That's still a fair bit or power for a, what? 1.48 litre, pushrod non-cross-flow.

But even what I wrote is a little optimistic. It depends on the cam specifications as well and the head flow specs. What valve sizes are they?

The big 45's should help with the high RPMs if they aren't choked down too much.

Looking forward to hearing how it goes dude, good work!

cheers mate with the bore it will be roughly a 1.586l or something he hasnt worked that out yet... well i havent gone to see him to ask anyway.. and yea ill post up a video or pics of it on the dyno once its all done and running..

id be happy with 110hp at the wheels for an A series daily

yeahh but the more the better :P

1586cc, that makes the bore 81mm with a a14 stroke(77mm). is it a a14 or a15 stroke.

if u get around same as what u had originally i would be happy.then get 13s and a light diff and remove excess stereo devices, and it would be like adding 50hp.

wouldnt flat tops and a 60thou shaved head give it abit more that 10-1 CR ?

what pistons are you going to run ,what model mazda ??

cheers

ok hear are my engine specs 1400cc gx head ported custom valves 40mm and 33mm with 7mm stems custom bumpstick ground to match head flow figures around 300 duration wiesco custom pistons with dome 14.2-1 ratio knife edge crank comp oil pump twin mikunis crankfire ignition running through custom trans with webster gears and dog rings h145a with 463 limited slip on 114 race gas what do you think crank and rear wheel figures. kept destorying 56a middle close trans

Bob, what are your specs? How much HP?

Bob if I had to guess I would say 120 WHP (based on GT-4/5 knowledge) and perhaps 160ish at the flywheel.

As for a street 1200 , 86 HP at the rear wheels is pretty good. Keep in mind a full race A12 is at 100WHP, I can only speak for my car but with the 73WHP I've started into the beyond of what's streetable: the motor will plod around no problem but it really wants to be kept above 4000 RPM's and the gas milage is not that great (14 mpg on track).

Having had 2 stroke hot rod street bikes there is a definite threshold that starts to suck the fun out of a car or bike...........now if we could figure a way to take an A series out to like 1750cc or what ever that would be the way to go for the street, lower revs same power, nice flat torque curve etc.

Tom