GX390/Predator420/VC460 timing key question

chrisr32 · 07-11-2019, 06:01 PM

Are the timing keys for the GX390 the same as the GX200? On the NR site, they seem to be the same "Key, Timing, Offset, GX Hondas, 6.5 to 15 hp Chinese OHV, & Predator" but everywhere else it seems they only list them for GX200 and other 6.5 clones.

http://www.nrracing.com/product-p/nrkey.htm

raydhd · 07-11-2019, 07:36 PM

The heavier big block flywheel have a much greater tendency to shear the timing key. The off set keys have much less material strength due the machining.Hence most racing outlets recommend other means to manage timing advances. The early 440&460"s came with a stock and advance timing keys. In fact since I never pulled the flywheel off I don't know which timing key is installed in my 2014 VC assembled engine.

slonomo · 07-12-2019, 07:04 AM

Every time I put an offset key on my 440/460 it would shear. In fact, I think that's why it stopped running this last time, it was frustrating. I lapped the crank and flywheel, new nut, and impact to tighten it. It seems like it happens on decel with a backfire.

Shepard · 07-13-2019, 09:12 PM

You would be better off trying this if you want to advance your timing.

https://vegascarts.com/products/11-d...timing-bracket

chrisr32 · 07-14-2019, 08:31 AM

I have bought and installed the Vegas timing bracket, but have not ran the engine yet. I was just curious about the timing key differences.

chrisr32 · 07-19-2019, 07:52 AM

The timing bracket from VC seems to work ok. Currently have it set to 6 degrees advance.

https://drive.google.com/file/d/1DRz...w2Yx-TSF_/view

07-11-2019, 06:01 PM	#1
chrisr32 Gone Wild Join Date: Jan 2019 Posts: 190	GX390/Predator420/VC460 timing key question Are the timing keys for the GX390 the same as the GX200? On the NR site, they seem to be the same "Key, Timing, Offset, GX Hondas, 6.5 to 15 hp Chinese OHV, & Predator" but everywhere else it seems they only list them for GX200 and other 6.5 clones. http://www.nrracing.com/product-p/nrkey.htm
chrisr32 Gone Wild Join Date: Jan 2019 Posts: 190

07-11-2019, 07:36 PM	#2
raydhd VC 460 CLONE GONE WILD Join Date: Oct 2014 Location: Ray BY The Bay NJ Posts: 10,633	Re: GX390/Predator420/VC460 timing key question The heavier big block flywheel have a much greater tendency to shear the timing key. The off set keys have much less material strength due the machining.Hence most racing outlets recommend other means to manage timing advances. The early 440&460"s came with a stock and advance timing keys. In fact since I never pulled the flywheel off I don't know which timing key is installed in my 2014 VC assembled engine.

07-12-2019, 07:04 AM	#3
slonomo Searching for The Way Join Date: Oct 2009 Location: Medina, Ohio (NEOHIO) Posts: 11,436	Re: GX390/Predator420/VC460 timing key question Every time I put an offset key on my 440/460 it would shear. In fact, I think that's why it stopped running this last time, it was frustrating. I lapped the crank and flywheel, new nut, and impact to tighten it. It seems like it happens on decel with a backfire.

07-13-2019, 09:12 PM	#4
Shepard Crazy Ole Man Join Date: Jan 2016 Location: Owego NY Posts: 2,758	Re: GX390/Predator420/VC460 timing key question You would be better off trying this if you want to advance your timing. https://vegascarts.com/products/11-d...timing-bracket

07-14-2019, 08:31 AM	#5
chrisr32 Gone Wild Join Date: Jan 2019 Posts: 190	Re: GX390/Predator420/VC460 timing key question I have bought and installed the Vegas timing bracket, but have not ran the engine yet. I was just curious about the timing key differences.
chrisr32 Gone Wild Join Date: Jan 2019 Posts: 190

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07-19-2019, 07:52 AM	#6
chrisr32 Gone Wild Join Date: Jan 2019 Posts: 190	Re: GX390/Predator420/VC460 timing key question The timing bracket from VC seems to work ok. Currently have it set to 6 degrees advance. https://drive.google.com/file/d/1DRz...w2Yx-TSF_/view
chrisr32 Gone Wild Join Date: Jan 2019 Posts: 190

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