stprasinz Posted February 5, 2010 Share Posted February 5, 2010 ok guys as the title says. Is there a difference in the 2 variations of the rb20det... one has red top ome silver... I have the early "red top" with the eccs ecu. The only info I can find(I have searched, and searched, and some more searching) Heck Ive tried searching images to see if I can see a difference in the intake runners... I have found nothing!!!! I want to put some forged pistons into it, stainless header, cam gears, a big turbo, etc. But if I got a head that won't flow jack..... Whats the point ay.... Also Will an aftermarket intake fit onto this? Please let me know, maybe post some pics of the heads(intake runner, as in with the intake off just a photo... I'm wondering if its gonna be worth forged with 500cc injectors and megasquirt fired off the crank or just worth a pile of scrap??? thanking you in advance Quote Link to comment Share on other sites More sharing options...
stprasinz Posted February 5, 2010 Author Share Posted February 5, 2010 sorry I have the nics, not the eccs sorry about that Quote Link to comment Share on other sites More sharing options...
pat1 Posted February 5, 2010 Share Posted February 5, 2010 I know nics is a pain in the butt. I have both a red top and a silver top. The silver top is in my car and the red top is used for making my pans. If I were you I would junk the red top and go with the silver top. The ports in the head are alot smaller and the heads don't interchange. Quote Link to comment Share on other sites More sharing options...
stprasinz Posted February 5, 2010 Author Share Posted February 5, 2010 oh wow, the heads don't interchange.. Didn't expect that, all the head gaskets Ive seen were for "rb20det" no specific year etc, same with head gaskets.... I meant all the "nissan complete gasket kits, and head gaskets were all for rb20's... Sorry for miswording Quote Link to comment Share on other sites More sharing options...
pat1 Posted February 5, 2010 Share Posted February 5, 2010 I'm sorry I Meant to say the parts on the heads don't interchange ie valves etc. Quote Link to comment Share on other sites More sharing options...
stprasinz Posted February 5, 2010 Author Share Posted February 5, 2010 so if I build the bottom end, I would still need a new head for real power... Are the intake ports big enough, or able to port to large enough to make power, As in 500+ crank hp.... suckky either way.... Quote Link to comment Share on other sites More sharing options...
kiwi303 Posted February 5, 2010 Share Posted February 5, 2010 The NICS is a 12 runner system, at low revs, onlyone set of runners (6) opens, as your foot goes down, the other six open, much like primary and secondaries on carbs. It's an early attempt at variable intake tracts. The head surface where it meets the block is the same, using the same head gasket, but everything from the head face upwards is different. Quote Link to comment Share on other sites More sharing options...
stprasinz Posted February 5, 2010 Author Share Posted February 5, 2010 Ok, but can someone post pictures of a eccs type head runners? Can I port this head and still flow good hp? I know about the runner and fuel injection system being different, can I just put an aftermarket intake on it? And I'm going megasquirt if I use it so the fuel injection system doesn't matter either. I can not find any rock solid inof, to sway either way... I notived these are very small runners when I popped the intake off.... Quote Link to comment Share on other sites More sharing options...
kiwi303 Posted February 6, 2010 Share Posted February 6, 2010 for the NICS, you'd need a custom made intake, no-one makes an aftermarket DET intake for the NICS, just for the ECCS RB20DET since they are far more common. Frankly, I would just find an ECCS RB20 head, I have a RB20DE head in the shed now, but shipping to the US is simply not economical, I looked into that for someone else who wanted my head cheaper to find a RB20DE/T ECCS head local to you. Quote Link to comment Share on other sites More sharing options...
stprasinz Posted February 6, 2010 Author Share Posted February 6, 2010 yeah, thats what I'm thinking... but after looking, this head could be made to flow... thing is, I get the head to flow, then I am stuck makeing the intake flow.... I might be able to port, and polish... but air tight aluminum welds??? And I don't truse any local shops around here... Only one actual "welding machine shop" in my area, and he didn't know if he could have been able to weld on my aluminum intake when I asked him... So makeing one I would think would be out of his league..... Yeah pretty ironic, a metal fabrication shop that doesn't know if it can weld aluminum? yeah I'm sure he's top notch right... Quote Link to comment Share on other sites More sharing options...
kiwi303 Posted February 6, 2010 Share Posted February 6, 2010 Air tight welds? Just hit it with a MIG and when it's congealed solid, take it to any plumber and coat the lumps with braze to fill any holes and cracks Quote Link to comment Share on other sites More sharing options...
stprasinz Posted February 6, 2010 Author Share Posted February 6, 2010 wow, never really thought of that.... ha, I wasn't thinking of use alternative sealing methods.... ha Quote Link to comment Share on other sites More sharing options...
kiwi303 Posted February 7, 2010 Share Posted February 7, 2010 Cheapo arc welder on food grade stainless connecting to high carbon steel base plate, with mild steel rods... not the neatest or most air tight of fixes... My first try at sealing was to PAINT the whole join with RTV liquid gasket... didn't work, so I did the plumbers braze trick, that sealed the leak After all, if they can fix water pipes dry and leak free, they should be able to manage airtight or they wouldn't be in a business where they can cause leaks in homes Quote Link to comment Share on other sites More sharing options...
stprasinz Posted February 7, 2010 Author Share Posted February 7, 2010 yeah, thats a good point, air might move more violently , but I don't think it carries the same force as water, and since water goes to a good 70 psi in almost all applications..... Quote Link to comment Share on other sites More sharing options...
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