Hey guys, by the end of the week, I will have my new true dual installed. Now I know thats not going to give me incredible horsepower, but i am convinced I could see 10 or so. Anyway, while waiting for headers aswell, I am next thinking about buying a performace modular, and getting a throttle body spacer or throttle body, and then an underdrive pulley. As it stands right now, the truck is incredibly fast for its size, and most people cant beet me. Is it worth getting the throttle body, or the spacer. I know alot of people say the throttle body spacer is just a $70 paper weight, but I hear it makes alot of whisttling noises, which my K&N does right now ,so more whisttling is fine with me, even if its not doing alot. I then though the chip would help give me a fuel curve, I already had been using high octane fuel so I figured get the chip to actually utilize my good habits, and then what do you guys think of the underdrive pulley? Sorry for rambling, thanks guys


By the way guys, the system I bought of Summit yesterday, a Flowmaster Universal Dual exhaust Kit, 2 1/2 inch. I had originally bought a 3 inch one, but while on the phone with a Flowmaaser represenative, he urged me like crazy to call back and cancel my order and get the 2 1/4 dual exhaust, saying that 2 1/2 inch and 3 inch was way to big, and that 2 1/4 was the biggest i should go with, so I split the differnce and went with the 2 1/2 because in my mind guys, 2 1/4 is practically like what i have now ,a straight through 3 inch cat back. He was saying 3 inch would have no vaacuming effect, and that I wouldnt be able to get the truck out of its own way, then I got my mechanic telling me to go 3 inch, because it sounds great. Do u think 2 1/2 was good?

 

An underdrive will help with engine exceleration but you may lose your ability to charge your battery at idle. If you want a whistle sound you can always buy those exhuast tips that make the turbo sound to fool people into thinking you have turbos.

 

O really? Whats the acceleration difference on the underdive pulley, is it worth it, will I kill my alternator or something? Will a throttle body do anything for me, or will it just bog my motor because to much air going in, not enough getting out?

 

But what about the throtle body spacer? I was looking at getting one also and have herd mixed oppions. O yah my truck has a 460 if that makes any diffrence on wether its a $70 paper weight or acually useful

 

yea i got the 460 too.

 

Using a underdrive pulley just reduces the parasitic drag a tad. You won't magically gain 10 hp. It just allows the engine to rev a little faster. You wont kill or hurt anything in the charging system. However you may end up needing a jump once in while if you have a huge amp in your sound system and listen to it without driving. Make sense? Throttle body spacers might give you 2-3 HP but nothing you will actually feel IMHO.

 

Yeah I have stock stereo, so charging would be no problem then. I will do that, and prob the spacer to, thanks guy

 

Throttle body yes, spacer no.

UD pulley, go for it.

cut the restrictor horns if you have not already done so.

buying premium gas is useless unless you are tuned for it or have made other changes to the motor

 

Maybe so, but I take no chances. Thank you

 

so is there anything that is just a bolt on that is nothing special that you can just slap on a efi460 and get good results?

 

nope, probably the best bolt on is headers, but theyre expensive (500-1000 dollars). theres an aftermarket supercharger you can get but thats really expensive (3000+ dollars) and thats about it for worthwhile bolt ons... the best any other bolt-on will do is maybe 10 horse... headers would give around 20-25, those vortec superchargers will give around 100 horse, but thats about the limit on the efi system. if you were to switch to a carb system then there isnt really a limit on mods, and mods are cheaper and simpler to do on a carb engine... you could put out anywhere from 250 to about 750 horse depending on modifications

 

ok soooooooooo... My motor may crap out at any time so is a 460carb going to use the same motor mounts and bolt up to my tranny just like my efi??? If yes its almost stupid for me not to go carb.

 

yep, your exhaust is going to have to be changed, but otherwise it will bolt in. you may have to get a computer to control your tranny depending on what tranny you have, but itll work fine if you do.

 

cool and when I get a new motor I am getting a new true dual exhaust any ways so the exhaust is covered. But wouldn't I want to get a new tranny anyways because it will have upwards of probly 150k miles on it?

 

if you do decide to replace the transmission (which you would probably want to do anyways being 150k and being put against a built 460) id get a c-6. its simple, no computer controls, and good for 800 horse