Tb boring ?

[Juggalo]

i was wondering how much you can bore out the TB before it gets to thin or whatever.. i found 1 laying in the basement that i forgot about! i have a dremel and everything so i was gonna give it a try.. has anyone done it their self? can't be that hard is it? stock TB's are what about 53mm? i should be able to get it out to 60mm right? if anyone knows let me know.. thanks!

[GTPSPEED]

it is pretty easy i did mine like that,you really can only take out that little lip,other wise you need a bigger butterfly valve.

[SilvrEclipse]

I believe the stock one is 48mm. You cant bore a throttle body with a dremel, you can gring out the lip inside of it. I used a dremel with the sandpaper disc and that worked pretty well. Give it a try, you have nothing to lose if its a spare.

[Juggalo]

my brother-in-law works at a machine shop and can make a bigger butterfly for me its not a problem.. about what size do u guys think u made urs? any noticable gains? thanks for the help

[ashah000]

I would do 55mm, anything above that is gonna get thin on the stock TB.

If you are not going turbo anything above 55 is gonna be too much, i have a 60 mm TB right now and a 55 would of been a better choice IMO.

[GTPSPEED]

wow ash is back,,,,well i did mine with a dremel it worked great it was taking shit loads out but like you said i could only take out the lip,,and not much of a gain.

[Talon69]

since you can pick up a 1g TB for likw $50 that sounds like the easier way to go. Maybe i will mess with my 2g TB before i get a 1g, i also have a machineshop at my work. I think its pointless doing it unless your changing the butterfly.

[Juggalo]

how big are the 1g tb's.. are they 55mm stock or bigger?

[GTPSPEED]

yes there bigger,i also saw one from a jeep coverted to fit,,it was like 60mm check it out and google it

[david-b]

The 1Gs won't work for the 420a. Totally different TB. Aren't those like 57mm or 63mm? FOr some reason that sounds familiar.

I'm getting mine done at a 55mm. Once I recieve my spare one, itll be sent out ASAP. Looking forward to that actually

[gthompson97]

Originally Posted by bostonjoe98gs

yes there bigger,i also saw one from a jeep coverted to fit,,it was like 60mm check it out and google it

Here's the link if you're interested in doing the jeep conversion.
http://www.dimensia.com:81/jimbo/JeepTBfor2gnt.html

[Juggalo]

that seems like a shit load of work lol .. if i can get mine out to 55mm 58mm that would be great.. ill settle for 55 if i have to. like i said i have a extra one layin down in the basement so even if i mess it up its no biggie. money's kinda tight with the baby and everything so all the stuff i can do w/ extra parts is gonna get done lol! thanks for the link maybe in the future if i have a day to kill ill give it a try!

[TTalon]

first off -- taking of the lip isnt boring anything. Its porting at best.
2nd its a total waste of time.

Toss a 1g n/t on there (so you can loose the t/b elbow)
or a 1g-t throttle body. then spend your time port matching the intake to match the
new t/b-
seeings how your NT 420a - you may want to look into tossing a mustang t/b on there.

FYI 1g t/b's are 60mm compaire to 2g's 54mm

1g = left side 2g = right

[gthompson97]

Originally Posted by TTalon

Toss a 1g n/t on there (so you can loose the t/b elbow)
or a 1g-t throttle body. then spend your time port matching the intake to match the
new t/b-

He's running a 420a, not a 4g63. The 1g will NOT fit.

[TTalon]

Originally Posted by TTalon

seeings how your NT 420a - you may want to look into tossing a mustang t/b on there.

thats why i said that lil part -
the rest of the info was more to answer everyone else asking about the sizes