Engine porting
#11
Originally Posted by Fd3BOOST' date='Oct 22 2002, 10:56 PM
Also Rob informed me that you should be cautious how wide the ports get. The widerthey are you really risk the apex seal bowing into the port and breaking themselves. Also my stock apex seals are ok,but I am pretty sure I am gonna go with a 1 or 2 piecs seal instead of the stock 3. I may even spring for the 3 mm seals and milling to the rotors because I don't want to do anything to my car for at least a year and a half after this is completed.
#12
Originally Posted by yayer' date='Oct 23 2002, 10:37 AM
ok, since nobody is replying to this i'm gonna ask a bunch of stupid questions, cuz i don't know much about all this milling and porting stuff. what does all of this do and how ? wait.. that was one question, but i'm curious. also, do these 3mm seals make your engine last longer? if so, why doesn't everyone do it? ok theres three
When using 3 mm apex seals on a rotor made for 2 mm seals you have to cut the apex seal groove so the wider seals will fit. This is done on a milling machine. 3 mm seals are usually more durable, but they don't seal quite as well as 2 mm seals. I like my 3 mm seals.
#14
Originally Posted by yayer' date='Oct 23 2002, 12:53 PM
do they make more durable 2 mm seals than the stock ones? do these make the life of the engine longer?
#15
I spoke to Peter today about this. He says that mazda's stock 2mm apex seal is the best one there is. . Ray his head tech runs 643 rwhp on stock 2mm apex seals and hasn't broke one yet.He and Peter both swear by them. Since mine are fine, I checked them on a straight edge to make sure that they are not bowed out. I will just reuse them. He also told me that on any reman they stock apex seals are always reused and only get replaced if they are not up to spec. So they are not replaced just for the sport of it. If ya catch my drift.
#16
Originally Posted by yayer' date='Oct 23 2002, 09:37 AM
ok, since nobody is replying to this i'm gonna ask a bunch of stupid questions, cuz i don't know much about all this milling and porting stuff. what does all of this do and how ? wait.. that was one question, but i'm curious. also, do these 3mm seals make your engine last longer? if so, why doesn't everyone do it? ok theres three
Street port
Bridge port
Periphial port
The street port is the most common. This basically involves opening up the in take a little on the top and botom. This is done by cutting away the alluminum by hand using a pnuematic rotary tool and a few Carbide burrs.
I learned that is is uncommon and unnecessary to open the exhaust ports any on a street car i.e. on stock turbos. Otherwise you will get boost creep most likely and will have to port oyt the wastegate opening in the turbo manifold to try to even things out a bit if you will.
I think generally your average street port adds apx. 30% more hp on the engine.
Notice the difference between the stock port and the "street" ported housing.
#17
Originally Posted by Fd3BOOST' date='Oct 23 2002, 09:51 PM
I spoke to Peter today about this. He says that mazda's stock 2mm apex seal is the best one there is. . Ray his head tech runs 643 rwhp on stock 2mm apex seals and hasn't broke one yet.He and Peter both swear by them. Since mine are fine, I checked them on a straight edge to make sure that they are not bowed out. I will just reuse them. He also told me that on any reman they stock apex seals are always reused and only get replaced if they are not up to spec. So they are not replaced just for the sport of it. If ya catch my drift.
#19
Originally Posted by Fd3BOOST' date='Oct 23 2002, 10:59 PM
I hear that. Peter said only a ping is a ping! A good ping will take out 2mm and 3mm.