Completely Removing the 6th port sleeves?
#1
Green Flameless
Thread Starter
iTrader: (2)
Join Date: Feb 2002
Location: North Central PA
Posts: 2,242
Likes: 0
Received 0 Likes
on
0 Posts
Completely Removing the 6th port sleeves?
Hey guys, i read all the time about people wiring their 6th ports perminently open, and i'm elbow deep in a rebuild right now, I was wondering about simply removing the 6th port sleeves all together.. is this a wise move?
thanks
thanks
#3
Green Flameless
Thread Starter
iTrader: (2)
Join Date: Feb 2002
Location: North Central PA
Posts: 2,242
Likes: 0
Received 0 Likes
on
0 Posts
That's what i was looking for, I'm only going to be doing a mild (stage one, [i]possibly[i] stage two stree port... I'll probably just end up tying them off.. . thanks for the help!
Trending Topics
#10
Rotary Enthusiast
Join Date: Dec 2002
Location: Darwin, NT, Australia
Posts: 1,228
Likes: 0
Received 0 Likes
on
0 Posts
I hate to go against the trend here, but I noticed a marked improvement in the top end of my power band when I took out my sleeves alltogether and kept everything else the same...
Didn't notice any difference in the low end.. possibly because my car doesn't spend long in the sub 4,000rpm territory
This is when my 6-port was N/A of course, I'll bet theres an even bigger improvement to taking them out now that its force fed.
Didn't notice any difference in the low end.. possibly because my car doesn't spend long in the sub 4,000rpm territory
This is when my 6-port was N/A of course, I'll bet theres an even bigger improvement to taking them out now that its force fed.
#11
Junior Member
Join Date: Jun 2003
Location: columbus,OH,USA
Posts: 37
Likes: 0
Received 0 Likes
on
0 Posts
I took mine out and ported the manifold, but haven't put it back together yet. One thread I read, Mazdaspeed 7 said he noticed gains in all bands, so thats why I did it. We'll see how it works out.
#12
Eat Rice Don't Drive it.
iTrader: (3)
Originally posted by White_FC
I hate to go against the trend here, but I noticed a marked improvement in the top end of my power band when I took out my sleeves alltogether and kept everything else the same...
Didn't notice any difference in the low end.. possibly because my car doesn't spend long in the sub 4,000rpm territory
This is when my 6-port was N/A of course, I'll bet theres an even bigger improvement to taking them out now that its force fed.
I hate to go against the trend here, but I noticed a marked improvement in the top end of my power band when I took out my sleeves alltogether and kept everything else the same...
Didn't notice any difference in the low end.. possibly because my car doesn't spend long in the sub 4,000rpm territory
This is when my 6-port was N/A of course, I'll bet theres an even bigger improvement to taking them out now that its force fed.
Mazda made this system for a reason. They still use it on the 6spd RX-8. There are three basic reasons: Drivability, fuel consumption, and Power.
When your stock you don't reelly notice much if they don't work. When I got my true duals I had just started to notice my ports stop working so I bleaned them out and it was a BIG difference from WORKING to not working. One had been stuck half way open and the otherone just couldn't open at all. I noticed a bit more low end with them working since BOTH were closed now providing more tq down low. I don't think all of us drive above 4k rpms ALL DAY! which is the only situation where it won't make a difference.
Fuel consumption is also a factor because with less tq(wired open or taken out) you waste more gasoline in daily driving at lower and mid rpms. Also when your at or above 4k all four injectors are firing so your fuel consumption goes through the roof.
Power in all RPMs is important to me because I don't drive at 4k like I already said the only time I am above 4k is if I am in a HURRY or on the highway doing 100mph.
If you have a turbo'ed N/a then that would make up for the power loss but the 6 port design is inferior to the 4 port when dealing with forced induction so meh.
Santiago
#13
Green Flameless
Thread Starter
iTrader: (2)
Join Date: Feb 2002
Location: North Central PA
Posts: 2,242
Likes: 0
Received 0 Likes
on
0 Posts
wow, lots of good info here Tough choice, but i think i'm going to go with the whole "properly repair them" trend... i wouldn't mind all the low end i could get
#14
Senior Member
iTrader: (10)
Join Date: Sep 2002
Location: Chicago
Posts: 469
Likes: 0
Received 0 Likes
on
0 Posts
Just as 1987RX7guy said, the functioning system works better. Period.
If you do not care about low end power or you plan on just keeping the revs up all the time, then its fine. Bottom line is that it is your choice. If you take out the sleaves please take out the rods too. They are an even bigger restriction.
If you do not care about low end power or you plan on just keeping the revs up all the time, then its fine. Bottom line is that it is your choice. If you take out the sleaves please take out the rods too. They are an even bigger restriction.
#16
Rotary Enthusiast
Join Date: Dec 2002
Location: Darwin, NT, Australia
Posts: 1,228
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by 1987RX7guy
Mazda made this system for a reason. They still use it on the 6spd RX-8. There are three basic reasons: Drivability, fuel consumption, and Power.
Mazda made this system for a reason. They still use it on the 6spd RX-8. There are three basic reasons: Drivability, fuel consumption, and Power.
If your car is 100% stock then yes, I would agree that the actuated 6-port system is of marginal bennefit.
When your stock you don't reelly notice much if they don't work. When I got my true duals I had just started to notice my ports stop working so I bleaned them out and it was a BIG difference from WORKING to not working. One had been stuck half way open and the otherone just couldn't open at all. I noticed a bit more low end with them working since BOTH were closed now providing more tq down low. I don't think all of us drive above 4k rpms ALL DAY! which is the only situation where it won't make a difference.
You had more power with the zorst dude, of course the difference would be more apparent, its a percentage gain between them not working and working, they don't add a constant ammount of HP or anything.
I'd bet my left nut if you took out your sleeves with that exhaust you would have made another just as apparent increase in your high rpm power band.
Fuel consumption is also a factor because with less tq(wired open or taken out) you waste more gasoline in daily driving at lower and mid rpms. Also when your at or above 4k all four injectors are firing so your fuel consumption goes through the roof.
Secondary injectors also only come online if your at or near WOT, they're not just RPM activated...
Power in all RPMs is important to me because I don't drive at 4k like I already said the only time I am above 4k is if I am in a HURRY or on the highway doing 100mph.
Well thats fair enough for you, I was just adding my input on how it changed my car, I for one am not putting the sleeves back in my motor...
If you have a turbo'ed N/a then that would make up for the power loss but the 6 port design is inferior to the 4 port when dealing with forced induction so meh.
Santiago
#17
...94% correct.
S4, NA, all emmisions and air pump removed. I was under the impression that if the air pump was removed then there wouldn't be any way for the actuators to work. So I removed them, and with no loss of drivabillity and a gain up top. then my car broke...
#20
Eat Rice Don't Drive it.
iTrader: (3)
Originally posted by Makenzie71
S4, NA, all emmisions and air pump removed. I was under the impression that if the air pump was removed then there wouldn't be any way for the actuators to work. So I removed them, and with no loss of drivabillity and a gain up top. then my car broke...
S4, NA, all emmisions and air pump removed. I was under the impression that if the air pump was removed then there wouldn't be any way for the actuators to work. So I removed them, and with no loss of drivabillity and a gain up top. then my car broke...
Santiago
If 6-ports are better than 4-ports at forced induction then why did mazda use the 4-port design for all the TII's and for the REW?