phelpsj2

Should i build a d16z6 or y8 for boost. im currently running a d16y5 so im obd2..how diffucult is it to convert to obd1 if i decide to go z6?

arkomandos

for me,,,DZ16 Z6,,with aT25 or 28,,,mine is a T25garrett,,10:5:1,,,I had a little problem with mine cause it was overheating a little but,,got a better fan and a racing thermostat runs like a dream now,,,,will put it on a dyno next week,,,looking at around 8-11lb,,,200HP range,,,,

chewyv

if your gonna build it then its not gonna matter.

JDM_SOHC

Actually it does matter... Z6's are known for having a better oil system, especially for boost... I've read so many horror stories on here of people with Y8's and their oil pumps failing, needing to be shimmed, etc... Not many people take this into consideration when going "fully built" when in-fact it's something that should definitely not be over looked... If you're going for built/boosted I'd say either JDM D15B or D16Z6... And no, converting your car to obd1 is about a 5/10 on a skill level measurement... Just do some reading up first and make sure you understand what you're doing and you'll be fine... It's one of those things that when you do it once, you'll remember it for a while... GL..

phelpsj2

x2 ^ ya thats what i like the oiling system is better..don twanna be spinning bearings everyweek lol....im probably just gonna build the bottom end for now. i can get around 250whp with the stock head for now im sure....ya im not worried about how hard it is im really good with everything and wiring too...im sure ill figure it out..anyone know of any good write ups for the conversion?

JDM_SOHC

Myself along with several others were wayyyyy beyond that on a stock Z6 head... Just a lil FYI for ya... I wanna say you can safely venture into the 350hp range on a stock head, some have even snagged 400 on stock heads... Just food for thought, good luck..

SCerbanger

Z6 All the way buddy the Y8 dose have a weak oil system but you can fix that with a mod to your pump.. I run a D15B and also did this mod to my pump.. my oil hit 100psi when vtec kicks in. I run stock sleeve, vitara with fjr D15B rods, stock cam with BW springs and retainers. My tuner said if i sleeve my block i can get 450 plus but right now i have 350 to wheels Gt28 turbo. Im very happy with my setup.

phelpsj2

ya thats plenty for what i want.

this is my setup im planning on running....

d16z6

9:1 pistons....dont know what brand yet......(inputs welcome)
eagle H beam Rods
Stock head
550cc injectors
255 walboro pump
T3/T4 50 trim .48 a/r
cast iron log manifold
hks boost controller andturbo timer
p28 chipped. tuned on chrome...or hondata s300..but i think ima just get the chipped p28 for now so i can get the car on the road
hks bov
tial 38mm wastegate


should i upgrade the fuel rail and regulator or is it fine for 250whp -300whp?

JDM_SOHC

That's almost the identical setup I had when I was @ 238hp at 9psi...

phelpsj2

ya i wanna run about 15 psi im lookin for between 250 and 300 whp..when was ur turbo spooling? when did u hit ful boost?

SCerbanger

Sounds great just make sure to use ARP studs for sure, Your rods have ARP as well so just get head bolts and FPR you need a adjustable FPR. P28 Chiped is good for 350-400hp no need for S1 2 or 3 right now. You forgot to list a LC1 wideband kit and moates emulator.. who is tunning this beast? If you are street tunning invest in the emulator, what it dose it lets you save/burn new maps and any fixes you make when you tune it instead of pulling the chip and burning new files.. Dont let anyone tell you wrong tuning is easy if you know what a fuel map is.. just add more fuel and retard the timing its that easy. PGMFI is a great site to learn about boost and tuning.. good luck.

phelpsj2

im gonna get it tuned by central florida turbo..there really good i hear...they do have floridas fastest civic...and yes i forgot to mention the head studs those are a must for sure.

apexi_rsx

from what i found when i tore my old y7 down was that the z6 has 2 oil ports for the rods and the y7 and y8 cranks have 1. im running a y8 oil pump on my z6 with no problems so i dont blame it on the oil pump even though i did find the gears inside the z6 oil pump are bigger.

