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Everything posted by Derek
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Twin cam head for the L6 from Derek at Datsunworks
Derek replied to Derek's topic in Nissan L6 Forum
That second video captures the sound better than anything I've done. He used a Gopro 7 and although the video is washed out the audio is really good. It is the most accurate capture so far. I've been using my iphone and even with external microphones it never quite got the right sound. -
Twin cam head for the L6 from Derek at Datsunworks
Derek replied to Derek's topic in Nissan L6 Forum
I am in envy of your car. Or at the very least your engine compartment:) -
Twin cam head for the L6 from Derek at Datsunworks
Derek replied to Derek's topic in Nissan L6 Forum
Here is another one he sent me. -
Twin cam head for the L6 from Derek at Datsunworks
Derek replied to Derek's topic in Nissan L6 Forum
SN005 posted this on Church of L group on face book. He's happy:) -
Shameless plug. EDIS Kit
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Twin cam head for the L6 from Derek at Datsunworks
Derek replied to Derek's topic in Nissan L6 Forum
I wonder if that was to increase runner length or packaging issues. -
Twin cam head for the L6 from Derek at Datsunworks
Derek replied to Derek's topic in Nissan L6 Forum
VCT phaser test. -
Twin cam head for the L6 from Derek at Datsunworks
Derek replied to Derek's topic in Nissan L6 Forum
Hi Duffy That is probably the longest the manifolds can be with the engine tilted that direction. -
Twin cam head for the L6 from Derek at Datsunworks
Derek replied to Derek's topic in Nissan L6 Forum
Realized I never posted this pic of SN005. The Ferrea rockers look amazing. Jenvey 48mm and a Megasquirt setup from Linfert Performance. -
Twin cam head for the L6 from Derek at Datsunworks
Derek replied to Derek's topic in Nissan L6 Forum
Thanks. Yea the S7 looks so nice. The 8620 looked great with the copper plating but not so great after spending time in hot oil. The best part about the S7 is it's through hardened so as long as there is enough base circle you can regrind it. -
Twin cam head for the L6 from Derek at Datsunworks
Derek replied to Derek's topic in Nissan L6 Forum
I'll do COP when my $200.00 Magnecor wires wear out. And then only if they look like plug wires:) -
Twin cam head for the L6 from Derek at Datsunworks
Derek replied to Derek's topic in Nissan L6 Forum
Making progress. Almost at the point where I can test the oil system. Front covers on. Internal lines finished. Externals as well. Getting closer! Hopefully Monday I can start testing the oil volume/pressures. -
Thanks for the info. I ended up going .240" at the deepest section of the intake. There was .440" of meat in that area. The valves are angled at 15 degrees so the depth lessens very quickly. The problem I'm going to have is there isn't enough piston diameter at 87mm for there to be a decent amount of material. I imagine everyone that runs one of these heads will at least have 88MM or better bores and probably custom pistons.
