throtle bodies
 

I am building a 2.4L, and when it came to the intake and throtle body I had to stop and scratch my head. The intake manifold is going to be made, but I was wondering what should I have it flanged to? I have heard and seen the size of the q45 and it is about 90mm. I was wondering if any one has used this and what it took to make it work, or any other ideas for a throtle body?

Re: throtle bodies
 

Q45 is all the rage. What is the rest of your setup? A stock 1g would probably be fine.

Re: throtle bodies
 

:postalot:

Actually, give us your mods list so we can recommend the proper throttle body.

Re: throtle bodies
 

You can get a huge TB, just tune for it.

Re: throtle bodies
 

the rest of my setup consists of; egal h beams, wiseco 9.1:1, 860 fic injectors, 255 walbro, 1mm oversized valves under cut andswirl polised, crower springs and retainers, in a cnc ported 2g head, sbr tubular exhaust mani, the link, true gt3582r, maftranslater with 3in gm maf, oh and comps 272s wich accutually are a 262@50, and all of this is in a 7 bolt 2.4L

Re: throtle bodies
 

I would stick with the stock TB, no need to mess with a bigger one at that point. Stock TB has run 9's.

Re: throtle bodies
 

do you know what the q45 will flow over stock 2 1/8. for 70 bucks I thought it would be worth not bottle necking it there? does it cause any problems going with a larger than needed tb? and what is the tps like on the q45? do i just need to wire in that pig tail, or are the resistance levels different and have to retro fit the stock tps on to it? any little hints will help.

Re: throtle bodies
 

The larger TB will make it harder to tune. Bottle necks in piping are odd if you don't know fluid dynamics. They add up over a length, so a short bottle neck like the TB really doesn't mean a ton, especially at lower flow levels. That being said it will still be a restriction. Are you going with 3" IC pipes and a free flowing FMIC? If you are going 2.5" pipes, don't bother with the TB, use a 1g one.

Re: throtle bodies
 

yes, sorry it will be 3" charge piping. with an intercooler said to have a very high flow rate, cant remembere numbers but that is why I chose the one i did. My hole thinking was to reduce the amount of restrictions as much as possible. let that air pump work! right?

Re: throtle bodies
 

Get the 3" in there for when you wanna make 700+whp and ditch that 35r. Do it once, do it right, right?

Re: throtle bodies
 

75mm is just a hair bigger than 3" piping. That's what I have on mine, works great.

Re: throtle bodies
 

So what it sounds like so far is the bigger the tb the harder to tune. Unless I want a ton of horse power it is worthless to spend the 70 bucks on a q45, and spend just a little less for a much smaller one like a 1g, just to replace it if I ever want to run e85 or any thing that would out run the 1g? I am not trying to argue with you but it fails to make sense, unless it is a huge pain in the ass to deal with? does anyone know about the tps and what is involved to make it work?

Re: throtle bodies
 

Buy your Q45 Tbody and have fun with it. For $70, try it and see how you like it. Then come back to this thread and tell us your results. You seem to know as much as most everyone on this board about that Tbody. The one or two people on here that may have that Tbody(or any personal experience with it),obviously are not seeing or responding to this thread. For the most part when you go down that route, you just have to figure it out. This forum isn't the one you're going to get the tech info your looking for for that Tbody. I'd guess NABR is your answer.

Re: throtle bodies
 

I like the Q45 TB a lot. I got it back when they only other ppl running it were a couple Puerto Ricans and it wasn't on DSMs. It's easy to use and has a progressive linkage that makes it drive a lot smoother than the aftermarket Ford throttle bodies. You might not need it though. TBs haven't proven to be a big gain, people make 600+ on stock 1G throttle bodies. They are a popular upgrade on all-motor cars, where they usually do absolutely nothing. Also, on DSMs, the idle motor is on the throttle body, so you would be giving up idle control, unless you build some crazy setup to retain the stock idle motor or goto an AEM EMS and wire in a Ford IAC.

Re: throtle bodies
 

thanks for your inputs. I will just have to see what happens like you said. If you are interested I will post what I find. Thanks agin for your time.

Re: throtle bodies
 

What did you have to do with the tps?

Re: throtle bodies
 

Nothing, I have an AEM EMS.

Re: throtle bodies
 

ahh thanks.

Re: throtle bodies
 

Sitting in a box? :nod:

Re: throtle bodies
 

You can weld a nub onto the throtle body shaft of the Q45 and bolt the 90 TPS sensor right on to the TB, or if you have a EMS or similar and a working TPS sensor for the Q45 then you are set. It sounds like a 75mm TB would work for your setup, if you wanted to go bigger then stock.

~John