american thunda

iTrader: (1)

ive been thinking about getting a bigger throttle body for my car here the last few weeks....(my lt1)...i was wondering ....With my mods ...will i really see a big performance difference with a bigger throttle body... ???? and how big of one should i get????

the_merv

iTrader: (88)

It will be good for you, you got forced induction..

streetwarrior96

only when you get more cubes. If your staying pretty much stock I would'nt go past 52mm

Formula350

iTrader: (3)

If you get a good deal on a 58, it won't hurt. My TPI, I found a good deal on a 58mm BBK, so I got it. Ported my upper plenum to match the 58mm (acctually I made it to match a mono-blade if I had one heh) and I noticed a substantial gain. Even with all the nay-say about 58mm on mostly stock motor. The gain is more than the loss at 58mm. Then you always have it when/if you punch more cubes out of the motor.

My TPI is identical to my 93's TB except for the TPS, which I'm converting. So I'll be slapping that 58 on my here soon.

GIZMO

iTrader: (8)

Do you have data to back that up? If so, please elaborate.


Daren

american thunda

iTrader: (1)

thats what i was thinking.....

DroppedM6Z

iTrader: (5)

Stock cubes= stock TB.....The only reason i bought a Holley was because its pretty

Formula350

iTrader: (3)

No data sorry. Back of my head in the headrest was enough 'data' acquisition I needed lol

the_merv

iTrader: (88)

He is forced Induction, his goal is to get in alot of air..

lt197formula

iTrader: (6)

If you're forced induction or a pretty aggressive h/c setup with stock cubes or bigger then you will benefit from a larger throttle body and ported intake manifold.

94FBIRD

iTrader: (5)

I'm not that guy, but I do have an instumented gain going from my stock 48mm to a BBK 58mm. I gained 12 rwhp on the Dynojet, swapping the the TBs on the dyno(I previously opened the intake up to a 58mm opening). I wasn't stock at time, having the HOT cam, ported heads and all the other intake and exhaust bolt-ons.

Gun5

iTrader: (37)

ya im thinking ill get around a 10-12 gain with me going 48mm to 52mm (58mm on my cam and urs is overkill) definitly good for $150

buffman

iTrader: (9)

gains from larger TBs come with increasing engine operating range. Simply note if you measure you're vacuum at WOT and you have more than 2" of it, then you have an intake restriction, whether it be the intake tubing, filter, or the TB.

GIZMO

iTrader: (8)

How much of a tuning change did you make after the swap? What was you AFR before and after?

Thanks,

Daren

Taubr Unit

iTrader: (32)

i traded my fog lights for a 58mm tb, hella deal! So i have that on my car and it works awsome. Cant wait till i get everything tuned for each other. I got a intake and LT's dumped to help with the extra air getting out. So everything is flowing real good. And i didnt lose ANY low end power like everyone says. If your gonna upgrade, its a waste of money to go in "steps", just buy a 58 and call it a day.

buffman

iTrader: (9)

only tuning required from what i've read is to increase line pressure on automatic cars..

mike1500

iTrader: (3)

Not alot with out supporting mods