2AGE

[Vertigo]

sup
ive decided that getting a 4AGE would be prohibitive at this point (lack of funds), so why not try to GE my 2A?
so i ask you, if i was to go this route (i may or may not get a 4A block in the long-term future), and bearing in mind im on somewhat of a budget and not looking for great performance, what should i do to it?

[Ae92typeX]

really, you wont be looking at much differnt in price imo. 4ages can be had from $150 on trademe.
you could make a 2age, but would still need to get a loom and ecu, or if you go carby, a new manifold, which from the ones I have seen, is more than buying a used 4age anyway.
just my opinion, but id keep your existing motor running/tuned well, and if you desire, save for a 4age conversion in the future. If your not looking for performance then its a bit of a hassle to do at all. Novelty wise, it would be cool though.

heres a 2age link for you to look at:

http://www.kp61.net/theBoard/viewtopic. ... 87538bf830

[Mr Revhead]

if you cant afford to buy a 4age you may find yaself short for building a 2age....


its been a while since i looked into them but i dont think you can run the 2a pistons..... so you need to fit 4age ones, and i cant rememebr the gudgeon sizes....

a 2ag will cost more than a 4age

[strx7]

Isn't a 2A 76mm bore while a 4A is 81mm bore?

[Mr Revhead]

cant remember

i think ill go have a look at a few things.....

[Vertigo]

hmmm good points raised. but the thing is, i already have a 2A, so at least it wont be a complete re-engine. and i can upgrade to a 4A at a later date, just swap the block over. the attractiveness to this is overwhelming.

that said, if i find a cheap 4AGE, then sweet.

also, yes i believe 4A pistons wont fit in 2A cylinders. why would you swap them anyway? unless the (un-planed) 4A head raises the compression above factory 2A spec?

the lols i would get from my brother would also be a plus

[Ae92typeX]

what sort of cash are you planning on spending?

I still think it wont be any cheaper taking into account that you have the 2a. More of a fun project, or a race engine in a specific class project.

[RedMist]

You are going to have to think seriously about fueling. I doubt very much if the engine will run well on a 4age ecu. Carbs or aftermarket ECU will cost considerably more than I would guess your willing to spend.

Considering a complete engine will cost about as much as a gasket set. My bet is its going to be considerably cheaper to go the 4age route.... and net you

[ATAl]

For fuelling, you could use some injectors that are ~20% smaller than the 4age ones - this is assuming the 2a will use 20% less air hence fuel.

Just so long as they are the right impendence and physical size they should work alright as the ecu works on the time the injectors are open not the amount they flow. So it should be able to run the smaller engine.

Your next problem might be finding a cambelt that fits....

[Mr Revhead]

theres an off the shelf belt that fits.

im with redmist there.

as for using smaller injectors.... that wil take some playing with....

[spencer]

For fuelling, you could use some injectors that are ~20% smaller than the 4age ones - this is assuming the 2a will use 20% less air hence fuel.

Just so long as they are the right impendence and physical size they should work alright as the ecu works on the time the injectors are open not the amount they flow. So it should be able to run the smaller engine.

sound good in theory but its not going to work(Not well anyway) it will have heaps different fueling requirements. The other guys are right a 4ag will cost you less time and money in the end

[Vertigo]

oh well... considering the effort of getting the fueling right, i might just build up a 4AGE from scratch.

that said... a 2AGE would still be only 1.3L... and fuel prices these days...might pay for itself...

debatable

[Ae92typeX]

yeah, but if only looking at fuel prices, a nicely kept standard 2a with say a rebuilt carb would pay for it self even more...since you already own that.

[RedMist]

You'll never get the fueling right with just swaping injectors. There will be everything from lean detonation to borewash within the same fueling map.
One last thing to consider with a cheap 2age is velocity. The bigport head, which I suspect with your budget is the only one for you, has shitty velocity for a 1600cc engine. Decrease the cc and you have a bigger issue. Fuel will puddle and you will loose considerably more hp, and fuel efficiency.
I think you'll find a majority of the 2age engines were created to enter 1300cc class racing, and were expensive engines to get right. However I havent seen one around in a while, the G13 is a far superior engine.