317 head ?'s
Thread Starter
Joined: Jun 2005
Posts: 5,221
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From: Skiatook, OK
317 head ?'s Ok, wasn't sure if this belonged in the engine section or here. These are goin on a motor I'm piecing together for a D1SC build so I figured I'd ask here.
I just picked up a set of stock 317 heads off a buddy. All stock valves included. They need to be cleaned up & I believe he said they had 70,xxx miles on them. I'm wanting to do as much of the work myself as possible but never tore a head down before.
What should I look for? I was originally thinking just take them all apart, clean them good with some degreaser, clean the valves all up & then order a Patroit Gold Dual spring kit w/tit. retainers to put back in them. But I wanted to make sure I didn't miss anything.
Are the Patroit Dual springs a good choice for this build? I'm currently running them on my H/C set-up but this build is different. The heads will be atop a 347 with EPP blower cam & the car will be daily driven. I have the pullies for the D1 already & will be running a 7.65" crank & 3.4" head unit incase anyone needs to know for spring choice. Is there another spring out there thats better for my needs or am I good with what I thought about buying?
I was also plannin on toppin them off with a set of stock rocker modified by HS. I heard of a couple failures with their upgrades but also heard they fixed the issue & it was only on the old version. Someone please inform me if I'm mistaken. I'd like to keep the stock rockers if possible. Unless someone has a steal of a deal on YT's, LOL.
Thankx a ton in advance for any help/info guys.
I just picked up a set of stock 317 heads off a buddy. All stock valves included. They need to be cleaned up & I believe he said they had 70,xxx miles on them. I'm wanting to do as much of the work myself as possible but never tore a head down before.
What should I look for? I was originally thinking just take them all apart, clean them good with some degreaser, clean the valves all up & then order a Patroit Gold Dual spring kit w/tit. retainers to put back in them. But I wanted to make sure I didn't miss anything.
Are the Patroit Dual springs a good choice for this build? I'm currently running them on my H/C set-up but this build is different. The heads will be atop a 347 with EPP blower cam & the car will be daily driven. I have the pullies for the D1 already & will be running a 7.65" crank & 3.4" head unit incase anyone needs to know for spring choice. Is there another spring out there thats better for my needs or am I good with what I thought about buying?
I was also plannin on toppin them off with a set of stock rocker modified by HS. I heard of a couple failures with their upgrades but also heard they fixed the issue & it was only on the old version. Someone please inform me if I'm mistaken. I'd like to keep the stock rockers if possible. Unless someone has a steal of a deal on YT's, LOL.
Thankx a ton in advance for any help/info guys.
8 sec potential, 12 sec slip
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From: Savannah, GA
317s with those springs should be fine with that setup man. I ran 035s (same as 317s) on my old 347 setup with no problems with the old P1SC and a 7.65/3.4 pulley combo.
Thread Starter
Joined: Jun 2005
Posts: 5,221
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From: Skiatook, OK
I was thinkin I might be fine but wasn't sure since the EPP cam is pretty healthy.
I just called Lucito's & they quoted me $26 per head to clean them up & make them look like new if I bring them in already disassembled. And their turn around is only 2 days.
What I'm kinda curious about is what to look for once they are disassembled. For instance I have never checked a valve guide or things like that, so I'm not really sure what to look for to ensure they are in perfect condition.
I just called Lucito's & they quoted me $26 per head to clean them up & make them look like new if I bring them in already disassembled. And their turn around is only 2 days.
What I'm kinda curious about is what to look for once they are disassembled. For instance I have never checked a valve guide or things like that, so I'm not really sure what to look for to ensure they are in perfect condition.
pressure test wil find cracks. also check guide clearnaces and valve stems if reusing stock valves.
recommend slight mill to flatten deck. .005 at least. if everything checks out.
also new vj with slight backcut on valve. will improve low to mid lift flow.
remove casting flash from ports and chamber. with cartridge rolls.
pretty basic step i take for all heads when i rebuild em.
recommend slight mill to flatten deck. .005 at least. if everything checks out.
also new vj with slight backcut on valve. will improve low to mid lift flow.
remove casting flash from ports and chamber. with cartridge rolls.
pretty basic step i take for all heads when i rebuild em.
I agree with NemeSS get the heads pressure tested and shaved just a bit. Also dont forget about getting new valve seals when the machine shop is checking the heads. Have the machine shop hot tank the valves for you too (if your reuseing)
Thread Starter
Joined: Jun 2005
Posts: 5,221
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From: Skiatook, OK
Cool. Thankx guys. Thats the kinda stuff I was wondering about. I'll call the machine shop & see if they can pressure test them for me while they are cleaning the castings up.
What are you doing for head gaskets and studs? Are you useing your stock bottom end or are you going forged?
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Thread Starter
Joined: Jun 2005
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From: Skiatook, OK
Well here is the plan:
I have a stock block I got from a buddy. Crank was fubar so I just bought a used stock crank from a 2000 LS1 in perfect condition. I'm goin ARP main studs with a line hone to make sure its all solid down there. I plan on running Compstar rods with Weisco pistons. And of coarse ARP head studs to clamp those 317 down. Not sure on head gasket yet. Havent made it that far. I have been reading the recent threads about the GM multi-layer gaskets.
I already have a Vic Jr with sheet metal elbow to go on top of the 317 heads. I'll be running my current Bo White worked over stock TB & plan on a EPP blower cam to finish it off. My exhaust will stay unchanged.
