Exhaust port size
Posted: Thu Jan 08, 2004 10:50 pm
Can anyone confirm the size of the exhaust port on a standard Starion SOHC head?
TIA.
TIA.
Exhaust port - 37mm diameter
Intake port - 36mm diameter
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Posted: Fri Jan 09, 2004 11:04 am
Posted: Fri Jan 09, 2004 11:07 am
ahhhh cooks it's nice to see your blue furry face around again 
Posted: Fri Jan 09, 2004 5:12 pm
Can't argue with that. :)
Posted: Fri Jan 09, 2004 6:03 pm
Get the grinder out nxtime :)
Posted: Sat Jan 10, 2004 4:36 pm
cookie just a quick question. what would be a good starting size with both, or is it more about direction of flow that makes the power when porting a head.
Cause I was in me cus work shop on day an he was just ripen into this head that was off an old inline 6 an it semed like he was taken about 4-6mm out of the diameter just look to big but I aint got no idea.
Cheers Rassy............
________
Weed vaporizer
Cause I was in me cus work shop on day an he was just ripen into this head that was off an old inline 6 an it semed like he was taken about 4-6mm out of the diameter just look to big but I aint got no idea.
Cheers Rassy............
________
Weed vaporizer
Posted: Sat Jan 10, 2004 11:18 pm
Im not an expert on head porting. I just went out and measured what the standard port sizes are for NXTIME.
Neverless I would say there would be to it then just 'ripping into it' with a grinder.
Neverless I would say there would be to it then just 'ripping into it' with a grinder.
Posted: Sun Jan 11, 2004 2:20 pm
Thanks, Cookie. Looks like I might be needed a bit more port work.
Posted: Mon Jan 12, 2004 12:24 am
alot to it. my inlets are opened to 38mm and done wery well. I didnt pay to get it done as its a used motor, that somone befor me payed big dollers for.
The ports are now totally round, but not all the port wall was touched.
Ezhaust? I didnt measure or really look last time I had the manifold off, was putting the motor in and not to interested in specs. But its coming off sooon, so I'll measure then
The ports are now totally round, but not all the port wall was touched.
Ezhaust? I didnt measure or really look last time I had the manifold off, was putting the motor in and not to interested in specs. But its coming off sooon, so I'll measure then
Posted: Thu Feb 19, 2004 9:36 pm
G'day everyone,
port size, diameter, shape, direction, dynamic and volmetric efficiancy are all part of a very complicated subject. if you guys want to get into the nitty gritty of it i've plenty of time and will answer any questions i can (just don't want to get to geeky on every body without invitation)
BTW, www.beyondthelimit.com.au is the site of a Melbourne based guy that is excellent! he is very reputable and does excellent work (Glenjo will back me up here for sure)
take it easy lady & gents
port size, diameter, shape, direction, dynamic and volmetric efficiancy are all part of a very complicated subject. if you guys want to get into the nitty gritty of it i've plenty of time and will answer any questions i can (just don't want to get to geeky on every body without invitation)
BTW, www.beyondthelimit.com.au is the site of a Melbourne based guy that is excellent! he is very reputable and does excellent work (Glenjo will back me up here for sure)
take it easy lady & gents
Posted: Thu Feb 19, 2004 10:57 pm
if your game you could try some simple porting yourself i've tinkered arround a bit on a mates 5l head and we made some good gains, it's normal for exhaust ports to be ground out a fair bit most factory heads anren't port matched to the manifold opening (or was it the other way round 
)
anyway check out this site if you're curious it helped me.
http://www.sa-motorsports.com/diyport.htm
it's trying to plug their products a bit but the photos are good and the concepts are spot on.
) anyway check out this site if you're curious it helped me.
http://www.sa-motorsports.com/diyport.htm
it's trying to plug their products a bit but the photos are good and the concepts are spot on.
Posted: Fri Feb 20, 2004 2:59 pm
Backed.Glynn wrote:BTW, www.beyondthelimit.com.au is the site of a Melbourne based guy that is excellent! he is very reputable and does excellent work (Glenjo will back me up here for sure)