Duheee, sometimes I need to think before I post.
Runner Dings
Thread Starter
Safety Car
Joined: Nov 2008
Posts: 4,328
Likes: 15
From: Jacksonville FL
Runner Dings
Can dings be worked out of OEM runner tubes? How? I was gonna maybe port/polish and then polish the outside.
Anybody ever thought of some type of coating on the insides to smooth things out instead of polishing? Powder coating maybe? Being in the air/fuel mix it would have to durable, pretty well flake proof. Just wondering out loud.
Thanks!
Anybody ever thought of some type of coating on the insides to smooth things out instead of polishing? Powder coating maybe? Being in the air/fuel mix it would have to durable, pretty well flake proof. Just wondering out loud.
Thanks!
Race Director
Joined: Apr 2003
Posts: 17,697
Likes: 1,666
From: moraga ca
I had my SuperRam runners and manifold extrude honed. Opens them up and makes them as smooth as glass. There is really no air/fuel mix to speak of. Just air passes through the runners. The fuel is injected right before the intake port in the heads.
Thread Starter
Safety Car
Joined: Nov 2008
Posts: 4,328
Likes: 15
From: Jacksonville FL
Race Director
Joined: Sep 2003
Posts: 16,834
Likes: 337
From: Database Error Indiana
Someone on here went to a music store that repairs brass horns and they did the runners. They push steel ***** through the tubes to remove dents. I think somebody bought the ***** off ebay too and did it. Its been years but if you search you should find the info.
Team Owner
Joined: Dec 2000
Posts: 21,090
Likes: 282
From: Phila., PA burbs
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,062
From: altered state
St. Jude Donor '05
Be careful using those so you dont change the runner shape, easy to do. 
Dont worry about porting the inside of a stock runner they are thin so not much can be done. If you feel better taking a flap wheel to the inside knock yourself out but you wont gain anything. btdt
Dont worry about porting the inside of a stock runner they are thin so not much can be done. If you feel better taking a flap wheel to the inside knock yourself out but you wont gain anything. btdt
Thread Starter
Safety Car
Joined: Nov 2008
Posts: 4,328
Likes: 15
From: Jacksonville FL
TA-Thanks for that link, it would probly be cheaper to get this kit. Expanding out the thin a** runners is kinda scary but getting em back to round would be great.
Cuisinart- The runners are definately too thin to port but I was thinking more about gasket matching the flanges if needed. This thin-ness was why I asked about a coating. Insta-slick
Thanks for the great input! I love this Forum!
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Le Mans Master
Joined: May 2004
Posts: 5,866
Likes: 60
From: Hellinois
Finalist 2020 C4 of the Year - Modified
Be careful using those so you dont change the runner shape, easy to do. Dont worry about porting the inside of a stock runner they are thin so not much can be done. If you feel better taking a flap wheel to the inside knock yourself out but you wont gain anything. btdt
Dont worry about porting the inside of a stock runner they are thin so not much can be done. If you feel better taking a flap wheel to the inside knock yourself out but you wont gain anything. btdt
Changing the runner shape is VERY easy to do. My first attempt left my runners looking like the Michelin Man. HOWEVER, the steel ***** do work! The trick is to use a grinder and remove the lip on the inside of the runner right at the flange so the first ball drops in at least half way or more. Then use a lot of oil and drive the ball through the runner with the smaller *****. I strongly suggest getting an old battered runner to practice on first. My runners came out perfectly round and smooth after using the kit I bought on ebay. The ***** will also remove the small clearance indentions the factory put in the tubes.
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