is there any way to get a bigger throttle body or an adapter to get a different one I would just get an ss but this is my dead grandmas car. if there isn’t i’ll just engine swap tbh

2004 3.4 liter Ls

 

This is a pretty wild topic. SO if you cannot get a bigger throttle body, you will engine swap it. I guess it comes down to "what are you trying to accomplish".
The 3400 is more popular in the N-Body/Grand Am crowd, but yes, there are bigger throttle body options.

Or you can half shaft your throttle body. I did this on my 3400 Grand Am years ago. Here is the right up:
https://montecarloforum.com/forum/fw...hafting-56966/

Here is another thread you might find value in:
https://montecarloforum.com/forum/fw...p-power-46071/

 

I thought these looked kinda close to where I could just cut this off but now that I look at it the hole might be really small compared to the 80mm

 

do you have a link to the ones I can get

 

 

if not i’ll just clean up my current one and save up

 

LX5 TB swap kit (65mm):

https://www.wot-tech.com/lx5-throttle-body-package.html

Keep in mind that you'll likely either need to open the inlet port on the UIM or swap to a 3500 intake setup (which has its own complications) at the same time to avoid creating a step.


If engine swapping is on the table, I'd absolutely go for that instead. Youll get much better bang for the buck out of even a stock L67 swap - plus much easier modding going forward.


A good point of reference is the LX9 engine (early 3500 - pre vvt) as they are very similar to the 3400 you have. They also had a 65mm TB like you're considering upgrading to, but also have more displacement, better flowing heads, a better LIM, and supposedly much better UIM - and still only make 200 +/- crank hp. As you can imagine, just upgrading to one of those improvements isn't going to have a major impact on hp - likely only single digits at the crank.