how big is the throttle body on a lsj? and how big is a ls4 throttle body?
ive searched everywhere and i cant find any numbers

 

https://www.cobaltss.net/forums/show...=throttle+body

there, I did the search for you.

 

i saw that but 3.5" is 89mm, thats a huge ass throttle body. that just didnt seem right to me when i read it thats why i asked.

 

There's all the info you need.

don't be afraid to dig through a thread.

 

From what I have heard the LS4 TVB is just more work than it's worth so people just stick with the stock TB....You have any plans you are looking into for your car?

 

yea i have tons of plans, just need more money haha

 

it's a biased view on the LS4 TB. There is a gain to be had. And if you had 2 cars with the same exact mods race each other, and they were dead even, and then 1 car put the ls4 TB on, that car would definitely start to pull away.

 

i believe it, especially on a blower.

 

Yea, thats what lsjwannabe was telling me. But said because it's so touchy most members just don't bother with it....

 

the touchiness is basically the only negative effect of it. I daily drive my car and I don't want to lose any driveability, but I really don't think that a big throttle body will be that hard to get used to. Now cams, that's something I couldn't get used to. I've done the cam thing and waiting 30min on your car to warm up in 0 degree weather just so you can drive it without the lopiness shutting the car off is just rediculous. A big throttle body should be that bad.

 

this is accurate. after you get used to it, it's just another throttle body. i drive mine as smooth as i ever did the stock one

 

its amazing how the cobalt crowd is starting to sound like the turbo dodge crowd. those guys complain about a mod not doing enough for the car and this mod not worth it and that one, pretty soon you have 15 mods that arent worth doing because they only gain you 3hp a piece but in the end its 20hp over the guy who didnt do it.

 

well put...

 

well said

 

i just had the stocker ported.... the ls4 was a bit to touchy for my dd

 

what did you do with the ls4 tb

 

best quote ever

 

I do feel a noticeable power increase with my LS4 TB and RAW CAI, but it is touchy as hell. I am however used to it now, and can drive it smoothly...

 

i still have it... keepin it in case i want to switch back

 

I want one.

 

touchy...as in?

 

Touchy as in you give it 1/1000th too much gas in 1st or 2nd gear and the car sputters, bucks, and surges like a ****... A small touch is comparable to opening the throttle a lot more on the stock TB. I read something like 30% more throttle for a given position with the LS4. 1st gear is even more unusable than before. Power gains are around 11ft/lbs if I remember correctly... It def takes some getting used to. If it's just you in the car, you can drive it kinda rocky, but it takes some finesse to really drive it smooth...

 

i installed the LS4 TB on my car and it does make it touchy, but with access to hptuners and limiting of 1st gear boost, it isn't so bad. I dunno how much gain is to be had, i heard the stock TB only starts losing Hp at about 400hp.

I still like to believe that it helps at the high rpm range where you're pushing the blower and if i get a TVS then its one part i don't have to buy.

 

There is a thread floating around where RAW dyno'ed it back in the day. Search around. I'm pretty positive most of the gains we in the low end and mid range.. Something like 11 torque. It takes ALOT to max the stock TB even at high rpm's...

 

Down low (3350rpm) we produced 11WTQ and 7WHP
Mid range (4000rpm) we produced 8WTQ and 6WHP
Top end (6000rpm) we produced 12WTQ and 14WHP


that was rebel's gains.