Porting a Dorman LS6 reproduction intake
Well TT427 , I thought you had given up on the idea ! Your a brave man ..... good job . So it appears that my suspicion that it is a 3 piece design like I was saying is now confirmed . Since you have gone in from the bottom I don't think you will be able to remove the spine center section that forms the runners. But it does give good access to port and make some shaping and improvement.
Who makes the fast intake?? <---sorry if that sounds stupid. I would like to see a exploded view of the intake. I've been looking around but can't find it. Wouldn't the lengths of the runners determine where the power is made??
Idk why this one was left out but is a port that hadn't been touched. You can see the top of the runner has a substantial ledge, probably 3/16 wide, and their is a bulge on the side ( like the rocker bolt boss) that is pretty intrusive. It's not for a bolt, probably just reinforcing because you have pieces converging there. I just payed it all back and make anything that looks disruptive to airflow less so. It's probably a good idea to blend that top ledge in as far as possible so as not to make the runner act shorter than it is with a huge taper only a 1/2 inch wide.
Last edited by TT427; Jan 12, 2017 at 05:20 PM.
Not any real progress, just evening entries out for now. Was chasing an exhaust leak, found o2 wires frayed, so that has taken up some time. I will post some pics when the inside is done just before I weld it back together.
Teching In
Joined: Apr 2011
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I bought one a few months ago and ported it. I opened up the throttle body opening similar to what is mentioned here. I 1st used a sanding wheel that I carefully inserted and filed away the plastic to open it up. I then polished it down with smother rolls. I also cleaned up all ports and removed all material that disrupted flow. I then smoothed out and polished each intake runner. I do not have Dyno numbers but I will tell you that the car definitely pulls harder. I have a 2000 ss with LTs and a Frost tune.
So measuring the front of tb opening I get 78.3 or so. The back edge of the tb opening measures 85.4, so I don't see a reason one couldn't use an 85 tb. Now my ports clean up at 26.39 width at opening manifold side, 25 head side. In the manifold port as far as I can go about 2.5 inches in I get 32 and it's still transitioning bigger. Any further and the arms touch the sides. Their is definitely room to straighten things out draw taker down gradually, maybe get the port mouth opened up some, and match the head side too. I am doing 317's with removed stud boss, narrowed guide boss and completely removed ramp. Going to mill .040 for a 98 ls1. Would really like to open it up and bell the plenum side openings... just not sure how to go about it.
Im pretty sure its Nylon 66 , most all composite intakes are . The only exception is the LS2 and LS7 they are Nylon 6. Both will plastic weld , but Nylon 66 has a higher melting point and tensile strength and flexural. Do it be the first with gonads to cut it open and post pics.
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Well TT427 , I thought you had given up on the idea ! Your a brave man ..... good job . So it appears that my suspicion that it is a 3 piece design like I was saying is now confirmed . Since you have gone in from the bottom I don't think you will be able to remove the spine center section that forms the runners. But it does give good access to port and make some shaping and improvement.
yes 4 piece lol
not my thread, but for my contributions to the thread this project is on hold. Took advantage of the Huron Speed sale so going a different direction atm. In a few weeks once vacation and minor surgery are done I will probably weld it back together and take some measurements then post that info.
not my thread, but for my contributions to the thread this project is on hold. Took advantage of the Huron Speed sale so going a different direction atm. In a few weeks once vacation and minor surgery are done I will probably weld it back together and take some measurements then post that info.
I wonder if USPTO might have something... Wondering if FAST2 or Dorman has patented any of their Intakes, may be able to get some very helpful drawing/sketch/exploded views...