Power Gains for a 20v Blacktop

[L0rolla1]

doesnt help i dont speak/read aisan. did he get the off this site?

[Calvin]

doesnt help i dont speak/read aisan. did he get the off this site?

I recommend "Japanese for Dummies"

[20v_rollaboy]

No I didnt get them from that site. I found a BZ-R that was written off and managed to get these off it. Only cost me $100, and i think its well worth it Engine note changes at 3000rpm, and can feel the difference aswell.

And no, I dont have a black-top, have silver-top.

[Matty104]

will putting tubes on each throttlebody with a filter on each do much?, and that will need a new ecu , etc, am i right?

[TRD_ZERO]

Its all debatable what performance gains or losses you will get from putting tubes on the individual throttle bodies. Makes a great sound though. And NO you wont need an aftermarket computer for that.

[bluemaumau]

blacktop wont, silvertop will, or you could wire in a blacktop loom

[Matty104]

what about the map sensor, or what ever it is?, do i need to attach that to anything?, its on a blacktop,, I can make the tubes up at work and flanges, the only thing i will need to buy will be the filters, what length should they be?

[Calvin]

Since you have a blacktop your engine is map sensored and you dont require a Air flow meter (AFM). That means you can do this without changing the standard ecu.

[Bling]

when I tested my blacktop with a "butt dyno" its faster with stock intake in place.

However, open trumpets (with filters) sounds nice! and when you change back you get a nice increase in performance

[RedMist]

when I tested my blacktop with a "butt dyno" its faster with stock intake in place.

However, open trumpets (with filters) sounds nice! and when you change back you get a nice increase in performance

Now thats substancial. I wonder how well calibrated your butt dyno is, as induction roar generally creates substancial butt dyno power. Mr Helmholtz agrees with you, removing the stock airbox removes power.

[Matty104]

so better off to leave the stainless intake with pod, which geta better flow because there is another pipe directing cold air from the groung to the cone of the pod

[TRD_ZERO]

so better off to leave the stainless intake with pod, which geta better flow because there is another pipe directing cold air from the groung to the cone of the pod

Yeah thats right just leave it

[Cakky]

distrb done a back to back dyno with the quad throttle bodie chamber on and with it removed he made 3kw so yeah lol

[johntramp]

What does Hermann von think about a set of longer trumpets like seen on many RWD 4ages?

[Distrb]

distrb done a back to back dyno with the quad throttle bodie chamber on and with it removed he made 3kw so yeah lol

yeah, but i didnt have a stock setup though... so might be a different result for those that do..

[johntramp]

Doing some reading I came across this;

Notice that with invididual throttle bodies (ITB's) you lose this resonance effect because the reflected wave escapes out into the engine bay (or the atmosphere) and is not stored and returned by a plenum/acoustic chamber. ITB's do NOT use ram theory to get that extra kick at peak torque because they usually in race form do not have a plenum. In some street ITB's, a plenum is attached for practical reasons (sound deadening and filtering). They rely on very very large amounts of passive cylinder filling based on the piston's effects and use tuned air horn height and tapered diameter (with an S-shaped velocity stack opening) to get the N/A pressure boost effect

[ROBODISCO_20v]

What does Hermann von think about a set of longer trumpets like seen on many RWD 4ages?

Supposedly the longer the trumpet the lower in the rev range it will increase power & vice versa with shorter ones. I have 40mm ones on my bkl top & it screams from 7 til the cut around 7800. In hind sight i probably should have gone a little longer for street use, but sounds cool when you've overtaking someone in 3rd gear on the open road.
Any thing is better than the factory trumpets in my books. (I still have the factory plenum & intake pipe with a HKS pod filter)

[Matty104]

so robodisco you still have all the factory plenum etc, just changed the rubber trumpets with other ones?[/quote]

[AceSniper]

mines the same airbox, with cold feed runing Imec trumpits

[Matty104]

so just change the rubber ones with strait ones?