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RB25 Greddy Style Plenum Fitting ?


900ss

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So I can use a greedy style inlet plenum on an RB25

Does the throttle body flange of the plenum deffo need modding to allow the tbh to clear the inner wing? (260z)

Is so anyone got any pics to show what angle it needs re-setting at?

btw, I would offer it up myself but my cars in the body shop without an engine, so not so simple

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WE modify them for more fender inter panel clearance.

Cut off flange and weld on at new angle....

 

Thats what I'm thinkin

If you was a little closer I might just pop in to see whats what

I guess it also depends on what throttle body is used aswell?

Esp as the std housing has those sticky out bits that must get in the way ?

 

btw, your RB engine mount kit fitted a treat

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If you are using a GReddy intake you can have it modified as described OR you can run the large VH45 throttle body with a 45* 3.5" - 3" silicone coupler reducer and it should clear after removing the carbon canister mount from the rights side of the inner fender well.

 

Personally I ran a 3.5" - 3.5" 45* coupler and worked the inner fender well to sufficiently clear the pipe. But I was going for volume in front of the TB.

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you can run the large VH45 throttle body

 

I've had a look at pics of a Q45 throttle body but they look a bit chunky?

So my plan was to use one of those simple smaller aftermarket throttle bodies?

80 or 90mm maybe ?

Not having seen either in the flesh it makes it harder to be sure

But they look a better bet?

Edited by 900ss
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I've had a look at pics of a Q45 throttle body but they look a bit chunky?

So my plan was to use one of those simple smaller aftermarket throttle bodies?

80 or 90mm maybe ?

Not having seen either in the flesh it makes it harder to be sure

But they look a better bet?

 

 

If you do that you may end up with a slightly shorter TB which will help drastically with where that pipe and coupler ends up.

 

Just make sure you get a good TB as I have not heard good things about the cheap China Knock-Offs.

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It gets pretty close to the inner fender but I managed to make it work. I used a 3.5-3" 45 degree coupler as Rayaapp2 described and ran my throttle body sideways, having the cable hidden under the manifold which saved up some room on the side.

Edited by RS Speed
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It gets pretty close to the firewall but I managed to make it work. I used a 3.5-3" 45 degree coupler as Rayaapp2 described and ran my throttle body sideways, having the cable hidden under the manifold which saved up some room on the side.

 

 

likewise here with the sidewayz VH45 TB... RS Speed inspired the idea though in all fairness. It took about 45 minutes to make a cable mount at the correct angle. Its also pretty clean looking this way.

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Cheers for the pics, thats a great help

I see the main water union on that plenum has been welded in aswell

It looks the same as the one I bough from the states (I couldn't find one here at the time)

I went for one that came with the tbh addaptor kit, tho that needs to be machined flat before it can be used

Think mine was cast from a block of wonky cheese tho lol

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  • 1 month later...

Very nice work Mack. If the money is there around tax season, maybe I'll upgrade. Will that work with a NEO as well? Anybody have performance data on the Greddy intake? BTW, I got the intercooler kit to sorta fit for now. I'd prefer to make a trip to Cali someday and have you guys look at it personally to figure out what needs to be modified...

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Just make sure you get a good TB as I have not heard good things about the cheap China Knock-Offs.

 

Well I've gone for one of those cheapies

Looks good and seems to fit well

80mm and bolts straight onto the plenum without need for an addaptor or mods

 

th_80mmtbh1.jpg th_80mmtbh2.jpg

 

Should save some room now ?

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