tuning tips for controlling detonation?? - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 5 Old 03-01-2003, 02:34 PM Thread Starter
 
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Question tuning tips for controlling detonation??

intercooled twin turbo 5.0L, 8.5 psi of boost.
where should i start? lower the boost, increase fuel pressure, reduce timing, add octane ...

what would be an easy procedure?

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post #2 of 5 Old 03-01-2003, 03:03 PM
 
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Alcohol kit... ;-)

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post #3 of 5 Old 03-01-2003, 04:23 PM Thread Starter
 
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Quote:
Alcohol kit...
are there any turbo 302`s w/out alcohol kits?
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post #4 of 5 Old 03-01-2003, 04:36 PM
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Quote:
are there any turbo 302`s w/out alcohol kits?
Pretty much all of us.

I've found that my car starts to detonate when I get greedy. Basically set your timing low and your fuel pressure high, then go from there. Adjust it to a point that the car doesn't ping under normal full boost situations, or any situation for that matter.

Just don't get greedy with timing and boost. Each car is different so it's hard to say what exactly would work on your car.

For an example, here is how my car is setup. And I never detonate-that I know of.

fuel pressure @ 44 lbs with line on.
base timing @ 9* with BTM set at 0.
Boost set @ 12 lbs
91 octane pump gas here in Utah.
msd 6btm ignition
36 lb injectors
T-rex inline pump
255 intank pump
No FMU.
Intercooled.

I do also have a custom chip right now that helps the situation, but even without the chip my car doesn't detonate. It does run leaner (more lean?) though.

05 GT
85 ASC McLaren Capri
79 Pace Car

Last edited by 19COBRA93; 03-01-2003 at 04:46 PM.
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post #5 of 5 Old 03-01-2003, 08:28 PM Thread Starter
 
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Question will the a/f meter work w/out cats?

should the reading be precise?
or does it need the heat of the cats ?

there are 3 areas on the meter: lean, stoich, rich.
when should it be lean, stoich or rich?
(just wanna make sure i can read the thing)
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