3500 throttle body

[gar70614]

my question is what is my best bet for a throttle body on a 3500. i know i could use a 3400 throttle body wot the wot-tec adapter but what are my other options. ive heard mustang tb with some modification any other ideas or details?

[gar70614]

fyi it is a 3500 in a third gen cav with grand am 3400 ecm and wiring

[IsaacHayes]

1) The WOT adapter and their 65mm TB.
or
2) an LX5 TB and the adapter they sell there. I sort of got that started. LX5= 3.5 DOHC olds motor. It's 65mm.

Pics and info about your project!! That will be fast. Even the 3rd gen cavys weigh less than my beretta!

[gar70614]

it is in the begining stages i got got a 97 z24 to do the swap but then blew the motor in my 99 z yesterday so thats the new car to get the swap im going to hope fully get the motor and nvg trans in a couple weeks and get started its all ive been able to think about lol

[gar70614]

i like the 3.5 dohc idea that sounds good 65mm without the billit price tag. u know of anyone using the mustang tb ive seen that kind of looked like your idea to and wat about the idle air control in using that.

[bszopi]

To us a Ford TB and a GM IAC valve, you can build the following adapter that will bolt up to the 3500 plenum:

http://60degreev6.com/forum/gallery/browseimages.php?c=17&userid=

I have the CAD file around here somewhere. I can make it a PDF to give you all the dimensions needed. Basically just takes a block of aluminum, various drill bits and a drill press.

[ForcedFirebird]

To us a Ford TB and a GM IAC valve, you can build the following adapter that will bolt up to the 3500 plenum:

http://60degreev6.com/forum/gallery/browseimages.php?c=17&userid=

I have the CAD file around here somewhere. I can make it a PDF to give you all the dimensions needed. Basically just takes a block of aluminum, various drill bits and a drill press.

I'll take one in .iges or .dwg/dxf please :P

Takes more work to use the Ford TB, not only do you have to make the IAC adapter, the TPS isn't correct. The LX9 TB is plug and play (just need to mod your throttle cable bracket), the TCE TB is bolt on and go.

[bszopi]

Here is the PDF, as well as the DWG.

[IsaacHayes]

The ford TB is too much work when the LX5 and an adapter works like stock. The ford you have to loose the IAC, then splice TPS connector wiring, make a throttle cable bracket, the throttle cable comes from the backside not front, etc etc.

LX5 you just bolt on and go other than cutting the top of the 3400/3100 cable bracket shorter bending it down and drilling and taping a bolt to hold it to the "arm" of the TB that has the throttle stop. Or weld on a tab of metal like I did to bolt to the TB face..

I used a thin but strong (stainless) piece of scrap and my friend TIG'ed it on.



So yup like FF said. Easiest CNC 65mm. 2nd, LX5. Least Ford TB. (ford TB needs no adapter though, but tons of other work).

[gar70614]

yea lx5 looks like the way to go thanx guys ill be sure to post pics wen through the stages of the swap.

[ForcedFirebird]

Here is the PDF, as well as the DWG.

Sweet You're the man...

I have a list of things you can CAD if you would like J/K

Been trying out a raster to vector (Vector Magic) program and it works pretty good to get a copy, but not quite master yet.



Gar, make sure you let us see it when you get 're done

[double00bu]

I would like to add to this.
I have heard of people adapting a 5.3L chevy throttle body.

Anyone hear of that?

[IsaacHayes]

5.3L should be 75mm like the northstar one.