removing theexhaust inserts
06-15-07, 01:43 AM
#2
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https://www.rx7club.com/general-rotary-tech-support-11/need-help-removing-exhaust-port-sleeves-661416/
read my post there. they are easy to get out, just takes time.
read my post there. they are easy to get out, just takes time.
06-15-07, 09:32 AM
#4
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Mazda put them there as heat shields.
Without them you may get more exhaust heat into the housing & water jacket.
I don't know if it's enough to be a problem.
My guess is, if your cooling system can handle it - no worries.
My port job was pretty mild, so I left them in.
Without them you may get more exhaust heat into the housing & water jacket.
I don't know if it's enough to be a problem.
My guess is, if your cooling system can handle it - no worries.
My port job was pretty mild, so I left them in.
Last edited by SureShot; 06-15-07 at 09:40 AM.
06-15-07, 11:25 AM
#7
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I'm taking my NA ones out and putting in TII ones.... It'll save me a bit of grinding...
Edit: the screw/slide hammer method hasn't worked for me yet. Always strips the threads on the screw and never graps the roll pin. Was going to try and weld the screw to the rollpin, but I hate welding that close to the alum. I don't want to damage anything.
Edit: the screw/slide hammer method hasn't worked for me yet. Always strips the threads on the screw and never graps the roll pin. Was going to try and weld the screw to the rollpin, but I hate welding that close to the alum. I don't want to damage anything.
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06-15-07, 03:10 PM
#8
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I don't recall how big the hole in the roll pin is, or what's behind it.
Is it big enough to drill through to the other side, then use that hole as a pilot to drill from the other side to the pin & drive it out?
Just a thought..
-Bill
Is it big enough to drill through to the other side, then use that hole as a pilot to drill from the other side to the pin & drive it out?
Just a thought..
-Bill
06-15-07, 07:05 PM
#11
rotorhead
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ok so what i originally did is i ported the exhaust really big with the insert out cuz i wanted to go a little bigger well i am hearing that my motor wont last very long if i leave them out????? now has anyone out there experimented with this????
06-15-07, 07:09 PM
#12
I wish I was driving!
Leaving the sleeves out is for high rpm Periphereal Ports and Massive bridgeports. Removing the sleeves leaves a port outlet size of a hair under 2.5". For turbo cars, you want to keep the outlet to around 2", as exists with the stock sleeves, in order to keep exhaust gas velocity high to aid in spooling the turbocharger.
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Erosangel
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