Q45 throttle body??

[Solow240sx]

Ok guys just looking for some info on the Q45 trottle body swap, What year & model vehicle did they come on?? Also is it a bolt on mod for the redtop sr20det or is there extensive wireing that needs to be done, also does anyone no exactly how much bigger it is then stock?? Thanks a bunch in advance!

[E7-S14]

Q45=too big (but I wouldn't be suprised if they made adapters), if you are doing an Intake upgrade I know it will work fine.

You can use the bigger NA SR unit.

i asked this question in another thread and thats the answer i got.

i did want to find out how much bigger it is over stockand i do want to know if its possible to make ti work

and whats the biggest SR Unit that will work..

[supreamS14]

Ok guys just looking for some info on the Q45 trottle body swap, What year & model vehicle did they come on?? Also is it a bolt on mod for the redtop sr20det or is there extensive wireing that needs to be done, also does anyone no exactly how much bigger it is then stock?? Thanks a bunch in advance!

I believe the Infinity q45 TB is 90mm(80mm on the inside). I think you can use any year q45 TB that don't have traction control. You need an adapter bracket to bolt it on. You will more than likely need to port match where the TB bolts to the mani. You will have to wire in the tps.

E7-S14: I believe the n/a sr has the larger TB. This mod is probably not worth the hassle unless your making 400+whp!

[Solow240sx]

Well i will be making over 400rwhp i am building a pretty built sr20 red top and figured the throttle body might hold it back alittle since it will have a greddy intake manifold, 264 cams, 740cc injectors, big intercooler & piping, header. Can anyone confirm that the sr20de thottle body is bigger and does it just bolt right up or are there other mods that need to be done..

[luv2spedup]

in

Well i will be making over 400rwhp i am building a pretty built sr20 red top and figured the throttle body might hold it back alittle since it will have a greddy intake manifold, 264 cams, 740cc injectors, big intercooler & piping, header. Can anyone confirm that the sr20de thottle body is bigger and does it just bolt right up or are there other mods that need to be done..

in that case go with a q45 TB, you wanna get one off an early 1990's

[hawk83]

Is wiring in the tps for the q45 pretty straight forward? My harness is not with me right now so i cant look to see how many wires are on their. Same amount of wires?

[playero_loko]

Is wiring in the tps for the q45 pretty straight forward? My harness is not with me right now so i cant look to see how many wires are on their. Same amount of wires?

Havent installed mine yet but the tps for the q45 is going to be needed and i t hink it is a 3 wire one so there shouldnt be that hard.

Well i will be making over 400rwhp i am building a pretty built sr20 red top and figured the throttle body might hold it back alittle since it will have a greddy intake manifold, 264 cams, 740cc injectors, big intercooler & piping, header. Can anyone confirm that the sr20de thottle body is bigger and does it just bolt right up or are there other mods that need to be done..

If you have a greddy manifold be ready to get it ported out and have the flange cut out b/c the openning of the q45 t.b. is 84mm so i'll show what my greddy mani ended looking like once it was all done.

new flange already welded and ported to match the q45 t.b.

side view of it with new flange