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317 heads + 15 psi = o-ring?

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Old Nov 9, 2010 | 02:12 PM
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Default 317 heads + 15 psi = o-ring?
Hey guys

If i want to run stock 317 heads over 15 psi boost, will o-ringing the block provide adequate clamping? Dont really want to pop for new heads now, but o-ringing the block seems cheap enough.... id like 800 motor hp now, but may want to increase later...

thoughts?
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Old Nov 9, 2010 | 03:24 PM
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I run 16# using just LS7 gaskets and have had no problems.
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Old Nov 9, 2010 | 03:45 PM
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ive read a few posts where guys seem to get away with higher boost. But, i was just wondering if the o-ring procedure is a "gaurantee" that id be able to run more than 15...

thanks
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Old Nov 9, 2010 | 04:27 PM
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Nothing is a "guarantee" in this game. For 800 flywheel horse, oringing shouldn't be necessary with a good tune. Several people here run up to 20lbs with just good gaskets and ARP studs. Oringing does help as the boost pressures go up, but for your goals you should be fine without it.
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Old Nov 9, 2010 | 04:53 PM
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i figure its fairly easy and cheap before the engine gets put together... if i want to turn it up to 1000+ hp later, id rather not have to pull it all apart again....

thanks
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Old Nov 9, 2010 | 05:04 PM
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I would say go for it. That is if the car isn't your DD (more time for the car to be off the road for the oring process) and you have the extra money for it. The extra insurance to protect as much as you can will give you peace of mind.
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Old Nov 9, 2010 | 06:16 PM
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i use the ls3 head gaskets and have ran 20psi with an st80 and havent had problems. if i were to do it again i would use the ls9 head gaskets.
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Old Nov 9, 2010 | 06:18 PM
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Stock MLS gaskets, drill out rivets, coat each layer in Hylomar, tq studs to 100lbs, done.
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Old Nov 9, 2010 | 06:29 PM
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oring just the block? or is it required to put the groove in the heads as well? id really rather not do the heads...

thanks!
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Old Nov 9, 2010 | 08:53 PM
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23psi here with 317's no issues thus far...
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Old Nov 9, 2010 | 10:11 PM
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Originally Posted by gregrob
Stock MLS gaskets, drill out rivets, coat each layer in Hylomar, tq studs to 100lbs, done.
doubt you would really even need to do that for 15psi. Didn't on my car or phil's. Ginn is using cometic, drill rivets, coated, and only torqued to 75 ft lbs far as I know.
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Old Nov 9, 2010 | 11:20 PM
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Originally Posted by jks67ss396
oring just the block? or is it required to put the groove in the heads as well? id really rather not do the heads...

thanks!
both are required from what I was told, give ERL a call
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Old Nov 9, 2010 | 11:23 PM
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317 heads, LS2 gaskets, ARP studs = 20psi with no issues.
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Old Nov 9, 2010 | 11:29 PM
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standard ARP studs and LS9 gaskets and 20 psi.... no problem
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Old Nov 9, 2010 | 11:29 PM
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Originally Posted by gregrob
Stock MLS gaskets, drill out rivets, coat each layer in Hylomar, tq studs to 100lbs, done.
i hope you are using L19 studs with that much torque.
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Old Nov 10, 2010 | 07:16 AM
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Originally Posted by Mr.Big
23psi here with 317's no issues thus far...
O-ringed? what gaskets? ???
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Old Nov 10, 2010 | 11:12 AM
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Originally Posted by pwrtrip75
O-ringed? what gaskets? ???
Not "O" ringed and just MLS gaskets with the high(er) dollar ARP studs (can't remember the number)
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Old Nov 10, 2010 | 07:36 PM
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Originally Posted by 9sec93
i hope you are using L19 studs with that much torque.
We used some off brand company's studs torqued to 100lbs on the nova I speak of. But Honestly I think they were crying when we did it. Did not feel solid.

I believe it takes that much torque to keep the heads down then one probably should be lookin at other options lol
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Old Nov 10, 2010 | 08:17 PM
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So what is everyone torqing there head studs to with LS9 gaskets. I just recently pushed a stock MLS gasket out with them torque to the ARP recommended torque......
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Old Nov 10, 2010 | 09:17 PM
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i think 90 lbs is good for tq
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