I have done a fair anount of research on the engines. A lot of the info is spread amongst other threads and topics, kind of hard to find.
As the engine is becoming more popular for conversions, and also tuning in thier original cars, can we have a thread that concentates on it specifically?
My prospective build is as follows:
z18xe/x18xe1 engine.
Head:
ported, work on runners, short side radius and combustion chambers.
piper 285 cams purchased (from x14/16xe)
spring kit....i bought a set for the 14/16xe but spring caps are to suit 6mm valves/collets. I am looking in to corsa vxr spring kits to suit 5mm valves....any more info?
sticking with hydraulic lifters.
Intake:
big bang r1 throttle bodies and airbox, utilising variable length intake set up and R1 air filter, to be fed from bonnet vent.
Custom inlet manifold to suit.
toyota 2zz injectors (to suit r1 bodies and fuel rail)
management:
Emerald k3 system, wired to run servo for variable intake tract length based on target rpm, + wideband lambda sensor for initial base mapping before dyno work.
exhaust:
Tony law full system from 16xe nova, 14/16xe manifold, ports line up using top manifold bolt holes, lowers need to be elongated to fit studs on head.
internals:
stock crank
z18xer pistons and rods, pistons use valve cut outs and a domed top for more compression. This set up i have seen mentioned, but no hard cold facts about. Apparently it results in 11.7:1 compression +/-.
arp rod bolts (m9 type)
target red line would be 7.5k rpm, hence only using quite mild cams. The bottom end once balanced should cope here quite well.
lightweight flywheel and h/d clutch, mated to a Quaife f13 sccr gearkit/box with a 3.9:1 final drive.
If anyone else has any useful information. Hints, tips, experience or otherwise, please share.
I Believe people are a bit scared to use/try this engine because of the lack of information. It'd be nice to open it up.
basic limitations seem to be with Cams, ie, clearance with pistons, i am hoping the xer Pistons will be an easy way of removing this limitation. For those wanting to not go too high with compression it would be far easier to remove the dome than make the cut outs i am sure.
as above, lets try and hear everything we can about these motors.
Thanks, Ollie.