think those will be ok, S3's should be ok, but I havent seen the numers for the lift limit of those. But they are designed for higher powered motors, so they damn well should be ok for s3's, but wait for a definative answer from someone who has fitted that combo.

Mike
 

·
NXTACY
Joined
·
311 Posts
fair enough thats JUST enough clearance but what about at high revs with the stock springs?
 

·
Professor Dingbat
Joined
·
5,543 Posts
To be honest, I doubt it should be a problem. IIRC these are the 20V pistons, whose cams have waaaaay more lift and duration than the S3s.
 

·
SE-R junky
Joined
·
52 Posts
Discussion Starter · #9 ·
FastNX said:
To be honest, I doubt it should be a problem. IIRC these are the 20V pistons, whose cams have waaaaay more lift and duration than the S3s.

They are from the 20V? I thought they were from the N1 sr16. does this mean that there will be 5 valve reliefs instead of 4?
 

·
aka Mr Ryte on G20.net
Joined
·
1,478 Posts
I was thinking about putting these in SR but I'm concerned about which thickness head gasket to get to drop the compression to 11:1......:(
 

·
since 2001
Joined
·
525 Posts
The only concern is the difference in exhaust valve diameters between the DE and VE. The exhaust valve relief on the SR16VE mossy piston may be too small in diameter to accomodate the larger DE exhaust valve. However, if you take into consideration that the factory DE piston does not even have valve reliefs you would think that you would be ok.
 

·
since 2001
Joined
·
525 Posts
FastNX said:
20V is just a name, it still has 16 valves. Why they chose such a misleading name is beyond me......
It's an SR16VE piston not the 20V. The 20v is not a domed part and is more simular to the normal sr20ve piston with a small dish and valve reliefs.
 
1 - 14 of 14 Posts
Top