bugman1973

correct me if Im wrong. im going to clean out the 5th and 6th ports on the se engine but do i have to take off the entire lower manifold? or is there an easier way?

Siraniko

iTrader: (13)

yes and nope

XLR8

iTrader: (52)

You will need to remove the entire intake manifold to get rid of those nasty 6 ports. This is an opertune time to clean your TB, UIM and LIM. I did this proccess with great success and with a nice surprise of the increase in power gains. You will be amazed by the amount of carbon build-up in your intake. Mine looked like Cheech had been smoking through it since 85.

This is bacically what I did.

1. Removed intake.

2. Seperated everything and cleaned thoroughly. Use a quality parts cleaner/carb cleaner and a wire brush. You will need something a little long to get in those runners. (Sandblasting works great too, but I didn't have the resources)

3. Remove the 6 port sleeves and clean the port on the engine.

4. You will see the actuating rods coming through the manifold into the runner where it actuates the sleeve. Your shooting for optimum flow so these suckers gotta go. I simply twisted and pryed on them until they popped out.

5. You will be left with 2 small holes in your manifold where the rods were. Just put some masking tape over them, flip it over and fill them with JB weld.

6 After the JB weld is dried, you are good to go.

7. Put everything back together and enjoy your new found power.

Note: Many people have argued that removing the 6 ports will reduce low end torque. I personally could not tell the difference down low but was amazed of the top end power and smoothness that was gained. However, I have never had a set of perfect operating 6 ports so I really can't compare. To me, the design is flawed and more trouble then they are worth

Enjoy.

Rx-7Doctor

iTrader: (13)

The removal of the 6 ports does lose bottom end. It's ok if you are running a carb'd.
I have run them without and with the pineapple racing sleeves. With the pineapple racing sleeves, hands down it was much better.

bugman1973

thats what i thought about doing, just removing them because, they stick a little at high rpms i guess. its kind of annoying probably all that carbon built up. and i guess i need new intake gaskets right?

bugman1973

well i dont really stay under like 3k rpms much so i thought i would be alright to run with out them

Rx-7Doctor

iTrader: (13)

You are going to have to remove everything to remove them. So why not clean it all up and get the pineapple racing sleeves and have an engine that runs much better.

bugman1973

not sure if they will still stick or not like they aren't opening all the way. i have to wait till next week anyways i was just weighing my options.

ericgrau

iTrader: (1)

A couple little rods won't obstruct flow enough to make a difference. For that matter, the piping, etc. doesn't obstruct flow. I ran the numbers in a recent thread and it was less than 0.5HP lost (and only at high RPM's). Things like the ports and the air filter restrict flow a lot more. The reason is because the pipe diameter is too high. Cutting the diameter half, for example, would increase restriction by a factor of 16++. That's the kind of restriction that matters. Things that cut into the flow area a little bit are nothing by comparison.

And yeah, you do lose a good bit of low end power and mpg with the 5th and 6th ports held open. Otherwise every piston engine manufacturer would take the easy boost in power by setting up valve timing for high revs. But they don't b/c mpg and low end torque suffers too much. That's why VTEC adds so much power. Really any piston engine could easily set the cams right and gain the same power, but the low end would suffer too much.

GavinJuice

as long as you got everything off while your doing this, i would have your injectors sent off and cleaned. cheap and well worth it.

RW-7

iTrader: (56)

+1 FOR PINEAPPLE INSERTS

StricklyOldskool

I agree with Doc...use your time and money wisely. Remove your intake clean everything up, replace intake manifold to engine gasket. "While you have the manifold off go ahead and block off the water jackets with plugs from Pineapple racing" will save you from having to replace those rubber "o" rings down the road. Carb cleaner is a great thing to use to clean the carbon off everything. I HIGHLY suggest Autozone carb cleaner.
GO with the Pineapple inserts over taking them out. Read a little on intake flow characteristics and you will understand why their design will be a much better bet. Will save your torque down low along with good air flow upstairs.

bugman1973

Ok i will go with the pineapple sleaves but i have another question why do i have to block off the water jackets? what does this acomplish besides saving a few o-rings down the road?

3rd and final 7

iTrader: (9)

ther are no water jackets where the low meets the engine.

bugman1973

thanks for clearing that up i have never taken that part off so i wasnt sure but i guess he wasnt either