So if you port them (on the manifold) are they still smaller? than on the block
Standard Manifold Porting with pictures and explaination
- Thread starter TurboDave
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- 3rd runner exhaust restriction
So if you port them (on the manifold) are they still smaller? than on the block
No there slightly bigger to start with, and you will find it's like that on any car be it turbo or n/a.
I think I see where your going with this.... The restriction is further down the runner the collector is also restrictive as toyota didnt bother removing any of the cast where the molds joined
I think I see where your going with this.... The restriction is further down the runner the collector is also restrictive as toyota didnt bother removing any of the cast where the molds joined
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My standard mani has a few inches crack on it near the 3rd cylinder, the crack is absolutely massive, the crack occurred on a 98 Glanza with 62K Miles on the Clock - so they're not as good as you might think - at least on my car!
pilgrim_fgau
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62k? My stainless one cracked in about 1k miles max, so to me the cast one done rightly to last 62 times longer than a stainless one.
12345678
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with the right tools you can
wasnt ported as well as you think it was then
what he said, its laughable that people are prepared to spend so much on an aftermarket mani which has a much shorter lifespan and often which are poorly made
So you're saying that a Zisco Mild Steel will be worse than a Standard Mani? Stainless Steel Does crack pretty often indeed - because of the vibration! Mild Steel however would be much better than the stainless - in my opinion.
Well if it's cracked with 1K max - then ask for a Full Refund and get another manifold!
12345678
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i didnt say that, please read the post again. i said "aftermarket mani's have a much shorter lifespan and often they are poorly made"
mild steel or satinless, neither of them seem to be as durable as cast
pilgrim_fgau
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I did, and got a ported mani and on 6 runs on the same dyno as when I had the s/s, it made on average in and around the same power and torque... so to me, stainless are no better than a ported mani... but can cost 4 times more than a ported mani. Take for example, the compact ct9 manis on uksc... over £300, crazy money for no or little gains over a ported mani. Would rather put that £300+ towards a nice ECU or the likes
I'm not saying no one should buy aftermarket mani, I'm just saying I personally don't think that justify themselves for their price.
OK. Have you tried comparing on a dyno a standard one to Zisco for example?
12345678
Member +
one of the fela's who had one of the ones i ported did. ported mani was -3 bhp and +8lb/ft in comparison. if the member in question or any of the other fella's running my mani's would like to comment please feel free.
It's always your choice mate!
If you want it cheap - then no question go for a ported standard mani and make sure you put brand new toyota gaskets when replacing the mani!
If you want the mani to look good and add extra to your mod list, and possibly a few extra BHP then I would go for a Zisco or a WEPR mild steel manifold - but that would cost you some money!
dark_knight
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closed
closing thread..
closing thread..
akyakapotter
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Porting standard mani
Hi all just a quick one dose anybody have a guide on doing this and what cutter to by as I don't wanna take to much off thanks in advance nick
Hi all just a quick one dose anybody have a guide on doing this and what cutter to by as I don't wanna take to much off thanks in advance nick
