gs throttle body vs. rt throttle body.

5974 Views 21 Replies 7 Participants Last post by quick92rs, Aug 19, 2008

cfeyhris

Discussion Starter · Apr 26, 2008

im sure that this mad has been done many many times. but i have 2 cars a 2002 mitsubishi eclipse gs and a 2004 stratus rt. does anyone know if i were to switch the 2 throttle bodies would the rt have that much of a power loss?

and does anyone know how much bigger the rt throttle body is? maybe like a 1/4 of an inch to 1/2 of an inch. because i am going to boost the car in about 2 weeks

1 - 20 of 22 Posts

steadly2004

· #2 · Apr 26, 2008

cfeyhris said:
im sure that this mad has been done many many times. but i have 2 cars a 2002 mitsubishi eclipse gs and a 2004 stratus rt. does anyone know if i were to switch the 2 throttle bodies would the rt have that much of a power loss?

and does anyone know how much bigger the rt throttle body is? maybe like a 1/4 of an inch to 1/2 of an inch. because i am going to boost the car in about 2 weeks

why not pull them and let us know?

FlashBlueRS

· #3 · Apr 26, 2008

i4 tb's are 54mm and v6's are 60mm

cfeyhris

Discussion Starter · #4 · Apr 26, 2008

see thats the thing i rather get my car turbo ready then to try stuff out ya know what i mean? tonight i took off the exaust manifold.. what a bitch that was.. i should of been left handed.

also ive noticed when i was dropping the pan that right off of the oil filter plate there seems to be what looks like a tap in. idk if that tap is running pressure through it? if not then ill just get the adapter off of greddy

cfeyhris

Discussion Starter · #5 · Apr 26, 2008

well i was looking through the turbo section and i happened to run across this in clouds setup.. and its just what you were asking for..

deff a huge difference

the inlet is the same on each one its just the bore pretty much..

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Pearl01Strat

· #6 · Apr 26, 2008

Would they even bolt right up?

Are you signed up over at 2gstratus.org?

Which car are you boosting, the Stratus or the Eclipse?

cfeyhris

Discussion Starter · #7 · Apr 26, 2008

im boosting the eclipse. my strat is a every day driver and thats the way im going to keep that one. earlier today i was reading that cloud had to shave a little off of the firewall to fit the 60 mm throttle body. and it bolts right up.

Wrenchmonkey

· #8 · Apr 26, 2008

4

Is the Idle air controller the same as a DSM IAC?

New Style DSM/3S IAC

Older Style IAC

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steadly2004

· #9 · Apr 26, 2008

cfeyhris said:
well i was looking through the turbo section and i happened to run across this in clouds setup.. and its just what you were asking for..

deff a huge difference

the inlet is the same on each one its just the bore pretty much..

That picture just convinced me its worth it to swap mine out.

+1 for the work

cfeyhris

Discussion Starter · #10 · Apr 27, 2008

i mean come on now y wouldnt you want to swap that out. i mean look at the picture it tells the story.

cfeyhris

Discussion Starter · #11 · Apr 27, 2008

Wrenchmonkey said:
Is the Idle air controller the same as a DSM IAC?

New Style DSM/3S IAC

Older Style IAC

i cant tell because i cant see the top 2 pictures, but i think that they would be different... someone please correst me if im wrong.

steadly2004

· #12 · Apr 27, 2008

cfeyhris said:
im boosting the eclipse. my strat is a every day driver and thats the way im going to keep that one. earlier today i was reading that cloud had to shave a little off of the firewall to fit the 60 mm throttle body. and it bolts right up.

It comes out to

4cyl (54mm / 25.4) = 2.126 inches

6cyl (60mm / 25.4) = 2.362 inches

Its not that big of a deal, but will probably make a difference. Especially when my whole IC piping is 2.5", and nothing is less than 2.5" from the turbo outlet until the TB. Its worth a try.

cfeyhris

Discussion Starter · #13 · Apr 27, 2008

more air flow= better tuning

cfeyhris

Discussion Starter · #14 · Apr 27, 2008

5

here are some of the clearence problems that i am talking about.

and thats what i have to work with. or i just might get another one from the junk yard. maybe have it bored out to 65mm:hbang:

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steadly2004

· #15 · May 1, 2008

SO.......

I got my junk yard RT TB in the mail today. I pulled everything off, and it looks like it will all mate up nicely without any clearance problems in my engine bay (stratus). There are 2 MAJOR problems that I'm currently contemplating whether or not its worth doing this swap.

1 ------ Will the butterfly even open all the way, since the manifold still has the same inlet (which looks slightly larger than the TB, but not by much), or will it hit and not even open correctly?

2 ------ The coolant line is oriented in a way that prevents it from mounting correctly, so to get it to work I'll have to route the coolant away from the TB and hope it never freezes. This is the mount mentioned below.

*note* one hole also must be tapped, as the 4cyl TB needs to be mounted to the bracket attached to the block, the 6cyl TB has the hole without threads. I guess their intake is so sturdy it doesn't need to be braced on the block.

cfeyhris

Discussion Starter · #16 · May 2, 2008

does the 2.4 stratus have the same intake manifold as the eclipse?

steadly2004

· #17 · May 2, 2008

cfeyhris said:
does the 2.4 stratus have the same intake manifold as the eclipse?

yea

steadly2004

· #18 · May 2, 2008

steadly2004 said:
SO.......

I got my junk yard RT TB in the mail today. I pulled everything off, and it looks like it will all mate up nicely without any clearance problems in my engine bay (stratus). There are 2 MAJOR problems that I'm currently contemplating whether or not its worth doing this swap.

1 ------ Will the butterfly even open all the way, since the manifold still has the same inlet (which looks slightly larger than the TB, but not by much), or will it hit and not even open correctly?

2 ------ The coolant line is oriented in a way that prevents it from mounting correctly, so to get it to work I'll have to route the coolant away from the TB and hope it never freezes. This is the mount mentioned below.

*note* one hole also must be tapped, as the 4cyl TB needs to be mounted to the bracket attached to the block, the 6cyl TB has the hole without threads. I guess their intake is so sturdy it doesn't need to be braced on the block.

So, It doesn't hit when opened. I went outside and checked, and it is spaced pretty far away so the clearance isn't an issue.

The only problem right now is the coolant issue. And the fact that I can't bore out the intake manifold, its thin as shit.

cfeyhris

Discussion Starter · #19 · May 2, 2008

i know exactly what you are saying. the issue that i would have with mine is that i have to take a little bit off the firewall to make it fit. because you have a little more clearence then me. but ill let ya know how mine fits as soon as i get it.

you can bore thoes out but only a little bit

steadly2004

· #20 · Aug 19, 2008

I had it running with the 6cyl TB for a while, but it was idling at 6000rpm, which I didn't like. I re-routed the coolant lines, and left it that way. But so far I just ended up changing it back. I think I might have had the gasket in the wrong way, which would explain the high idle, but for now I am going to concentrate on other aspects of performance and such.

The way I see it right now is after the TB, the manifold inlet is going to be the same size, or pretty much the same size. The stock TB makes a smooth transition between the two sizes, where as if you use the 6cyl, its large, then just a big step to the smaller size. Its not worth it without an aftermarket intake manifold IMO.

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