4A vs 5A Motor and then some...

[PPW-546]

What's the difference between the stock 4A motor (carburetor type) that came with my AE91 and the 5A motor (carburetor type) I just dropped in? It looks pretty much the same except for fuel injector provisions right before the intake manifold.

Also, can I make this engine go fast or should i just drop in a 4A-GE to satisfy my hunger for power?

Thanks a lot and keep on revvin!!!

[Flashmn]

Displacement. 5A being a 1.5 and 4A being a 1.6....
Making an engine fast isnt as much into the engine model, its about financing, if you have money to dish out, you can make it quite fast

[ratboycom]

WHAT!! you have a carbed 5afe but you mention fuel injectors? i beleive you may be confused, unless you mean fuel jets inside the carb

[Flashmn]

Unless theres undrilled spots for fuel injection on the head.

[ratboycom]

ok, i guess i should have read it a little closer

[PPW-546]

Thanks flashmn. Now i understand it better. I can probably work with the financing but the question is are there available aftermarket performance parts for the 5A engine? I saw some pictures of a 4A engine with a short ram intake. I know that short ram works with side draft throttle bodies but how were they able to adapt the intake pipe to the downdraft carburetor? Also, it i place that intake in place of the stock unit, wouldn't it be a hindrance to a TRD strut brace that bolts into the chassis?

[PPW-546]

That's right. There are spots for fuel injection but i'm not sure if it's drilled or not because there are plugs bolted to it with a tube-like fuel rail that holds the 4 plugs together. But this tube is not connected to anything so i know that the engine is not injected, plus considering the fact that there is a carb on top of the intake manifold.