k24a1 head vs k20a2 head swap

[kale's blue ep3]

staying a3 with the vtec killer setup and kpro be reliable?

[talonXracer]

just saying thats what i would do.

and my post said for a1/a2 flow comparison at STOCK specs it flows better. you have corrected me in the past about the flow. thats why i said that :wink:

But i would just go a1 it has more flow at stock specs than the a2 and better driveability.

But your insistence on the fact the A1 is a better swap is oh so wrong on many points, it is a decent swap if you want to retain the economy mode of VTEC, but it produces far less whp than the A2 head swap and with Kpro there is absolutely ZERO drivability issues.

On the flow bench the A1 DOES NOT outflow the A2 when comparing flow at specific points using their respective stock cam profile specs, even using stage3 2lobe cams show less flow than with stock A2 cam profiles. Using A2 cam specs, the A1 flows better down low, but falls off at higher lifts and durations.

[EP3Casas]

But your insistence on the fact the A1 is a better swap is oh so wrong on many points, it is a decent swap if you want to retain the economy mode of VTEC, but it produces far less whp than the A2 head swap and with Kpro there is absolutely ZERO drivability issues.

On the flow bench the A1 DOES NOT outflow the A2 when comparing flow at specific points using their respective stock cam profile specs, even using stage3 2lobe cams show less flow than with stock A2 cam profiles. Using A2 cam specs, the A1 flows better down low, but falls off at higher lifts and durations.

i understand now.

OP listen to doug. he knows.

[talonXracer]

Now with just port matching the A1 head, the heads could be virtually identical in flow. The ports on the A1 are slightly smaller which help the low end but detract from the top end. The A1 uses the same intake as the base RSX it has smaller port dia's than the A2's(and ep3's) mani.

[kale's blue ep3]

so when getting kpro it would be for whatever year head i get?

[talonXracer]

Nope, kpro could care less what head you have, you would just load the appropriate calibration for your setup and then street tune.

[kale's blue ep3]

Thanks talon im just trying to get some kind of plans for this summer.

so kpro is basically unversal with all k series?

[talonXracer]

That is correct for the EP3. Some Kseries engines will require the removal of the drive by wire TB and the EP3's TB installed.

But not all Kseries ECU's can have Kpro installed and Kpro does not neccesarily work in every chassis with a kseries engine.

[sincityep3]

for the a1/a3 vtec killer set up do you just get the complete a1 head and throw a2 cams in to make it vtec killer?

[Gilmour]

for the a1/a3 vtec killer set up do you just get the complete a1 head and throw a2 cams in to make it vtec killer?

I’d suggest a bit of seat time in a vtec killer a1/a3 setup before you invest in this swap. It’s not for everyone, especially if the car is a DD.

[Blah1219]

for the a1/a3 vtec killer set up do you just get the complete a1 head and throw a2 cams in to make it vtec killer?

The k20a3 and k24a1 valvetrain are the same. I would suggest getting k20a2 valvetrain while you have the head if you plan to take it to 8k redline.