Best AST
11-07-02, 12:58 AM
#27
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Originally posted by Kahren
i ahve the oem shape ast
and here it is
i ahve the oem shape ast
and here it is
This also appears to have the flimsy filler neck which if it does, is this unit prone to cap leaks as well as the pettit one.
11-07-02, 02:14 AM
#31
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Originally posted by GoRacer
Tri-Point also makes one that looks exactly like the Pettit but since your on the east coast, Pettit is cheaper shipping. The ASI sound tight if it's polished. Oh, Mazdaspeed makes one for 3 or 4 times the cost.
Tri-Point also makes one that looks exactly like the Pettit but since your on the east coast, Pettit is cheaper shipping. The ASI sound tight if it's polished. Oh, Mazdaspeed makes one for 3 or 4 times the cost.
11-07-02, 03:01 AM
#34
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Originally posted by Nameless
Someone wrote tripoint's is the same as pettit, it's not true. Tripoint uses stock size caps, not like Pettit.
Someone wrote tripoint's is the same as pettit, it's not true. Tripoint uses stock size caps, not like Pettit.
11-07-02, 04:41 AM
#35
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The shape does serve a purpose. The idea behind the shape is to maximize the area of the fluid surface so it makes it easier for bubbles to escape. Is this a huge deal? IMHO no, but the reason you don't see Pettit using that shape is it'll cost a fortune to make an aluminum mold in that shape versus a simple can.
11-07-02, 09:54 AM
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kwok, if that was the case, they could make a simple square right? I still don't know for sure about the shape having anything to do with it. But a square has more SA than a circle, yes. But what about the skinny bottom part of the OEM? The ASI and Pettit ones are fat the whole way. Even though they are circular, as opposed to square. It would seem to me that there's actually more surface area in those.
11-07-02, 10:07 AM
#37
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Originally posted by Kahren
flimsy? eh, thi sis aluminum, havent had a single leak yet
u must host teh pic to get it to post lieki did
flimsy? eh, thi sis aluminum, havent had a single leak yet
u must host teh pic to get it to post lieki did
11-07-02, 10:45 AM
#38
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Originally posted by Leprechaun
kwok, if that was the case, they could make a simple square right? I still don't know for sure about the shape having anything to do with it. But a square has more SA than a circle, yes.
kwok, if that was the case, they could make a simple square right? I still don't know for sure about the shape having anything to do with it. But a square has more SA than a circle, yes.
11-07-02, 11:35 AM
#39
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Well it is almost a square. Its skinny on the bottom so it won't block the IC too much, then it expands into a flat squarish piece at the top so you have the advantages of both a slim profile in the area where it blocks the IC, yet the advantages of a large surface area for bubbles to escape. Maybe look at the design from the opposite view, why cast a more complex shape than necessary? Its more expensive (slightly), and more work, so there must be a reason.
11-07-02, 12:25 PM
#40
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There _are_ cast aluminium versions of the stock AST. I think Cork-sport and jt-import have them - and you can get one for dirt cheep at
http://www.fc-datalogit.co.nz/ast.html
The shape is supposed to promote air sepeartion, and if you have the PFS IC, you need the stock shape to fit it where PFS put the mounting tab.
I had a tri-point AST before I went with teh delete kit. I found it to be different frpm Pettit in that it was black anodized.
I found that I needed to replace the caps more often than I did with the the stock AST to keep them from dribbling a little bit - why? - I don't know. Maybe something to do with the way the filler neck was built, as some mentioned above.
http://www.fc-datalogit.co.nz/ast.html
The shape is supposed to promote air sepeartion, and if you have the PFS IC, you need the stock shape to fit it where PFS put the mounting tab.
I had a tri-point AST before I went with teh delete kit. I found it to be different frpm Pettit in that it was black anodized.
I found that I needed to replace the caps more often than I did with the the stock AST to keep them from dribbling a little bit - why? - I don't know. Maybe something to do with the way the filler neck was built, as some mentioned above.
11-07-02, 12:51 PM
#43
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The only Mazdaspeed AST I have seen is the one that JT-Imports offers. It costs $330 and looks like the ASI except it has more metal, so it prolly weighs a bit more and is obviously not worth that much money. Corksport doesn't show a pic of theirs, but it's $221. I'd go with the ASI b/c it looks better and performs well, but if you can find a deal on the OEM shape one, it might work too. I dunno, this is the first time I've heard of a stock shape aluminum AST. Just don't do the elimination.
11-07-02, 01:12 PM
#45
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Originally posted by ZeroBanger
where can I get the oem shaped AST? I want it!
where can I get the oem shaped AST? I want it!
) and belive me it is MUCH STRONGER than ANY of the round tincan ASTs on the market.Do a search on for posts by spooledUP7 & AST, there have been at least 2 group buys in the past and he probably could be convinced to do another run.
AST Mounted in my FD3S
Last edited by maxpesce; 11-07-02 at 01:22 PM.
11-07-02, 01:49 PM
#46
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Definately go with the pettit. If it was a waste of space to have an AST it would have probably been eliminated from the stock system and never included to begin with. Plus it kinda gives it a nice look too, not chromed/polished but it looks cool I guess.
11-07-02, 06:29 PM
#48
don't race, don't need to
No, I think the one on the left is the ASI unit. They're saying is has less tendency for the cap to leak over time b/c the neck on the pettit isn't as strong as the billet on the right. Stupid me and my Pettit owning self... next they'll tell me the Fluidyne rediator is a POS, and redline MTL is REALLY BAD fro the maual tranny. Sigh...
11-07-02, 08:21 PM
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Redline MTL is bad for the tranny. Its too thin and research by PFS has revealed it causes the bearings to wear prematurely. It'll make the car shift smoother but at a cost. I talked to another rotary mechanic about this because I am getting some light bearing noise and he confirmed that if I have problems with the synchros MTL will help, but in my case with bearing noise it would make it worse. Some people even go as far as saying not to use ANY synthetic in the tranny, but MTL is noticeably thinner than regular synthetics, he poured some out and the stuff is just a few notches thicker than water.