Thread: at what mod level do i upgrade TB?

i was leaning towards zzps stage 1..ive searched on mulitple forums but couldnt find when our cars TB gets limited flow..at the moment my mods are as follows

plog, 3" dp, magnaflow cat back, 3.5 s/c pulley, overkill pcm, 1.95 rr, 90 # springs, CAI, 104's and 180 t stat

thanks!

there is no reason to ever buy a modded stock throttle body when it takes a half hour to hog one out yourself. if youre going to buy one buy the ZZP 78mm TB, a northstar setup, or an ls1 setup. i never liked the feel of any of them, but the stocker so thats why i just ported mine by myself.

you dont really need a bigger throttle body until you get to the 3.0 pulley area, which is usually achieved with an intercooler and rockers/cam. even then its not going to net you that much power if any at all.

you do not get throttle response from a northstar. i wish people would stop saying that.

the northstar setup has a linear plate movement while the stock setup is progressive (opens less with less throttle, more with more throttle). i hate the feel of the linear plate movement as youre into boost by touching the pedal with your big toe. HATED it.

Originally Posted by Bio248

there is no reason to ever buy a modded stock throttle body when it takes a half hour to hog one out yourself. if youre going to buy one buy the ZZP 78mm TB, a northstar setup, or an ls1 setup. i never liked the feel of any of them, but the stocker so thats why i just ported mine by myself.

you dont really need a bigger throttle body until you get to the 3.0 pulley area, which is usually achieved with an intercooler and rockers/cam. even then its not going to net you that much power if any at all.

I agree... however, I had to change from my 3" FWI to a 4" .... since I am cammed and its choking, I am going to have start looking for a new MAF since im starting to Max it out now. Never had this issue, until i went cammed and put on the 3.3"

Originally Posted by Bio248

there is no reason to ever buy a modded stock throttle body when it takes a half hour to hog one out yourself.

Is there a good write up with pics showing what to hog out somewhere?

THANKS!

isnt there a guy on here named reptile that ports TB's for a good price?

yes, but its so easy to do on your own. in fact, if you sent me a throttle body with $20 taped to it id do it for you. it takes like an hour.

I like the N* feel at part throttle, you barely have to touch the gas. Its kind of stupid though when you feel you give 80% then you go 100% and the car doesn't go any faster.

if i get my stock tb ported will i need to get it re tuned?

Originally Posted by AmericanSoldier

if i get my stock tb ported will i need to get it re tuned?

your MAF table will be off, so yes.

Originally Posted by Bio248

yes, but its so easy to do on your own. in fact, if you sent me a throttle body with $20 taped to it id do it for you. it takes like an hour.

Do have any pics of what we are supposed to do? I've got a dremmel and access to a die grinder. I haven't taken the TB off to look at it to see what's needed.

Are you talking about knocking down walls, just smoothing somthing down, or enlarging the bore?

THANKS!

on the stock throttle body you cant enlarge it much more than stock without breaking through the outside of the casting, which youll probably do in some areas anyway since its so thin to begin with. if you look down the throttle body, any part that is exposed farther out than the overall diamter of the casting youre going to want to smooth out so it is completely round. the main thing here that is in the way is going to be the MAF hump in the upper center.

when you start taking material away, youll break through the casting like the majority of us have when porting. i just used some aluminum epoxy and smoothed everything out so it was round and straight through with nothing exposed in the way of the air path. other than that just smooth everything out and let it be. you can enlarge the backside of the throttle body that is behind the throttle plate, but it only helps if the blower is machined out to be the same size so i left mine alone. make sure you DO NOT touch anything near where the throttle plate will seal.

this is all good to know thanks all