I would highly recommend that you run a restrictor to the AST.

Why? I made my own AST w/o a restrictor and coolant temp shot up to 285 F degrees within 5 minutes of start up because the coolant flowed through the AST instead of the radiator. The AST was too hot to touch while the radiator end tanks were cool.

Luckily, I was running Evans NPG+ so no harm done. That was over 4 years ago and 25K on 13psi of boost 311 whp (265 ft-lbs torque tuned by Steve Kan June 2008).

 

Am I the only one on earth that cut the flow restrictor out of the OEM AST and expoxied it into my pettit AST.

 

^ How's it holding up though?

 

Kin, I paypal'd you. Let me know the status. Thanks.

 

Call me crazy, but I deleted my AST many years ago and haven't missed it once

 

same here

 

I'm debating on keeping mine or not. It's already a pettit, but if i pull and sell it, it will be like a free 2-step box for me!

 

@KINETIK_FD3S: I'm interested in purchase one og your polished AST, I live in Italy, please PM me how much will it be paying via PayPal, thanks!

 

I made and inserted an aluminum 0.090" restrictor pill in the hose from my Pettit AST to the radiator - same effect...

 

Is KINETIC still making these? My Petit AST is leaking and I cant drive the car till I get a new one.

 

I just bought one from him around Feb. of this year. Paid around $150. I just e-mailed him off this site and he sent me his Pay-Pal address. He will make it with or without the restrictor as discussed above. The workmanship and finish is very good.

 

Sorry to resurect this again, but I'm having the same problem with my pettit AST leaking. KENETIC, your PM's are full, are these still for sale?

 

i got mine from tripoint. it's a quality part:

http://www.tripointengineering.com/p...oducts_id=1049

 

7 months to answer but i just realized you may have asked how my epoxied restrictor is holding up. It is fine, the OEM restrictor is a brass machined part and epoxy withstands higher than boiling point of water.

 

Hey that's awesome and good for you.

 

Yeah, i saw these AST's on display at Mazfest. Very nice and very identical to kinetik's.

 

so in other words, what i can gather from this thread... They're all pretty much the same except for pettit which seem to suck... So which one should i get? What makes one better than the other? And kinda confused bout this restrictor pill stuff, thanks

 

The Fighter's Garage one has worked fine for us. Easy to install and looks good too.