#5302, "So what does Hahn have to say about detaonation and the 420A"
Just curious. I personally dont believe our cars are detonating all the time or even most of the time at moderate boost levels (or at all at 10lbs and under) . Cast pistons wouldn't last a month under daily detonation. I do believe its possible to have high rpm detonation without any means of detection without telemetry but dont think thats why people are blowing either. I also know are engines are one of the most detonation resistant engines out there by design and practice(just take a look at the semi wedge head and nearly flat top pistons or spend more time at neons.org with 12:1 pump gas NA 420A's). The question is at what point (hp level, boost, on your kit, whatever) does detonation really become a concern that needs adressing (in the form of timing retard) assuming efficient enough intercooling and adequate fuel. Right now I dont think anyones knows for sure.
Stan2gnt Stan2va@aol.com 95 Talon 420A-Turbo Former and future nitrous user
:farfrommugen: Yes I still own a 2gnt. Damn right I've been here longer than U klassic_liven@yahoo.com
#5303, "RE: So what does Hahn have to say about detaonation and the 420A" In response to Reply # 0
my thoughts exactly. I have ran 11 PSI, with just some octane booster dumped in, and no detonation. In fact, i feel that my car runs too rich half of the time. I have never noticed the slightest bit of detonation. I keep boost sane on the street, dump race gas in for the track, and i don't see any problems. I think our motors are built a hell of a lot better than even some older turbo cars were, and they have been known to run 15 PSI. For example, the chrysler 2.2 turbo motors. I would venture to say that alot of these motor failures were related to human error, or boost spikes caused by us doing something. Either that, or faulty parts on the car, like Raizin's cam shaft snapping. I just don't see how everyone is getting detonation.
#5304, "RE: So what does Hahn have to say about detaonation and the 420A" In response to Reply # 1
Stan... that's what I meant. You misunderstood me. I didn't mean you're detonation all the time.. but under hard acceleration. If you're knocking at idle than you definately have a problem.
#5306, "RE: So what does Hahn have to say about detaonation and the 420A" In response to Reply # 2
Yeah raizin I know what you meant (and a little exaggerating to make a point. I do it all the time). But since you said it I just used it to make my thread more exciting.
Stan2gnt Stan2va@aol.com 95 Talon 420A-Turbo Former and future nitrous user
:farfrommugen: Yes I still own a 2gnt. Damn right I've been here longer than U klassic_liven@yahoo.com
#5307, "RE: So what does Hahn have to say about detaonation and the 420A" In response to Reply # 0
Have you noticed how its always just "the bunch of us" discussing this topic? I wonder why everyone else is avoiding it.
My car ran richish (safe) too all the time when I blew up the engine.
When I blew up the engine was after quite some hard driving. I honestly don't think it was the pistons, just the rings that suffered. I still have my original engine in my car. I will remove it (and instpect it) when I switch it with the new motor.
#5308, "Detonation can cause engine failure" In response to Reply # 5
But it is not the only cause. i think the main reason 420A's break under boost is the internal parts inability to produce the power that is being tapped (there is only so much that a factory piston ring or connecting rod can take basically).
#5309, "RE: So what does Hahn have to say about detaonation and the 420A" In response to Reply # 5
I avoid it because I don't know enough to make an educated answer. I am still learning about turbos. I have learned a lot over the last couple years from this board. And in about a month (if the New edge kit ever comes out) I will learn a LOT more when my car is boosted. Speaking of turbos....It is hard to stop myself from buying the star kit. I will have enough for a star stage one next week but I want to hold off for that new edge kit. I know if I buy the star kit and the new one comes out I will be very pissed off. I guess good things come to those who wait? Please hurry Shaun and Wyatt!!!!!!!!!!!! I NEED BOOST!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
DAVE_FL 97GS AEM CAI AFX PULLEY AFX solid motor mount Magnaflow exhaust Sparkco 9mm wires Eibach Pro Kit tokico shocks Altezzas A Badass sound system Indiglows,neons,and all that good stuff...hehe BOOSTING SOON!!!!!
#5310, "RE: So what does Hahn have to say about detaonation and the 420A" In response to Reply # 7
I haven't been avoiding, just not ed-ja-ma-cated enough to put my two cents in... besides this is only the 2nd day my PC has been back up for the last 2 weeks thanks to having to move...
I have been boosting for over 13K miles with zero problems. I need to do a compression test to see the health of my engine, but I haven't had any real problems (besides the accident)... knock on wood...
DoN '99 GS Sports Edition Star Stage 2, CFDF Clutch Greddy Manual Boost Controller Greddy BOV and EVO Exhaust Greddy TT and shift knob AF/X Underdrive Pulley AEM Big Brake Kit B&M Edge Short Shifter Eibach Sportlines with Tokiko Blues
'99 Eclipse GS Sports Edition Star Stage 2 Greddy EVO Exhuast AEM Big Brakes Greddy Type S BOV Pioneer DEH-P7200 Bazooka EL1500 running 2 MTX 10" Subs Fosgate Separates throughout
#5311, "RE: So what does Hahn have to say about detaonation and the 420A" In response to Reply # 8
LAST EDITED ON 20-May-01 AT 06:50 PM (PST)
Wow, 13K miles... Cool! What Boost pressure you running? Stock Internals I assume? Fuel System?
As for people trying na git edjamacated, well, we all are!
For me though, most of my "education" seems to be coming from my trial and error (boom) incident.... As *enlightening* as it may have been, I really prefer to lear this way, by asking, and throwing ideas around!
#5312, "RE: So what does Hahn have to say about detaonation and the 420A" In response to Reply # 9
Another reason I think we have a disadvantage is oil cooling. The 4g63 motors have oil squirters that cool the lower part of the piston. I would also like to look into having a separate oil system for the turbo. I don't really know how much of a difference that would make, cooling wise or metal breakdown but its something I'm interested in. Wyatt Leras http://www.turbogs.com 98 Eclipse GS Star Stage 5,000 Turbo kit
