DIY Port & Polish Throttle Body (guide)

TitanRev

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Below is a simple guide on cleaning and PnP your TB...

My TB was due for service since it's never been properly clean before..previous ways was just to spray some cleaner to clean it so I went back early after work to clean and PnP the TB myself.

What you need:
1. Engine cleaner or degreaser x 3 cans...any brand will do..I use to 3in1 cleaner with the lemon citrus scent but this cleaner is quite harsh on the hands....I skin was dried and itchy after I finish the job so better wear a glove...
2. Appropriate tools (depending on car make)...mine mostly are torque screw...
3. tooth brush
4. old cloth 3 pcs will do
5. a small container to soak some smaller parts in the cleaner.
6. old newspaper
7. Autosol or any mag or Alum polish or compound
8. sand paper..you will need a few grit...this is my choice
100
240
360
1500
2000

9. Lots of patience & elbow grease....

If you are not confident in using a Dremel to do the PnP this is the way...of course it's consumes a lot of time.

How the TB looks like before cleaning and PnP...dirty and the inner surface of the intake is rough and I saw some bumps here and there some ridges...


The cleaning process...before cleaning, take out all those sensors attached to the TB to thoroughly clean all the parts and the sensors.



The porting & polish process
Starting with the 100 grit. you can see all the sanded marks....use this 100 to sand out bumps and ridges...then work your way down to finer sand papers until all you feel is smooth surface. For the idle control tunnel..I just did some light porting as I don't want to mess up the idling


Close of view of after 100 grit sanding


After sanding with the 100 grit...move to a finer grit and after each grit sanding spray it with the cleaner and start with another finer grit....the 1500 is to get rid of minor marks and the 2000 water sanding is to give it a mirror finish. Then use the autosol or ALU compound to further smoothen the surface...and you are done...

Important thing is DO NOT sand the part where the butterfly valve closes as it will make the intake diameter larger from the sanding process if you sand out the valve closing area it will mess up the idling also....the butterfly valve will need an impact wrench to take out as I don't have 1. I leave the butterfly valve intact. Opening it with a normal tool will damage the bolt head...which I did on 1....:bawling::biggrin:

NOTE: after the process, the 1st start up the engine rev will be higher for a few seconds, then it will settle back to the normal as the ECU is adjust the intake.

The result....sorry that I skip the other grit process pictures because I was trying to get it done in 1 night. Although the result was not too perfect but I'm happy with it as the whole inner side of the intake is smooth like chrome.....



Reassembly...Looks new and nice...
 
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Supra_Fanatics

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Supra_Fanatics

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Great job bro...great job. Next time send my car to you for cleaning :rofl:
 

TitanRev

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=.=' SF, cannot clean yourself kah....already posted there GUIDE~~I charged very expensive wan...:biggrin:
 

Supra_Fanatics

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Supra_Fanatics

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Yes, very nice job well done! :top: :top: Two Thumbs Up!

Clean myself, very tiring ma...pro job better let the pros do it la bro :biggrin:
 

TitanRev

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TitanRev

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Sf, this one cannot count as pro job...this is amateurs job only....
 

BLANk

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BLANk

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DIY rocks~~~

after done...100% satisfaction guarantee...hehe

btw,u just let the TPS,ISCV and etc soak in the degreaser???u should use those electronic cleaner for that...
 
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TitanRev

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Blank, didnt soak la...I just put them there so can clean them all....after cleaning I use the hair dryer to blow dry them and left them to dry....will it cause problem? I did drive the car around and nothing wrong so I guess it's ok gua....Hahahaha
 

[H] [K] [S]

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[H] [K] [S]

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Nice... Make sure next day you're not working coz your hands surely need the rest... :rofl:
 

arturo

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TR...u used dremel to polish or just the sandpaper n yr handpower? if u have a dremel can put on the buffing attachment n put some toothpaste n get real mirror finish...
 

