Stock TB maf hump removal

**Alucarus99gt** · 03-16-2010

Hey I was wondering if anyone has removed the hump on their stock throttle body? I've tried finding info on it but I've been unsuccesful. Has anyone done it?

**Bio248** · 03-16-2010

i have. what do you want to know about it?

a) smooth it all out so its round how it is supposed to be
b) you will break through the casting, so be prepared with some metal epoxy.

**BwolfGT** · 03-16-2010

Yeah just get it ported, or just get a northstar.

**Alucarus99gt** · 03-17-2010

Eeeek... There's no way to not break through the casting? I was wondering if the gains of taking out the hump are actually worth it. I don't wanna get the northstar cuz I don't wanna open it up that much. Basically what I want to do so far is do basic mods at this point. I ordered a 2.5" dp with cat, overkill pcm, and made my own intake (which looks awesome by the way) haha. Do you guys know how much hp gain you can actually get from that typical setup?

**rynoman03** · 03-17-2010

You wasted money on the 2.5 dp. GO 3 " or Headers.

**Bio248** · 03-17-2010

you wont gain much of anything seeing as how your car is n/a.

**BwolfGT** · 03-17-2010

With being n/a and minimal mods TB work wont do much of anything except maybe improve responsiveness

**Alucarus99gt** · 03-18-2010

Really? I would think it should do a descent amount no?
And to answer the other dude no I don't think the 2.5 is a waist of money because the rest of the stock exhaust is 2.5" so having 3" on 3 feet of your exhaust when the rest is 2.5 it does nothing. I don't know why everyone thinks the 3" is so much better. Bigger isn't always better. Some guys even think that the 2.5 is better because 3800's like some back pressure. But anyway well I guess I'll have to deal with my somewhat peppy grand prix till I can get my camaro. Haha. Wanted a 4th gen LS1 for a long time. It's so hard to find a good deal on one though.

**Bio248** · 03-18-2010

3800s dont need back pressure.

**Scimmia** · 03-18-2010

Originally Posted by Bio248

3800s dont need back pressure.

You're right, but they do need exhaust velocity. Alucarus99gt may be wrong about why, but bigger is not always better, especially on a nearly stock L36.

Alucarus99gt, the reason you won't see that much improvement from the TB is because it's already big enough stock. Going to the N* or LS1 TB may actually hurt you, as you'd be losing velocity. As you said, bigger is not always better.

**BwolfGT** · 03-18-2010

Originally Posted by Scimmia

You're right, but they do need exhaust velocity. Alucarus99gt may be wrong about why, but bigger is not always better, especially on a nearly stock L36.

Alucarus99gt, the reason you won't see that much improvement from the TB is because it's already big enough stock. Going to the N* or LS1 TB may actually hurt you, as you'd be losing velocity. As you said, bigger is not always better.

So you think I'll lose power by adding the N* TB?

**Scimmia** · 03-18-2010

Originally Posted by BwolfGT

So you think I'll lose power by adding the N* TB?

No, not at all. A stock L36 is very different from your modded top swapped L36. Once you have the blower on, velocity on that side of the blower is pretty much moot, you just need to get air in.

**BwolfGT** · 03-18-2010

Originally Posted by Scimmia

No, not at all. A stock L36 is very different from your modded top swapped L36. Once you have the blower on, velocity on that side of the blower is pretty much moot, you just need to get air in.

Makes sense, thanks.

**Bio248** · 03-18-2010

i think the 3800 has enough displacement to pressurize a 3" downpipe as effectively as it would a 2.5" downpipe. i also liked how the powerband would move up a little since we all know these cars have more low end torque then we know what to do with, even n/a.

**98GTPCALGARY** · 03-19-2010

lets see this custom intake???

**Bio248** · 03-19-2010

thanks scim, didnt want to have to do that.

**Alucarus99gt** · 03-21-2010

Well whatever! You know what I meant. Hahaha. And Ya you're right about the TB. Haha. Didn't even think about that. See thats something I would have thought about right as I'm putting it back on the car. Haha.