Help LT1 DETONATING!!!
#1
Help LT1 DETONATING!!!
A good friend of mine has a 1995 Z28 a4 bone stock on a NOS wet efi kit, tr6 and as soon as you gas it on spray it detonates bad all motor its fine but even on a 50 shot it detonates. What could the problem be? I cant figure it out . Unless some LT1's came from the factory with A LOT of timing.
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#8
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I would recommend checking the jetting, checking the timing, inspecting the opti, and checking the fuel side of the nitrous system to make sure fuel is getting through the nozzle. Also, lower the gap on the plugs to .035".
What do the plugs look like? Also, if you can, see what the knock sensors are doing when you use the nitrous. Sometimes people think they are hearing detonation when it's really something else in the engine.
What do the plugs look like? Also, if you can, see what the knock sensors are doing when you use the nitrous. Sometimes people think they are hearing detonation when it's really something else in the engine.
#12
Definitely check the fuel pressure. If the car still has the stock fuel pump (especially with a lot of miles on it) it is probably time to upgrade to a 255lph pump and put in a new fuel filter.
Dave
Dave
#13
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If 50hp is causing it to detonate then you have to not be getting the proper fuel if any. The stock fuel system should support up to 100-125 with no problem. Take the fuel line off the nozzle and put it in a bucket. With the nitrous bottle off activate the system and see if fuel is there. If you truly detonate it bad enough to hear it while it's under load you'll hurt something on the stock motor. As Jeremy said you might want to log it and make sure it is knock.