hi guys im rebuilding my ipra coupe A15 at the moment and just what to see what combination pistons and rods you have heard of. i havnt pulled mine down as of yet, i will do that before the weekend and will take some photos of my setup atm so i can try to identify what they are, from what ive been told its a shot peened A15 rod with a resized little end to suit the 20mm mazda flat top setup.
has anybody tried and motorbike piston and rod setups, im going for lightweight rotating assembly and am just trying to find out whats been done.
im not asking you to tell me what you run, im just asking whats been done because my boss basically only deals with ford and holden v8s and has no real idea on current 4 cyl technology, his hay day was spent with datsun 1600 l series donks but.
any info will be greatly appreciated, thanks kurt

Some guys here in NZ run CA16de rods, and mazda MX5(?) pistons. The CA rods use a floating 20mm pin, and 9mm rod bolts. They are much beefier than the A15 rods, but lighter than the CA18 rods.

mmm ca16de didnt think of that, im sure one of the aftermarket suppliers will do a light flattop piston. i was thinking of getting them hpc coated on top and teflon coated on the skirt to reduce the heat and friction of them too

Aftermarket pistons suppliers do a lightweight A15 flattop. Arias do custom pistons.

That HPC coating isn't too dear to have done. (At least here in NZ) I had the (EE5) slugs for my most recent A15 build done, but the engine is barely run in, so I can't say if it's made any real improvement yet.

plenty of aftermarket options Arias etc, cast or forged...
Hbeam rods or even ally ones are available,
Ernie (Bige) on here builds some killer combos

and I'm a Big fan of Ceramic coating and teflon skirts..

just a quick question guys ive just stipped my donk and i just want to know are standard a series pistons fly cut to accept the valve lift?
lucky i did pull it down, 2 of the valves have hit the side of the bore when it threw the flywheel off, and one of the cam bearings is burnt so lucky i did.
im surprised just how well the little thing went for the amount of work done to it... looks like it wont take too much to get some proper power out of it.

Standard A-series pistons are not cut for valve reliefs. The only ones that were notched are the flat-top A12/A10 pistons. And of course competition pistons.

I can't see how the valves would hit the bore just due to the flywheel letting go. I suggest they were scraping the bore before that happened. Stock engines havea relief cut in the bore for that purpose. If you fit larger valves be careful of this.

anybody thought of any other rods? im going to ring arias and spool tommorrow and see if i get anything. i rang rocket industrys and asked the guy if they could get roller rockers for the a series. the bloke mucked around for a second and then said no he couldnt an a series is too old. i then rattled off the part number too him and proved him wrong. spose its just if people want to help you or not.....

why the roller rockers? ive heard one of the best options is the standard rocker assembly but put solid spacers between the rockers in place of the springs, this stops them moving at high rpm.

Do you want to change your rocker's ratio?