Honda / Acura K20a K24a Engine Forum banner
1 - 20 of 23 Posts

·
Registered
Joined
·
1,067 Posts
Discussion Starter · #1 ·
Hey guys,
I'm wanting to build an engine next year, doing some research on it.

Car will be an EG Hatch.

Firstly, i'm shooting for around 250whp. I was wondering, do any of you guys drive around in something with this kind of power regularly?

How much is too much?

I was after some opinions on what sort of setup I should go with aswell.

I am thinking:
-K24A accord block
-pistons ?? Unsure as of yet, any opinions?
-rods ?? Unsure as of yet, any opinions?
-k20z3 ported head
-supertech valvetrain
-cams - I'm thinking IPS.. Maybe k2's?? Any opinions?
-70mm ported rbc im/skunk2 TB
-r-crew 3" headers/exhaust with a high-flow cat
-erl/s2k oil pump
-h-r chain tensioner
-cometic headgasket
-acl bearings
etc

I think that should get me where I want to be.

I was also wondering whether it would be a better option to purchase one of niko's short blocks or DIY. I need to research the cost of purchasing the parts for DIY vs. nikos shortblock. I'm a mechanic and with some help from the mechanics from work, i'd be more than capable of assembling an engine.

I'm after some opinions on cost, what brands of piston/rods etc are suitable.
Also, what c/r pistons etc should I go with? I'm thinking 12.5.

Any feedback and advice would be great, as im trying to organise a complete parts list so I can eventually order the bulk of it in one hit to save on shipping.
 

·
Registered
Joined
·
4,266 Posts
You can do that with a 2.0L block pretty easily I think
 

·
Registered
Joined
·
1,691 Posts
04 and up stock tsx motor and cams 249hp 195 tq

rbc, header, 3inch pipe done
 

·
Registered
Joined
·
2,102 Posts
i had stock TSX block, IPS KME CAMS, rcrew header, Rbc mani (non ported) rdx injectors... i made 250HP ,193tq.....and this was my daily 2+ yrs ago.. Sold the whole car...

still got my monster map saved from back in the day...soo holla!!
 

·
Registered
Joined
·
1,067 Posts
Discussion Starter · #6 ·
i had stock TSX block, IPS KME CAMS, rcrew header, Rbc mani (non ported) rdx injectors... i made 250HP ,193tq.....and this was my daily 2+ yrs ago.. Sold the whole car...

still got my monster map saved from back in the day...soo holla!!
How was it to daily?
Myself, i dont care for PS or AC or comfort much at all... Just as long as a cars driveable on the road lol.

Maybe I should shoot for 275-300HP then
What about that on the street? Too much?

I dont want it to drive like a fool on the road, but i would like to be able to drive it around from time to time... Possibly 4 hour trips to track days... weekend drives up the highway to my parents place for a visit etc etc..
Every now and then to work...

So im wondering the driveability of such a car.

What do you guys recommend for a piston/rod combo??

Are there any items that i'll need to purchase that are normally forgotten about on an engine build? I know ill have to get myself a good torque wrench(s) and some piston installing tools etc.
Im talking things like...
Head bolts/headgasket/rod bolts. Things you dont think about and then realise you need them.
 

·
Registered
Joined
·
1,067 Posts
Discussion Starter · #7 ·
OK, I've been thinking...
I currently have a EG Hatch with a stock TSX motor in it with RBC IM, shitty exhaust.

I'm thinking maybe i should pull that out and build that rather than purchase a new block and begin fresh.

My new questions are.

What is the most suitable C/R for what i'm wanting?
How much on average is it for an engine builder/machine shop to bore/hone a 4-cyl block?? Is that all i would need to outsource on the block?

Other than that I should be able to purchase a piston/rod combo (with rings/pins/bolts) and some bearings.

What would you do if you had a TSX block in your hands to build if you were in my position?
 

·
Registered
Joined
·
44,673 Posts
250hp Aussie dyno or 250hp US dyno?
lol, is the Aussie dyno at the flywheel or the wheels?

Paul, what is your current motor config laying down power wise?

Also, what are the mods you currently have?

For the price of cams, valvetrain, type-s oil pump, a good header, and exhaust, plus tuning you are probably looking at around US$3000 depending on the condition of the parts.
I would go that route first, look at the gains, then decide if you want more power.
Boring it out to 88mm and adding the 12.5:1 pistons with lighter rods will increase your power band throughout the RPM range, but you may not feel the need for that power after doing the above upgrades.
 

·
Registered
Joined
·
1,067 Posts
Discussion Starter · #11 ·
lol, is the Aussie dyno at the flywheel or the wheels?

Paul, what is your current motor config laying down power wise?

Also, what are the mods you currently have?

For the price of cams, valvetrain, type-s oil pump, a good header, and exhaust, plus tuning you are probably looking at around US$3000 depending on the condition of the parts.
I would go that route first, look at the gains, then decide if you want more power.
Boring it out to 88mm and adding the 12.5:1 pistons with lighter rods will increase your power band throughout the RPM range, but you may not feel the need for that power after doing the above upgrades.
You make some good points.

TSX head vs. K20A2/K20Z3 head?

Edit: I haven't dyno'ed the car.
TSX motor/K-pro untuned/RBC with RSX-S TB/DC sports header into OEM DC2R exhaust
 

·
Registered
Joined
·
44,673 Posts
You make some good points.

TSX head vs. K20A2/K20Z3 head?

Edit: I haven't dyno'ed the car.
TSX motor/K-pro untuned/RBC with RSX-S TB/DC sports header into OEM DC2R exhaust
Heads are not too different from each other, I would focus on where you can make easy (and much cheaper) power now. The head will not be a constraint on power until you are near fully built.

