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Old Aug 14, 2006 | 09:18 PM
  #1  
'90 honda crx's Avatar
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Default d16z6 rebuild

hello everyone~! ive got a d16z6 that i got from one of my auto teachers.


this motor has been siting out side in the rain and there as no spark plugs so the cylanders got water in there. so they need to be honed. i beleave the motor only had about 80 to 90k miles on it before it broke down.

now this is my question for you master engine builders!
this engine sufferd a bent valve. i think he said it was from the v-tec silinoed (sorry about the spelling . went out or the timing belt broke. now would you guys think this engine is worth rebuilding matter the fact the damage that my have happend? i look at the top of the pistons and it looks like there's no damage from a valve hiting them.

i might be taking it to the mechine shop tomarrow to be honed and hot dunked.
after that i was going to buy new rings, main bearings, rod bearings and a hole new seal set for the block. depending on your guys veiw or idea's.

i have the block, pistons,rods crank, head, valves, valve springs but no roller rockers or cam.


what do you guys think i should do? any veiws or idea's are greatly appresiated.
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Old Aug 15, 2006 | 05:07 PM
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Default Re: d16z6 rebuild ('90 honda crx)

It might be rusted enough that it needs to be bored.

If thats the case use some P29 pistons in it.

If it bent a valve then the valve guide will need to be replaced.

If you're going to build it, might as well have some headwork done on it.

Don't worry about getting it done fast. The school year just started and you can impress everyone once Spring rolls around.
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Old Aug 15, 2006 | 09:30 PM
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Default Re: d16z6 rebuild (Aquafina)

are p29's b18 or 16? im not sure.

i haven't takin the valves out of the head to see if any got bent yet, ive only looked at the top of the pistons.

yep thats what i plan on doin, i have a friend that has a '74 chevy ss nova that i wana beat with my crx. but that wont happen untill i have enough money for a b16 or gsr swap.

i might build this engine latter for another crx after i get a b seires swap.
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Old Aug 15, 2006 | 10:26 PM
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Whoa dude, you need to do some research before you do anything else.

P29 pistons come from a D16, B-Series pistons are considerably larger.

Don't be so sure you need to jump on the B-Series band wagon to be fast. I beat a '69 Cutlass GS with the 350 by half a fender in my '91 Si hatch with a D16A6. It really pissed him off, too. I've also beaten a few dozen 350 powered trucks...rednecks everywhere. My Z6 build has considerably more power than my A6 did. I spent a total of $1500 on the build plus another $500-ish for the OBDI conversion.

And by the way, building a motor to be faster than your friend's car is kinda lame dude. Build it for yourself or you'll always be disappointed in the outcome because someone will always have a faster car.
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Old Aug 15, 2006 | 10:44 PM
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Default Re: (91SiZ6)

Forget the B.

REbuild the Z6 and do a killer transmission for it and you'll be set.
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Old Aug 15, 2006 | 11:53 PM
  #6  
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Default Re: (Aquafina)

ya i would really like to build the d16z6 into a turbo motor simply because its a very light engine and the parts are cheap. plus that would be ****** awsome because its a D seires engine! how gangster is that?! ive wanted to beat him cus he drives an old school muscle car that weigh's nerly two ton's, and show him the power of the inline 4 engine! but im thinking on building a b series engine for that. i know the d seires engine is capable of beating a v8. but i want the dohc v-tec. but also i like being unique. so may be the d seires is a good gound for me to play in. maybe?

ya i didn't know what the p29 piston's came out of. i looked on mine before i posted and they where p28's. any diffrence p28's from p29's, bore size more then likely?

i never wanted to build a motor just to beat my friend or beat anyone, i just would like a fast little car.i also would think it would be awsome to kick his ***. and i know theres faster car's out there. but right now im pretty drunk and i could be rambaling on. im just hopeing i can rebuild the d16z6 right now because the d16a6 thats in the right now is not in very good shape. it leaks tranny fluid like a sive and the rings are shot, because the guy never put a air flilter on it.

but anyways, i read a post that said, if you wana beat stock honda's build a d seires engine ( witch if you build a turbo engine i know you can kick some big 8v's asses easy)
but if you wana beat z06 corvettes and big v8 demestic's build a b seires.

im still drunk making this post. god damn i wish i was straight minded. ****!!

for me to complete this z6 engine i would need a stock cam or an after market one like crane or skunk. rocker's. a flywheel, snesers and all that bull ****.
sorry for the profanity.
ok ima stop takin and see what you guys think.
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Old Aug 16, 2006 | 05:18 AM
  #7  
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Default Re: ('90 honda crx)

Check your PM's.

You need to rethink your priorities if you are trying to build a Honda to take down "muscle cars."

