d-series compression
 

just ran a compression test on my car and this is what i got:

200 200 210 200

now i'm glad they're all fairly close, but i was wondering if these number are too high (carbon buildup) or too low for a d16z6. hopefully this will handle the boost thats coming in the mail well http://images.zeroforum.com/smile/emsmile.gif

Re: d-series compression (Pengo)
 

how did u do ur compression testt??

i only got like 165 to 170 arcross all cylinders

Re: d-series compression (xbird)
 

car was already warm. pulled fuse for fuel injection out. took out all spark plugs. screw tube into spark plug well, attach to gauge (i have the quick release one). with clutch and gas held down all the way, crank engine 5 times. i was doing like 8 cranks cuz i read from somewhere else to do it that many times, but then some places said 5, and my friend who was watching the gauge always stopped me at 5-6 cranks anyway cuz the needle already settled. repeat same for all other cylinders.

the ones that got 200 for me were actually exactly on 200 on my gauge, and all were definitely over 180 and under 210

this on a d16z6 with 80,xxx miles and constant maintanence. oil changes every 1000 to 2000 miles

Re: d-series compression (Pengo)
 

so is this decent or what? http://images.zeroforum.com/smile/emthup.gif

Re: d-series compression (Pengo)
 

Did a test on a car I was gonna buy and here is approximtely what I got:

120 130 145 140

This was a d16z6, and needless to say I didn't buy it.

Re: d-series compression (JMU1337)
 

i was running 225-250 in each on my mini me, so that sounds ok

Re: d-series compression
 

i have a d15b7 3xx,xxx miles, 92 civic lx 4dr, 195, 200, 200, 192 dry comp test, injectors pulled as well as fuse and pumpo kill switch, all plugs pulled, WOP 3-5 cranks....

Re: d-series compression
 

200 is very good.

Re: d-series compression
 

thats a very good engine you should be glad as for a turbo look up specs for the compresion ratio, a compression test doesnt tell you any thing about compression ratio, it's somewhere around 9:1 d series dont go past 10:1, good for a little boost

Re: d-series compression
 

Z6 has 9.2

Re: d-series compression
 

My d15 was 150,180, 150, 150 when I got it. your numbers are great

Re: d-series compression
 

i'm going to rebuild it this winter, get a rebuilt shoc non-vtec head, and then turbo, custom stronger rods, a6 cam, y8 head gasket. 10lbs boost

Re: d-series compression
 

that seems really high i think its supposed to be at like 135 or something. mines low its 114 in 3 cylinders and 107 in cylinder 1

Re: d-series compression
 

cause your car is running like crap right? probably smokes.
OP 200-225 is normal for a z6. 185 and below means the motor is getting tired and will possibly need rings soon.

Re: d-series compression
 

you are on the verge of having catistrophic failure or just having your motor die on you in the near future. it take a MINIMUM of 100 PSI to create combustion and burn fuel. below that you will develop a dead cylinder, have predetination and ruin pistons. being 7-14 points above that is not good.

Re: d-series compression
 

yea that motor is pretty wasted.

Re: d-series compression
 

That's a pretty healthy D!

Re: d-series compression
 

Why are you gonna rebuild it and why not a vtec head?

Re: d-series compression
 

if the motor is the healthy then there is no point in rebuilding it. If you want to build the motor I would say to either sell the block that you have and buy another one to build it (since yours is so healthy) or sell the pistons/rods after u take it out.
But since its so healthy you could boost it and make 200WHP with no problems and not worry about it.

Re: d-series compression
 

i have a d16y8 tho. what does the manufacturer say the compressions supposed to be at?

Re: d-series compression
 

no idea. But it should probably be around that of a Z6.

Re: d-series compression
 

i called honda and they said it should be around 170 and minimum at 120...****!!! i was gonna buy new pistons anyways but how much you think itll cost to get them installed and machined at a shop?

Re: d-series compression
 

idk, i know the machine shop i go to charges 10 per piston to put pistons on. Idk how much for rods.

Re: d-series compression
 

non-vtec gives me delivery of power all throughout the rpm range with these motors i believe it to be more benificial to go non-vtec for boost.

Re: d-series compression
 

no it does not. non-vtec motors are more suited to lower end power. That is the whole point of VTEC. To have regular cams for low-mid range power and VTEC cams for high end power. VTEC also helps you spool turbos because the cams are more aggressive when VTEC activates.