Oh yeah, that header/exhaust is killing you.
It would be the first to go, then get a tune.
Cams next, with valvesprings, as well as the oil pump so that you can stretch the RPMs a bit more, also another tune.
Then the Pistons/Rods, and retune.

I would tackle the project like that, you can spread it out over time to fit your schedule/budget. You will see how the changes affect the power band, and you will get a feel for how you like the performance of the car.
 

·
Registered
Joined
·
825 Posts
Some people are ips fanatics. And some like the skunk2. What seems to be makin some good power are the ips, go pwr, and drag cartels. Do a little research.
 

·
Registered
Joined
·
1,067 Posts
Discussion Starter · #16 ·
Im trying to work out whether to find somewhere that can sell me for my K24A2 head:

-IPS cams (i was thinking K2's. Wasnt sure on whether those or K10's?)
-complete valvetrain (supertech)
-Then send out my K24A2 head for a port and polish to a local engine builder, then build the head.

Either that or maybe purchase a pre-built head (id go k20a/z) from the USA, if this were a possible option?

Does anyone know where i can buy those specific cams and valvetrain from the same supplier?? I'm not sure on any good suppliers of engine components.

Another thing, are K20A/Z and K24A2 head components interchangeable?? I dont want to order gear that wont fit my head.
 

·
Premium Member
Joined
·
1,058 Posts
Im trying to work out whether to find somewhere that can sell me for my K24A2 head:

-IPS cams (i was thinking K2's. Wasnt sure on whether those or K10's?)
-complete valvetrain (supertech)
-Then send out my K24A2 head for a port and polish to a local engine builder, then build the head.

Either that or maybe purchase a pre-built head (id go k20a/z) from the USA, if this were a possible option?

Does anyone know where i can buy those specific cams and valvetrain from the same supplier?? I'm not sure on any good suppliers of engine components.

Another thing, are K20A/Z and K24A2 head components interchangeable?? I dont want to order gear that wont fit my head.
might want to upgrade your tensioner? seems like HR got a pretty robust tensioner for aftermarket cams (high lift?)

and what's your intended power band paul?
rpm shift point?

i've been reading abit about tranny shift point and it makes lotsa sense, as in there is no point of making power at 8000rpm and above, but your shift point drops lets say to 5500rpm when shifting through gears.

i guess you would not achieve your maximum acceleration in that 2500rpm climb to get back in your power band.

hope that makes sense.
 

·
Registered
Joined
·
1,067 Posts
Discussion Starter · #18 ·
might want to upgrade your tensioner? seems like HR got a pretty robust tensioner for aftermarket cams (high lift?)

and what's your intended power band paul?
rpm shift point?

i've been reading abit about tranny shift point and it makes lotsa sense, as in there is no point of making power at 8000rpm and above, but your shift point drops lets say to 5500rpm when shifting through gears.

i guess you would not achieve your maximum acceleration in that 2500rpm climb to get back in your power band.

hope that makes sense.
Valid points.
I might need to research that some more.

I'm sure a good tuner would be able to assist in setting the car up right with these kinds of things...
 

·
Registered
Joined
·
1,067 Posts
Discussion Starter · #19 ·
lol, is the Aussie dyno at the flywheel or the wheels?

Paul, what is your current motor config laying down power wise?

Also, what are the mods you currently have?

For the price of cams, valvetrain, type-s oil pump, a good header, and exhaust, plus tuning you are probably looking at around US$3000 depending on the condition of the parts.
I would go that route first, look at the gains, then decide if you want more power.
Boring it out to 88mm and adding the 12.5:1 pistons with lighter rods will increase your power band throughout the RPM range, but you may not feel the need for that power after doing the above upgrades.
I'm looking to take your advice puke. Thanks alot so far, you have offered some very wise information.

I'm still struggling to find a few things i need answered.

I've decided im going to keep my K24A2 for sure and build that up. Makes sense.

I will definately use a better exhast (planning on getting a r-crew header and cat-back with a high flow cat). I have an RBC (going to port to 70mm)/Skunk2 TB/karcepts IM.

Onto the head.
I want to get a set of IPS K2 cams.
I am planning on going with supertech valvetrain.
If wanting to upgrade the entire valve assembly here what exactly do I need?

Springs, retainers, keepers, valves (flatface or dished??), seals, guides. (Do i need all of those??)

The issue here is that most suppliers dont seem to sell ALL of them, it seems the norm to get just springs and retainers. Valves seperate, and the keepers/seals/guides are forgotten about.

What would I need as i would like to get the whole lot in one hit.

I'm focussing on the head at the moment, but one other bottom end question.
I plan on running this car regularly on the road, almost daily. I will be running it on 98 RON pump gas. What C/R would suit me?

Can I go with a 88mm bore and 12.5:1 C/R piston setup for my needs?
Will run on pump gas only...

Any info regarding these matters would be of huge assistance as I dont want to buy components i can't or won't use!!!

Looking to buy valvetrain soon.
I'm about to buy something... just unsure what at this point in time. Too much to choose from :p
 

·
Registered
Joined
·
1,691 Posts
1. and the keepers/seals/guides

id go with the honda oem stuff for this


2.I plan on running this car regularly on the road, almost daily. I will be running it on 98 RON pump gas. What C/R would suit me?
Can I go with a 88mm bore and 12.5:1 C/R piston setup for my needs?
Will run on pump gas only...



i think 98 ron was around 95 oct in north america standards but i could be wrong if 12.5 to1 should work great
 
1 - 20 of 23 Posts
Top