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Author Topic: Best GX390 Dual Valve Springs  (Read 3514 times)
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cubcadet70
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« on: February 23, 2013, 12:00:09 PM »

Whats the best dual valve springs for the GX390 on the market? I was thinking about a set of comp cams JR dragster 550 springs. But I was looking for some really good ones.
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Ron Atchison/A.C.E. Race Engines
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« Reply #1 on: March 09, 2013, 06:35:59 AM »

the comp 965 is the spring you want.
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cubcadet70
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« Reply #2 on: March 09, 2013, 10:26:02 AM »

I'm getting the comp cam 966-2 springs. Their the .600" lift springs. Put 966-2 in the search bar on comp cams website. They will pop up.
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« Reply #2 on: March 09, 2013, 10:26:02 AM »

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Ron Atchison/A.C.E. Race Engines
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« Reply #3 on: March 10, 2013, 08:29:50 AM »

Really, i should of not gave you that answer. I was just thinking of a good spring recommendation for a nice 390/420 average build. To give an accurate suggestion it depends on rpm, cam and valvetrain weight used. The 966 is a bit more harder on valvetrain and cost a litttle power if your not planning on running over .500 lift at the valve and trying to turn engine 8k+. With stainless 1.5" intake, .475 lift @ valve, roller rockers, and lightweight moly pushrods 7500 rpm is not a problem with a properly setup 965. Comp uses the Pacaloy material on their 965 and doesn't on the 966 and that is really why the 965 was my first answer in reference to to your question asking about "really good ones", i was thinking quality.
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cubcadet70
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« Reply #4 on: March 10, 2013, 09:59:26 AM »

I see. Maybe the 965 will work then. Thanks for the info!
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vegascarts
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« Reply #5 on: May 22, 2013, 11:59:08 AM »

Try these out! They are identical to the Comp 965 other than being Nickel plated and slightly more seat pressure (Cant beat the price either) :

http://vegascarts.com/webstore/index.php?main_page=product_info&cPath=8_11&products_id=1079
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cubcadet70
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« Reply #6 on: May 22, 2013, 06:09:14 PM »

What's the OD and ID on the springs?
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Darkviper
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« Reply #7 on: May 23, 2013, 04:53:55 AM »

Im running vegascarts comp 55lb dual springs and i think they will be really good underload i mean shoot it was pain in the butt to put the retainers on lol. Just remember any springs you get from where ever from what iv seen and herd they will get worn out and you should get new ones every year.
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Jonathon Kaup
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cubcadet70
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« Reply #8 on: May 23, 2013, 03:28:11 PM »

Yeah I will definely replace it often. Also will need to know the cool bind and specs on the Vegas Carts dual valve springs.
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Darkviper
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« Reply #9 on: May 24, 2013, 04:42:06 AM »

Heres what i fond about it under the OEM the duel ones 55lbs is what i got and what you should get the specs is on the stock OEM springs heres the link http://vegascarts.com/webstore/index.php?main_page=product_info&cPath=8_11&products_id=1041. Here the ones i got and you should get if you are running agressive cam and parts http://vegascarts.com/webstore/index.php?main_page=product_info&cPath=8_11&products_id=1042 thats what i recommend.
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Jonathon Kaup
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« Reply #10 on: May 25, 2013, 02:54:37 PM »

I just left the office, but Ill post the exact pressure /lift numbers tomorrow or monday on the site.
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-Geoff Warner
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