OK, so I attended Nopi this past weekend in Baytown and we could tell just by the trap speeds that the car wasn't making the power that it should have been. We dynoed it 2 weeks ago and it made 415.22whp/257.61ftlb of torque @ 17lbs with 11.8.1 AF and 18 degrees of timing and 100.54 degrees outside with the GT35E. The only thing that I have changed since then was oil, spark plugs, and put a ACT 6 puck in there. A month ago at a local track I ran a 12.483 @ 117mph with a 2.067 60ft time with only 370whp. This weekend I ran a 12.396 @ 113.94mph with a 1.975 60ft time.

So Saturday night we went back to St00pid's shop and did a leak down test/compression test. Compression right after we built the motor was 200 across the board with a 84mm JDM B16 with JE pistons yielding a 9.8:1-10.1:1 Compression Ratio. When we did the Compression Test this weekend it was 150 in cyl. 1/2/4 and 155 in cyl. 3. We used a different gauge than the first time. We proceeded to do a leak down and it went like this-->
cyl. 1-18%
cyl. 2-25%
cyl. 3-5%
cyl. 4-15%

So, I finish qualifing and first round of eliminations on Sunday and drive the car back to Dallas. Get the car to VSV and Stoney and I do a compression test with the same gauge we used when we had the motor built. Compression read 185 in cyl. 1/2/4 and 190 in cyl. 3. We get the car on the dyno and without changing the tune at all it made 325.52whp/219.81whp with 79.87 degrees outside. When I made 415 I was at full boost by 5700rpms...today on the dyno I only made 4.8lbs by 5000rpms. Most power it would hit was 12lbs by 9000rpms.

When it was on the dyno I watched for blow by and there was none coming out of the head, but some white (mostly black) smoke coming out of the exhaust. There is some oil in the intercooler piping leading to the intake manifold and a small amount of shaft play in the turbo. Or is could be that the headgasket is blown in between the cylinders since there is no oil showing anywhere around the block. Another thing is that I have the AVCR Boost Controller and I have been told that the solenoid's go bad everynow and then, but is that last thing that I am thinking is wrong.

So, basically I am thinking it is one of 4 things...
1. Rings
2. Headgasket
3. Turbo
4. Boost Controller

Any suggestions??????? Here are pics of my two dyno graphs with the same tune, but one was 2 weeks ago and the other was today.....
http://pg.photos.yahoo.com/ph/...iew=t

***UPDATE***

Well today we disconnected the AVCR and put a Turbo XS Boost Controller on there so we wouldn't have to deal with duty cycle, etc. First pass off of the wastegate was 249whp. We turn the boost up 4 turns and make another pass...this time only making 252whp.....so we turn it up again another 4 turns and this time only making 256whp. The most boost that it hit was 9.3lbs. We take a look at the turbo and there is some shaft play in the turbo, but not enough to make it hit the compressor. Then we notice that there is some metal dust that is caked on the compressor and it is a very fine dust. Conclusion is that turbo is done, and I will be taking it off to send in for Warranty.

Now as far as the previous leakdown numbers go. We did another leakdown today and the average across the board was 11-12% leakdown. We call the machine shop that where I had it built and asked them what they thought it could be. The machinest that put it together said the same thing that Arturbo had said....and that was that Oil Rings on the pistons are probably fine and that is why my compression/leakdown is fine, but one of the top rings were probably washed. They had two other motors that were running real rich and the rings ended up becoming washed the same way. Today when we had the car on the dyno and got into boost the AF was around 11.5:1 and at idle it was around 10.3-10.4:1. Conclusion is that from the motor running rich it more than likely washed one of the top rings on all the pistons..........


Modified by Bulldogg83 at 7:22 PM 10/13/2004

 

can u get pics of the plugs? 18 degrees might have been a tad too much for 17 psi with that high compression.... unless this wasnt on pump gas.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mase &raquo;</TD></TR><TR><TD CLASS="quote">can u get pics of the plugs? 18 degrees might have been a tad too much for 17 psi... unless this wasnt on pump gas. </TD></TR></TABLE>

I knew I forgot to add something in. The plugs are just black. No white/no orangish yellow color to it. Just black. Today when we had it on the dyno AF was around 11.3:1 for some reason, and we hadn't touch anything. Fuel pressure was at 45 with 1000cc injectors. Can't remember what duty cycle is at. This was all tuned and ran on 93 Octane.

 

hrmm that sucks, its gonna be hard to tell you what happend , its probably running pig rich @ partial throttle to foul out the plugs like that.

sucks dude, good luck on the rebuild. id pull back some timing though.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mase &raquo;</TD></TR><TR><TD CLASS="quote">hrmm that sucks, its gonna be hard to tell you what happend , its probably running pig rich @ partial throttle to foul out the plugs like that.

sucks dude, good luck on the rebuild. id pull back some timing though.</TD></TR></TABLE>
with it running that rich what would cause the leak down percentages??? I mean the compression is flat across the board with no blow by, but do you think that the rings might have possibily been washed?

 

how many miles are on the motor?

