I want this plenum... anyone know who made it?

[sergechronos]

If you guys want a bigger throttle body to run with your upgraded manifolds check out an aftermarket 2G one. I knew they were bolt-on for the longest time but never picked one up. The 2nd gen DSMs share all of the same sensors so it's a direct swap. I bought a 70mm ID S90 throttle body which will be fine for the majority of aftermarket FMICs. They use a 2.75" intercooler pipe. When I upgrade to a bigger intake manifold I'll get a 75mm ID throttle body for 3" intercooler piping. No sense in going bigger than the pipes.



Fits the stock intake manifold and the throttle plate even clears the small stock opening.




VD numbers can be compared against stock, S90 bolted on, S90 with the inlet lip ported, and maybe with it extrude honed. What I like about it is the provisions for the stock TPS, IAC, and even a BISS screw. It should give a stock like idle and throttle response. The only thing missing is a dashpot but the throttle plate may not slam shut too hard. If you guys want to use a DSM throttle body with an aftermarket intake manifold you'll need a flange to weld on. The Evo 8/9 is a 71mm ID which would work well for 2.75" intercooler piping. It would have to be ported out for a bigger throttle body. Xcessive offers the Evo flange.

Online Store - Xcessive Manufacturing

Perhaps I am a bit daft, or on too much sinus medicine, but what separates the 1g from 2g throttle bodies in the aftermarket, and by that extension, the DSM throttle bodys from later model Evo throttle bodies?

I know the 1g DSMs have different sensors than we do, but would an aftermarket throttle body specify between the two (or I guess 3 including the Evo)?

[TurboSinceBirth]

Well..thanks for posting that. Never knew there was an upgraded tb bolt on available for our cars which retain sensors and all. Definitely makes the intake manifold swap more tempting now...

I figured it was more common knowledge but maybe not. I had read about DSM guys swapping non-turbo and turbo 3000gt throttle bodies onto their cars for upgrades. Awhile back I had almost wanted to get an Evo 8/9 throttle body but then you'd need at least one if not both of their sensors. The bolt pattern is identical which is nice and gives us some more aftermarket options.

The problem with the Q45 throttle body using the Nissan sensors and mainly from the size of it is your TPS sensor has roughly 30-35% less resolution at lower inputs which makes low throttle and parking lot driving difficult. People that have driven with it know what I'm talking about. I assume something similar happens when you get to a 3" or bigger throttle body but I won't cross that path until my intercooler piping is at least that size, the aftermarket intake manifold is built to suit it, and I have a big enough turbo setup that would utilize it.

Now we just need someone to bolt one of these Xcessive intake manifolds on real quick.

[TurboSinceBirth]

Perhaps I am a bit daft, or on too much sinus medicine, but what separates the 1g from 2g throttle bodies in the aftermarket, and by that extension, the DSM throttle bodys from later model Evo throttle bodies?

I know the 1g DSMs have different sensors than we do, but would an aftermarket throttle body specify between the two (or I guess 3 including the Evo)?

The sensors look to be the same on the 1G. I know there's a slight difference in size of the throttle body. The 1Gs have an idle position switch but the 2Gs don't and neither do our cars. Any aftermarket 91-99 DSM throttle body seems to work for our cars. I haven't seen any aftermarket ones with that idle switch provision.

The Evo throttle bodies bolt on to our cars but the sensors themselves aren't plug-n-play. The TPS and IAC plugs are smaller in size and the sensors themselves supposed have a different footprint so that you can't swap our sensors in. You'd have to clip off the wiring harness for those two sensors and wire it into ours. That's why sticking with a 91-99 aftermarket throttle body will work fine without modifying anything. If you find an Evo throttle body you can't do without you can make it work with minimal effort. DSMs have a much bigger aftermarket than us so it doesn't seem to be a problem.

[Disrupter]

The sensors look to be the same on the 1G. I know there's a slight difference in size of the throttle body. The 1Gs have an idle position switch but the 2Gs don't and neither do our cars. Any aftermarket 91-99 DSM throttle body seems to work for our cars. I haven't seen any aftermarket ones with that idle switch provision.

The Evo throttle bodies bolt on to our cars but the sensors themselves aren't plug-n-play. The TPS and IAC plugs are smaller in size and the sensors themselves supposed have a different footprint so that you can't swap our sensors in. You'd have to clip off the wiring harness for those two sensors and wire it into ours. That's why sticking with a 91-99 aftermarket throttle body will work fine without modifying anything. If you find an Evo throttle body you can't do without you can make it work with minimal effort. DSMs have a much bigger aftermarket than us so it doesn't seem to be a problem.

Whats the part number for that s90? Also for those interested in the s90 be careful because there are knock off's out there as well.

[TurboSinceBirth]

whats the part number for that s90? Also for those interested in the s90 be careful because there are knock off's out there as well.

s90-mits-evo1-3-70

[TUFFTR]

Does it have a proper idle bypass screw or is it a primitive system like the other billet ones?

[NOMIEZVR4]

Found it on 3sng.org

Thats an interesting one...super short runners and rear plugs accessible too..plus it clears the rear vc...?

[TurboSinceBirth]

Does it have a proper idle bypass screw or is it a primitive system like the other billet ones?

It looks very close to how the stock one functions but in a slightly different location. I don't foresee any issues with it. DSMers never had any problems.

[fastfalcon94]

Extreme psi's site has more pics of it. I actually had one once that came on a dsm I parted out. I'm using 3" ID IC piping. That would mean I'd want a 76.2mm TB to match. A ~75mm TB wouldn't be that far off. The Q45 is 83mm ID which seems like 7mm too big, but when you subtract the area of the TB shaft it is probably the best size to go with as far as IC pipe matching.


EXTREME PSI : Your #1 Source for In Stock Performance Parts

[Quarter485]

Bump from the dead. Nomie, any info on that intake in the yellow car or the setup? It looks almost perfect.