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View Full Version : a3 motor build up!


LONESTAR
02-15-2007, 06:16 PM
here's the deal guysi got an a3 block and i am gonna rebuild it and boost it. i need some imput i've never boosted a car before and i pretty much know the basic info on how to do it i just need some advise on what parts to get. heres my goal. bump my redline to 10 or 12 thousand rpm and get it to handle 14lbs of boost. i dont know how much power that will make but from what i've heard that should get me in the 290-300 whp. if you guys have any advice what so ever i would really appreciate it. thanks .

azbabybash/domokun.

noVtecHERE
02-15-2007, 06:19 PM
i dont believe any motor can rev that high safely, and why would u want to... ? thats freaking high... but as for boost, 14psi should beable to b done on a stock motor for sure, but for how long, the other guys will chime in here with good info, i just saw the rediculously high redline at 10K thing and was curious to see if it can be done, i dont think so since i have never seend a K go past 9K...

LONESTAR
02-15-2007, 06:23 PM
i dont believe any motor can rev that high safely, and why would u want to... ? thats freaking high... but as for boost, 14psi should beable to b done on a stock motor for sure, but for how long, the other guys will chime in here with good info, i just saw the rediculously high redline at 10K thing and was curious to see if it can be done, i dont think so since i have never seend a K go past 9K...


heard it on ep hatch of a kid reving 10k rpms. but i dont know how much he knew about cars i want my car to be reliable too. i am willing to spend the money to make 300hp that's really my goal.

95civic
02-15-2007, 09:19 PM
hi rpm are no good w/ boost man

JustinD
02-15-2007, 09:35 PM
300 hp on boost is not hard to get to at all.

EPthree04
02-15-2007, 11:59 PM
i would not build an a3. i would go a2 or k24 if you are serious about making power and making it reliable power! a3 is an okay engine but has its limits for stock. there is almost no aftermarket for parts for this engine. you can make 300hp out of it, but you will need a pretty large turbo. a full race gt series kit will probably make you happy, just use k-pro. goodluck but i would honestly put that money towards a k24 and then boost that.

onefst91hatch
02-16-2007, 12:49 AM
a stock K can handle 30 psi if tuned correctly and done properly. but i dont know if i would attempt that on an A3. just my .02

LONESTAR
02-16-2007, 07:17 AM
ok so here's my question can i at least make 250 whp on a stock a3 block? and what size of a turbo?

Mike
02-16-2007, 08:34 AM
a stock K can handle 30 psi easily if tuned correctly and done properly. but i dont know if i would attempt that on an A3. just my .02

30 psi on a stock aluminum sleeved motor!? I don't think so.

azbabybash, 250whp on an A3 with a supercharger is possible. But you have some serious misinformation from ephatch, that website is garbage. I suggest you go to k20a.org and do some serious searching around the forums. All the information you need is there, just gotta search for it.

EPthree04
02-16-2007, 11:01 AM
yeah, i dont know about running 30psi on an a3 lol. k20a.org will give you correct information. ephatch is a nice site for other mods for the ep3 but when it gets down to motor talk there its almost complete bs. and mike definately knows what he is talking about having dealt with many k-series and owning alot.

GNU
02-16-2007, 11:27 AM
boosted k24 would be sick. I think Aebs makes sleeves for them. The only drawback to the k24 can be there stroke at high rpm. GT35r on a k24 would be a killer combo

JustinD
02-16-2007, 03:58 PM
30 psi on a stock aluminum sleeved motor!? I don't think so.

Mike, Your WRONG.

The motor will take 30 psi. For about 2.1 dyno pulls until explosion....lol

SSMdc5
02-16-2007, 04:06 PM
a stock K can handle 30 psi easily if tuned correctly and done properly. but i dont know if i would attempt that on an A3. just my .02



there is no way a stock block with 30psi will hold. that is over 500hp if tuned.

noVtecHERE
02-16-2007, 06:40 PM
well shit.. wha-whew! 500WHP for 2 dyno pulls lol!


boost ya u coul make 300hp but why, just get a K24 and a kit and tune for 300...

all MotR EP3
02-16-2007, 06:49 PM
drop the a3 and get a k24a1 instead, itll be cheaper and youll be happier

EPthree04
02-16-2007, 09:38 PM
drop the a3 and get a k24a1 instead, itll be cheaper and youll be happier

well said! and x2 fo sheezy! k24 is the motor to use for boost for sure! a2s and a3s are good motors for boost but k24 will make the most power the easiest!

akshun_ep3
02-17-2007, 02:55 PM
ok so here's my question can i at least make 250 whp on a stock a3 block? and what size of a turbo?

go with the rev hard kit but upgrade with an HKS turbo. Size is up to u. And use an Excedy clutch. at 11lbs it made 240-250hp. at 15 it made 265-275. i had cheap ass tires on so the dyno wasnt exact.

