Rx7Nub

Hey, I have read alot of things about the TID mod, and I get the main drift, and for my S4 tii, what do I do with the things that are allready in the stock TID, like the factory blow off valave and all those, do I somehow plumb those back into the tid.. or what.. if anyone could help me with this, or direct me to a good write up for my S4 it would be greatly appreciated, thanks

capsoval

Drill, tap, what ever you need to do to put those Items back in there. The blow off valve needs to stay the way it comes factory, (plumbing wise), unless you have an S-AFC. Just do what you can with it.

fastrotaries

If you get an aftermarket BOV then u have the option to not plumb it back, and just vent it to the atmosphere.

dr0x

I think hes looking for a route thats not going to cost him 100$ +

rx7_turbo2

There are 3 things.

Airpump- Disconnect
Blow off valve- Vent to atmosphere use a brass check valve. Or a real BOV
Crankcase Ventalation- Just leave it open vented.

Rx7Nub

I got air pump removed allready, so I won't need that... what is the crankcase ventalation??? and if I open vent the stock bov how will that affect performance???

capsoval

If you don't have an S-AFC or some other piggyback and you vent it to the atmosphere, your car is going to go rich when it vents. With an S-AFC you can eliminate the rich affect.

Gene

iTrader: (1)

Won't that contribute to the exhaust pipe flammage that every RX-7 owner dreams of?

Rx7Nub

So, right now I dont have an S-afc, so should I open vent it or what? What do you guys think my best option is... ? thanks

-Mark

Rx7Nub

can I use a water check valve?? and what is going to happen when my car vents and runs rich? worse gas mileage? is that it? or will it really bog down.. ?

Rx7Nub

bump??

dr0x

Nothing is going to happen. Its the same as using any bov that vents to the atmosphere (but using a check valve + stocker is a little uglier, not as reliable). Youll see some flames (especially since you dont have a cat) between shifts. Its not going to cause you to run rich 100% of the time. When the bov goes off it releases air which was measured by the AFM, so the ecu sends the fuel there for that air. But you suddenly remove the air, so there is all that extra fuel for a few seconds. After a few loud back fires and some flames your car will go back to normal.

Mark'sMazda

Finally I open air vented my blowoff valve for that nice, riceboy
intimidating shift. I didnt like the changes in idle and around town driving
with it left open and idled up. so I went to lowe's and got a plumbing
fixture, 3/4" flapper-door type check valve. The door moves very freely, adn
it is plenty wide enough to flow air. I mounted it on the pass. firewall,
facing upwards. This keep sthe flapper door closed except when pressurized.
I ran some spare ACV silencer hose from it to the blowoff valve itself,
about 9 inches away. IT holds vacuum fine, and sounds killer when boosting
hard. Between it and the TID mod, I can hear teh turbo spool nicely, and
hear it release when I shift. Pretty cool for $10 each mods.Im hoping that
when I get my dual canister catback, this mod will also help me shoot hella
flamage since i have no cats. :-) Oh, and I have also rewired my fuel pump
for constant high voltage.

This was quoted from Kevin Landers, I have seen 3 cars with the DIY bov and all 3 ran fine. The tid mod is very, very easy.

Rx7Nub

I think I will be doing this after I get my fcd put in... thanks for all the input

rx7_turbo2

Wrong

This happens with other cars, not RX-7's

Using a check valve in conjunction with the stock unit is kind off ugly, but no ill affects will occur. Yes and FCD is a good idea.

capsoval

Okay what part about what I said was incorrect. If it is wrong, enlighten me. Don't just say "wrong".

dr0x

How is a s-afc going to stop you from running rich w/ an open vented bov? I mean like you arent going to beable to program it for everytime you shift to reduce fuel for a second. The only way I see to get rid of it is to get a standalone, and eliminate the AFM.

NZConvertible

Yeah it does. It may have a rotary, but the EFI is quite conventional, and it's the EFI that causes that problem.

NZConvertible

The S-AFC has a specific setting for open-vented BOV's that reduces fueling briefly on decell to stop backfires and flames.

gsracer

what's the fun in that?!

V8what?!

Just make your TID, make a route for the stock bypass valve to loop back into the TID (or get a real BOV), and make (only 1 for the S4's I believe) a nipple for a vac. line off of your TID as well. Tuh Duh! Happy Spoolin'

jeff88

Here is a pic of the tid that I made

jeff88

one more