Hi guys my name is John, I"m pretty new here. I have a quick question, I own an 08 civic si and I just recently blew a hole in my block, the dealer says the head is still good, I was wondering if a k20z1 small block from and 06 rsx type s will fit the k20z3 head of the 08 civic si?? thanks for your help :-)
John

 

it will bolt right up. . .basically all kseries will


just make sure to use the z1 headgasket

 

why the z1 head gasket?

 

although you have an odd situation, it will work no problem, as for gasket ... sure i guess you may what to use the z1 gasket but i dont see too much of a reason, why not just upgrade your gasket to gain a tiny bit of compression ... i just gotta ask why dont you just go with another z3 small block (the dc5 type-s doesnt have a lsd stock), and how did you blow the last one?

 

i cant find another z3 small block, the dealer said I hydrolocked it which i think is BS because it happened on a warm sunny day, they said they found water droplets in my intake

 

that sucks, sorry for your inconvenience and good luck

 

What does the bottom end of a K20 have to do with an LSD? He isn't talking about the trans.... :shrugs:

 

well i was just assuming that since he lost the block he wouldnt have the tranny either and since he was talking only about using the head i figured that i would state that obvious fact that it doesnt have an lsd, thats all ...

 

it's "SHORT" block guys. not small block.

also both motors have the same bore size so either gasket would work. i doubt there are any thickness differences between the two and if there is it's not gonna be significant.

 

Well since this thread came up I would like to ask a question myself.

A unique situation has come up at work where someone has traded in an '06 RSX Type S with only 19K miles on it. Apparently he has twins on the way and needs a bigger vehicle. I talked to the guy about his car. He told me basically the damn thing was built to race specs. Fully built blueprint & balanced block with larger pistons, cams, custom SSR race header, Thermal exhaust, etc. He also told me the block will bolt right up to my car.

But would it be beneficial in anyway for me to take the built block from this car and put it on my car even though there's no tuning solutions out yet?

 

if it's built like he says it is it might not be beneficial. you'd have to ask him to lay out more details but mainly what CR the pistons are rated at.

generally speaking, built with no tuning available = fail.

 

this literally made me lol because it reminded me of these 2 videos

http://www.youtube.com/watch?v=prOQ2gavNRI

http://www.youtube.com/watch?v=F7s8nciSWpA

i would put a k24 block on it!

i was curious also after reading rico's post, i was contemplating on getting tsx cams, but im not quite sure if it requires a tune?? im thinking that the ecu will compensate the difference between the stock cams and the tsx cams but i know a tune will give the most power. but i know a full tuning solution is not available as we are only allowed to use piggybacks at the moment

 

the z3 tranny will bolt up to the z1 block.

 

i know but im saying i dont know if he still has the tranny, id just assume since he doesnt have the block he doesnt have the tranny either ... but i guess im assuming to much ... of course the z1 and z3 trannys and blocks bolt up ... they are practically the same just the lsd is the big difference ... lol

 

^gears are different also.

 

from what i remember reading about them, the only difference in gearing was that 6th is longer in the z3 tranny.

he has the entire car, so i think it's safe to assume the tranny is included. he DOES have the original block, but it's blown. did you read the first post at all?

 

not really ... lol

 

No idea what the pistons are rated at. He just said they were "upgraded". He had a K-pro hooked up to it, but took out the computer prior to trading in the car. Does me no good anyway since I believe there's a bunch of other goodies needed to convert a K-pro to the Si.

It's not everyday someone has the opportunity to pick up an '06 Type S with only 19K for $15,500, so I thought about trading my car in for it for a second, but decided against it after driving the RSX. There was some sort of hard jerk/hesitation in the higher RPMs before redline...probably around 7K....almost felt like a fuel cut. That and the speedo went all pissy on me. The needle died and dropped down before coming back to life and springing back up to the correct speed point. There was also a power steering fluid leak.

After that I thought the car might have more problems than benefits.

 

it's not going to run correctly if he took the K-pro unit out. the stock computer can't run the "built" motor effectively.

those other problems aren't key selling points either.

 

.

 

x2

cheaper, more torque and HP... Dont forget to run dual ecu's with the extra $$ you save.

 

the cost of the dual ecu setup would more than negate any cost savings by getting a k24 block. not only would it be more expensive, the op would probably have a shitty time trying to figure out how to even make a dual ecu setup work.

 

Ehh, just mate the z1 block and z3 head and call it a day.

 

So, from what I've read in this thread it seems like this set-up could work in opposite circumstances. Would a Z1 head onto a Z3 block work the same?

 

in for the answer. i'd assume so but i've never tried .