Mike
02-17-2007, 03:05 PM
i had cheap ass tires on so the dyno wasnt exact.
say what?

onefst91hatch
02-20-2007, 08:02 PM
i have seen a stock K20a in an ek hatch tuned to 30psi. the car was daily driven on C16. i dont know HP numbers but i seen the car in person and it fuckin moved. i didnt believe it at first either. until he took me for a ride. he had it like that for about 3 months til his wastegate fucked up and he spiked 42 psi and shot a rod outta the oil pan. he said the only thing done to the engine was oem K pistons outta something else that would give the R lower compression, head studs, and a thick cometic head gasket. I SAW HIS BOOST GAUGE HIT 30 PSI!!!!!!!!! i didnt say it was a "good idea." but i have seen it done. i wasnt suggesting it. but he said he wanted to be 250-300 hp and i was just stating that its very possible with a stock block on boost!!!!!!!!

Mike
02-20-2007, 08:59 PM
If he was running 30psi it blew because he was runnign 30psi, not because his waste gate blew. And i'm sure it didn't last more than a few pulls, it can't.

Not only that, but 250-300whp is capable on about 1/3 of the boost he was supposedly running.

I think you are talking about a black EK/EM1 that was running a stock CRV motor that was running around 20lbs, that thing ran for no time, and his intention was for it to blow up.

No stock Honda motor (less the Prelude B20's and the RDX K23's) have ever been capable of anything over 15ish and be reliable. I'm still holding up the BS flag.

onefst91hatch
02-20-2007, 09:04 PM
no when he took the wastgat off the diaphram was ripped. he showed it to me. and im not thinkin of a black em1. it was a gray/silver ek hatch! i rode in the car!!!!

Mike
02-20-2007, 09:09 PM
And you're saying a K20 on 31lbs and C16 made 250-300whp?

91integrs
02-20-2007, 11:36 PM
i have seen a stock K20a in an ek hatch tuned to 30psi. the car was daily driven on C16. i dont know HP numbers but i seen the car in person and it fuckin moved. i didnt believe it at first either. until he took me for a ride. he had it like that for about 3 months til his wastegate fucked up and he spiked 42 psi and shot a rod outta the oil pan. he said the only thing done to the engine was oem K pistons outta something else that would give the R lower compression, head studs, and a thick cometic head gasket. I SAW HIS BOOST GAUGE HIT 30 PSI!!!!!!!!! i didnt say it was a "good idea." but i have seen it done. i wasnt suggesting it. but he said he wanted to be 250-300 hp and i was just stating that its very possible with a stock block on boost!!!!!!!!

You sure it wasn't his tire pressure hitting 30psi?

JustinD
02-20-2007, 11:44 PM
You sure it wasn't his tire pressure hitting 30psi?

lol...

yeah, a k20 on 30psi and C16 would be in the 500-600 hp range if tuned properly. And if NOT tuned properly, it would blow the fuck up.

onefst91hatch
02-21-2007, 01:09 AM
You sure it wasn't his tire pressure hitting 30psi?

haha! im not an idiot fool! i have been in the automotive business for along time. so :whatever: !! im done with this thread. i know what i saw and i know what he was running. so i dont ned you guys to tell me im wrong! and to azbabybash, i hope your build goes well. and all i can say is RESEARCH YOUR ASS OFF! you can never do too much research. and take note of what every1 on this site says as well cause most of them are very knowledgeable!!!

KingPastry
02-21-2007, 10:21 PM
i have heard that with the honda s2000 valvetrain the car will rev to 10k repeatedly and reliably

with that being said.. boosting your a3 AND running those rpms is NOT advised.. i ran an a3 at 8lbs and hit around 270-280whp.. after upping the limiter to 7500 though.. the motor only ran for about 2 more months before it gave out and i was on to a k24a2

you can ask about the blow up.. mike and justin both know just how big it was.. haha

91integrs
02-23-2007, 10:55 PM
haha! im not an idiot fool! i have been in the automotive business for along time. so :whatever: !! im done with this thread. i know what i saw and i know what he was running. so i dont ned you guys to tell me im wrong! and to azbabybash, i hope your build goes well. and all i can say is RESEARCH YOUR ASS OFF! you can never do too much research. and take note of what every1 on this site says as well cause most of them are very knowledgeable!!!