 

Did Jason pinpoint where it is leaking from? Usually I THOUGHT a leakdown cna pinpoint if valves, valve seals or rings were the culprot for leakdown #s like that. Mine were 3% and les when my motor had a good 1000plus mile son it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mase &raquo;</TD></TR><TR><TD CLASS="quote">how many miles are on the motor?</TD></TR></TABLE>

Been built for right at 1 1/2 months or so and has around 5000 miles on it.....daily driver

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Boostfed &raquo;</TD></TR><TR><TD CLASS="quote">Did Jason pinpoint where it is leaking from? Usually I THOUGHT a leakdown cna pinpoint if valves, valve seals or rings were the culprot for leakdown #s like that. Mine were 3% and les when my motor had a good 1000plus mile son it. </TD></TR></TABLE>

didn't PINPOINT it, but did listen out of the oil cap and didn't hear much and then opened up the throttle and didn't hear much coming out of there....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bulldogg83 &raquo;</TD></TR><TR><TD CLASS="quote">

didn't PINPOINT it, but did listen out of the oil cap and didn't hear much and then opened up the throttle and didn't hear much coming out of there....</TD></TR></TABLE>

Rings then I would thunk?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Boostfed &raquo;</TD></TR><TR><TD CLASS="quote">

Rings then I would thunk?</TD></TR></TABLE>

another minor detail that I forgot to mention was that when I pulled the plugs there was a small amount of smoke coming from cylinder 3, but again no blowby when I took it to 9000rpm today on the dyno.....

 

Wow, this kinda scares me, espically when I'm about to complete my build. . .
I hope you find what caused it. . .

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by m R g S r &raquo;</TD></TR><TR><TD CLASS="quote">Wow, this kinda scares me, espically when I'm about to complete my build. . .
I hope you find what caused it. . . </TD></TR></TABLE>

that makes two of us.

 

damn!!

 

I don't like your leak down numbers.

You need to find out why you have so much.!

Try adding a bit of oil into each cyl and see what happens. if numbers pick up then you know it's rings. If not it's leaking from somewhere else. (valves, headgasket)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Enzo-Racing &raquo;</TD></TR><TR><TD CLASS="quote">I don't like your leak down numbers.

You need to find out why you have so much.!

Try adding a bit of oil into each cyl and see what happens. if numbers pick up then you know it's rings. If not it's leaking from somewhere else. (valves, headgasket)</TD></TR></TABLE>

would you mind explaining more on this. How much oil to add and just pour it straight into each individual cyl?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bulldogg83 &raquo;</TD></TR><TR><TD CLASS="quote">

would you mind explaining more on this. How much oil to add and just pour it straight into each individual cyl?</TD></TR></TABLE>

Just a capful Brian. Try it out then repost!

 

I love your car/setup, sorry to hear.

 

Alright so DiRep972 and I just got done with the official "Oil Compression Test" and here is what we got...(all numbers are in order from cyl 1-4) It was done with a BRAND NEW Mac Compression Gauge that my roommate just bought from Mac 2 weeks ago and hasn't used it yet....

Cold no oil--&gt;
165, 180, 170, 170

Hot no oil--&gt;
190, 170 ,190, 180

Hot & oil--&gt;
240, *280, 250, 250
*Got a little happy with the oil so we did it again

Hot & Oil 2--&gt;
235, 240, 240, 235

OK enter comments here--&gt;

 

Rings as Enzo said earlier!

 

Damn man, I saw you run at the track 12.4@117. Hopefully you find the prob.

Charles

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Boostfed &raquo;</TD></TR><TR><TD CLASS="quote">Rings as Enzo said earlier! </TD></TR></TABLE>

i said it before anyone, and i gave them instructions since they are ******* tards...


bad tune y0

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 97hb &raquo;</TD></TR><TR><TD CLASS="quote">
Damn man, I saw you run at the track 12.4@117. Hopefully you find the prob.
Charles</TD></TR></TABLE>

That 12.4 @ 117 was when I made 370whp and had 2.0/2.1 60fts....

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mase &raquo;</TD></TR><TR><TD CLASS="quote">

i said it before anyone, and i gave them instructions since they are ******* tards...
</TD></TR></TABLE>

lol...karma will catch up with you once you slip and drink that mexican water this weekend! Then we'll see who's the tard!

 

sorry to hear about that.....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mase &raquo;</TD></TR><TR><TD CLASS="quote">

i said it before anyone, and i gave them instructions since they are ******* tards...


bad tune y0</TD></TR></TABLE>

Must've been on an IM and not Posted on here TARD! LOL! Yeha he told me on AIM he was gonna do what you said, I was like WTF, I thought Enzo said that and thought Brian was going crazy! LOL!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Boostfed &raquo;</TD></TR><TR><TD CLASS="quote">

Must've been on an IM and not Posted on here TARD! LOL! Yeha he told me on AIM he was gonna do what you said, I was like WTF, I thought Enzo said that and thought Brian was going crazy! LOL! </TD></TR></TABLE>

acutally Enzo implied doing it on the leak down test I thought. maybe we miss understood--&gt;

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Enzo-Racing &raquo;</TD></TR><TR><TD CLASS="quote">I don't like your leak down numbers.

You need to find out why you have so much.!

Try adding a bit of oil into each cyl and see what happens. if numbers pick up then you know it's rings. If not it's leaking from somewhere else. (valves, headgasket)</TD></TR></TABLE>


Modified by Bulldogg83 at 12:41 AM 10/12/2004