i would say you found your problem.
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01-18-2011
i would say you found your problem.
01-18-2011
Hmmm you really think its that big of a deal then?
01-18-2011
Ive ran cam2 112 and 116 blue and never had flames. Also ran plenty of Octane boosters, never had flames either. Id say your cars pig rich. Whats the wideband say?
http://www.streetfire.net/video/2001...ynp_208097.htm
01-18-2011
Wideband is reading 11.5 so I don't think thatd be rich enough... I might see tonight though what its saying while I'm pulling out of wot to see if is shooting rich or something...
01-18-2011
Could be hot fumes that just ignite when they get enough oxygen too. A backfire out the exhaust wouldn't worry me as much as out the intake.
01-18-2011
Just took it for a spin and have narrowed down when this is happening...
1. It only happens when I let out above 6K rpm...
2. Doesn do it letting out of first at all....
3. When I let off the wideband jumps to around 10 (couldn tell cuz it was so fast)
So I dunno maybe brians right but I'm still pretty convinced the toluene plays a part in it a little too...
Oh well ill just kinda see what happens...
01-18-2011
When you let off the throttle, it starts to go into deceleration enleanment, it pretty much cuts spark, then fuel. You may be getting raw fuel into the exhaust, and the heat from the headers after running it up that hard might ignite the fuel when the clean air comes through.
Just a theory, but it sounds cool, don't it?
01-18-2011
Hey sounds just as good as anything I've come up with so far... It would make since though...
01-18-2011
Keep researching though. Never know what you'll dig up.
01-18-2011
Work at a liquer store 8 hrs a day with nothing to do and free internet... Ill find something... Lol
01-18-2011
That is your answer right there...mine had massive backfire with resonator and muffler delete, I had to put a glasspackOriginally Posted by Bio248
01-19-2011
Since nobody else has pointed this out, I'll assume it's something normal and I'm missing something. Could you explain to me why you're exceeding 6,000 rpm?
01-19-2011
Floating valves...with stock springs...last I checked Jarred shifting much of anything over 5800 on stock springs is asking for a unhappy valvetrain.
01-19-2011
umm may i ask what toluene is? ive never heard the term, unless im misreading it
01-19-2011
its an octane booster/race gas additive.
01-19-2011
Also a chemical compund that is found in a lot of other things... Very stable do to the 6 member ring it forms. Therefore increasing its flash point as the higher temp is needed to break the double bonds in the stable ring.
01-20-2011
It is IMPOSSIBLE to cut spark on a 3800.
You can get very low timing, but it will not ever cause flames in the exhaust, although it may help transfer some flames into the exhaust.
The real trick here is the fact that the transmission does not instantly "disengauge" at high speeds/rpms, so the trans will push the motor quite a bit, and it usually makes for a dead spot in the intake where fuel swirls strangely. I can usually get a really nice pop backfire when I put it in 2, and let out at almost any RPM, in my completely stock DD with a short exhaust.
I have yet to shoot a visible flame on my turbo car to my knowledge, and I am running many many devices that would help that happen (race gas, extreme timing mods, antilag, etc).
My buddies UGR TT lambo would toss a pretty decent flame out the back on shifts, and he was running meth injection and a fairly short exhaust.
01-20-2011
Almost Tri-Nitro-Toluene, but not quite as much fire hehe
Had a buddy with a 02 TA that had really free flowing exhaust with a couple bolt-ons and he loved to rev it up to bounce off the limiter because itd shoot flames out, nothing major like the 2F2F cars but a couple puffs of pretty bluish-yellow fire
If your motor is really handling shifting over 6k with no problems, and your exhaust is that free flowing, and the race gas additive is working right, when you just let off the throttle at peak rpms you would be putting enough fuel thru the exhaust to do what Reptile suggested. Id say if your scanner isnt showing anything abnormal, your fine... enjoy it... wow people with it... back up to a cop and scare him with itj/k don't do that
Originally Posted by AmericanSoldier
01-20-2011
sounds like a little extra fuel burning off to me.
01-20-2011
My question is, how are you driving it AND checking for fire out the back at the same time?
That alone makes it sound awesome.
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