Well I aint no Judge Judy but this post smells like shit. But seriously building a A3 equals beating the one eyed yogart slinger drunk. Think about it, go K24.

SSMdc5
02-24-2007, 02:11 AM
lol...

yeah, a k20 on 30psi and C16 would be in the 500-600 hp range if tuned properly. And if NOT tuned properly, it would blow the fuck up.

My boy made 501whp at 25 psi on race gas on a built K20... Fuck the A3 get a K24 if you can.

ikon671
02-24-2007, 09:48 AM
you can run 14-15psi daily provided you have a good tune.. I can't recall hearing or reading about anyone running 30 psi DAILY on a stock bottom end and have the motor live more than 3 months.

To the thread starter, My suggestion to you is not to waste your money building a k20a3 block and just go and get you a k20a2 or k24a2. I stayed with a k20a2 becuase I think with boost it makes more than enough torque to break loose in 1st-4th. If your goal is to make 300 hp you can do it on a stock k20a2 block with ease! and it will be reliable. if you got anymore question look on Clubrsx turbo forum, or k20a.org..there is alot of info on those sites.

HFPcoupe
02-25-2007, 05:44 PM
nice to see everyone is all for boosting the k24. thats what i have and itll be boosted as soon as i get some sweet funds!

GNU
02-25-2007, 07:00 PM
wow this thread is retarded. PSI means nothing its turbo size, efficiency, cfm, ect.

JustinD
02-25-2007, 08:42 PM
i have heard that with the honda s2000 valvetrain the car will rev to 10k repeatedly and reliably


wow ? no way.

changing valve train is not the sole thing required to rev a motor like that.

some FULLY BUILT motors cannot rev to 10k +

EPthree04
02-25-2007, 10:54 PM
maybe full s2000 rotating assembly with fully built head. but you need a pretty built bottom end to handle those kinds of revolutions.

Mike
02-26-2007, 10:09 AM
The ignorance in this thread makes my head hurt!

JustinD
02-26-2007, 12:10 PM
The ignorance in this thread makes my head hurt!

me too !

why would an S2000 full rotating assembly fit inside a kseries motor ?

do you put a h22 rotating assembly in a b18 ?

for one, who the fuck cares if you rev to 10k ? it doesnt even matter.

for two, it takes ALOT OF FUCKING MONEY to do it. not oem parts. period.

honduh_head
03-05-2007, 04:08 PM
584 hp stock block k20a2 on 25 psi
http://www.k20a.org/forum/showthread.php?t=22473

onefst91hatch
03-05-2007, 04:29 PM
584 hp stock block k20a2 on 25 psi
http://www.k20a.org/forum/showthread.php?t=22473

???? i dont thik so bro.... a stock k block couldnt handle that! no way!! HA i told you guys it could be done!!! but i dont know anything and my posts smell like shit!!! to all the guys who doubted me!!!!! SUCK MY BALLS!!!!!

honduh_head
03-05-2007, 04:30 PM
you're welcome ;)

onefst91hatch
03-05-2007, 04:32 PM
you're welcome ;)

:thumbup: thanx bud

SSMdc5
03-05-2007, 06:38 PM
well props to that dude but i wonder how long itll last him.

RhdRicheeee
03-05-2007, 07:04 PM
30 psi on a stock aluminum sleeved motor!? I don't think so.

Mike, Your WRONG.

The motor will take 30 psi. For about 2.1 dyno pulls until explosion....lol

ahhhaah omgggggggggg


just ask B16offuryz his car blew up at LOCASH RACING

but kindly locash JOE did give him a free 40oz of old english

KOSSLO
03-06-2007, 07:09 AM
ok i didnt really know where to ask this question but i am trying to decide whitch is best to put on my car . super charger or turbo . i need it to be still a daily driver but i want go fast too and reliability now i do know the basic difference between the two, turbo build pressure and gives boost , while super charger produces power through the whole power range (correct me if i am wrong ) but which one would produce the most ,and realiable dependable ,and most configural power ........

Mike
03-06-2007, 09:53 AM
???? i dont thik so bro.... a stock k block couldnt handle that! no way!! HA i told you guys it could be done!!! but i dont know anything and my posts smell like shit!!! to all the guys who doubted me!!!!! SUCK MY BALLS!!!!!

It'll blow. It'll blow.