Mrnazmi

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Mrnazmi

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Good job for DIY Port & Polish Throttle Body Bro..!
Latter can start to P&P heads pulak...:driver:
Better flow + better response!
 

autocrosser

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Hey, bro

Great post! Can you tell us what is the performance gain from this job? Can you really feel the improvement? Thanks!!
 

TitanRev

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Arturo, I use sandpapers a few different grit & 2 handpower...hahahaha....

Autocrosser, the 1st thing notice immediately if the respond of the rev....the rev climb faster and smoother...wont hesitate and the sound during WOT is different then before..louder...

TQ subaru...

TQ MrNazmi..
 

TitanRev

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CARD, I didn't look much into the FC since it's not my priority...but the rev definitely seems more lively after the PnP.
 

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TitanRev

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digital caliper I have arturo...don't have DREMEL tools....actually how much is the price for a set of DREMEL??
 

arturo

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arturo

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i got a quote of RM785 for a dremel 395 multipro + a flexishaft + 55pcs accessory back in june...but i'm using a dremel 300 multipro (rm300)...the model before this + a 400pcs accessory set from rs-online for rm88 hehehe

quite hard to find suppliers who have stock on hand...the quote i got had a back to back order...so i'm guessing he had to order from the states then only send over the dremel.
 

Izso

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Izso

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Eh.. to those who DIY this TB polish, make sure you don't get overzealous with the polishing otherwise if your butterfly plate is smaller than the TB outake mouth, you're gonna have big time idling issues.
 

JINEIL2EN

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JINEIL2EN

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Use hand ah ?? :biggrin::biggrin:
ofcos la... haha:biggrin:

cos the main point is not to port it bigger, but smoother... just like how u done to ur throttle ma...:idea:
 

Izso

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Izso

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Izso...vaccum leak from the tips of the butterfly valve?
Yeap. My first TB I polish kilat kilat and I increased the throat size without considering the butterfly plate. When I face the TB against the sunlight, I can see a full sun eclipse one.. very the bad. Idling was crazy!

2nd TB the 'eclipse' was much smaller and lucky for me it didn't cause any idling issues.
 

fstr

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fstr

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TR taikor, after u did d porting a bit... did u feel any difference in acceleration?
 

TitanRev

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unker, acceleration did improved and the rev also goes up faster especially during the low range but still slower than your Gymkhana monster...

Izso, yeah..you are right...the butterfly valve area cannot touch....can only do the area before the BV and after the BV.

Arturo, wah quite expensive....
 

TitanRev

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ofcos la... haha:biggrin:

cos the main point is not to port it bigger, but smoother... just like how u done to ur throttle ma...:idea:
I think my hand will become cacat after that...
 

Izso

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TR taikor, after u did d porting a bit... did u feel any difference in acceleration?
Eh taikor.. I tot you tukar to T3t3k besar (TB) besar already? Nothing beats a bigger TB but low end will be a bit hard to control so I'm told.

when you gonna to twin t3t3k besar? :biggrin:
 

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I also want TTB...Hehehehe
 

fstr

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fstr

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just now i kasi sand my extra tb, sand till finger also can putus liow
 

JINEIL2EN

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JINEIL2EN

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unker, i reco u using 1 kayu round shape with dish wash sponge with a layer of double side tape then with the sand paper on the outer layer... that shld save ur finger...:burnout:
 

TitanRev

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unker old already....Hahahaha....
 

fstr

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fstr

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i think if u port the bottom u get finer low ends and if u port the top part u get slightly mid end...

true guys?
 

TitanRev

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unker, I both top and lower part is port.....only satisfied...if port only 1 place result not so satisfied.
 

JINEIL2EN

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JINEIL2EN

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unker, I both top and lower part is port.....only satisfied...if port only 1 place result not so satisfied.
but now, u just port the outer part, haven't port the inside part.... mayb after port the inside will get better 'feel' ler..???:proud:


 

fstr

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fstr

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i only port the bottom cos i need more low end for my auto.

results after porting is good, some feel is noticed. :biggrin: