k24a1 or k20a2?

[shivic]

i thin a k24 engine with a k20r tranny would be sweet. that's what im building right now.

[magmagik 1]

If you plan on getting a2 head on that a1, then it will be just as fast if not faster, then a2. A1 without a2 head and same mods as a2 will always be slower.

[arthur]

i found a k24a1 shortblock for about 1000$, plus the head 600$, plus kpro $1000. thats what i could find here outside the usa. if i want an a2 it be more expensive since id have to bring it from the usa.

[lldiesel386ll]

i found a k24a1 shortblock for about 1000$, plus the head 600$, plus kpro $1000. thats what i could find here outside the usa. if i want an a2 it be more expensive since id have to bring it from the usa.

if that is the case i would totally go for the k24/k20 combination. while it is ripped open you should probably replace the oil pump for something better. i have not dug into it too deeply, but i think doug (talonxracer) did and found that the k20z3 oil pump has better idling characteristics of the k24a1 oil pump without its tendencies for cavitation at higher rpms (something that the k20a2 oil pump addresses). i personally have an a2 pump in mine and all has been going well

[socalsx]

Why would you want put a k20a2 head on a k24a1 bottom when the two heads flow nearly identical??

[bchaney]

Why would you want put a k20a2 head on a k24a1 bottom when the two heads flow nearly identical??

For 3-lobe "true" vtec (more hp).

And definitely add the k20a2 (bolts right onto the a1) or k20z3 (modification req'd) oil pump.

[davisj3537]

For 3-lobe "true" vtec (more hp).

And definitely add the k20a2 (bolts right onto the a1) or k20z3 (modification req'd) oil pump.

Well it doesn't bolt straight in...atleast it didn't on mine. I know there are some different k24a1's out there but mine had to be modified. The a2 will give more tq but not as good of idle characteristics like mentioned above. The z3 nets less tq but has awesome idle oil delivery. Basically if you are going to cam it then the a3 is the way to go. If you are not camming it then I vote the a2 pump. There are more modifications to make the z3 pump work....I wrote a DIY on it.

[6od5peed]

the K20a3 bottom end doesnt make the power with a vtec head that a k20a/a2 bottom does. youll be lucky to reach stock k20a2 numbers with a tuned k20a3 with an a2 head.

The only thing in the build that wasn't swapped out was the block. All the internals were changed, so it didn't matter if you started with a K20A or K20A3, it would make the same power!

[Guardian]

200hp stock > 160whp stock