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Location:
South Africa
Registered:
August 2005
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Detonation on 4agze turbo
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Thu, 25 August 2005 07:25
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Need some help as to what causes detonation broke my motor twice same problem detonation on pistons could it be timing , fuel,turbo or the piston i am using the normal super charge forge piston .
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Location:
Toronto, Downtown
Registered:
September 2004
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Location:
Adelaide
Registered:
May 2002
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Re: Detonation on 4agze turbo
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Thu, 25 August 2005 08:21
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| avante123 wrote on Thu, 25 August 2005 16:55 |
Need some help as to what causes detonation...could it be timing, fuel, turbo ...
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Congratulations, you have answered three very correct responses to your own question.
Add also, combustion chamber efficiency, hot-spots, A/F-R, inlet temps.
More information is needed. EG is it well tuned on awesome fuel and using 70deg advance at full load/revs?
[Updated on: Thu, 25 August 2005 08:24]
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Location:
South Africa
Registered:
August 2005
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Re: Detonation on 4agze turbo
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Thu, 25 August 2005 08:35
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I have a standard 4agze motor
t3/t4 dash 2 exhaust wheel and housing
i was using standard fuel the mech says it was the turbo boosting too high about 1.2bar that's why it detonated .
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Location:
Toronto, Downtown
Registered:
September 2004
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Re: Detonation on 4agze turbo
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Thu, 25 August 2005 09:07
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is this in an mr2 by any chance???
my guess is it leaned out then
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: Detonation on 4agze turbo
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Thu, 25 August 2005 14:16
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step 1. get aftermarket engine management
step 2. get it properly tuned
step 3. get new GZE pistons + rings from toyota
step 4......
step 5. profit
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Location:
Bundaberg, Qld.
Registered:
May 2002
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Re: Detonation on 4agze turbo
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Thu, 25 August 2005 20:50
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it's wierd it broke out there than lifting/curving/breaking up the top ring land first.
yea an aftermarket engine management set-up is best (and properly tuned like mentioned) if you want to run high amounts of boost, and a good i/c set-up.
though i am having better luck useing my 9.4:1 casties than i did with the gze forgies.... 
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Location:
Syndey
Registered:
December 2002
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Re: Detonation on 4agze turbo
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Fri, 26 August 2005 03:40
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| feral4mr2 wrote on Fri, 26 August 2005 06:50 |
though i am having better luck useing my 9.4:1 casties than i did with the gze forgies....
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must be something with toyota 9.4:1 cast pistons, i have pushed my 4efe to 21psi and still going stong 
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