Boostedb20EH2

So i was out at the track last night and my car was running good first couple of pulls. I blew charge pipes a few times (my clamps suck, im getting new ones) But anyways, After about 3 passes my car started to detonate after like 5-6k during 3rd and 4 gear pulls. So i stopped (obviously that isnt good). I drove it home, its fine under boost. Today i get up and try to figure out whats going on and i get out my timing gun and for some reason my timing was way off like at 0btc so i adjust back to 16 which is like way back on the dizzy for some reason. And take the car out to see whats going on. I go to do a 3rd gear pull and i notice my boost gauge isnt reading, and i hear a big pop. I look back and see my charge pipe in the middle of the road. So i have that now its all dented. But after inspecting my car i notice the vaccum line off the bov to the boost gauge is completely in half, and a decent hole in the vacuum line to the fpr. This may have happened last night, could the vacuum leaks be a cause for detonation (maybe the one to the fpr?) Im confused, my car was just tuned a few weeks ago and running fine.

0mtber

iTrader: (2)

Do you even really know what detonation is ?

Do you know what it really sounds like ?

Just making sure...

A lot of people that are inexperienced somehow confuse ignition breakups for detonation.

Get your self new couplers, t bolt clamps & a tuner.

Boostedb20EH2

Im not ruling out an ignition break out,
What i experienced, happened to me and my tuner while tuning.
He called it detonation.. But right after my dizzy went.
I just replaced the dizzy 2 days ago..

Boostedb20EH2

If my computer quits being a pos i can possibly get a video of it last night at the track, you can hear it, if that may help?

Boostedb20EH2

http://smg.photobucket.com/alb...e.flv
There is a video. Its noticeable in 4th gear the most.

THEDirtyDseriesWOOT

ewww.. sounds like ignition to me but thats just my opinion

Boostedb20EH2

Yeah sounds like ****..
Just need to find out what exactly it is.. my guess is ignition also.
Also i have my ngk bkr7s gapped to stock(.33 or .35 i think it is)..would gapping them down help?

adseguy

People use headphones and a microphone on the engine to hear detonation. Posting up a video of your drag race asking "is this detonation?" leads right back to.....
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mtber &raquo;</TD></TR><TR><TD CLASS="quote">Do you even really know what detonation is ?

Do you know what it really sounds like ?

Just making sure...

A lot of people that are inexperienced somehow confuse ignition breakups for detonation.

Get your self new couplers, t bolt clamps & a tuner.</TD></TR></TABLE>

It sounds like ignition, but I'm not there and can't test anything out. Go talk to your tuner

Boostedb20EH2

My bad, like i said what i heard was the same thing my tuner told me was detonation..

Trailz-EX

you should try bringing your gaps way down like 27 28 thousandths that happend to my first turbo motor..... now its two motors.... well more like 2/3 and one cylinder and the front of the motor are now seperate from the block. connecting rod ate the rest for lunch

Boostedb20EH2

You think gapping them will help with the break up?

0mtber

iTrader: (2)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Boostedb20EH2 &raquo;</TD></TR><TR><TD CLASS="quote">My bad, like i said what i heard was the same thing my tuner told me was detonation..</TD></TR></TABLE>

If your tuner was calling a missfire "detonation", you need to find another tuner...

Boostedb20EH2

Haha, well he knows what he is doing..im sure of that.

Chiovnidca

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Boostedb20EH2 &raquo;</TD></TR><TR><TD CLASS="quote">for some reason my timing was way off like at 0btc so i adjust back to 16 which is like way back on the dizzy for some reason. </TD></TR></TABLE>
Did the timing belt slip a tooth?

sp00led

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Boostedb20EH2 &raquo;</TD></TR><TR><TD CLASS="quote">Yeah sounds like ****..
Just need to find out what exactly it is.. my guess is ignition also.
Also i have my ngk bkr7s gapped to stock(.33 or .35 i think it is)..would gapping them down help?</TD></TR></TABLE>

try .22-.23

Trailz-EX

definately think making the gap smaller would help... yours is to big its blowing the spark out... sounds crazy but... i thought connecting rods liked being in the darkness of an oilly crank case too

if anything it should help out

Boostedb20EH2

I adjusted the timing and gapped the plugs down, dont know which one worked but it doesnt misfire anymore.

THEDirtyDseriesWOOT

lol it was plugs man i had to gap mine to .18 before it would stop missfiring.. glad it worked out

SOHC_MShue

I cant count how many times someone has been talking about "detonation" to me when in reality it was just ignition breakup. Gap your plugs down and i'm sure if it doesn't solve the issue then i'm sure it will at least make the issue better. If it doesn't solve it completely or if you have to go insanely low on the gap then something is fucked with your ignition or you are possibly having fuel issues with the tune.

You will rarely hear detonation without some kind of listening device. If you can hear it over a loud *** exhaust then you have got serious tuning issues that need to be worked out.