The only reason i wanna stroke it because i want the cc's but in vic theres alot of strick laws on new p platers atm. So i cant really change the motor with risk of getting it put off the road trying to keep it as stock as i can.

What would be better short that will rev or strocked i want something that will keep up with me mates commodores is all. is a 4 speed in a sunny wagon so if that helps any i would loved to be able to rev it out to 9 grand

had a street setup like that, but a A14 that really revs up...*sigh* :D lovely noise. thanx Dodgeman

It's all to do with piston speed. The total distance that a piston travels in a nominated time.

With a 50mm stroke [for example] you could rev it twice as fast as another engine with a 100mm stroke & both would have the same piston speed. [total distance traveled in a unit of time]

If it's ultra revs that you want, then some of the speedway blokes apparently use the A14/15 block, but install an A12 crank along with rods & pistons from something else.
With the 70mm stroke & the longer rods that these tall blocks allow, the rod angle becomes more favourable & they seem to buzz quite happily at 10,000 but personally I'd go with the A15 & keep it under 6,500 for street use & use the extra torque that the longer stroke provides, then just stick it in the next highest gear & haul arse.

But that's just me.

i'm looking for bout 8500 and the occasional 8500+, shorter stroke should help getting there easier? thats why i posted and asked does decreasing really have that impact on revs

I've seen A15's that happily spin to 8,000 rpm so what sorts of engine speeds are you looking for?

Hey, yes the guys looking for big cc's go for the A15 crank setup that works exccellent with 78mm piston or even 79mm if u have the guts. Im decreasing my stroke by haveing have changed my crank to fit a mazda rod so my cc's will be less then tha A15 crank setup, but i'm looking for high rpm, i'm also going for the 78mm piston i should end up with a 1443 l engine. Just a test though

PM clive on this site.

He is busy doing some mods to his A14 that will give it big cc's.
Something of mix between Nissan/Datsun A series and Mazda parts mixed together.
Think it is A15 crank with some machining and Mazda conrods and pistons.
He has the finer details.

1.8 forced
2L n/a

Yeah pretty sure your allowed to go up to 2.4 But if this guy cant drive turbos and V8's Then im pretty sure a Rotary would be out of the picture to. Go visit some Datto performance shops or even well known performance engine specialists and tell them what you want the car to do and How much doe you have to spend. Read up in car mags and get an idea what they are talking to you about. Shop around mate. Don't leave it with the first shop u go to.

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