v6mike

hey
i have a 13b running stock twin turbos
front mount intercooler
catback exhaust system
induction kit
& Apexi PFC

i hear mixed rumors about the AST tank

some people say you have to have it on the car

some other people say you can bypass it & remove it

can anyone shed some light on this for me please??

any commments would be much appreciated
thanks

apexhittinbull

iTrader: (21)

if the radiator is mounted in angle, such as in Mazda Stock FDs, yes you do.

if you have front mount and radiator is vertically mounted, AST is not required thus can be bypassed.

gracer7-rx7

iTrader: (16)

There is at least one link in the FAQ thread stickied in this forum that will answer your question. Check it out.

DaveW

And that link will likely say you CAN get away w/o an AST. It is just a little harder to bleed air from the cooling system than it is with an AST.

Sgtblue

iTrader: (16)

^Agreed. And if you get one of these it makes it easier when you change coolant ---> http://www.amazon.com/LISLE-TOOLS-24.../dp/B001A4EAV0

badddrx7

iTrader: (7)

AST is NOT needed. Very old study done long ago.




Later

v6mike

thanks lads
can anyone enlighten me on how to bypass it?
dont worry i do know my engines haha

Sgtblue

iTrader: (16)

From the stickys
http://www.rx7.org/Robinette/coolant_tank.htm

Supernaut

iTrader: (83)

How do you use that funnel? Do you just put it in the neck, pour some coolant in, start the car and let the air bubble out? That always seemed so dangerous to me.

JHew84

iTrader: (9)

Dangerous? I've done it (using the lisle kit) at least two dozen times on my FD alone, not sure how many if I include other vehicles, don't know what I did before I was pointed to this wonderful tool!

It works so seamlessly, and you've bled the air out of the system before you even realize it, by far one of my top 5 best tool investments EVER, right along side my k-tool hose clamp tool.

Supernaut

iTrader: (83)

Doesnt the hot coolant over flow ALOT and just spill over the funnel?

DaveW

That's the difference with this funnel - it seals to the filler neck, and, unless you get the engine boiling hot, there is more than enough volume in the funnel to avoid that.

Dave

JHew84

iTrader: (9)

what he said, out of the many times I've used this funnel I have yet to have that even come close to happening. The worst that has happened to me was the engine rocking to much while starting and sloshing some coolant around, which really isn't the funnels fault :tonque.

v6mike

cheers fella this helps alot