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#1 a12 motor
sunnyrallycar Posted on: 2002/12/1 8:22
is it possible to stick a14 pistons into the a2 i know you would have to machine the rods out is this possible.I have to keep under 1300cc


#2 Re: a12 motor
dimlight65 Posted on: 2002/12/2 15:53
Yes it is possible. That is exactly what I have done for my turbo A-12 engine. I have yet to assemble it and run it though. It may blow up on the first power stroke. I hope not, but Juan never knows. We, my machinist and I, poked and prodded around in the water jackets and feel pretty safe that they are thick enough. I say go for it, mainly because I don't want to be the only one to screw up like this if it is a mistake. Oops, did I actually type that last part?


#3 Re: a12 motor
ddgonzal Posted on: 2002/12/2 19:55
A-12 piston +0.40 over is A-14 piston size. This is what racers use.


#4 Re: a12 motor
b310gx Posted on: 2002/12/3 9:43
using the a14 piston,which is 120 thou bigger,will give you 1270 cc,well under 1300.so theres nothing stopping you.also,check some later a12's,i think the a12a's have the same size wrist pin as a14's.


#5 Re: a12 motor
dimlight65 Posted on: 2002/12/3 15:30
Quote:

b310gx wrote:
also,check some later a12's,i think the a12a's have the same size wrist pin as a14's.

Oh yeah, I intended to mention that too but forgot. I couldn't find A-12a rods so I had mine bored out.


#6 Re: a12 motor
sunnyrallycar Posted on: 2002/12/5 8:02
thanks guys.I thought it was possible but my reconditioner was a bit scared of doing it.

Thanks


#7 Re: a12 motor
1200ute8u1 Posted on: 2002/12/5 8:10
i know its a bit of the topic of the post but what engine was put in a 1600. i mean every one sais the 1600 is fast even my dad does well he would he used to own one. was it an L-16. arent L- series motors heavy would it be a good idea to stick a A-15/A-15 in a 1600.
well l8r sk8r's


#8 Re: a12 motor
dimlight65 Posted on: 2002/12/5 16:39
Quote:

1200ute8u1 wrote:
what engine was put in a 1600. was it an L-16. arent L- series motors heavy would it be a good idea to stick a A-15/A-15 in a 1600.


I was all prepared to shoot this argument down. When I checked the facts though, it seems he might be on to something. But only if you are building for torque, and aren't allowed to increase the original engine displacement of the car.
Since the A-15 has a 9mm longer stroke, (82mm vs 73mm) it should produce more torque than the L-16. Not to mention that an overhead valve, pushrod arrangement is (generally) better for torque than an overhead cam.
On the other hand, the bore size is just about as drastic the other direction (A-15=76mm, L-16=83mm). Theory has it that a larger bore shorter stroke engine will make more horsepower since it will spin higher. I won't go into the "myth of horsepower" again though.
So, it seems to me that, on paper, the A-15 could be a better choice than an L-16 in a 1600 (called a 510 here in the states).

Of course, those arguments go right out the window once you notice that L-18s and L-20Bs practically bolt right in to the 1600.

1200ute8u1, good idea in theory. But I think the power advantage of the bigger L-series engines outweighs, pardon the pun, the weight penalty.

It's a small bunny.






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