Tuners out there please tell me how my timing looks. Have a possible blown headgasket and trying to narrow things down. here is my low timing...



And here is my high...



Modified by mitsuman at 9:56 PM 1/30/2008

 

Looks like normal n/a maps to me....for the mostpart anyway.

 

its a boosted tune

 

show us the boost part of the maps then

 

oops. ok edited.

 

Your maps are pointless unless you sync your distributor to your engine management system properly

 

Timing looks ok for 12 psi...so ur headgasket is blown huh? what kind of head studs you using? and what type of fuel? did you experience any ignition break ups? and how were ur afrs? Did you pull ur plugs to see what they looked like?

and yeh did u sync ur timing! hehe

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by iBrandon &raquo;</TD></TR><TR><TD CLASS="quote">Timing looks ok for 12 psi...so ur headgasket is blown huh? what kind of head studs you using? and what type of fuel? did you experience any ignition break ups? and how were ur afrs? Did you pull ur plugs to see what they looked like?

and yeh did u sync ur timing! hehe</TD></TR></TABLE>

timing was synced by tuner.

arp headstuds, 91 octane, no ignition break ups but possible lean condition in 1st cylinder due to bad injector wiring. also #1 cylinder is a little low on compression. about 10psi lower than the others. afrs are good at 11.5 - 11.7
leakdown test should show me, just wanted to get this out of the way. just got it running too.

 

what motor and compression ratio?

 

b18c, 9.8:1

 

what do the sparkplugs look like? are you able to post some good close up pix of them?

 

i can tomorrow.

 

yep get those! it can tell us alot!

 

what symptoms are you having that lead you to believe its a blown headgasket?

 

please read this thread. it should answer your question and then some...

https://honda-tech.com/zerothread?id=2211984

 

Timing looks a bit aggressive for basically 10:1. I'd put it back on the dyno and try pulling 2 degrees and It will probably make the same power.

 

yeah blind fashion has the same idea as me, instead of 20 degrees try 18, dyno is best to see how the torque curve is effected, tuning for MBT is best then back off a small amount to prevent such things. where your having problems in high boost back off just a few degrees, reevaluate the problem, if worse comes to worse, more dyno time might be necessary to explore the detonation threshold, every motor is a little bit different in the small details of its wants and needs.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Blind-Fashion &raquo;</TD></TR><TR><TD CLASS="quote">Timing looks a bit aggressive for basically 10:1. I'd put it back on the dyno and try pulling 2 degrees and It will probably make the same power. </TD></TR></TABLE>

seems like timing is alright.... on the average car i usually have like 1.5-2.5* less timing in the tunes i do.... but every setup is different

 

You got tuned at Church's? he probably tuned it to MBT so u might be having some other issues

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by quicksilver1689 &raquo;</TD></TR><TR><TD CLASS="quote">every motor is a little bit different in the small details of its wants and needs.</TD></TR></TABLE>

+1


If Shawn Church tuned your car I doubt the problem is in the tune.

**** happens in this hobby, I always feel bad when I see it happen to someone. Hope it is a headgasket! Those are cheap and easy to fix in the big picture of things.

 

ya i hope its just a head gasket too.

shaun actually didnt do the tune, and im not knocking on them just to makes things clear. but i know the tuner didnt have much time to really spend time on it so was just checking. thanks

 

Wait...

12psi on a stock map sensor?! I'm hoping you just forgot to show us the 3bar maps.




Modified by SovXietday at 8:43 PM 1/31/2008

 

i just posted the boost tables. i can get the 3bar tables. sorry didnt think it made a difference.

im using 3bar gm.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mitsuman &raquo;</TD></TR><TR><TD CLASS="quote">i just posted the boost tables. i can get the 3bar tables. sorry didnt think it made a difference.

im using 3bar gm. </TD></TR></TABLE>

yeah.

did the motor ever see anything higher than 12psi? really? i mean a 3 bar and youre runnin 12psi?

any possible overboosting?

i would get the rest of the MAP up and then we can see

 

too much timing dude........ get about 2-3 degrees off in the higher mid-topendish.


hehe

good luck on your next tune