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Twin cam head for the L6 from Derek at Datsunworks
Derek replied to Derek's topic in Nissan L6 Forum
Thanks. The zig zag lets you adjust the length of the line for final tweaking. That one was a little more pronounced than I would have liked but it's hidden so I left it. Even a single bend will give you some options. -
Twin cam head for the L6 from Derek at Datsunworks
Derek replied to Derek's topic in Nissan L6 Forum
Exterior hard lines finished. Got everything fabed up. Very happy with the results. I added a sandwich adapter in order to be able to get more oil for the VCT. The oil pressure port was fine for the cam oil feeds but I felt it would not keep up with the VCT. I moved everything over to the sandwich plate. The oil pressure switches are still on the oil pressure port. Rear oil feed. Hard lines are a ton of effort but for me well worth it. -
Twin cam head for the L6 from Derek at Datsunworks
Derek replied to Derek's topic in Nissan L6 Forum
Hi Tioga I may give that a try and see how it looks. I really like the wires in the front but then again I never tried them running towards the back. It's pretty crowded back there with the injection hard lines. -
Looks like I will need to cut valve reliefs in my test motor for the KN20-VCT. The pistons are ITM RY6134-040 flat tops with no relief cut. I'm trying to find out how deep I can go before I compromise the integrity of the piston. ITM in California has no data. Thanks Derek
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Twin cam head for the L6 from Derek at Datsunworks
Derek replied to Derek's topic in Nissan L6 Forum
Thanks -
Twin cam head for the L6 from Derek at Datsunworks
Derek replied to Derek's topic in Nissan L6 Forum
VCT Plumbing Got the hardlines mostly done for the intake phaser control. Went well just tedious and time consuming. The bottom two lines are advance and retard and the top two lines are returns. The center is the feed. They are 5/16 OD which gives me an ID that closely matches the Honda circuit. It started off easy and then I remembered that an alternator needed to sit in there. That made things a little more interesting. The bulkhead fittings worked out great. I chose to use soft aluminum tubing for the interior lines. I knew routing them was going to be a bitch and I wasn’t wrong. Looks a little rough but it will work. Non of the fittings are compressed yet. I’ll lock everything down during the final assembly and then tweak everything so they have clearance. Feeding through the caps turned out to be a better way to go than through the tower bases. I had to redesign the EDIS coil bracket since the valve was now in the way. It’s not as hidden as it used to be but when the throttle bodies and stacks are on it should be buried pretty well. I’m super glad I went this route with the VCT valve. The look of it is exactly what I wanted and he hard lines fit the whole theme of the build. Lots happening over the next few weeks as I try and finish it up and get it back in the car. -
Wow that looks great. There is a lot going on in that engine bay.
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Twin cam head for the L6 from Derek at Datsunworks
Derek replied to Derek's topic in Nissan L6 Forum
I cut them in the mill. It's a bit of a pain when doing single pieces since it's not worth making a fixture. I hold the stock in a vice but the jaws need to be longer than the cut out or things get ugly when your doing the outline and the setup suddenly looses is grip on the material. -
Did you sonic test It? Hopefully working on my stroker soon and trying to make some decisions. I was going to go for 89mm.
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Twin cam head for the L6 from Derek at Datsunworks
Derek replied to Derek's topic in Nissan L6 Forum
VCT bits and pieces. Trying to get all all the incidental parts done so that when I get my head back from Xtreme I can concentrate on the final push. I’m locating the VCT valve in a different position than I had originally planed. I was unable to plumb it the way I wanted and that forced me to look at other options. I always hated the idea of hanging the valve off of the front of the timing cover. The control circuit is a little longer but I’m willing to take a chance for the sake of better looks. Original 3D design: Finished product: It will hang below intake #1 and will be mostly out of sight. Made the CPS mount for the back of the valve cover. This required a pretty major rework of the fuel distribution block and a new mounting bracket. I got really lucky with the block in that I didn’t need to start from scratch. Tight fit! It only took two versions of the CPS plate and fuel block brackets and one version of the VCT valve bracket. I must be getting the hang of this:) Things should be picking up speed since the only thing holding me up is having the head back. -
88mm bore L28 is 2.883L according to the OZDAT calculator. You would have to take it to 90MM to get to 3.0 and at that point the walls would probably be a little on the thin side.
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Twin cam head for the L6 from Derek at Datsunworks
Derek replied to Derek's topic in Nissan L6 Forum
Everything except for the castings can be made by a competent machinist. Because of that I wanted to make sure that people were not forced into buying stuff they won't use. Case in point, Rebello has his own timing chain setup that he want's to see if he can incorporate into the head. I sold him blank plates for the idler and the upper tensioner. They have a milling machine in house and will modify the plates accordingly. Les Collins Racing have their own idea of how it should be and so on. Robbie of Whitley Tune in New Zealand will at some point be offering cams. I don't see any of this as a problem since people like Robbie, Les and Dave bring so much to the table and truth be told they have all been giving me feedback during the process. Especially Robbie. He has been my main sounding board for all things camshaft and VCT. I'll still be offering cams but I have no problem with other people offering them as well.