RYU's "properly molested" NSX build thread
- Thread starter RYU
- Start date
I just want to say i'm really glad I took the build approach I did with this motor. I took the time to learn my ECU. I helped to develop the ITBs on a bone stock motor and now installing new coils on the same bone stock motor. This will really help me isolate any problems that come up when the 3.6L goes in. I can only imagine with kind of an impossible mess things would be troubleshooting the issues I've overcome if I was trying to do this on top of a built engine.
Latest update was installing "Audi R8" Denso ignition coils. These are the typical - lighter, faster, stronger coils. Chris [MENTION=26916]foundry3[/MENTION] put together a very well done wire harness and supplied the coils for me. Thanks Chris! The coils at the base of the igniter need a slight bit of trimming which i'm not going to share yet because I might modify them again. For now they seem to work quite well with the HKS F-Con Vpro ECU.
Denso Coils and Harness from Foundry3. [MENTION=20830]A.S. Motorsport[/MENTION]s also sells a similar set but I believe Adnan's are from Bosch. I'm not exactly sure of the differences but they look identical.
Here's the Dwell table for the new coils and the conversion I had to do for the HKS inputs. Ask me if this doesn't make sense to you.
https://youtu.be/kXMjDbVSLjU
How do you guys read this plug? I have about 2-3k miles on these and have been my plugs for the duration of the ITB development. The car has leaned out a bit during the last 500 miles as i've been optimizing the maps but this plug still look rich around the edges. The spark element looks good so i'm guessing the carbon (rich) buildup around the edges was from me starting off very rich in the tune for safety. Does this look rich to you guys? I work off the numbers my data logger presents.. I'm not one for reading the Tea Leaves of spark plugs.
Here's a startup video on the new coils
https://youtu.be/bvvXnn4e_28
Some throttle blips for fun
https://youtu.be/6VQfJaZKPjk
Latest update was installing "Audi R8" Denso ignition coils. These are the typical - lighter, faster, stronger coils. Chris [MENTION=26916]foundry3[/MENTION] put together a very well done wire harness and supplied the coils for me. Thanks Chris! The coils at the base of the igniter need a slight bit of trimming which i'm not going to share yet because I might modify them again. For now they seem to work quite well with the HKS F-Con Vpro ECU.
Denso Coils and Harness from Foundry3. [MENTION=20830]A.S. Motorsport[/MENTION]s also sells a similar set but I believe Adnan's are from Bosch. I'm not exactly sure of the differences but they look identical.
Here's the Dwell table for the new coils and the conversion I had to do for the HKS inputs. Ask me if this doesn't make sense to you.
https://youtu.be/kXMjDbVSLjU
How do you guys read this plug? I have about 2-3k miles on these and have been my plugs for the duration of the ITB development. The car has leaned out a bit during the last 500 miles as i've been optimizing the maps but this plug still look rich around the edges. The spark element looks good so i'm guessing the carbon (rich) buildup around the edges was from me starting off very rich in the tune for safety. Does this look rich to you guys? I work off the numbers my data logger presents.. I'm not one for reading the Tea Leaves of spark plugs.
Here's a startup video on the new coils
https://youtu.be/bvvXnn4e_28
Some throttle blips for fun
https://youtu.be/6VQfJaZKPjk
How do the new coils mount to the valve cover?
I can confirm the placebo effect is strong with this one!
I'm not sure I'll leave it as it is. It's good enough for now and I feel fairly safe with it but didn't have much time to fabricate a solution I was happy with. It's essentially a firm press fit that's held in place by the plastic cover and a detent style clip that fastens the coil to the sparkplug. I'll look for some standoff brackets that bolt into the OEM location. That seems to be the most ideal. I'll grab a set of factory valve covers to make them properly.
I also had to clearance the base rubber gasket of the coils to fit into the valve cover orifice.
For anyone considering running these coils. Here are some useful parameters. https://www.hpacademy.com/forum/general-tuning-discussion/show/audi-r8-ignition-coil-dwell-settings
I'm running mine at 1.6 milliseconds. Someone here runs them at 1.9ms. the article above claims you can run up to 2.6-2.8ms but they draw a ton of amperage at that level. It's nice to have that option though.
I'm running mine at 1.6 milliseconds. Someone here runs them at 1.9ms. the article above claims you can run up to 2.6-2.8ms but they draw a ton of amperage at that level. It's nice to have that option though.
To the 3 of us that still read this thread here's a WIP picture. It will look more buttoned up than this when all done especially that engine bay cover.
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I'm the fourth person still reading this and i see no picture either. Or because of advancing age, neither docjon or myself can see it?
oopsies... I think I fixed the problem. lmk
I still can't see the photos 
Let's try this...?
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I just updated the link again. Normally i'm able to check Google Photo sharing in an Incognito window. All the times i've checked, they've shown up. Weird.. this use to be a foolproof method.
you're almost right [MENTION=4282]docjohn[/MENTION]! Coming from a CTSC it's more like Wild and Sexy go SLOW parts haha
I've come to the conclusion that to have ITBs on this car you have to ditch the factory engine cover. There's just no way to get enough volume in the plenum. Even at this height I'm already sacrificing some performance with the plenum vs. open trumpets however it's all a balancing act. this is a street car and I do not want it to look like a hack job. I built this plenum to be able to take it off for track days or special occassions but also be able to adjust the plenum size bigger or smaller by up to 0-45%. It's going to take some time to figure out where that sweet spot will be especially with the 3.6L. The way it is now is the lowest height and lowest volume setting.
Yes, in concept my air filter solution will sort of be like RFY's and Comptech's, but mine will flow like 5x more air (it has to because of ITBs). Whereby the side duct and side gas fill tube opening directly fills the baffled air chamber (where the filters are) with positive air pressure at speed. This benefit will not show up on the dyno unfortunately. It's also coming into winter soon so I won't really need to do that project anytime soon. Busy at work!
Yes, in concept my air filter solution will sort of be like RFY's and Comptech's, but mine will flow like 5x more air (it has to because of ITBs). Whereby the side duct and side gas fill tube opening directly fills the baffled air chamber (where the filters are) with positive air pressure at speed. This benefit will not show up on the dyno unfortunately. It's also coming into winter soon so I won't really need to do that project anytime soon. Busy at work!
I'm really excited to see the airbox! Ideally, it would be good (and somewhat OEM-looking) if you can integrate the factory airbox and filter system. It should flow enough for the ITB system- there is an integrated velocity stack inside the airbox. You could always enlarge that opening with a larger stack...