SSMdc5
03-06-2007, 10:53 AM
ok i didnt really know where to ask this question but i am trying to decide whitch is best to put on my car . super charger or turbo . i need it to be still a daily driver but i want go fast too and reliability now i do know the basic difference between the two, turbo build pressure and gives boost , while super charger produces power through the whole power range (correct me if i am wrong ) but which one would produce the most ,and realiable dependable ,and most configural power ........

Ive never ever told anyone this so this will be a first. Search and you shall find your answer.:)

KOSSLO
03-06-2007, 11:12 AM
lol figures

honduh_head
03-06-2007, 11:16 AM
superchargers won't net as much power but they are slightly easier to tune and argueably have a better power band....i say fuck em both and go all motor....nothing like 280 hp allmotor right justin?

honduh_head
03-06-2007, 11:18 AM
well props to that dude but i wonder how long itll last him.

we'll never know since some dickhead t-boned him when he test drove it off the dyno...the set up is going into something else though i think....

SSMdc5
03-06-2007, 05:25 PM
lol figures

ok here you go. You will never make as much power with a SC as you will going turbo. Bottom line. As long as you have a good tune and make sure you keep up on the turbo(plugs, oil, fuel, etc) it can be just as reliable. The SC has no lag at all, but your top end suffers. Are you looking for a straight line killer or road racer. If you are a 1/4 mile guy i would go turbo, if not then a SC. I hope i help you a lil even though i was brief.

91integrs
03-06-2007, 10:37 PM
???? i dont thik so bro.... a stock k block couldnt handle that! no way!! HA i told you guys it could be done!!! but i dont know anything and my posts smell like shit!!! to all the guys who doubted me!!!!! SUCK MY BALLS!!!!!

Well I guess I'm sucking on some sweaty ball meat tonight. Since you just said K20A and this thread is about building an A3, I thought you were referring to a A3 running 30psi, not an A2. Sorry for pointing the brown finger at you.

Mike
03-07-2007, 07:11 AM
The A2 and A3 use the same basic block design with the same sleeves. The A3's rods are a little less beefy, but both have been able to handle high boost numbers for a short period of time.

The argument in this thread was to build a reliable turbo'd motor, and 30psi on a stock block is not that.

That guy built that car, knowing that A2 is going to blow, he is building a 2.4 on the side, just waiting for the day.

KOSSLO
03-07-2007, 07:40 AM
thnx for the info does anyone here in the forums have a SC on thier EP3 and do they like it ?

allmotorgsr
03-07-2007, 09:35 AM
lol...

yeah, a k20 on 30psi and C16 would be in the 500-600 hp range if tuned properly. And if NOT tuned properly, it would blow the fuck up.


dude wuts with all these psi numbers? its just a number, and it means nothing unless we know the size of the turbo. throw 30psi of boost at a motor form a gt42r and then 30psi at a motor from an 18g and tell me which makes more power, haha. and ur goal is 300whp? no prob, good tune, stock block.... all day long man. just get a turbo that will fit ur application, and dont set your mind on a psi range u want to run, make a power goal and use as much psi u need to make that goal. But ima have to agree with GNU on this one....... sleeved k24, GT35r powered= sex:blunt: gl man

ikon671
03-08-2007, 10:23 PM
60-1hifi with a CN manifold will net you that power at 8 psi easy!! but if you want more go full-race or AFI...

EPthree04
03-08-2007, 11:22 PM
me too !

why would an S2000 full rotating assembly fit inside a kseries motor ?

do you put a h22 rotating assembly in a b18 ?

for one, who the fuck cares if you rev to 10k ? it doesnt even matter.

for two, it takes ALOT OF FUCKING MONEY to do it. not oem parts. period.

i could have swarn that spoon sports threw an f20c rotating assembly in a k20a. maybe im just a crackhead tho. im not trying to sound smart at all because i dont know that much about building engines. just saying what i have heard that has been done.

EurospecUSDMtyte
03-09-2007, 06:43 AM
i could have swarn that spoon sports threw an f20c rotating assembly in a k20a. maybe im just a crackhead tho. im not trying to sound smart at all because i dont know that much about building engines. just saying what i have heard that has been done.

They did and your not dumb,

honduh_head
03-09-2007, 07:46 AM
i could have swarn that spoon sports threw an f20c rotating assembly in a k20a. maybe im just a crackhead tho. im not trying to sound smart at all because i dont know that much about building engines. just saying what i have heard that has been done.

they did but if i remember it was just the pistons since they are forged and higher compression in a k series block

RSX King
03-11-2007, 01:21 AM
you can run 14-15psi daily provided you have a good tune.. I can't recall hearing or reading about anyone running 30 psi DAILY on a stock bottom end and have the motor live more than 3 months.

There has only been one stock block last more then 3-5 mounths and it was rubens... The guy who made your battery hold down... But yah it dumb to do...

JustinD
03-12-2007, 05:02 PM
i could have swarn that spoon sports threw an f20c rotating assembly in a k20a. maybe im just a crackhead tho. im not trying to sound smart at all because i dont know that much about building engines. just saying what i have heard that has been done.

they only f20c or f22c parts people use in a K series is the Crankshaft (which requires a snout modification to work with the k series timing chain) and the valve train.

no pistons or rods.

an f22c crank modded to fit in a K block will require custom rods and pistons.

honduh_head
03-13-2007, 10:31 AM
they only f20c or f22c parts people use in a K series is the Crankshaft (which requires a snout modification to work with the k series timing chain) and the valve train.

no pistons or rods.

an f22c crank modded to fit in a K block will require custom rods and pistons.

i know for a FACT that spoon used s2k pistons in their latest Spoon 4 dr si...

http://www.hondatuningmagazine.com/features/0702_ht_spoon_honda_civic_type_r_sedan/specifications.html

there you go!

h-vtec
03-13-2007, 05:58 PM
spoon has a hatch that revs at almost 13 g's saw it in person at leguna seca in florida :)! it was a le mons race in 01. it is a ctr dont know what it has or how they did it if u want to rev high call spoon or look it up :)!

honduh_head
03-14-2007, 09:09 AM
spoon has a hatch that revs at almost 13 g's saw it in person at leguna seca in florida :)! it was a le mons race in 01. it is a ctr dont know what it has or how they did it if u want to rev high call spoon or look it up :)!

its called a $25k motor...huge cams...high compression and balanced with in a fraction of a gram...and like a 100 hours of tuning...thats how :)

h-vtec
03-15-2007, 12:41 AM
yaaaaaaaa :)! makes me go nuts those things r so fast damn! they sound really high pitched when they take em that high its nutz but shit u can take first gear to like 60 :)! LMAO! those things have crazy ass tunning done to em....

06Dc5
04-09-2007, 05:01 AM
There are plenty of cars that redline at 10-12 like the mugen b18c but there is no way in hell it will handle boost, as for 14lbs on a stock motor i wouldnt try that toss some rods and pistons in there and a block guard and a good fuel system with k/pro and a good tune you will be fine if your goal is 250-300 you can hit that on 10lbs of boost plenty of base rsx's have done it on clubrsx and i know a ton of ep3's have done it (stock internals) lol about the redline i forgot to mention rotarys!

boostedlude3g
04-10-2007, 10:49 AM
Sounds like he would be better off building a k24 if he wants big, reliable power. If he is just wanting 250ish whp a super charger on the stock k20 would be the best thing and cheeper.

DJ Nu2U
04-14-2007, 07:27 PM
When i first got my EP, I set my rev limit @ 10K and it was fine...but after building it & pushing only 10 lbs. of boost for a month, it went to crap. So I ditched to A3 and got a K20A and removed the rev limiter and boosted 20lbs. But i never rev'd it past 9k... It is just cheaper and better in my opinion to ditch the A3...also IMO, it is the modern day D series poo... get an A2 or K24...or K24 block with A2 head maybe :blunt:

JustinD
04-14-2007, 08:06 PM
When i first got my EP, I set my rev limit @ 10K and it was fine...but after building it & pushing only 10 lbs. of boost for a month, it went to crap. So I ditched to A3 and got a K20A and removed the rev limiter and boosted 20lbs.

lol, no you didnt.

for one thing the a3 would never take 10k rpms. and 2 you dont boost 20lbs on a k20a that has 11.5:1 compression.

why do people post BS like this ?

EPthree04
04-14-2007, 09:39 PM
lol, no you didnt.

for one thing the a3 would never take 10k rpms. and 2 you dont boost 20lbs on a k20a that has 11.5:1 compression.

why do people post BS like this ?

haha i laughed pretty hard at that also. lol a3 at 8.5k rpms is pushing it :tongue:

JustinD
04-15-2007, 08:34 AM
haha i laughed pretty hard at that also. lol a3 at 8.5k rpms is pushing it :tongue:

yeah ... pushing like MANY people have blown them up with a2 head swaps ONLY revving to 8k-8.5k

honduh_head
04-20-2007, 02:28 PM
haha