<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by boosted hybrid &raquo;</TD></TR><TR><TD CLASS="quote">Plot speed vs. rpm graphically. </TD></TR></TABLE>


<FONT SIZE="3"><FONT COLOR="red">Now this is wierd. The car did not do it on the street. Tach did not pause, etc. Nothing was changed from the dyno to now. </FONT></FONT>

 

clutch slipping? or maybe something with the igintion?

 

Go to another dyno and see what happens. Pay for a pull or two. If it's not doing it on the street and everything else is fine, it's possible the dyno is acting up.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Blown90hatcH &raquo;</TD></TR><TR><TD CLASS="quote">
<FONT SIZE="3"><FONT COLOR="red">Now this is wierd. The car did not do it on the street. Tach did not pause, etc. Nothing was changed from the dyno to now. </FONT></FONT> </TD></TR></TABLE>

I was wondering about that since you're in Florida w/the temperatures/hudity

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by racinskittle &raquo;</TD></TR><TR><TD CLASS="quote">Did you add or take away fuel from the street tune?</TD></TR></TABLE>

Did you dyno it in an air conditioned building? (A/C will of course remove a lot of the humidity from the air).

Might be a stretch



Modified by racinskittle at 6:21 PM 4/20/2005

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by booscivic &raquo;</TD></TR><TR><TD CLASS="quote">clutch slipping? or maybe something with the igintion?</TD></TR></TABLE>

kinda what I was thinking... maybe the clutch? or as mentioned above the dyno acting up is possible too?

 

weirdness

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by boosted hybrid &raquo;</TD></TR><TR><TD CLASS="quote">Go to another dyno and see what happens. Pay for a pull or two. If it's not doing it on the street and everything else is fine, it's possible the dyno is acting up. </TD></TR></TABLE>We are going to try that for sure.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by racinskittle &raquo;</TD></TR><TR><TD CLASS="quote">
I was wondering about that since you're in Florida w/the temperatures/hudity
Did you dyno it in an air conditioned building? (A/C will of course remove a lot of the humidity from the air)</TD></TR></TABLE> It was not dynoed in an air conditioned building. Outside temps are almost the exact same as they were on the dyno. I know it is not the same, but we had a large high flowing fan in front of the car that I take with me to all dyno appts. We made no changes to the AF from the street tune to the dyno on this mustang dyno.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by twkdCD595 &raquo;</TD></TR><TR><TD CLASS="quote">kinda what I was thinking... maybe the clutch? or as mentioned above the dyno acting up is possible too?</TD></TR></TABLE>

He said he made sure the clutch wasn't slipping either. Crazy ****.

 

Was the car doing this during loaded AND unloaded pulls? Throwing ideas out there.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 0x64 &raquo;</TD></TR><TR><TD CLASS="quote">Was the car doing this during loaded AND unloaded pulls? Throwing ideas out there.</TD></TR></TABLE>Alpha, That is one thing that I am questioning. These pulls were only done on loaded conditions. What if the loading was too much when setup in the mustang dyno?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Blown90hatcH &raquo;</TD></TR><TR><TD CLASS="quote">Alpha, That is one thing that I am questioning. These pulls were only done on loaded conditions. What if the loading was too much when setup in the mustang dyno?</TD></TR></TABLE>

That's the only feasible idea I have right now. The only other thing I can think of is the ignitor chip but if it wasn't doing it on the street we can rule that, or anything on the ignition side, out. If you can talk to Sam and see what he thinks about this. Maybe there was too much drag at this point? I dont know ... Talk to Sam and get that beast on another dyno.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Blown90hatcH &raquo;</TD></TR><TR><TD CLASS="quote">Alpha, That is one thing that I am questioning. These pulls were only done on loaded conditions. What if the loading was too much when setup in the mustang dyno?</TD></TR></TABLE>

Jason I said it earlier too, but I'm really starting to think it had something to do with the dyno.

