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no compression, low compression......whats the difference haha

Old 03-20-2008, 02:29 PM
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Default no compression, low compression......whats the difference haha

anybody ever seen anything like this before? this car, sometimes, has no compression. turns over 200mph and wont start, sounds as if there is no timing belt on it. when he dropped the car off the first time, it wouldnt start most of the time, was showing under 100psi of compression in 3 cylinders and under 10psi in 1 of the cylinders. had him come get it so he could fix it, he purchased the motor used and it was brought to us to load a program, get it started, and tune it.

he couldnt figure out what was wrong with it, but since it started he decided he wanted to go ahead and try to tune it. since he has another motor, he figured what the hell- see what it would do


once you get it started and keep the rev's up for a second everything seems fine. shut it off and let it sit, it will have no compression again. sometimes it fires up easily, sometimes it doesnt.

the only thing i can think is something is up with the rings?


you would never guess anything is wrong with it looking at the dyno chart. stock sleeve b16, stock cams, 60-1 turbo, turbo manifold i made (first one i ever made way back when), hondata s200, 750's, 3 bar, edelbrock manifold---- i used my dyno NLR AMS-1000 for boost control-- 15.5 psi

Old 03-20-2008, 02:33 PM
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Default Re: no compression, low compression......whats the difference haha (Turbo-charged)

did you leak it down?
Old 03-20-2008, 02:37 PM
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Default Re: no compression, low compression......whats the difference haha (miller)

when he originally picked it up i gave him the option of us diagnosing it (leak down) / fixing it or him doing it. he has a full shop/lift at his place so he said he was going to do it.


he just wanted me to tune it the way it was, and he knew the risks involved so we just went with it
Old 03-20-2008, 02:47 PM
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Default Re: no compression, low compression......whats the difference haha (Turbo-charged)

kinda sounds like the rings are washed....but the fact that it does it repeatedly...idk, possibly dumping way too much fuel at startup?
Old 03-20-2008, 02:49 PM
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Default Re: no compression, low compression......whats the difference haha (philafelman)

yea its weird, and somewhat intermittent. he's going to try to put some miles on it to see if it cleans up, if not freshen it up.
Old 03-20-2008, 05:02 PM
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Default Re: no compression, low compression......whats the difference haha (Turbo-charged)

wtf that is crazy and the fact that it made that much power with under 100psi in the cylinders when it had compression
Old 03-20-2008, 05:33 PM
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Default Re: no compression, low compression......whats the difference haha (Turbo-charged)

maybe valves adjusted to tight ? or a bad valve in the 10 psi one , or washed rings , just throwing some ideas out there
Old 03-20-2008, 05:51 PM
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Default Re: no compression, low compression......whats the difference haha (Turbo-charged)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Turbo-charged &raquo;</TD></TR><TR><TD CLASS="quote">yea its weird, and somewhat intermittent. he's going to try to put some miles on it to see if it cleans up, if not freshen it up.</TD></TR></TABLE>

Joe-

i've seen something like this before.

the rings were actually "glued" into the pistons with the "indian" headsealer that the engine builder used. the excess headsealer seemed to have leaked down into the cylinder walls and on the rings...

Ken
Old 03-21-2008, 09:12 PM
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Default Re: no compression, low compression......whats the difference haha (PeakBoost)

hey joe this is coreys car correct with aj's old set up do u remember what psi aj was running for high boost ?? just wondering because the 20 whp diffrence in the exact same set up


Modified by civicgeek133 at 10:28 PM 3/21/2008
Old 03-21-2008, 09:23 PM
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Default Re: no compression, low compression......whats the difference haha (civicgeek133)

i dont remember- im pretty sure aj was running a hair more boost

i have a little more tuning experience since the last time i tuned aj's car. that was a long time ago

ken--- we had a rb26 come to us that was 100% seized from that stuff! btw, the last 2 peak boost manifolds we have used have looked an exceptional amount better than the previous ones- keep up the good work (my period button doesnt work most of the time)
Old 03-21-2008, 09:32 PM
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Default Re: no compression, low compression......whats the difference haha (Turbo-charged)

this is joe btw the guy who gave u that single cam motor and the dizzy for the white eg hatch . would u be able to tune my golf with APR's adjustment software its like lemiwinks or what its called just fine tune it , after the apr ecu flash ? i got the software its a small and simple program ... u and brad are the only 2 i will let tune my car
Old 03-21-2008, 09:35 PM
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Default Re: no compression, low compression......whats the difference haha (civicgeek133)

oh whats up dude. that dizzy didnt work but thanks anyways lol


we can mess with it, i'd like to look at the software first. since its a VW, i assume absolutely no responsibility if it blows up hahahahahahaha

who is jlb motorsports? never heard of them
Old 03-21-2008, 09:39 PM
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Default Re: no compression, low compression......whats the difference haha (Turbo-charged)

yea i dont trust how vws are all ran off the same tune depending on which injectors ur running i know all cars act diffrently so i want u to make sure its making the most it can ...... and the teg looks sick now i love the color came a long way since when u first got it

its a virgina shop me and another guy use this SN he put that there i beleive its the shop that girl who had the DA with the pink valvecover comes ,from her boyfriend works there or somthing jeff knows who they are i beleive
Old 03-21-2008, 09:40 PM
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Default Re: no compression, low compression......whats the difference haha (civicgeek133)

if you have the software and whatever i needed to burn teh chips or however that VW crap works bring it by and we will see whats up


how did your girls evo turn out
Old 03-21-2008, 09:47 PM
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Default Re: no compression, low compression......whats the difference haha (Turbo-charged)

runs good seals in the 3076 are starting to go so holding off on the retune until we get the funds for a 35r also i need a motor to throw in my rex got any stock long blocks laying around single or dual i dont care


Modified by civicgeek133 at 11:00 PM 3/21/2008
Old 03-22-2008, 12:04 PM
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Default Re: no compression, low compression......whats the difference haha (civicgeek133)

i have a rsx at the shop right now that does the same thing.. will start and idle fine... turn it off and then try to start it again and it has a miss.. do a compression test.. 3 are at 200 psi and 1 is at 0. try it again in like 15 min and all cylinders are at 200 psi and the car will start fine.. i dont get it
Old 03-24-2008, 01:39 AM
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Default Re: no compression, low compression......whats the difference haha (.CUBISH.)

yeah my car is a problem child sorry for the headaches joe!! at least it made decent power. so I'm hoping it all comes out okay once i work some miles into her
Old 03-24-2008, 02:33 AM
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Default

My accord had the same problem. Ran perfect sometimes and then it would never start and if it did it would run on 2 cylinders until I gave some gas then it would run on all four. Then over a few months it finally blew up and after taking it apart, it was the rings that weren't positioned and measured correctly and the tuning of course.
Old 03-24-2008, 07:53 AM
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Default Re: (rhdune16)

welp if that happensto mine its a damn good thing ive got another B16 layin around
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