I'm aware of the subtle differences between the FD's and FA's intake manifolds as stated by Kidnkorner in the following thread:

https://honda-tech.com/forums/honda-civic-2006-2015-79/rbc-vs-rrc-visual-comparison-2491878/

but, I've been looking for parts that are compatible with the FD2. My question: are there any limitations or fitment issues that would come up if one were to install certain k2oa parts to the k20z parts from the two 8th gen civics? I'm not talking about internals, but simple bolt-ons that would not address the issue of the lack of tuning for the usdm civics (clutches, brake components, higher end intakes, etc).

From looking at the thread posted above, I'd don't see any hindrances that would prevent an aftermarket intake from being interchangeable between the two cars. I know that most of you would probably say just suck it up and by an injen intake. However, I'm just clarifying what can and cannot be installed between the two.

Moreover, I believe the transmission between the FD and the FA are identical in terms of housing and coupling to the motor (I know there are a few gearing differences), but would clutch kits designated for the k20a be compatible with our k20z's?

 

suck it up and buy an injen
hahaha
i think the flywheels and clutches are interchangeable.
it wouldnt be traditional of honda to not make motor parts of the same generation interchangeable.

 

That's what I'm trying to avoid. There are plenty of intakes, cams, oilpans, you name it, on the market for the FD and I wanted to know their compatibility. If they are compatible, then doesn't that expand everybody's options when it comes to parts?

 

ive heard of fitment issues on the intakes and such, like the backyard special scoop needs some modification to fit the fa. all k-series internals are interchangeable. and exhaust/header for the fd2 will fit a fa5.

 

Thanks for the input. Any more detail on these fitment issues?

 

so i found out that the k20a tranny will not fit because the tranny housings are different.

i thought the scoop was part of the gruppe m intake??

 

The gruppe m intake deals requires some reservoir remounting, shroud replacing etc. None of which I believe would cause issues with the throttlebody intake coupling.

 

So is it safe to assume that clutch kits made for k20a's won't work for z3's?

 

idk about the clutches.
i just know that the tranny's dont line up. but i think clutch kits are model specific and flywheels also?

 

dunno about the k20a, but i remember reading about how in order to use a k20a2 clutch on the z3 you also gotta use an a2 flywheel. might be the same thing for a k20a clutch..

 

I see. So just as long as you get an entire kit, a2 compatible flywheel, clutch, pressure plate it should work. Thanks for the input.

 

that makes sense.
i think im gonna get the act 8lb flywheel, and stage 1 or 2 clutch assembly.
and since they are local i can go direct

 

The problem with using higher end intakes designed for FD2 is the lack of provisions for the MAF sensor. FD2 doesn't have one.

Perhaps you should consider reading another one of my threads.

http://www.8thcivic.com/forums/bolt-...-flywheel.html

Anything higher than stage 1 will blow the master cylinder. I recommend picking up a FD2 master cylinder and an adjustable slave cylinder from me.



K20A from what JDM car? FYi the USDM si has the same gear ratios as the FD2 except it has the TSX 6th gear. All you would have to do is install the JDM 5.06 final drive and the 6th gear from a 05-06 RSX-S

Better read up, stage 2 and 3 are a no go especially ACT. The flywheel is stellar.

http://www.8thcivic.com/forums/civic-si/126164-no-more-fa5-me.html

ACT refuses to address the issue about my car. They won't even return calls or emails anymore. I even get put on terminal hold

I won't sell or recommend their products to anyone.

 

any k20a tranny will not fit. if it doesnt bolt up to the k20z1, what makes you think it does bolt up to our motor?

my friend has the stage 3 and 8lb flywheel from act on his turbo si and its fine.

 

how long has he had the stage 3 clutch from act? the spring pressure alone will cause the ms to blow, also the distance from the throwout bearing to the spring forks is too much, what did he do to overcome that?

My case is NOT isolated. I have several customers that have experienced the same issue and a few reporting members of 8th too.

So you are saying that the FD2 transmission Is out too? That was what was on my mind.

 

for a few months now.
maybe like 3 or so.

 

Thanks for the input Kid.

 

yes the fd2 tranny is out.
i was gonna get it cuz i thought it would bolt up cuz i had the money saved up, and i went to this one website (i forgot what it was, ill ask my friend later) and the tranny was like 2700 i think or something, but it said it would not bolt up the 05-06 rsx-s and it has the k20z1, so i figure it wouldnt bolt up to our car cuz we have the same motor, well almost the same motor as the rsx-s

 

I think you are confusing the transmission bolting up to the engine with the transmission VSS or other sensors and what not being compatible.

Also the 8th gen civic shift mechanism shifts differently from previous K series vehicles. The motor and bell housing's bolt patterns are the same.

http://k20a.org/forum/showthread.php?t=46429
http://k20a.org/forum/showthread.php?t=40933

 

I don't see why you would need to bolt up an entire FD2 gearbox to your car if the only difference is the 6th and final ratios.

 

Seriously, all you would really need is the final gear from the FD2 trans and the 6th gear set from a 2005-2006 RSX-S to make your trans equal tot he FD2 unit.

 

thats true.
but some people want the authenticity and not knock off or poor man's stuff ya know.
and ppl that have kind of money will go to the extreme when there are other methods of achieving the same goal

 

i don't understand that mentality. if there is a cheaper way to do the exact same thing, why not? we're not talking about using weaker/cheaper parts here or anything; you'd have the exact same thing.

 

i see that mentality as a thing kinda like for bragging rights.
kinda like saying yea my stuff is legit and no knock off like whoever's stuff.
you know how it is im sure.

 

eh, if you have nothing better to throw money at, then why not. however, knowing that both would perform equally, i'd definitely go for the cheaper option, no question. i guess being jdm isn't important to me