l 95 Trans Am l

iTrader: (5)

Im looking at buying a Professional products 58mm TB. Is there a noticable difference on a stock internal LT1?

1badzee

iTrader: (12)

For the mods in your sig? No.

speed_demon24

iTrader: (6)

You'll gain a ton of throttle response.

BOLO

iTrader: (40)

+2. Especially with a good cold air intake system

slomarao

iTrader: (6)

not worth it for your mods. Wait til you have H+C to do one.

323steel36

Well unless you have a good cai, catback to let the air out and headers it might help. in which this case you do. Ive heard a copule of people that they put that size of tb and felt no difference? idk i would do more research before buying it lol. theyre expensive especially for the BBK ones.

SexyTransAm

iTrader: (6)

think bout a 52mm

STOCKTA

iTrader: (8)

He does have a 6 speed in it so driving around throttle response will be better with the 58MM. I thought my 52MM TB on my 6speed car with boltson's woke it up when tipping into the throttle coming out of turns, was a fun mod and even if it didnt gain peak horsepower.

VinR1

iTrader: (17)

I've got an old GM High Tech I read when on the can and they did a 355 build with the Edelbrock heads and intake - picked up something like 1.8hp (one point eight) going from a 52 to 58mm TB at 6600rpm

Travis Johnson

iTrader: (2)

It might gain throttle response because it has a larger opening at small throttle positions than stock. But you could save the $200 and just push the pedal harder to get the same effect.

96capricemgr

iTrader: (1)

The Edelbrock heads/cam/intake are such garbage we don't need to talk about what they did other than to keep saying they are garbage so newbs don't buy them.

A PROPER heads and cam setup will make more power at the wheels than their junk does at the flywheel.

To run a 58mm TB you have to open up the intake, I wouldn't bother with that till doing heads and cam.

There are dyno tests that suggest some gain on an otherwise stock engine but there are better ways to spend money on an otherwise stock engine.

MasterTomos

iTrader: (15)

58mm throttle body would be worthless on a bolt-on car. People usually upgrade when they have heads/cam/intake at least and redline a lot higher. 52mm may even be overkill for a bolt on car...

kinglt-1

iTrader: (26)

stock is sufficient for boltons only... as stated its not worth it until you do a heads/cam/ intake setup.

95ImpSS

iTrader: (2)

For kicks & giggles... what if one had:

1. Heads (195cc, 205cc, etc)
2. Cam (custom grind, etc... pick your poison)
3. CAI
4. Aftermarket Exhaust (LT's, no cats, high flow mufflers)
5. Ported Intake

But.... STOCK BOTTOM END?!?!?!

Young Maro

iTrader: (5)

^^^ If I were you I would be saving up for a new bottom end when that thing explodes

95ImpSS

iTrader: (2)

Wouldn't that be a true statement if I swung the snot outta that motor? I've been hearing that stock LT1s don't like spinning higher than 6200-ish. I'm not looking for a monster motor. But a descent cruiser with a bit of power & torque to surprise the unexpected.

I've had my share of experimenting with my old C10 w/ the 5.3L bolt-on motor. Didn't swing that higher the 6500, but didn't have ported heads (cam only). This is the first LT1-powered vehicle I own. No plans on this being a high-revving motor.