The stock TB and 2.5" piping will take you a long way. I've seen several people go sub 10.0 on that setup. I'd stay away from the accufab TB if you're looking to upgrade. I've heard of many instances where they've fallen apart and cause catastrophic engine damage. The Q45 TB is a great upgrade and can be obtained pretty cheap. Wiring it in is relatively simple. You can either wire in the Q45 TPS or get a mount machined to fit the Mitsu TPS. Once you go Q45, definitely upgrade your piping to 3".

 

Yea, I have mostly heard of the accufab tb's breaking, and not so much about the q45. I mainly wanted to see if anybody using them has had any issues with them, because like you said, it can be had for pretty cheap.

 

I just won one on eBay the other day so i'll be putting it on relatively soon. I'll post feedback once I get it running.

 

Sounds great. Thats where I plan on getting mine (and a lot of other things too because I'm a poor high school kid lol).

 

Oh yea, my setup is: 2.3L stroker, holset hx-40, sbr mani w/ 38mm ext. wg, 1g unported(for now) head, bc 280's, crower springs and retainers, etc. etc. FMIC is to be decided on later, but with a tial 50mm bov, and either 2.5 or 3 inch piping.

Doesn't sound like you're doing too bad.

 

haha yea, that comes from a loooong time of working at a local Culver's lol.

 

I have a Q45 TB on a JMF smim and 3" pipes. It's a nice setup. You'll need to move your battery since the pipes run right through that space.

You'll need to fab a simple bracket to hold the throttle cable to the smim so it's at the right angle. The hole for the throttle cable end is too small, so the hole needs to be drilled out bigger. That's easy.
Hal at Colorado DSM (CODSM?) can make a TPS adapter so your stock TPS sensor can bolt on. also easy.
If you plan on running over 25psi of boost the TB can stick open slightly, raising idle to about 2k to 3k rpm. If this happens to you let me know. It happened to me, so I found a way to fix it.

 

haha yea, that comes from a loooong time of working at a local Culver's lol.

That had too be a loooong time at culver's i used to work there when i was 16 couldnt make anything atleast not enough to support my 3000gt.

But as far as teh TB ive seen a lot of success with them and they seem to work well ive been looking at picking one up also but wondered if the flange matches up with the JMF intake manifold or if you'd need to make your own?

 

Hal at Colorado DSM (CODSM?) can make a TPS adapter so your stock TPS sensor can bolt on.

ACK! I missed the cutoff time to edit my post!

Hal can be found at RMDSM.org, which is Rocky Mountain DSM, not codsm. my bad.

 

but wondered if the flange matches up with the JMF intake manifold or if you'd need to make your own?

The flange is NOT the same. You can however order the JMF SMIM with the Q45 flange though. ...or get yours reflanged if you have one already.

 

The flange is NOT the same. You can however order the JMF SMIM with the Q45 flange though. ...or get yours reflanged if you have one already.

Yeah after looking at them i noticed they weren't just wasn't sure if JMF made flanges for them, thanks for the info.

 

I have this set up. Its just as easy to wire in the q45 tps since that is what I did. It is a 3 wire so you need a way to simulate the idle switch for 2g guys. I do this with dsmlink. I run an odyssey battery iun the stock location, a 3.5" 90* elbow off of the TB into a 3.5" mas, then a 3.5 to 2.5 reducer to my normal IC pipes. I also didn't have to do any of the above fabbing to the throttle cable bracket.

 

Centx....do you happen to have the wiring diagram to wire in the Q45 TPS onto a DSM?

 

haha yep apexi ive been workin there since I was 16, and now I am 18.

and like 11sec said, do you happen to have a wiring diagram centx? How are you liking this tb? Did you go right from stock to this, or did you have a stock tb on the JMF before, or some other combo? Notice any big gains?

 

Centx....do you happen to have the wiring diagram to wire in the Q45 TPS onto a DSM?

I can glance at mine for the 2g side, but the q45 tps wires are red (+), white(signal), and black (ground). You'll want to use the pigtail coming from the top of the tps sensor as opposed to the wires coming to the front.

 

Thanks...I can go from there.

 

I guess I dont' see the point in running 2.5" pipes into a 4" TB

 

Mine was more of an effort to get the car runing without taking anywhere to get a new core/piping made. Besides, its not like its 95mm at the throttle plate.

 

I plan on useing 2.5" piping with a q45 TB.

Its not that big of a difference 2.5" intake piping to (80mm) 3.14" tb

If you already have the 2.5 ran just use it in my opinion.

 

You'll need to fab a simple bracket to hold the throttle cable to the smim so it's at the right angle.

On only a few of the first models that went out with the Q45 flange this is the case. Now a taller throttle cable bracket comes standard for those that get the Q45 flange. I believe centxdsm has one of those models because it looks to be peeking out behind his plenum in the one picture.

 

On only a few of the first models that went out with the Q45 flange this is the case. Now a taller throttle cable bracket comes standard for those that get the Q45 flange. I believe centxdsm has one of those models because it looks to be peeking out behind his plenum in the one picture.

Yah...I've got a big........bracket

I did have to adjust the screws on the TB as the throttle cable I was using was at the end of its adjustment range. It ran fine but it had a slight numbness to the begining of the pedal travel. All fixed now though.

 

Hey I have a JM Fab with a q45 for sale $430 shipped

 

I need to get the details ironed out on my JMF SMIM I am getting from JNZ GB.

I need to decide on a Throttle body flange.

I have ruled out the Accufab and BBK due to bad things I have been reading today.

That leaves 2g , 1G or Q45.

I am currently running a forced performance Big28, HRC sidemount IC, Greddy hard pipes.

One day I will probably upgrade to FP3052.

Driveability is my numero uno concern.

I am currently leaning toward the 1g, followed by the q45.

Any suggestions would be much appreciated.

Thanks,

-Neal

 

I would stick with the 1g TB. It's good for 9s as shown by Shepherd and you can keep the TPS, FIAV and ISC hooked up and working right if desired.

 

If your goal is the 3052, the 1g TB will support that easily. No need for the q45 tb unless you're flowing massive amounts.