Do a turbo setup, their expensive. You can do a junkyard kit but it will be cheap and you get what you pay for.

Do an all motor D. 160whp if you put around 3,500 into it.

Do an all motor B. 200whp if you put more money than above into it, plus the cost of the engine itself. Parts aren't everything though and I wouldn't waste a build using OEM clearances.

You're in highschool, don't worry about beating 40 year old guys in $40,000 cars. Just build something fun for yourself. When you look at this post in a couple of years you'll kick your own ***.
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Old Aug 16, 2006 | 08:49 AM
  #8  
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Default Re: (Aquafina)

i got your PM. it looks like a really good deal for a head job.


i just toke the block down to a local michine shop to have the cylenders honed and to be hot dunked. there going to call me if they need to be bored if there that bad.

if they need to be bored what pistons should i use or what size bore should i do? i would like to stay close to stock size, if not ill go for b16 size.

man i made a hella long post yesterday LOL! ya ive got my whole life to worry about beating fast cars.
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Old Aug 16, 2006 | 03:32 PM
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Stock D16 bore = 75mm
Stock B16 bore = 81mm

You can't use B-series pistons in a D-Series block. The difference between P29 and P28 pistons is that P29 pistons have a dome and P28 pistons don't. This takes your compression in a Z6 from a stock 9.1:1 all the way up to 12:1.

If you're getting the block machined anyway, might as well go to 75.5mm to ensure your cylinders are perfectly round. Wait until you buy pistons so the machinist can match the bore to the pistons for a perfect fit.

Ok, here's a build for you.

CP or Wiseco 75.5mm pistons (compression depends on n/a or f/i)
Tuner Toys rods (have to get the block notched for those to fit properly)
OEM Honda bearings
Gasket match port and polish
Three angle valve job
Ferrea valves
Comp Cams or Crower cam and matching valve train
Cam gear of your choice
Skunk2 IM if staying n/a or Edelbrock if going f/i
I/H/E of choice, depending on n/a or f/i

Bam, you now have a fully built motor and you'll easily spend $3k to get there.
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Old Aug 16, 2006 | 06:41 PM
  #10  
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Default Re: (91SiZ6)

I love the typical D-org builds people suggest.
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Old Aug 16, 2006 | 08:13 PM
  #11  
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Default Re: (Aquafina)

heh, i just got a noz kit from my brother. but i dont really like nito. its just i dont really know much about it but other then how it works.

but anyways i should be getting a phone call from the mechine shop to pick up the block and ill be goot to go.
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Old Aug 16, 2006 | 09:40 PM
  #12  
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Default Re: (Aquafina)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Aquafina &raquo;</TD></TR><TR><TD CLASS="quote">I love the typical D-org builds people suggest.</TD></TR></TABLE>

Didn't say it was anything other than a generic build. That's why I didn't recommend a compression ratio, cam gear brand, or i/h/e brands. It will make power, though. A lot of the builds on D-Series.org are proven.

Hell, my Z6 makes a good deal of power and it's not even that built.
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Old Aug 19, 2006 | 01:03 PM
  #13  
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Default Re: (91SiZ6)

i just realised that you said the it will bring my compression up to 12:1. now if it used a stock z6 ecu i beleave i would be running lean, am i correct? because it would think its still at stock compression and not 12:1.

what year did the p29 pistons come out?

dang that would give the motor a little more bite i would say.
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Old Aug 19, 2006 | 06:43 PM
  #14  
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You won't want to run 12:1 without getting it tuned a.s.a.f.p.. If you want to run that high, budget about $300-500 for tuning. Because yes, you'll run very lean and blow your motor up in no time at all.

If you're looking for P29 pistons, find user ID "guit-guit" on eBay and buy a set of Nippon Racing P29s from him. My avatar is my block with Nippon P28 pistons. But to answer your question, the P29 pistons that will raise compression are from the '88-'89 Integra.
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Old Aug 22, 2006 | 11:05 PM
  #15  
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Default Re: (91SiZ6)

i just got a call from the mechine shop telling me, he honed the cylenders and said they are in bad shape. i asked him if he did a .5 over bore would it fix the problem. and he said more then likely not, there still might be pitting left. and i dont want to pay 18 bucks per cylender just for the problem to still be there.

so im basicly screwed. any idea's?
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Old Aug 23, 2006 | 10:06 AM
  #16  
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Default Re: ('90 honda crx)

bump
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Old Aug 23, 2006 | 02:17 PM
  #17  
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Default Re: ('90 honda crx)

Get it re sleeved.
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Old Aug 23, 2006 | 02:18 PM
  #18  
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Find a different block? D16Z6 parts are all over the place and relatively cheap.
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