O 16581 72452 5

https://www.rx7club.com/forum/showth...hreadid=215541
Nice mod for those of you with extra parts.

ECDA

hey, do us all a favor and stab yourself

O 16581 72452 5

If you don't want to listen to my suggestions and my proven performance idea, then keep your hostile comments to yourself.

MrBob 86

You JB welded the throttle body on?!? Your kidding, right?

O 16581 72452 5

I'm not kidding, it worked out great. We only did this because he had an extra IM, MAF, and TB in his garage and already purchased an S-AFC for future turbocharging, so we decided to put his extra parts to use until then.

1987RX7guy

iTrader: (3)

ok how the heck did you get two intakes on one engine? A little pic would be nice. I don't see it making any more HP than just one intake as long as the intake it has on it is free flowing and has as little restrictions on it as possible.

O 16581 72452 5

I can try getting pictures off of him later, his IM was a long tube with 4 intake tubes leading down with a throttle body on the far end making it hard for air to get to the last cylinder(s). We JB welded the extra throttle body on that end so it evens out airflow to each cylinder. I'm sure it could potentionally make more power on a rotary using say a huge single butterly throttle body as the extra one, The more air it can potentionally suck in, the better, suck through one small straw and suck through two small straws. The two makes it easier.

NZConvertible

This isn't a new idea, and has been used successfully in the past. However in all those cases the extra TB was welded on by a professional, not glued on. I do not expect that TB will stay attached for long...

Don't expect to be able to do this quite so easily to your 13B manifold. The shape and location of the plenum will mean quite a lot of custom fabrication (i.e. welding...) will be required, and at the end of the day it may not flow much more than the stock TB, which is already quite big.

O 16581 72452 5

It's a GSL-SE motor and manifold i should specify, i've never really seen an FC manifold aside from pictures. The JB weld should last, i used it for my ACV blocker plate, it still hasn't even thought of coming off yet.

I know the idea isn't a new concept, but i'm sure the way we did it is.

MIKE-P-28

iTrader: (1)

DUNNO whats funnier that idea, or the comment

gamble302

isnt yer sig a lil too long :P

Evil Aviator

The proper way to do this is to use a custom manifold, smaller throttle bodies, and a standalone EMS. The point of having one throttle body for each rotor (or cylinder) is for fine tuning, not for total flow. Running two huge throttle bodies is just going to kill your acceleration. It's a miracle that your friend's car even works with the MAF's wired together. Please don't ruin your car in the same manner.

Throttle bodies, carburetors, and other engine intake and exhaust orifices are sized for a particular application. If the diameter is too small, the air velocity is very high, which increases drag, and creating what you would call a "restriction". If the diameter is too large, the air velocity is very slow, which reduces inertia. Randomly increasing the diameter of the intake or exhaust does not necessarily increase the engine's performance, and in many cases it reduces the performance. The engine's best performance will be seen with the correct size, not the largest size.

O 16581 72452 5

He used two smaller throttle bodies. Air intake is a newer concept to me, but seemed to work great on his car.

$150FC

Mike O_O are you the guy at the AL club meeting? with the blue turbo fb? your car is badass, yo.

O 16581 72452 5

If this is going to turn into a flame war, forget i mentioned it, it had success in a car and i thought i would share it for people with extra parts laying around. I don't see how using say an intake of only an AFM and cone filter attached to the TBs would one have to worry about losing airflow velocity though, he used the shortest air intake possible on each.

cbrock

iTrader: (1)

I would for sure have a shop weld it on now. The JB is great for patches and small repairs and would even be good for mocking up your intake, however, I would not trust it to hold. A shop should be able to weld that on there for 20 bucks and you never have to worry about it. My buddy tried JB welding bigger intercooler inlets on his DSM sidemount and it held up for about a week and 1 track event and he was broke down in a McDonalds parking lot at 1 am.


The other thing is that the car is only going to suck in the amount of air it needs. Doing what you're doing would be like me putting a demon 1000+ CFM carb on my 307 olds motor, it's going to run like butt and lose power. Plus, how the heck did you guys rig up the throttle linkage? I like the idea of the cylinders getting air from both sides, but I also think that the engineers that designed that system knew what they were doing. Now if he added a turbo/supercharger, nitrous or something, then and only then would I see the need for the extra TB capacity.

O 16581 72452 5

We simply ran a brake cable from a bike across the throttle bodies. Yes, the car is going to suck in the air it needs, but it can potentionally suck in more air this way due to more air being readily available. Like i said, i rode with him and i did feel a power increase in his car. By the way, it would take a tig welder to weld an intake manifold, they're aluminum. I'm not sure where to find a tig welder.

O 16581 72452 5

http://www.capa.com.au/kits_hyundai.htm (scroll to the bottom)

Here's a link i found that has an actual dual throttle body kit for his car with a dyno chart and statistics, For what they charge roughly $500 USD for we did with Roughly $10. So how funny was our idea?

O 16581 72452 5

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O 16581 72452 5

When are plans set for a server upgrade?

1987RX7guy

iTrader: (3)

Ok how does that kit make 47% more power????????????????????????????????????????????? ?????????????????????????????????????????????????? ???????????????????????????????????????????????


Sounds like BS unless that FAST Hyundai has like 20hp stock.

O 16581 72452 5

They only have 88hp stock. It would be false advertisement if they were BSing the statistics.

Cory Simpson

Hey rotary valves give you up to %50 more HP than your stock one's (on a piston engine that is).

So maybe it's possible that it gives you %47 more HP.


Ohhh wait......... No it's not!!!!!

O 16581 72452 5

I'm glad i didn't buy an FC, i don't want to be part of this cocky group of people.

Cory Simpson

You should talk to most of the FD people!!!

And were not cocky, it just doesn't seem practical.