![]() ![]() The bigger one makes the port the less the velocity of the air and charge one introduces into the cylinder,since vacuum values remain constant. Owr engines depend on vacuum to draw in fuel and air. Hi, the most common mistake made when porting, is to enlarge the ports to the gasket size. Wear glasses and a dust mask, earplugs are nice too! ![]() If you do work in the chambers get a set of sacrificial valves to protect the seats. they seem to work pretty good, almost mirror finish after 320 paper. also had some polishing compound of some sort. Polishing - i have some dense white cloth rolls, wheels and a bullet shape that came w/Dremel kit. a thin layer smeared in the ports before hitting w/cartridge rolls helps reduce the dust. I have some kind of soft wax stuff, dip the burs in every few moments, helps keep the heat down. just about everything else is done with the rolls. The burs remove a lot of material very quickly, I've only used them to open up to the gasket lines. I use this w/finer grit on the exhaust side before polishing.Īlso have these 3 shapes of carbide burs: Take a pretty long 1/4" bolt w/smooth shank, lop off head and cut a slot an inch down the center - long folded sand paper strips fit nicely, poor mans flap wheel. scored a stuffed ziplock bag full of them with 2 mandrels for very cheap off ebay. Tools: using a 1/4" electric Makita grinder through a foot pedal speed controller, also have an adjustable speed Dremel w/flex shaft attachment for getting to some difficult areas.Ĭartridge rolls: tootsies and tapered, I think 80 & 120 grit. probably an excessive amount of practice time but I believe it was time well spent. Look at this for starters: /diyportįirst timer here - I've been playing with a junk head for the last 2 months getting a feel for it and am about to start on my good casting. Help! Can anyone tell me what to do! My buddy only does Hondas so he doesn't know much about Audis. We took it out and drove it and it started to make scraping and knocking noises. Once started it couldn't idle and kept making weird noises. We tried to start it again and it was really hard. We stopped and hooked the car back up normal and took off the sand supply. The check engine light was on and the engine was bucking and kicking and sounding really weird. After running the car and letting it suck in sand we got about half way through a 25 lb bag. I was worried that it might cause problems but he figured it'd be OK as long as we didn't make boost and it get sucked in the turbo. He wanted to let the engine suck in the sand through the intake so it would port it out and then push it out the ehxaust so it would port the exhaust manifold. We got a bag of sandblasting sand and hooked up into the intake and started the car. So I got with my friend that tunes Hondas and we decided to try it ourselves. We found out they used abrasive material to do it like gritty sand. I was recommended to port and polish the intake and exhaust. I've had a k04 and chip for a while and wanted to get more performance. ![]()
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