Rotary + 4AGE Quad Throttles

[BlindspottNZ]

Ok this probly abit of a wierd question for a toyota forum, but basicly what i want to know is to do with a quad throttle body setup + a 12a turbo engine.

Blacktop 4AGE throttles are 42mm as far as I know. if thats right then x4 that should be enough flow for the power the engine will be making.

What i was going to go with was an Injection Pefection set up, which is basicly a setup for rotaries which uses a plenum followed by two throttle bodies (ie 51mm) with secondary injectors bang on the top of them. I was planning on going with 600cc primarys and 1000cc secondaries. The turbo is gunna be a big T4, most probly a .60/1.06 AR job with a big external gate + all the other stuff. ECU is a LTX-8 with quad coil packs and fuel system is a holley blue + carter + surge tank.

Instead of using the double throttles below the plenum I had the thought tonight about using quad throttles after seeing somone talking about quad throttle bodies from motorbikes on ausrotary.



Im guess it would be possible to fabricate adaptors or runners to go with the toyta throttles but how would i be able to setup the 600cc primaries and the 1000cc secondaries on this setup? putting the primaries on the inside two throttles and the secondaries on the outside two wouldnt work....


what size are the stocko blacktop/silvertop injectors?


Thanks for the help

nic

[BlindspottNZ]

now that i think about it i wouldnt need the secondaries if i had four throttles caus i could run 4 x 800cc injectors instead



anyone seen this setup done before?

any ideas or advice?

[Mr Revhead]

no real idea coz i stay away from those things
but i can tell you the black top TBs are 45mm

[strx7]

I am currently in the process of putting quads into a 13B Semi Bridge Turbo, I am using silver top TB's for the primaries and will be using 55mm TB's for secondaries.

if the 12AT is either std port or only mildy ported they should flow fine.


Good luck and Go hard.
Toyota people are usually pretty understanding in regards to rotaries, I play both sides of the fence and have toyota's and rx7's hehe

[BlindspottNZ]

I am currently in the process of putting quads into a 13B Semi Bridge Turbo, I am using silver top TB's for the primaries and will be using 55mm TB's for secondaries.

how does this work?

so your saying that your secondaries have their own seperate throttles that open up say when your primaries get to 80% duty cycle?

that would be pretty hard to tune wouldnt it? and how would you work the throttle cable?




im gunna get a big extended port eventually

[strx7]

15-20 % of the primarys opening and then the secondaries pick up, same as how the single primary & double secondaries work in the std S4/5/6 throttle bodies.

means you dont get the huge BP pules at idle with the secondaries being closed as its only the secondaries which are BP's the primaries are just large extended port

[BlindspottNZ]

Ah ok i get what you mean by semi bridge now, that sounds like a good idea!

you should post this up on Ausrotary, lot of people would be interested, id love to see how it runs

thanks for the info

[strx7]

people on there have already done semi bridge
Brain Cain from the rx7club and teamfc3s forums was the "founding father' of this kinda set up. it means you get alot of midrange power & torque and the turbo spool up is quickend, due to the extra exhaust pulse of the BP you can get good sized turbo's spooling at low rpm. IE: the set up i was running was a To4 with P trim 1.15a/r divided exhuast side with a 60-1 compressor wheel in a 0.70a/r comp housing. that was on a equal length fully divided manifold with 14 inch runners. at 2000rpm in 2nd gear put ya foot down a bit and instantly the boost guage was above 0.
This new set up I'm going to be using 13BRE cosmo plates which have HUGE intake runners and I am custom fabbing the inlet manifold to taper down in size as it gets closer to the ports, this should aid in intake velocity and also gain more overall HP. I'm going to be making a new exhuast manifold an i'm hoping to get about 105cm runners before the turbo, with the turbo positioned at the LH front of the engine bay, this combined with the inlet manifold should mean I can spool the 1.52 A/r P trim t04 I now have just as easy but without the exhuast back pressure issue i was having above 6500rpm. BP turbo engines are VERY touchy to exhuast manifold pressure.

[BlindspottNZ]

Dude thats gunna be a beast you got any pics?

Havnt heard about tapering down the intake runners before but it would be a good idea if the throttles were oversized for the ports!

What kind of car is this going in?



no vaccum at 2000 rmp is damn good especially with such a huge turbo!! with my highflow t3 my 12a was spooling up probly at 2400 or so

im gunna go have a look on that teamfc3s site cheers dude

[strx7]

its in a series 4.

this is how it was running

http://www.teamfc3s.org/forum/members_c ... &car_id=86

[BlindspottNZ]

Thats a whopper turbo bro tough car

have you got any pics of the quad throttle setup so far?

[strx7]

nah its currently in the process of being converted from pics drawings to 3d actual items. i'm not expecting to have them finished for a couple of months.