Monsterbox

iTrader: (6)

Does anyone know of a thermostat neck flange that's available? I'm trying to build a straight pipe w a fill cap but I can only find these with built in ast tanks. Do the s5 aluminum pipes fit the fd?

Thanks!

fendamonky

iTrader: (6)

I'm trying to figure out exactly what you're asking for... (but then again, I just had a bunch of caffiene, so I may be running on 'tard mode )

Are you looking for an oem filler neck, or an aftermarket one? If you're looking for OEM I could sell you my old one, as I'm running a modified filler neck/ast combo..

The s5 filler necks do fit the FD, they are used by people who want to delete the AST.

Monsterbox

iTrader: (6)

Lol, I'm talking about the entire piece. Exactly like your modified ast piece minus the ast! I guess you could call it the thermostat housing. I currently have the oem fd piece with the fc filler neck. I'm looking for a housing flange to make my own housing.

The fd housing appears too tall to clear the hood on the 20b when moved forward. Thinking a straight pipe with a filler neck welded on would be great.

fendamonky

iTrader: (6)

Ah! I gotcha. I'd have to ask Brian where he got the mounting flange he used for mine.

Mine for comparison sake:

And the flange you want (with a good reason NOT to use cheap AN fittings ):

Monsterbox

iTrader: (6)

Dude, that's exactly what I'm looking for minus the bottle.

fendamonky

iTrader: (6)

Apparently Brian just fabricated mine out of some metal stock, so I can't give you a quick and easy source

Maybe just give your fabricator the stock neck to take measurements from and he/she can fab you one to match the stock dimensions.

Monsterbox

iTrader: (6)

Well I appreciate the help. If the S5 3 bolt neck is the same, then I could chop off the flange from an aluminum version neck. Just need to confirm the bolt pattern.

DaleClark

iTrader: (55)

I don't believe there's a pre-made flange anywhere. The S5 neck stock is plastic, I know aluminum ones are sold but I think they're aftermarket. I'm not sure where they are available from or how much they run.

Also, the '86-88 S4 RX-7 ran an aluminum water neck but it's a 2-bolt flange, not even close.

Dale

estevan62274

iTrader: (32)

Here you go...


FD3S Thermostat Flange/Outlet - Turblown Engineering

04G35S

iTrader: (10)

99.00 seem a bit over priced IMO.
You could make one for maybe 30.00

estevan62274

iTrader: (32)

OK,
Was just providing Monsterbox a source.

Monsterbox

iTrader: (6)

Thanks Dale,

Do you know if the 3 bolt pattern of the S5 flange is the same as the FD? If so I'm going to purcahse an aluminum S5 and have welded a radiator filler cap.

Monsterbox

iTrader: (6)

Spot on, thanks alot. Price is high, but it is billet aluminum and prob at least an hour of time to fab. I may try to use a cheaper s5 aluminum neck if possible, but this is the option.

KNONFS

iTrader: (14)

I want to say that Pro-Jay sells a thermostat cap conversion to NPT for the 3rd gen, but cant find it on ttheir page. Here's a link to what I am talking about:

Mazda RX7 Thermostat Removal / Hex Style / Water Pump Adapter Flange

Pirate Rabbit

iTrader: (1)

Fendamonky (or anyone else who knows) is there a certain height to weld the AST to the neck? Like should there be 2" above the neck so the neck doesn't suck in air? I just don't want to get mine too high or low..

Banzai-Racing

iTrader: (11)

We have them being laser cut now, be available in a week or two.

Just like the one in this picture 1/2" aluminum, 1.5" ID

We have a 1.75" ID in stock but you would then need to weld on a reducer down to 1.5" if you are planning on using the factory diameter hoses/radiator.

04G35S

iTrader: (10)

^ OoOoOo I may need to get one of those! Hopefully thats not going to be 99.00! :-)

Banzai-Racing

iTrader: (11)

$40.00 + shipping

04G35S

iTrader: (10)

I will need to pick one of these up for sure!

Anyone with feedback on where to weld this on to the overflow?

Banzai-Racing

iTrader: (11)

I used a Moroso 1.5" dia. filler, cut and welded it on

Monsterbox

iTrader: (6)

coincidentally, I just ordered an s5 aluminum neck and this Moroso pipe, planning to cut and have weld exactly like you Wish I knew about the laser cut flange earlier on.

Thanks

Banzai-Racing

iTrader: (11)

That was a mistake, since the S5 is not remotely the same bolt pattern

04G35S

iTrader: (10)

That looks awesome... Why didnt they do this from the factory? The surge tank setup is just cluttered!

Monsterbox

iTrader: (6)

Cool, keep us posted when yours in 1.5" is available

Banzai-Racing

iTrader: (11)

1.5" ID Flange now available 13B-REW Thermostat Housing Flange