I'm hopin for around 550RWHP from the final combo. I'll be running a 7.65" crank pulley & 3.4" head unit pulley. So that number should be within reach I'd think.
Any opinions on my build plans? Forgot to mention I also plan on a Alky control kit for those hot summer days.
I have a stock block I got from a buddy. Crank was fubar so I just bought a used stock crank from a 2000 LS1 in perfect condition. I'm goin ARP main studs with a line hone to make sure its all solid down there. I plan on running Compstar rods with Weisco pistons. And of coarse ARP head studs to clamp those 317 down. Not sure on head gasket yet. Havent made it that far. I have been reading the recent threads about the GM multi-layer gaskets.
I already have a Vic Jr with sheet metal elbow to go on top of the 317 heads. I'll be running my current Bo White worked over stock TB & plan on a EPP blower cam to finish it off. My exhaust will stay unchanged.
I'm hopin for around 550RWHP from the final combo. I'll be running a 7.65" crank pulley & 3.4" head unit pulley. So that number should be within reach I'd think.
Any opinions on my build plans? Forgot to mention I also plan on a Alky control kit for those hot summer days.
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Verdad Gallardo Well here is the plan:
I have a stock block I got from a buddy. Crank was fubar so I just bought a used stock crank from a 2000 LS1 in perfect condition. I'm goin ARP main studs with a line hone to make sure its all solid down there. I plan on running Compstar rods with Weisco pistons. And of coarse ARP head studs to clamp those 317 down. Not sure on head gasket yet. Havent made it that far. I have been reading the recent threads about the GM multi-layer gaskets.
I already have a Vic Jr with sheet metal elbow to go on top of the 317 heads. I'll be running my current Bo White worked over stock TB & plan on a EPP blower cam to finish it off. My exhaust will stay unchanged.
I'm hopin for around 550RWHP from the final combo. I'll be running a 7.65" crank pulley & 3.4" head unit pulley. So that number should be within reach I'd think.
Any opinions on my build plans? Forgot to mention I also plan on a Alky control kit for those hot summer days.
I have a stock block I got from a buddy. Crank was fubar so I just bought a used stock crank from a 2000 LS1 in perfect condition. I'm goin ARP main studs with a line hone to make sure its all solid down there. I plan on running Compstar rods with Weisco pistons. And of coarse ARP head studs to clamp those 317 down. Not sure on head gasket yet. Havent made it that far. I have been reading the recent threads about the GM multi-layer gaskets.
I already have a Vic Jr with sheet metal elbow to go on top of the 317 heads. I'll be running my current Bo White worked over stock TB & plan on a EPP blower cam to finish it off. My exhaust will stay unchanged.
I'm hopin for around 550RWHP from the final combo. I'll be running a 7.65" crank pulley & 3.4" head unit pulley. So that number should be within reach I'd think.
Any opinions on my build plans? Forgot to mention I also plan on a Alky control kit for those hot summer days.
Thread Starter
Joined: Jun 2005
Posts: 5,221
Likes: 1
From: Skiatook, OK
Yea, I was hopin for around 12-15# boost depending on how much I lose across the FMIC. I consider myself lucky to have ChevyChad within 15 minutes from me to help me trouble shoot anything I might run into as well.
The block will get the full treatment. Honed to a 3.905" bore, decked, line honed & all cleaned up. If I remember correctly the machine shop quoted me $500 for the machine work.
The block will get the full treatment. Honed to a 3.905" bore, decked, line honed & all cleaned up. If I remember correctly the machine shop quoted me $500 for the machine work.
****! you're hoping for 550? I'd be prepared to far exceed that number with that combo, it'll make that by 4000rpm. I'm betting you're closer to 650-700 if you end up in that 14-15psi range.
Thread Starter
Joined: Jun 2005
Posts: 5,221
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From: Skiatook, OK
This is very true as well. I pretty much know what to expect out of it from researching others combos & dyno charts, so if I see some really low numbers I'll know something needs to be changed. But since different dynos read different I dont wanna get hung up on hitting a certain number. If the graph looks great, car runs great & lays down a solid E.T. I could care less what the dyno says its makin, LOL.
I know Rickys S/C Z28's car made some good power & laid down a solid E.T. on his 347/D1 combo & I believe he was on a 3.7 pulley. Since I'll be on a 3.4 I'm expecting a little more HP out of it & similar E.T's. Mid 10's potiential in my daily driver is plenty for me.
I know Rickys S/C Z28's car made some good power & laid down a solid E.T. on his 347/D1 combo & I believe he was on a 3.7 pulley. Since I'll be on a 3.4 I'm expecting a little more HP out of it & similar E.T's. Mid 10's potiential in my daily driver is plenty for me.
8 sec potential, 12 sec slip
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From: Savannah, GA
Mike, you do realize that I made 632 with a nearly identical 347 combo, except I had a P1SC with 7.65/3.4 pulleys right? I also had a smaller cam than the one you will be using... You will easily be 100 or more rwhp over your goal with a D1SC. If I were you, I would start out with a 4.0 or 3.7 pulley. That will put you in the 550-600rwhp range with that combo and give you room to grow in the future once you get used to the new found power and used to the boosted world.
Thread Starter
Joined: Jun 2005
Posts: 5,221
Likes: 1
From: Skiatook, OK
Aww man, I didn't want to buy a bigger pulley, LOL. I'd be happy to hit the numbers you did Chad, if I exceed them I'll be very pleased with the build. I'm ready for a monster, this current combo has lost it's amusement. Granted its a solid combo even untuned & is still a damn nice driver, but needs more *****.