However, that still leaves the weird timing maps unexplained.
EDIT: Or does it?


Modified by RyanCivic2000 at 2:01 AM 4/21/2005

 

mustang dynos have adjustable load settings and have the ability to hold the rollers at a target speed. It's possible the dyno was overloading the engine and this is what was causing the hesitation.

Also, you have 8 degrees being shoved back in it from 6500 to 7k i've never had to do anything like that with a honda. i'd keep the timing low then retest on a different dyno, then put a few degrees back in it and see what it does. It may not make much more power d series dont need much timing.

 

The strange thing is that it sounds like he blew another headgasket on the way home even after them taking all that timing out. I think maybe even more needs to be taken out...at least up top.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Darin D. &raquo;</TD></TR><TR><TD CLASS="quote">mustang dynos have adjustable load settings and have the ability to hold the rollers at a target speed. It's possible the dyno was overloading the engine and this is what was causing the hesitation.

Also, you have 8 degrees being shoved back in it from 6500 to 7k i've never had to do anything like that with a honda. i'd keep the timing low then retest on a different dyno, then put a few degrees back in it and see what it does. It may not make much more power d series dont need much timing.</TD></TR></TABLE>Yeah I understand that about the dyno, but was curious about the overloading and not so much the breaking.

I too have never tuned anything with a crazy timing map like that. But I tried many many different timing settings and the only way to eliminate that funky drop from 5000 up to 7000 was to have the timing low. If I lowered the timing any from 7000 up to 8000 on the top, power dropped like a mad man. I am going to try and get back on another dyno if we can find time.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SOHC_MShue &raquo;</TD></TR><TR><TD CLASS="quote">The strange thing is that it sounds like he blew another headgasket on the way home even after them taking all that timing out. I think maybe even more needs to be taken out...at least up top. </TD></TR></TABLE>
Ryan's brain was fooling him. We made multiple boost passes yesterday with no problems. I think he spilled some out that day playing with the overflow tank.

 

yea i think blowing your headgasket just makes you paranoid as ****

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Blown90hatcH &raquo;</TD></TR><TR><TD CLASS="quote">Ryan's brain was fooling him. We made multiple boost passes yesterday with no problems. I think he spilled some out that day playing with the overflow tank.
</TD></TR></TABLE>

Let's hope that's what it was.

I pulled the overflow out to mess with the vacuum box that I have mounted right by it. We had a vacuum leak at that time and I may have spilt some coolant and thought it blew out.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SOHC_MShue &raquo;</TD></TR><TR><TD CLASS="quote">yea i think blowing your headgasket just makes you paranoid as **** </TD></TR></TABLE>

ROFL that's the truth. I was popping my hood after every pull.

 

lol i've gotten to the point where i cringe everytime i have to pop my hood or one of my friend's asks to check out my setup because i know my eyes will be glued on that overflow bottle

 

I feel your pain, I cant stop checking good so far!!!

 

anyone thats had a blown HG feel the same as you guys do

even now when i pop the hood the overflow is the first thing i check, oil is second
LOL !!

some one should invent an unblowable HG
LOL !!

 

we should just weld our heads to our blocks

 

just curious... are you running 12 degree's base ignition advance or 16?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PrecisionH23a &raquo;</TD></TR><TR><TD CLASS="quote">just curious... are you running 12 degree's base ignition advance or 16?</TD></TR></TABLE>

We were running 12 deg, then we pulled a few degrees retard on the cam gear to try and shift the powerband some and couldn't get base timing above like 6 deg.

EDIT: With the cam gear zeroed out, 12 deg was the maximum advance we could go on the distributor. I think it has something to do with the ZEX cam.

 

it doesn't have anything to do with the zex cam. Truse me i've tested both the stock and zex cam and had to advance it all the way with both of them. It is just something that happens when you convert to obd1 on a y8. If you want to retard the cam timing more then just make sure you advance your ignition maps enough so that your base timing gets back to 12*.