Yes same rod
Just different piston height

DOes the a-14 and 15 use the same length rod?

I've found these guys real knowledgeable, I've purchased 1st, 2nd, and 3rd oversize pistons from these guys, they have or shoudl I say have had both flattops and dished pistons.

PISTONS AUTO
(03) 9729-9522
1/3 POWER ROAD
BAYSWATER, VIC

Not a cam specialist I'm afraid

I rang the local cam specialist and told him about my motor
He said I'll give you the biggest one I have
So I bought it

kue1000 now has it for his engine 220 thou lift at lobe

I then wanted bigger so Clive at Clive cams made me a bigger one so now I have 309 lift at lobe

Individual runners required
And abit of compression

What cam specs would you sugest dattoman
?

The UC engine was used in RWD Mazda 323's in Australia

Thanks Dattoman, that gives me something to llok at, I was hoping I didnt have to modify that much but, maybe the only option, by the way what is a Mazda UC

The UC pistons I used in mine needed some milling off the top to get the pin height right
They also need the small ends of the rods machined out to 20mm

They are flat tops once machined down



After I broke those I changed to another Mazda piston that needed no top machining
Pin height is 28.6 instead of 30mm so piston is 1.4mm down the bore
Less compression but might pay to calculate your own based on the head chamber volume anyway.
Still needs 20mm pins

The mazda is 77mm bore standard.

Theres also a Miata 1.6 piston from the 1.6 non turbo you could look at
But it needs more shaved off the top and will give over 11:1 compression when set up
Still 20mm pin size

Then theres the Subaru Justy 3 cylinder piston
But this needs the small end bushed down to 18mm I think. It also needs the block decked about 80 though. This might play havok with timing chains but not sure on this. Its 79mm bore too I think, bit big.

where would 1.5mm over be available thru, and what about flat tops?

The largest 'factory' oversize is 1.5mm [which is close to 0.060"] however some racers run bore sizes out to 79mm, which is 3mm [0.118"] over
For street use, I would suggest the factory oversize is a practical limit.