Eps big bore TB's

Loges

Agreed. Plus tunes, supporting mods, and dynos all differ. But I'm curious to see how much somebody can squeeze out of these with all of the proper pieces in place (ported upper and lower intakes and a good CAI).

I plan to start down this road after I get tuned first. I currently have everything in my signature without any tuning. So I don't want to push things into the danger zone. I'd rather play it safe and tune twice.

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juicinjake

id also like to make it clear that EPS has a pending DESIGN AND UTILITY patent filed for these plates. Nisformance has a pending patent on their adapter harness. we teamed up to provide this kit to the community and intend to jointly defend it. anyone who is thinking about making/selling plates that bolt 70 or 75mm throttle bodies to these engines, or an adapter harness for this purpose, will in fact, be in violation of either one, or both, patents when they are finally approved. do this, and i guarantee that you will be seeing at least one of us, and our lawyers, in court.

juicinjake

as far as those of you asking for dynos... Z1 has done several cars with these throttle bodies already... RT Tuning just finished their highest hp stock cam car ever, using these throttle bodies in combination with the admin tuning 3" longtube intakes. CZP now has a kit and is using it on their in house 370z shop car, so expect results from them soon as well. the dynos have been done. they are available. these throttle bodies make power and give radically more throttle response than ported stock throttle bodies and radical tuning could ever begin to touch. thats all there is to it.

juicinjake

as far as why we didn't use a 75mm throttle body for the base kit. simple... we tested it, religiously. if tapering down to a stock bore behind it, (and lets be honest, thats most of you), there is no appreciable advantage to the 75 over the 70, especially considering the loss in throttle resolution, and added difficulty in attaining idle stability (particularly on HR cars that dont have the ability to shrink the cams and limit airflow at idle)... combined with an even more difficult packaging nightmare. while i can assure you all that there is a 75mm throttle body based product coming from eps, it will more than likely not be designed with the intention of bolting it to a stock plastic manifold, even if it CAN. hogging out the inlets of the plastic manifold to 4" and putting twin chevy 102mm tbs on it isnt the future of na vhr performance. YOUVE GOTTA CHANGE THE SHAPE/FLOW CAPACITY OF THE RUNNERS! our focus is on bringing you guys the right products that actually work, and have been documented to work, not stuff that sounds cool but doesnt do anything.

Loges

👍🏻 so do you know if EPS plans to do an upper and lower intake manifold that will work in combination with the 70mm TB's? Also, I'm not looking to rip anybody off, improperly install/tune a product that I don't know enough about, or bad mouth a product that again I don't know enough about. I, like many others, just want more performance from my Z. That being said, I know my CAI is a good match for these TB's (TB = 70mm = AAM CAI piping = 2.75") but I don't want to choke the rest of the system with the OEM upper/lower intake plenums. So if EPS isn't planning on making a kit for all of these to work together, then what would you recommend? I plan to do EcuTek as well, so that should make things a little easier for my tuner (probably going to be Dynosty, but nothing has been communicated and confirmed yet).

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MOTORDYNE // AAM COMPETITION // KW // SPL // STILLEN // FUJIMURA // POWERTRIX // DYNOSTY // ECUTEK // WORK EMOTION CR2P // Z1 MOTORSPORTS // ZSPEED // EIBACH // DEWLA DEZIGN // SETRAB // TOP SECRET // TOMMYKAIRA // AEROWORKZ // SHINE AUTO PROJECT

socce

Anyone able to answer this question as to what upper/lower intake plenums go best with these TB's.

RadioFlyer

Has anybody run these with a supercharger?

Elmo370z

bullitt ran these on his 900whp 370z, Ask him about his thought about the Tb's

RadioFlyer

Was it turbo'd or supercharged? Did they work well?

Elmo370z

Its was turbo, no supercharged Z even come close to that power

RadioFlyer

Right, my question was about it being run on a supercharger, but that's beside the point.

I can theorize about what relieving a restriction between a compressor and intake manifold would do under positive pressure, but wanted to ask if anyone has any firsthand experience. Thanks, just curious.

andy_meng1024

There are two guys with 80mm TB with Stillen supercharger locally, both claim faster response but no dyno yet.


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Current: 2015 C200 / 2018 Cayenne / 2012 370z / 2012 C250 Coupe
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bullitt5897

I am running the true 70mm EPS throttle body setup. The units really helped with throttle response. They cleaned up my power curve and attributed to my new power gains. This is a quality upgrade and I highly recommend those going boosted get a set. Not only that but NA guys can really benefit from these throttle bodies.

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Shop Cars: 2013 318whp Nismo VspecII 370z *SOLD*, 2009 1000hp+ 93oct 4.0L TT 370z Fast Intentions STAGE 4 #054

RadioFlyer

Cool, thanks for your input! And based on the previous post, if someone has these on a Stillen Supercharged car, then they fit on the Stillen intake manifold (where they are mounted side by side). Good to know, thanks! I'll keep these on my radar.

BOLIO 671

Anyone with the Stillen Supercharger Manifold able to confirm this? Previous post shows that Stillen Supercharged guys were running 80mm TBs...

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