phelpsj2

ok...btw what intake mani is better the y8 or z6...the y8 intake chanber looks alot bigger imo than the z6...if i keep the y8 intake mani on the z6 does that mean i dont have to rewire the injectors since they8 uses the obd2 injector harness on its fuel rail/

Nichelson_Performance

yes i was going to state this but you beat me to it lol

the oil pumps are not the problem in the y8's, it's the oiling holes in the crank, i don't know why everyone pinpoints oil problems associated with y8's to the oil pump cause it's not

i ran 2 straight years on a stock bore vitara build that started on 16psi and ended up being retuned on 20psi putting me well over 300 at the wheels before i had problems, and it had NOTHING to do with the OIL SYSTEM. i ran a stock pump with 98,000 miles, NO SHIMS or any other modifications done to the pump

i think the problem that most people have with builds is that most people are inexperienced at engine building and don't plastigauge any of there clearance or inspect the journals or torque the rod bolts correctly

one other and the MOST common failure of an engine is people don't know when to let off the throttle or pay attention to their gauges..........you can have the most reliable built engine in the world balance and blueprinted and everything else, but if you run the thing at 8,000+ rpms for anything over a mile or continously beat on it at every redlight you come to and yeah the thing is going to blow

i will testify along with many other y8 owners that they can be build to withstand everything a z6 can take

also just wanted to point out that a built z6 is not the most reliable of single cam engines. do some research and you will find the d16a6 has one of the toughest built bottom ends but without a vtec head

D Griff

The Y8 is the best D series intake manifold. I believe you can just use a fuel rail from a Z6 with your Y8 manifold, someone confirm this though.

Nichelson_Performance

the y8 has the best flowing intake mani and the worst flowing head lol go figure

also you have to rewire the injectors anyhow because you will need more fuel for turbo so atleast dsm 450's will be needed as well as a resistor box

phelpsj2

well im using rc 550cc injectors...right now i have a d16y5 im swapping in the d16z6 and im gonna use a y8 manifold...so wont the injectors just be plug and play since im obd2 now and ill be using the y8 manifold which is also obd2. illl just have to rewire the dizzy.

arkomandos

get BRIAN CROWER or CP,,,,

Nichelson_Performance

yep should be plug and play. you will still have to convert to obd1 in order to be tuned no matter if you are keeping the y5 or z6 if you want to make safe reliable and fun power lol, but that's why people make jumper harnesses so that way it's easy to convert but just make sure you get the right obd2-obd1 jumper harness

96-98 you will need obd2(A) to obd1 jumper
99-00 you will need obd2(B) to obd1 jumper

arkomandos

for pistons get either Brian Crower or CP,,,,
do you want a manual boost controller or electric,,,mine is manual but,,is it really worth paying about 150$ more for the electric one,,,
all the other parts you want are the ones I have,,,,except for the wastegate and the tune you want,,mine is eCtune,,,,

JDM_SOHC

Yeah if you wanna spend $600 just on pistons you could get CP... I had Vitara's with custom FJ Distributors I-Beams that I got as part of a Bottom End kit for $600...


And you don't need a FPR if you're going to be chipped/tuned on Crome... It's always easy to tell someone else to spend money, I'm tryna save you a couple bucks... I have quite a few friends with this same setup runnin 10's and well over 400hp... And I had a garrett t3t4 hybrid, so my full boost was about 4k rpms it pulled hard as fawk all the way to 8200...

phelpsj2

ya im trying to do it righ tbut not spend a fortune...even though i would love to build everything i dont think its neccessary..ima build the bottom end keep the stock head. upgrade fuel injectors fuel pump keep stockfuel rail. yada yada. lol

D-Rizzle3

That's a great setup and a great deal. You can get over 350whp on a stock head for sure...

apexi_rsx

no you can not use a z6 fuel rail with a y8 manifold the z6 has 3 mount hold and the y8 has 2. they have differnt offsets. if u read u can cut off a nubs off the obd1 injectors and u can still use your y8 or y7 injector clips.