1999 firebird w/v6 that still runs like a dream but i am loking for some performance tips to give it a little more pep.
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99 bird v6 any tech tips to offer?
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Start with the traditional hot rodding methods of freeing up the exhaust and intake. A K&N air filter and cold air intake combined with a lower restriction cat back exhaust will give you a little more pep and tone. next step would be a lower temperature thermostat and custom computer program to take advantage of all the other modifications. Bypassing the water lines running to the throttle body adds some torque as well.
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Have done a few of those things
I have removed the silencer box on the intake and piped direct to the intake.
I will be adding 160 degree thermostat tonite. Can you explain how to bypass the water lines to the intake and why it helps? Is the cat a bolt on on the firebird and would it cause problems if i gutted it?
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I'd be curious to know as well how to bypass the throttle body coolant lines. The thermostat is mounted right behind the throttle body in the intake and the coolant passage seems to flow straight down from there into the water pump.
I got a nice boost in mid-range torque just converting from the stock intake to to a smooth tube with a less restrictive filter. With the Y87 exhaust, it breathes quite well. The Y87 package also gave my car a shorter rear axle ratio, 3.42 vs. 3.23, so pep is pretty good.
I'd like to figure out a way to ram air it a little to a cold-air intake box but haven't had time.1997 Pontiac Grand Am, 216k+ miles and still moving fast
2004 Pontiac Grand Am SCT, but 35k on the clock
1983 Male Driver, driving Front Wheel Drive only, for now
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Originally posted by 3800_FirebirdI'd be curious to know as well how to bypass the throttle body coolant lines. The thermostat is mounted right behind the throttle body in the intake and the coolant passage seems to flow straight down from there into the water pump..
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Originally posted by 99ws6wannabewhat about the cat question?
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Originally posted by Joe 1320Unless I'm mistaken, there should be two coolant lines plumbed into the throttle body. Can you snap a pic of yours?1997 Pontiac Grand Am, 216k+ miles and still moving fast
2004 Pontiac Grand Am SCT, but 35k on the clock
1983 Male Driver, driving Front Wheel Drive only, for now
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Originally posted by 99ws6wannabeHow do i tell if i have the y87 package? Where do i look and exactly what should it say?
On my '96, the Y87 included disc brakes all the way around (no drums on rear), same faster steering ratio as the V8 cars, limited slip rear differential with a shorter, 3.42 gear ratio, and a larger exhaust system with twin pipes out the rear. Essentially, it makes a Firebird/Camaro a V6 car with most everything the Formula or Camaro Z28 would have, except of course the V8.
On your '99, the only thing different is that 4-wheel disc brakes were standard on all models anyway (since '98), so the Y87 doesn't really include that.1997 Pontiac Grand Am, 216k+ miles and still moving fast
2004 Pontiac Grand Am SCT, but 35k on the clock
1983 Male Driver, driving Front Wheel Drive only, for now
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