aux port sleevs should i leave them out?
#1
Bongolio
Thread Starter
aux port sleevs should i leave them out?
im porting my lim and im wondering if i should take out my port sleeves i know mazdaspeed7 did it im also know ill lose alittle bottom end but will it be worth it for the gain i see up high?please let me know and im sorry i dont have time to search just going on what i already know ....so should i do it?
87 gxl
tb mod
k&n intake
2 3/4 inch piping from cat to straight through muffler
ported uim
87 gxl
tb mod
k&n intake
2 3/4 inch piping from cat to straight through muffler
ported uim
#4
Like Ghandi with a gun
Join Date: Mar 2003
Location: Rapid City, SD
Posts: 4,584
Likes: 0
Received 0 Likes
on
0 Posts
... you'll lose 20hp, and gain .5 hp up high. Your call.
I gauruntee if you remove them and go driving, you'll be tearing your intake manifolds back down so you can reinstall them and actually be able to move off the line faster than handicapped grandmothers cross the street.
I gauruntee if you remove them and go driving, you'll be tearing your intake manifolds back down so you can reinstall them and actually be able to move off the line faster than handicapped grandmothers cross the street.
#7
Displacement > Boost
Join Date: Oct 2002
Location: Mississippi
Posts: 3,503
Likes: 0
Received 0 Likes
on
0 Posts
Taking out the aux sleeves or wiring them open or worse, hogging out the aux runners after removing the sleeves is the worst mod you could ever do to an NA FC!! Case in point: My friend and I have identical street ports done to our cars. His is S5, mine S4 with the lower compression rotors. W/o his aux sleeves, his car is an order of magnitude less burly below 6k rpm (his VDI valve is wired open too).
Don't disable or remove the aux port system! If you do, you will have a car that feels like a Honda, and you'll have no midrange, just top end power.
Don't disable or remove the aux port system! If you do, you will have a car that feels like a Honda, and you'll have no midrange, just top end power.
Trending Topics
#9
i am legendary
Join Date: Sep 2003
Location: Kirkland, WA
Posts: 8,478
Likes: 0
Received 0 Likes
on
0 Posts
See it doesn't really bother me...
I have a combined secondary/aux port streetport with no actuators or sleeves and combined ports on the manifold to engine part of the LIM. I also have an aluminum flywheel with this (even more difficult down low to some) and I must say it didn't even faze me. I daily drive this and don't care, top end power feels great, powerband feels very smooth through the whole rpm range.
Just giving the other side to this, the side that has it and drives it every day.
Also, before doing the port I ran with no sleeves either and I honestly can say I didn't notice a DAMN difference between having them working properly and being fully removed. And before anyone says something like "well obviously they werent working before" I did check them via the how-to on Aaron Cake's site with lithium grease and confirmed they were opening and closing properly.
I have a combined secondary/aux port streetport with no actuators or sleeves and combined ports on the manifold to engine part of the LIM. I also have an aluminum flywheel with this (even more difficult down low to some) and I must say it didn't even faze me. I daily drive this and don't care, top end power feels great, powerband feels very smooth through the whole rpm range.
Just giving the other side to this, the side that has it and drives it every day.
Also, before doing the port I ran with no sleeves either and I honestly can say I didn't notice a DAMN difference between having them working properly and being fully removed. And before anyone says something like "well obviously they werent working before" I did check them via the how-to on Aaron Cake's site with lithium grease and confirmed they were opening and closing properly.
#10
I live in an igloo
Join Date: Jul 2004
Location: calgary alberta
Posts: 2,546
Likes: 0
Received 0 Likes
on
0 Posts
I actually removed my sleeves. A couple reasons
My presilencer pipe was not activating them.. I don't know why, maybe a leak somewhere in the rubber piping that I used...
Also, im adding my turbo in this summer, so I don't give a **** if they're in or not, cause they won't be when the turbo is planted. Plus, I still don't even have my licence! lol, so im just finishing up my car and getting it drivable before I plan on registering it and such..
My presilencer pipe was not activating them.. I don't know why, maybe a leak somewhere in the rubber piping that I used...
Also, im adding my turbo in this summer, so I don't give a **** if they're in or not, cause they won't be when the turbo is planted. Plus, I still don't even have my licence! lol, so im just finishing up my car and getting it drivable before I plan on registering it and such..
#11
Displacement > Boost
Join Date: Oct 2002
Location: Mississippi
Posts: 3,503
Likes: 0
Received 0 Likes
on
0 Posts
You need to drive my car Ddub when I finish the latest build. You know how big my ports are, bwahahaha. Get ready, we're talking nearly flat torque from 2.5k up to 7.
#12
i am legendary
Join Date: Sep 2003
Location: Kirkland, WA
Posts: 8,478
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by 88IntegraLS
You need to drive my car Ddub when I finish the latest build. You know how big my ports are, bwahahaha. Get ready, we're talking nearly flat torque from 2.5k up to 7.
#13
Displacement > Boost
Join Date: Oct 2002
Location: Mississippi
Posts: 3,503
Likes: 0
Received 0 Likes
on
0 Posts
I hardly ever make the runners bigger. They control a large part of the torque curve. Port timing is fair game though, and stock port volume is too small for the runners, so it doesn't hurt to make port volume a little bigger. too bad ur not down here now while the engine is apart, because my ports look a lot bigger in pics than in person. The way they ramp out makes them look huge, but they're not.
#14
i am legendary
Join Date: Sep 2003
Location: Kirkland, WA
Posts: 8,478
Likes: 0
Received 0 Likes
on
0 Posts
Interesting. One of these days I should make a trip down to Oregon to talk rotaries with you and Zach, he keeps trying to convince me to switch schools and come down there
Thread
Thread Starter
Forum
Replies
Last Post
Jeff20B
1st Generation Specific (1979-1985)
73
09-16-18 07:16 PM