Head porting kit harbor freight1/6/2024 ![]() Im feeling a tiny bit more confident about this now that I think i can actually do it without screwing anything up. Also will need to revisit jetting once the port job is done. This will be a bit different from that NR racing head because I want to retain all of the low end torque with a compromise to not get the 'max flow" but enough flow for improvement at mid to high without the sacrifice of torque loss on the low end. Transitions to the bowl will be rounded off to get rid of the sharp corners. Was a great video, ill clean up the ports without enlarging them, keeping a somewhat rough texture on intake, will polish up the exhaust port. Video also talked about cleaning up the port but not so much changing the size, because port size is equally as important as these CFM numbers, because intake and exhaust velocity are crucial to efficient operation, and if you hog out a port, it kills velocity, which kills low end torque (but can see improvements on the high end). Seems like he spends about 3-5 seconds talking about "lowering the floor on the intake and raising the roof on the exhaust" but doesn't elaborate on it sadly. AKRA (racing) rules don't let you jack with it too much, hence the talk about dont touch the guide etc. Now from what I get in the video where the port transitions to the bowl, there are sharp edges that need to be blended into the bowl. 3-.5 hp increase in HP for the honda gx200 clone engines, or about a 7.6% increase is awesomeness, mainly found in the mid to high RPM range. Adjust the Ram to eliminate or diminish an off- center load. A mild port job on the clone engines - according to ARC Racing video here: If the Pump seems unusually hard to operate, immediately stop. Okay, so the more I am learning about this, the more reserved I am going to be with material removal. I think I leave the intake at 80 grit, the chamber at 320 grit, and the exhaust as polished as I care to make it (which is also usually 320 grit - because I'm lazy).īelow is the exhaust port on the NR Racing Hemi Head. They start out kinda big and are tight in the port, but after a few minutes they get small enough to fit in some of tighter nooks. 180g, 280g, 320g abrasive finishing buffs. Ohhhh, I really like these for finishing up the exhaust and combustion chamber. Post added at 08:48 PM - Previous post was at 08:38 PM. I'll have to take their written word on that, I'd love to see if a valve job make noticeable HP difference on a DYNO or flow difference on a Bench. The telephone number for the Harbor Freight store in Bossier City (Store 2920) is 1-31. Mondays through Saturdays, and from 9 a.m. Our store hours in Bossier City are 8 a.m. Before you begin, I would highly suggest stocking up on a supply of. A 23 hole per side kit (kit 2) is also available, this uses a 31 drill bit (.120). 80 grit spiral cartridges Arbor with 1/4 in. ![]() BSS-3001 : Black Smoke Series Seat Cutter Blade 54.99. ![]() The supplied bushing guides a 40 drill bit (.098). The kit is awesome, and exactly what you need to clean you intake valves with minimal mess and having walnut shells everywhere. The kit we used (kit 1) has a drilling fixture with 35 holes on each side. However they are very versatile.I've read that a good valve job also really helps the flow a bunch on these small engines. The Harbor Freight Tools store in Bossier City (Store 2920) is located at 2001 Airline Drive, Suite 135, Bossier City, LA 71111. To port your own barrel, you just need to supply the drill. Only thing with air is the tools are relatively cheap.the compressors. Air tools or a quality adjustable electric grinder are well worth the investment. Considering I burnt out 2 Dremel tools in 1 year before I switched to air. It has lasted me over 3 years of frequent use. I bought one of there "maintenance grinders" for $15. Again thxs to those that posted(even those that weren't much help).Did you check out the selection of grinders on the McMaster-Carr website. Files and rasps for various stock removal applications Read More. Fortunately there is a harbor freight close and I've already sourced a pneumatic die grinder there. I've done a bit of grinding, cutting and massaging so I'm pretty sure I should be ok, but I have a wasted head I can play with anyways. I even searched summit although I guess I didn't use the right terms. I have already checked the local Home Depot and Lowes, and they have the cheesy dremel bits that take forever to remove any material(good for finishing up though). ![]() I didn't have much hope after the first two posts, but this is great. ![]()
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