This is commonly called the 'throttle body mod', in which the vacuum operated plates are removed comletely, and the holes are tapped/plugged. When most people mention wiring ports, they are talking about the auxilary 5th and 6th ports that open at 3800rpm (and, considering that the vacuum operated throttle plates are only closed under vacuum and are spring loaded to stay open, there's not much sense in wiring them when you can just cap the line that runs to them) But regardless, I believe that is what he assumed you were talking about.

 

hey guys, i got my blow off valve on yesterday and everything works perfectly, no belt slippage at all. The valve blows off perfectly how i wanted it to, stays closed durning idle and cruising and only blows off at shifts above 3000rpm and when i am down shifting. If it is in neutral and i rev it up to like 5000rpm and let off it is very loud. it sounds great. I will get some pics of it on, also on the camera i use i can make a 15 second movie on a single floppy disk. Is there any way i could get it loaded on this site or hosted by someone. I would take a short movie so you all can here how it sounds and see the s/c in action.
sorry i dont have much time, I am not trying to blue ball you guys or anything i just dont have much time to get on
let me know about the movie thing
gotta go bell rang

 

I thought the 5/6 ports on the S4 were default closed? This would mean if you just caped the line they would stay CLOSED, very bad for performance.

 

You ******* own all Zbrown. Would love pics of your new setup and movie would be great, i will keep checking

 

Hell yeah, if that camera of yours can take movies get one of it running and revving a few times. Sound would be a HUGE plus.

 

I can host just about anything. Email it to me, rat@sonicrat.org

 

I was refering to the secondary vacuum controlled throttle plates, on the throttle body.

 

oh, hehe. Sorry. i thought you were saying you didn't see why people wire the 5/6 ports open when you can just plug the vac line.

 

So how was nitrous a better bang for the buck again? Doesn't everything else also apply to it too? You're right HE paid $300. I could personally do it for that much or cheaper too. I do have T-II injectors lying around. I even have an entire spare T-II drivetrain sitting here. I can weld. I do have access to free materials. I also have a built car and don't need to do this though. You don't HAVE to do anything you mentioned to get a GAIN. You have to though to get a BIG gain. I won't deny that. Show me one intake or exhaust that will give you such an improvement for that little amount of money. Even a small amount of nitrous will be fine. Yes it is an eBay transaction. He may have actually gotten it cheaper or he could have gotten screwed over. It can happen. Invalid excuse. He didn't!

It still stands that this IS the best bang for the buck. Everything else is an excuse. Like I said, no one denies that there aren't ways to improve this for more money. He has been more inspiration than we have seen from any others here in a long time. If he listed to all the excuse makers so called logic, he probably wouldn't have anything done to his car at all right now and he also wouldn't have anything original.

Way to go Zbrown! Keep the pictures and hopefully a video coming.

 

yea , a vid would be sweet

 

This and a turbo can be done for the same price, so they're both about equal

 

heres some pics of the blowoff valve, i am sending the short clip to SonicRat so he can post it. not the best quality sorry

 

here is another, Ill try to get a better movie to
zac

 

I still don't get why your running two BOV's...?

Or am I missing something very obvious.......

 

Hes running a bypass valve to recycle the excess air back into the intake but it doesnt relieve enough of the pressure, hence the Blow off Valve.

 

i wonder if it is even remotly possible to supercharge a turbo....they said you couldnt super charge an NA......hmmmm

 

Who said "You can't supercharge an N/A."??

 

The morons.

 

somebody get zbrown a computer for the love of god I can't stand the suspense of waiting for his replies every day!

 

Sorry it took so long, was out running 1/4 miles with the GTUs, here is his video.

http://www.sonicrat.org/na-sc.mpg

 

sweet

 

That video is better than **** of young young girls.

 

omg that is intense. you are so rad. you have given hope to anyone who ever owns a n/a rx-7. write up is definately needed. very detailed. so the most simple minded when it comes to cars (me) can do it.

 

well it's simple as like a bolt on i'll say from lookin at it.. just have to know some basic mechanic to work around the car. what i need it that bracket, and mounts..
parts in mind would be right for this setup:
turbo II fuel pump
turbo 550cc injectors
turbo II fuel rail need or could work around with aftermarket fuel regulator anyways
s-afc

 

Sort of. Both pairs of throttles in each bore are technically "secondary" throttles, because they control the secondary ports. Mazda refer to the upsteam pair as the #2 secondary throttles, and these are removed as part of the TB mod. The primary throttle (the single one that opens first) controls the primary ports.