Other vehicle Throttle Bodies with same bolt pattern

9

97LanMR(CE1)

New Member
I was wondering if anyone has experimented or found a throttle body from other vehicles which matches with intake manifold on a 4g93, wondering if I could buy a larger throttle body cheaper by buying an OEM throttle body out of another vehicle
 
there is a Magna one I believe from the 4cyl engines there is I believe and 'evo'/ 4g63 throttle body and one from the 4g94 2.0l that I know of
 
Jimmib said:
there is a Magna one I believe from the 4cyl engines there is I believe and 'evo'/ 4g63 throttle body and one from the 4g94 2.0l that I know of
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Is there much difference between those and the stock one, would've thought they would be similar except for the evo TB.
 
As far as I am aware the bolt holes are all the same the Idle control all likes up the only thing (which is the case with all larger throttles) is that the opening will step down from the back of the TB to the IM as the IM is I forget specifics so say 50mm whereas TB is 55mm so you will need to trace out and remove material so that there is no longer a step between them.
 
I’ve had two different ones.
One from a Magna and another from an Evo6

But you should get your inlet manifold port matched to the throttle bodies bigger size.
Otherwise it’ll run like *poo*.
 
Definitely runs like poo haha, is that just because of ports not being matched or is there an underlying issue that I may need to resolve, also running real lean, could I hook up a wide band oxygen sensor without a tune or will it give me more issues?
 
The IACV and TPS arent set to suit a throttle body that will flow X-cfm, unlike the stock IACV and TPS that are paired to the stock throttle body flowing Y-cfm.. You need a tune to properly use it.
 
98LanMR(CE1) said:
Could I trick the system by swapping the sensors to the stock ones?
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You can try - its been done before with different amounts of success.

Its helpful to remember it like this:
Stock TB with the IACV set to stock (4% open) allows a flow of say 25gm/s.
A larger TB with the larger IACV set to stock (4% open) allows flow of 32gm/s.
Larger TB with stock IACV set to stock (4%) isnt the same as the 4% of the smaller TB, as the larger diameter of the new TB can let slip more air, and as such the stock IACV needs to be smaller than stock to keep it all aligned.. This is dependant on the engine efficiency to a degree, but its enough to throw out a nice clean idle
 
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