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  #1  
Old 07-07-2004, 09:05 PM
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exhaust port dimensions?

Has anyone measured the exhaust port dimensions at the exhaust manifold mounting surface? Are the ports round, square, oval? Size?
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  #2  
Old 07-07-2004, 09:12 PM
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I think Todd may have measured the ports on his SVX's engine. I don't believe the shop manuals have any decent pics in them.
-Bill
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  #3  
Old 07-07-2004, 09:17 PM
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PM SVXfiles. He just did an engine & tranny swap on his son's '96 SVX. The old engine should be sitting around and he might be able to measure the ports and take some pics...

-Chike
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  #4  
Old 07-07-2004, 10:59 PM
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As I remember they were 1.5 ", I'll pull the factory headers, and measure. Tom
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  #5  
Old 07-08-2004, 06:54 PM
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1.5" Exhaust port size

Here's the pic I promised. The port is 1-1/2" in diameter. There are more pictures in boxer6's locker. Hope this helps.

BTW, there is also a shot in the locker of the best way to reach the (4) 12mm flywheel to torque converter bolts under the intake manifold after removing the alternator. Tom

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  #6  
Old 07-08-2004, 07:15 PM
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Thumbs up

Thanks Tom. Great pic!

Are the exhaust ports slightly oval shaped or a perfect circle?

-Chike
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  #7  
Old 07-08-2004, 08:52 PM
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this is amazing!!!!! I WAS JUST GOING TO POST THIS Question ...........so the internal dimension of the exhaust manifold is 1.5" ........what about the rest of the SVX's exhaust system?

Also ...anyone know how this 1.5" port size compares to other 6-cylinder engines?

THANKS!
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  #8  
Old 07-08-2004, 11:40 PM
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Mychailo,

What are you up to now?
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  #9  
Old 07-09-2004, 11:30 AM
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Thinking about headers. :-))
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  #10  
Old 07-09-2004, 11:38 AM
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With exhaust ports 1.5" in diameter, would an ideal header size be 1.75" or 2" for maximum flow w/o loss of useful backpressure?

-Chike
Quote:
Originally posted by mbtoloczko
Thinking about headers. :-))
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  #11  
Old 07-09-2004, 11:46 AM
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Re: 1.5" Exhaust port size

Quote:
Originally posted by svxfiles
Here's the pic I promised. The port is 1-1/2" in diameter. There are more pictures in boxer6's locker. Hope this helps.

BTW, there is also a shot in the locker of the best way to reach the (4) 12mm flywheel to torque converter bolts under the intake manifold after removing the alternator. Tom
Hi Tom. Thanks for the pic!

How about intake port dimension?
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1995 Laguna Blue SVX L AWD 5MT (sold)

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SVX Mods: ND iridium spark plugs, Impreza RS fpr, afr tuned to 13.2:1 using a custom MAF bypass, custom exhaust, WRX 5MT w/ STi RA 1st-4th gear & stock WRX 5th gear, Exedy 13 lb flywheel & Sport Clutch, STi Group N tranny & engine mounts, urethane spacers in rear subframe, rear diff mounts, and pitch stopper, SVX Sport Strut Springs (185f/150r), custom 19 mm rear swaybar, urethane swaybar mounts, Rota Torque 17x8", 225/45-17 Proxes 4 tires, Axxis Deluxe Plus organic brake pads.
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  #12  
Old 07-09-2004, 02:41 PM
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Not quite so easy Mychailo

The intake ports are strangely shaped.

Pics w/dimensions in my locker.

Todd
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Last edited by wawazat??; 07-09-2004 at 03:03 PM.
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  #13  
Old 07-09-2004, 03:05 PM
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Quote:
Originally posted by Chiketkd
Are the exhaust ports slightly oval shaped or a perfect circle?

-Chike
Circular port Chike.

Todd
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  #14  
Old 07-09-2004, 03:12 PM
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Thanks!

I see what you mean...those intake ports do have an unusual shape to them.

-Chike
Quote:
Originally posted by wawazat??
Circular port Chike.

Todd
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