VK Swap Discussion...

guitaraholic · 05-17-2013, 09:03 AM

Quote:

Originally Posted by IDZRVIT

Be more creative! Sniped this from a corvette forum. Two LS blocks welded together for a V12, 8.9L. Guess what the plans are for a transplant? A 240Z!!!

Man Creates 8.9 Liter V12 LS Engine - Corvette Forum

PPPSSTTT, check my post on GT40s.com,,, I found that weeks ago,, where have you been...lol

IDZRVIT · 05-18-2013, 07:15 AM

Quote:

Originally Posted by guitaraholic

PPPSSTTT, check my post on GT40s.com,,, I found that weeks ago,, where have you been...lol

In hibernation for the Canadian winter. I just woke up.

Megan370z · 05-18-2013, 08:32 AM

Quote:

Originally Posted by guitaraholic

The VVEL ranges from 0 - 280 degrees of cam timing, and if you tweak the "magic screw" you can get 300 degrees with 12.5mm of lift, which is more than enough to feed it to 9000rpm if that is your hearts desire.

since the VVEL control the openning of the valve, adjusting this *magic screw* also move the minimum valve opening.
I say the valve will not fully close if you want that 300 duration *we are talking about thousand of an inch here*
this is probably why Nissan does not want anybody to play with those screw.

I should test it with my spare VVEL head

edit; after thinking about the problem ,, it could be fixed with a different thickness of valve lifter. so yeah that 300duration could be possible as per what JWT discovered.

guitaraholic · 05-18-2013, 09:19 AM

Even if it doesn't close all the way, I highly doubt you will need it closed anyways if you are going to muck with it much.

I am thinking about using a standard throttle body and controlling the VVEL stepping motor in relation to RPM/throttle. It's going in a supercar, so, I don't really worry about the pumping loss from the throttle body.

I can't image needing the valves closed all the way, all the time, unless you wanted to do cylinder deactivation on one bank, but on a cross-planed V8, it would make for some very uneven firing.

IDZRVIT · 05-19-2013, 07:31 AM

The valve must close in order to build cylinder pressure.

G37Sam · 05-19-2013, 08:37 AM

Are you scrapping your current project? What's the latest update on it?

guitaraholic · 05-19-2013, 10:09 PM

The valve close all the way, when adjusted. What I meant was, they might not "stay" closed, as in 0 duration. It shows in the video, even with the full adjustment, the valve closes.

05-19-2013, 07:31 AM	#50 (permalink)
IDZRVIT A True Z Fanatic Join Date: May 2009 Location: Halifax Posts: 1,659 Drives: '13 CTS-V, '76 Vette Rep Power: 26	The valve must close in order to build cylinder pressure. __________________ "America.... still builds rockets!" Vette: 355 cid, 400 rwhp '13 CTS-V Coupe: 6.2L LSA, 556HP

05-19-2013, 08:37 AM	#51 (permalink)
G37Sam A True Z Fanatic Join Date: Dec 2008 Location: Dubai, UAE Posts: 1,507 Drives: RB'd G37 Rep Power: 20	Are you scrapping your current project? What's the latest update on it? __________________ '14 Viper GTS '08 RB'd G37S - Sold

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05-18-2013, 09:19 AM	#49 (permalink)
guitaraholic Base Member Join Date: May 2013 Location: Tampa Posts: 8 Drives: 240sx SL-C Rep Power: 11	Even if it doesn't close all the way, I highly doubt you will need it closed anyways if you are going to muck with it much. I am thinking about using a standard throttle body and controlling the VVEL stepping motor in relation to RPM/throttle. It's going in a supercar, so, I don't really worry about the pumping loss from the throttle body. I can't image needing the valves closed all the way, all the time, unless you wanted to do cylinder deactivation on one bank, but on a cross-planed V8, it would make for some very uneven firing.

05-19-2013, 10:09 PM	#52 (permalink)
guitaraholic Base Member Join Date: May 2013 Location: Tampa Posts: 8 Drives: 240sx SL-C Rep Power: 11	The valve close all the way, when adjusted. What I meant was, they might not "stay" closed, as in 0 duration. It shows in the video, even with the full adjustment, the valve closes.