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ko3 on a d15b7

12K views 39 replies 13 participants last post by  EG-MIKE  
#1 ·
ok so ive done alot of research and havent found much on this....

i have a pretty much stock D15B7 in my 92 civic lx and i also have a ko3 off a vw 1.8t. i was thinking about running the ko3 but from what i've gathered the turbo will spool quick say around 1800-2500 rpm @ 10p.s.i and die out around maybe 4k rpm.
i wanna boost my car but im on a strict budget w/ the ko3 i can use stock fuel pump and injectors and keep the cost down quite a bit. but i dont think the turbo will support more then 150-170 whp @ 10 p.s.i and i'd like to get closer to 200 whp and have a little better range on the pull.
so i thought maybe go with the t25 but in maine where i live people are retarded and wanna charge upwards of 200 dollars for a t25 ( imo thats out of control ).

so i guess my question is has anyone here ever done a ko3 setup? also what kind of gains could i expect with what upgrades done with said turbo?
i dont wanna hear about how much of a p.o.s the ko3 is i know its tiny and all that im just curious about what i can expect from this. thanks in advance
 
#2 ·
use the k03, the b7 is small enough to take full advantage from it

would not hurt to do a fresh headgasket with ARP head bolts/studs if this is to be a reliable long-duration ownership in boosted status
 
#3 ·
the hg is fairly fresh its a metal gasket if that makes a difference? i dont have arp's but this is gonna be a temp setup prolly just for the summer and if things go wrong i have a spare b7 in my garage that just needs rod bearings.

next year i plan on building a z6 lower end and using that with the b7 head, i just wanna get used to boost before going all out.

does anyone know what kinda hp i can expect @ 10 p.s.i with this turbo? and what do you mean the b7 will take full advantage of the turbo wont it die out around 4-5k r.p.m ?
 
#4 ·
I wouldn't try for the 10 psi. With as fast as it can come in you'll likely spit a rod if not tuned very carefully.

I'm planning a K03 on a stouter D16.....
 
#7 ·
why, will that not be possible with that turbo 0n 7-10 p.s.i?
i dont really wanna scrap the idea, ill just give it a shot and see if i like it or not worst case scenario i dont like and take it off. i'll still have all my stock parts to put back on and then ill just save up for a t25 setup.

sux livin in maine theres not many options for tuners up here its pretty much a diy state and if you cant diy your looking at spend 5-10 G's to pay 1 of the like 2 places out here to do it for you. gotta love stupid ass emission laws and state inspections
 
#8 ·
your going to be around as quick as the car the turbo came off of, (170-180) and thats on no more than 7-8lbs to be reliable. HIGHLY reccomend what was mentioned earlier, headgasket and arp studs.
 
#10 ·
i have a k03 set up last year on my girlfriends 1993 civic dx on 12psi all year no prob had great low end power and was a blast to drive. for around i had it all tuned on stock injectors then i upped it to some dsm black tops just to get a safer fuel out of it. then i had a turbo issues the thing pushed a seal in it or something soi swaped it out and it is still going strong today. i know you were on a budget but i build a log and nice down pipe to keep th ea/c and p/s and well i loved it.

good luck

Image
 
#11 ·
so if i go with a new head gasket should i get the stock metal gasket or get say a y8 head gasket or something ?
and some say 7-8 p.s.i and then EGBUDDY says he actually has the same setup on 12 p.s.i and has been running it for over a year.

i have a couple question's for EGBUDDY, what mods did you do to run 12 p.s.i safely? did you need a new map sensor? have you got it to a track or dyno, and what kinda numbers did you put down? what kinda problems did you come across with the install?

i plan on using an hf manifold and just making an adapter plate for it. also i'll be fabbing my own down pipe. i no longer have a/c i removed it however i still have p/s.
 
#12 ·
honestly i never put it on a dyno and never seen a track no need for it my girlfriend drives it daily and i did the turbo just for a bit mre power the motor is stock really only mod is new headgasket and a jdm d15B head i had sittin around. stock mapp sensor dsm 450. had a wide band in it when i tuned it now it is out all costom built manifold and down pipe 2 1/4 exhaust with flow master muffler. it pulls great can burn up second gear. on the high way it fall off power at high rpm say 5500 maybe but i dont push it.

i did all this mainly for a small boost in power not a race car i tow a trailer with teo quads andd well hills sucked with out the turbo now it pulls so much better no struggle.
 
