Q's for the high comp KA by Smog510's head swap

[AelSic]

With Smog 510's discovery I need to ask some question's:Will swapping the de pistons still yield a higher comp with the e block/ de head?Would upgrading the injectors and going to a Z32 MAFS or hacked MAF with Apex'i SAFC have any benefit because of the high compression?What is a better rod to use the DE or E?Also would a KAE head/KADE block also yield a high comp motor? Sounds like you would benefit if you swapped heads for both cars since I heard if you swap the pistons from a DE to E motor would raise compression or is this untrue?I'm still trying to economically weigh the benefits of turbo KA to NA KA. I just want a powerplant to enable me to drift. I'm not looking for mass power just enough to get the job done and Smog's swap sounds real viable right now.

[deviousKA]

The bore/stroke, rod length, and deck ht are indentical on the two engines, so the compression ratio factors are the piston and combustion chamber volumes. So, ka24e pistons in a de block with de head is the same compression ratio as the ka24de head on e block with stock pistons. The head swap is possible, achieves the same high compression with slight timing modification. De pistons in either block will be 9.5:1 with de head, and probably around 7:1 with e head. E pistons in either block will be ~11:1 with de head, 8.6:1 with e head. It doesnt matter which rods you use.

you will benefit with proper tuning, with the bigger injector/z32maf/and safc combo. i would suggest some breathing mods as well.

[AelSic]

Tank's for the help devious

[ftrceo]

I have read and re-read the original "Here is the proof" post over and over and would like somethings clearerd up for me since i really want to do this setup.

KA24E Block and DE head frankenstein swap:

is it better to do this in a 89-90 car or a 91-94 car?I ask because they talk about using the ka24E block, and accessories, but ka24DE head, ecu + harness.. which car would it be cheapest in?

How much HP can you expect w/ a Rebuilt KA24E Block, ported DE head and I/E/H? what would hte HP difference be w/ early 89 pistons and with late 90 pistons?

How reliable is this setup?

How hard is it to do the valve cover modifications, blocking plates, timing chain mods (if there is any) ?

can i get a full part list for everything that is involved?

can i get a basic rundown of what i need to do to make this happen, or just a simplified step by step on this.

TIA

I have many more questions but I would like to start off with these, then move on to the other ones later.

[deviousKA]

Look in my post above, basically what it states is that pistons and combustion chamber volume are the determining factors of compression (in this oem swap combo). So if you have a nissan equipped with a ka24de engine, there is no point in swapping in an e block and doing the modifications. All that is necessary to get the same compression ratio is the pistons, which swap directly in

If you have a sohc equipped vehicle, and you do the head swap, You will need to convert the wiring setup just like if you were to do a complete engine swap.

the early 89 ka24e pistons, would give appox. 11.7:1 cr with de head. These pistons would require flycutting for valve clearance. Late ka24e pistons yeild approx. 11.1:1 with de head. The higher compression early pistons will give you a basically static hp advantage of a few hp.

Reliability is only in theory at the moment, smug510 would have to comment on this one.

The necessary modifications and difficulty depend on your capabilities.

The original thread can probably answer your other questions.

[crzycav86]

If you have a sohc equipped vehicle, and you do the head swap, You will need to convert the wiring setup just like if you were to do a complete engine swap.

Why exactly would you need the DE harness and computer? Since there are no real sensors on the head(that I'm aware of) then the KAE ecu can't really tell whether it has the DE head or the E head. If the E fuel mapping can't adjust to the DE head, couldn't that problem be solved with an s-afc? Perhaps you need to use the DE wiring because you use the DE distributor? Is that the only reason? Let me know.

[cosmo]

I just want a powerplant to enable me to drift.

You don't need power to drift. You can do it with a stock KA.