Intake/Throttle Body Question

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Jan 14, 2009 | 01:02 AM

Z28MaroJoe

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Intake/Throttle Body Question

So I have a list of bolt-ons I am immediately doing to my 02 Z28(ls6 intake) with a dyno tune. This is what I was definitely going with to start:

-Pacesetter LT Headers
-TSP Catted y-pipe
-SLP Loudmouth 2 cat-back
-SLP Lid
-K&N Filter

I will have a bit of money left over to do one of either 90/92mm Nick Williams tb, 92mm fast intake manifold, or ASP 25% crank udp.

Questions:
-Would a throttle body be worth it on a bolt-on car with the stock LS6 intake?
-Would a 92mm intake be worth it on a bolt-on car with a stock throttle body?
PROBABLY NOT THE RIGHT SECTION BUT:
-Am I missing a cheaper bolt-on for under $500 that would be worth it over a throttle body, intake, or udp?

PS-Please don't attack my exhaust choice, I have a friend with a mustang who has headers, o/r h-pipe, and loudmouths and I have driven in the car and don't have any problem with the drone and love the exhaust note.

Jan 14, 2009 | 01:12 AM

demarco313

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thats pretty cool.. udp would be good.. also if its a automatic u should get a torque converter.. thats usually everybodies 1st mod with a automatic if thats what u have

Jan 14, 2009 | 01:27 AM

c5z28

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stall or a cam would be good. 4.10 gears for a m6 and 3.73 for an auto.

Jan 14, 2009 | 01:45 AM

Z28MaroJoe

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Let me talk a little from here. Yeah it's an A4. I know I can get a 3000-3600 stall converter for $525, but wouldn't install be impossible for a rookie mechanic(only capable of swapping cat-backs and installing cold air intake(on old stang))?

How much would 3.73 gears kill highway mpg if I have 3.23's stock and what should I gain in the 1/4 with them?

How many hrs would it take for a mechanic to install a cam? I don't know if I would be able to afford it and the install for it. What should the gains be on a full-exhaust/lid/ls6 intake ls1?

I will try and search on these, but a quick response by members would be appreciated.

Jan 14, 2009 | 06:43 AM

teke184

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the stock inlet on the ls6 intake manifold is about 75mm....so there is no point putting a 92mm TB on it.
and a FAST 92/92 setup on a stock h/c engine is not going to benefit you much. money better spent elsewhere.

the cost of an aftermarket TB is significantly more than what a ported stock TB is. and the gains are basically the same.

mods for under $500

suspension
roller rockers...if you go higher lift (more power) you'll need new springs too
underdrive pulley
160 stat

for about $600 you can have an electric water pump for a few more hp, and better cooling.

Jan 19, 2009 | 12:33 AM

c5z28

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Quote:

Originally Posted by Z28MaroJoe

3.73's won't absolutley kill gas mileage and you can expect a .1-.2 et gain at the track. A stall is possible but it definatley helps to have friends stuff like that is frustrating but gains are significant. My a4 car stock put 288rwhp, after lid tb ls6 manifold, headers w/ duals I put down 338rwhp 355tq. For the money though the intake set me back 300 and did not yield much hp. If your willing to spend the time you can put a small cam in for close to the same price as a manifold and yield a minimum of 20rwhp as opposed to 6-8 from the manifold, if you want a mechanic to install it they usually say 6 hours and get paid about 80hr just to be conservative lets say 4 hours so $320 to install, not including parts.

Jan 19, 2009 | 12:44 AM

cals400ex

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i would not do the fast intake or the throttle body unless you had heads on the car. i would say the stall would be the best bang for the buck IF you plan on getting some good tires. if you want to get a pair of rear tires with stock rims or whatever for the track, then that is fine. i wouldn't get a stall if you were only going to run street tires, personally. in all honesty, i would get the stall before the headers and y-pipe if it came down to a money issue. i wouldn't get gears since you have 3.23's. the K&N filter will not do anything either. the do not trap the fine dust as well either in my opinion. if you are looking to go fast at the track, i would say the stall would be #1 on my list if and only if you had tires that could hook. an underdrive pulley is usually worth a tenth and a stock ported throttle body is cheap and you can get a tenth out of that too, probably.