#13 ·
EGBUDDY- what program do you have it tuned on(ie crome,uberdata.etc.etc.)? did you have any problems with the stock injectors?
did you run the coolant lines or just use oil to cool it?
could you post some more pics of how you ran your plumbing?
you must have a boost controller, i believe the stock internal waste gate on the ko3 is set at 8 p.s.i?
what intercooler did you use the the VW one ? (thats the one i plan on using)
im really interested as your the first person ive found to actually be running this setup.

thanks for answering my questions its a great help
 
#16 ·
i running a small ebay intercooler. with a boost controler and ttuned one crome with stock injectors was not hard and same with dsm 450.s just had to wire in a resistor box. and for pipe i just made some i do my own fab work so it was not to hard. i did not run any water lines. and as for power well it make fun power you can fell the turbo fell off at about 5500 rpm but it did not fall on its face it still pulled ok i dont reve my stock motors to the moon like alot of people do and cry they spun a bering and dont know why.lol

and well i am prolly the only other person that used a k03 i posted on here and a few other site befor i did and and well every one said dont waste you time and i was the same as yo ui owned it for free and i wanted to try it and i did and it worked out GREAT for my goals. and reliablity is great only reason i blew one turbo is because the stupid dsm bov i used craped out then switched to a typeS and was and still am good.
 
#20 ·
Have a TD04 9G would you say this is smaller or larger than the K03
tried looking at the maps but there are so many maps for the K03 it gets confusing.
What is the Max CFM rating of your K03 ?

I say go for it. Low boost motors can be a lot of fun.
I dont see any reason why the engine should choke. After 5500 RPM you can just waste gate it and rev on.
 
#22 ·
been reving to the moon for years now bro on a real turbo and nothing spun=) but be a noob and put that worthless turbo on there. you are wasting your time. bet it wont be any faster. maybe half a sec until it blows up like tranzx said from boost so low in the rpm. just trying to get you to not waste ur time. Sell that pos and get something bigger!!
 
#24 ·
i find it funny how you call me a noob, yet you talk about revving to the moon? i'd like to see your setup, list all your mods what p.s.i your running on what turbo. also if you have any track slips or dyno slips.

and EGBUDDY thanks man.

if i dont like the ko3 setup, i'll take it off my car and put it on my dirt bike.
i dont see it blowing my motor in my car, whats the diff between being higher or lower in the rpm's ? you'd think it being lower in the rpm's would be safer then higher in the rpm's
 
#23 ·
do what ya want to do mean if i listen to the 100 people that told me not to do it the car still would be a slug and i would be turboless on it but insted it cost me about 100 bucks to intall it and its been great since there is alot of power gain over stock and it pulls my trailer with three quads like a champ.

and if i want to have faster turbo car i can just drive my crx that has a lot bigger set up on it. good luck any other qustions i can help with pm me
 
#25 ·
:popcorn:
 
#32 ·
ok i get it. thanks for explaining....

so i guess ima go with the ko3 for a lil bit just to have a lil fun then once i get some money together ill go with a t25 or perhaps a 14b to get used to high rpm boost. then from there im gonna build a motor and try to hit some good numbers

and EG6 i dont think your hatch falls under a D anymore lol altho it is pretty nasty.... btw how the hell did you find me on here?
:3dtard:
 
#34 ·
14b and t25 aren't really much bigger than a k03, and you will have to get a new down pipe to run either one of those after a k03 as well as slightly different ic pipe connection at the compressor.

If I were you, and this is only a suggestion, heed the advice that has been given, and figure out how much power you want to make. I understand the difference between free/cheap and dumping more money into it. I just think you will be happier in the end if you do it right.
 
#37 ·
yeah i know i'd need a different down pipe and such. but i can fab all that shit myself .
as for the second part i'll only be looking to hit 200-220 whp until i can get a z6 bottom end build it, or build my b7 bottom end ( which would cost alot more then my z6 idea i think )

Portland? Or near there? Take your ass across state lines. Basemap that bitch to someone that can do it. Bean-town is around 100 miles from you? Guarantee there is at least one tuner around Boston.

Tuning isn't cheap. It is however, the most essential aspect of boosting your ride. It is all for nothing if you don't tune.
yeah i live somewhat close to portland . like 15-20 minutes south of portland
i found a place in mass that it's $75 for 3-4 passes on the dyno which isnt really that exp. imo
 
#35 ·
nice... yeah i figured i might be able to find some cheapish parts over here from everything i've heard this is the place to be.
living in maine is retarded when it comes to tuning everything is way over priced. at least for me cause im a broke bitch lol.
that and i dont even know of a dyno shop in southern maine.
 
#36 ·
Portland? Or near there? Take your ass across state lines. Basemap that bitch to someone that can do it. Bean-town is around 100 miles from you? Guarantee there is at least one tuner around Boston.

Tuning isn't cheap. It is however, the most essential aspect of boosting your ride. It is all for nothing if you don't tune.
 
#38 ·
so i've had a z6 head on CL for a couple weeks now and i just checked my email and was stoked to find that someone is interested in trading a t25 with the down pipe and all lines and hoses .
hopefully he ends up doing it if so i'll be going that route. only downfall to that is ill need new intercooler and piping, new injectors, a walbro 255, and a few other misc. things. hopefully i can find what i need for super cheap. i'd like to keep the turbo build under 3-400 if possible. once i get enough posts ill be able to look around on the classifieds on here maybe find some stuff. :pinch: