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

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

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.

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

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

My mate, "The Boss" at my local service station runs a 1200 coupe in the 1600cc class in the Supersprint series. He runs a fuel injected A15 that is bored to 79mm [the racers standard] & it displaces a whisker over 1600cc but is within permitted limits.

During last year [I think] he took the lap record for his class at Wakefield Park twice in two consecutive runs & the tachometer tell-tale didn't record 8,500 rpm [close but not that high]

If you have plenty of money & spare engines, then you can try to make a street engine haul the heaviest of the small Datsun range, the B310 Wagon at racer speeds, but better yet, start with an A15 engine as this was original fitment in the last of the Sunny wagons anyway, make it run as good as you can within a realistic budget & enjoy.

9,000rpm in a streetable A series? Not really an economic proposition unless you can comfortably part with upward of $10,000 for each engine that you have professionally built. [You would probably need a few as the life expectancy would not be all that great]

If your mates POS Commodore is quicker & faster, ... then in the end, who gives a sh1t. It won't change the course of world events if you are faster or not, but I bet you reap the benefit of your smaller car at the service station & at todays prices, I suspect he quietly envies all the extra cash that you have at the end of the week.

If you want faster with a small Datsun engine, then start with a lighter car, much lighter, like a 1200 or even a 1000 two door sedan, the lightest small Datsun passenger model that they made. Trying to haul a barge with a small engine is not the competitive edge that you seek.

any one post pics for me???

i'm not looking at thrashing the poxy v6 that the vp and vr's have just keep up with them. And i really dont wanna buy an a15 mainly because there hard to find and the ones i have found are rather expencive so if some one can help me out with an a15 or something that is equally easy to convert i'd love to here from you but atm i really wouldd like to work on the a14

Well the A15 actually IS an A14 with 5mm more stroke. The only real difference is the longer stroke crank, the shorter deck height pistons [same rods] & an oil pan that has bulges on one side to clear the rods.

To stroke the A14 will involve engine removal & the instalation of the replacement crank, pistons & sump from an A15. While you're at it you would be seriously remiss if you didn't at least lap the valves, give the bore a very light hone & renew the rings & big end bearings & mains, just to ensure that the finished engine had full compression & oil pressure when it's fired up again.

Installing an A15, which is an original fitment in these anyway, would be simplicity itself, particularly if the replacement was sourced from another Sunny wagon. Either way, stroke or replace, you're going to need an A15 short block as a bare minimum, even if it's just a donor for the crank & few people break up a good running engine, so a donor short block may well have some worn parts in it.

I have been asked to post some pictures of the pocket rocket, so here is the Sunny in question. Enjoy.







































































































































OK, I left out another side shot but you get the idea.

well i've hurd that the stanza l series is an easy conversion and that is and l16 or l18 are the parts for an l series any cheaper than a series parts??