Getting Rebel throtle body adapter upgrade
Question what is the largest throtle body that can be installed and which car would it come out of. thanks
Any ideas. Being put on Rebel Turbo kit with intercooler

 

Just to let you know ssyeller, when you upgrade the throttle body, you lose alot of daily driveability. It makes your throttle response soo touchy that alot of members have went back to stock throttle body. IMHO, just not worth it. I drive my car everday to and from work and sometimes we throw the kids in the back and just go on cruises with friends. I don't want that touchiness to ruin a nice cruise.

 

Um...no...it's an excellent cheap upgrade.

Say hi to Borat's brother for me.

 

I need a bigger TB. The stock TB is going to KILL my motor, just too damn small. It should help to improve my throttle responce. I want to do a LS2 throttle body

 

The LS4 one is like 12 or 15mm larger, that should be enough. Or get a BBK aftermarket one if need be, they are also calibrated a little better for drivability, as they are designed to work on a stock computer as a bolt-on, despite being larger.

 

link? just curious if it is really worth it the hp gains? or is it that 5hp maybe or is it like an intake so a minor difference but in a race it could give you the edge?

my feelings are if you mess with something too much and on stock tune or gm's tune it could just end up hurting me or am i completely wrong?

just from what i have seen maybe i've seen wack ass cars but ssdan's car got slower with stock dp gutted and ark exhaust.

bwsw214 same case got zzp catless dp + ark exhaust on gm stage 2 kit and the car got slower. raced me then same day took it off got the stock exhaust and stock dp back on b/c the zzp one broke and his car got faster? i am talking about a 2-3 car difference with putting the stock exhaust back on. same car same driver same skill. we even switched cars still door to door race. same style shifting. it sounds completely retarded but seen it 3 times. also a kid with magnaflow exhaust his car got slower in races. race and even or close enough then put on a aftermarket pipe and exhaust and all of a sudden fall back even more? not sure of what the causes are maybe it's cause they were on only gm stage 2 tune? not a clue but that is the reason why i have haven't switched exhausts or bothered. only things i've thought about are headers and downpipe which i pm'd you about joe.

idk if anyone can help me or tell me why this happened that would be cool. i was stumped too for a while and just gave up and said our cars don't like catless dp's + aftermarket exhausts on gm's tune.

 

You are gonna have to get a used one off of an inline truck motor, Trailblazer 4.2L or any Colorado/Canyon/H3. I believe others work, but thats the most common one. You will also need to get an adaptor for it to clear the blower, or port the inlet of the blower enough to clear the larger blade.

You won't see big power gains, especially someone like you with minimal flow mods. I'd wait until you get more work done.

 

look at it this way...the cons are higher then the pros...highly tuned TVS powered cobalts can barely pull 9whp out of the tb...its like a short shifter...cool to say u have one but u'll never be in a race so close to where if u win u can say it was my throttle body that won that for me..or short shifter

 

At that level, 9hp would be enough to make me get one, but on a stockish car, where the gains are virtually non-existant, I'd avoid it.

 

gotcha, anyone want to explain the whole exhaust situation to me? loose power down low maybe gain some up top? i am still stumped as i have heard cobalts loose power with exhaust and it is just a noise factor that gets people to think it is going faster?

seriously no bullshit i can get vid's up. same day even switch driver the car with a catless dp and aftermarket exhaust just looses power? why?

 

You need it to help with the extra air you are introducing with the nitrous. I don't care about on a stock car, but with nitrous you need exhaust, at least replace the stock muffler with something better flowing, and get rid of the cat. That will help you get more out of the power you are throwing at the car, reduce EGT and Cyl Pressure, decreasing the risk of knock and other bad ****.

 

very true..u get to the point to where a restriction can cause exhaust to stay in the chamber and not get enough clean intake air in there.

 

#1 restriction of the stock LSJ is the exhaust ports. Definitely some of the shittiest stock exhaust ports I've ever seen. You do a massive port and polish job like on my head, your looking at a minimum of 30 hp gain. Larger valves will increase it more, and cams obviously even more. Seriously, people don't realize, the way to REALLY get a lot of extra power is in the head, NOT the header/exhaust.

 

i agree. it's cool to say i have the ls4 tb on my car, but the thing is so damn touchy. it's been on there for about 2 weeks now and I'm getting used to it. when i first put it on, it was so sensitive that i was jack-rabbiting and it looked like i never drove a stick.

that being said, it gave me a shitload of low end torque and gives it right where you want it. say on the freeway, in 5th, i don't even have to downshift. say you give 25% throttle, you'll be letting in x amount more air than you did with the stocker. i see about 1-3 more psi of boost in the low rpms, nothing really changed up top

i'm not going to go back to stock - just like any other performance part that you put on your car, it changes the driveability a bit, so you gotta get used to it. nothing you can't handle

^agreed as well. if you got the time/money, this would be the most effective way of making a freer-flowing system

 

i hope this is a general statement and not pointed towards me..cuz my head was ported well before urs lol