# Heads **URL:** \ **Category:** Shift518 Automotive\ **Created:** [March 29, 2009, 11:15am UTC](https://forums.speedlife.net/t/heads/243145 "2009-03-29T11:15:25Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![PJB](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/pjb/32/6389_2.png) [@PJB](https://forums.speedlife.net/u/PJB)\ **Post date:** [March 29, 2009, 11:15am UTC](https://forums.speedlife.net/t/heads/243145/1 "2009-03-29T11:15:25Z")
Can 60-62cc heads be machined down to 58cc? If so whats involved and how much would it cost? I really want 58cc heads to keep the compression up but most that Im finding are 62cc. With 58cc heads the compression will be 10.4:1. With 62cc heads it drops to 10:1. ---
**Author:** ![88slowmarro](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/88slowmarro/32/6339_2.png) [@88slowmarro](https://forums.speedlife.net/u/88slowmarro)\ **Post date:** [March 29, 2009, 11:17am UTC](https://forums.speedlife.net/t/heads/243145/2 "2009-03-29T11:17:18Z")
run the fuckin heard 10.1 is all ya want for the street on pump gas ---
**Author:** ![94Gt5.0](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/94gt5.0/32/6377_2.png) [@94Gt5.0](https://forums.speedlife.net/u/94Gt5.0)\ **Post date:** [March 29, 2009, 11:17am UTC](https://forums.speedlife.net/t/heads/243145/3 "2009-03-29T11:17:59Z")
Yes, you just have the heads decked at hunts, prolly a couple hundred or less ---
**Author:** ![PJB](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/pjb/32/6389_2.png) [@PJB](https://forums.speedlife.net/u/PJB)\ **Post date:** [March 29, 2009, 11:19am UTC](https://forums.speedlife.net/t/heads/243145/4 "2009-03-29T11:19:45Z")
I want a little higher compression because Im not spraying or boosting it. Will decking them affect much? I dont want the valves hitting the pistons again. ---
**Author:** ![88slowmarro](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/88slowmarro/32/6339_2.png) [@88slowmarro](https://forums.speedlife.net/u/88slowmarro)\ **Post date:** [March 29, 2009, 11:20am UTC](https://forums.speedlife.net/t/heads/243145/5 "2009-03-29T11:20:45Z")
not a huge diff in 10.4 and 10.1 just a little timing and im sure ya wont notice it paul ---
**Author:** ![tdi\_logik](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/tdi_logik/32/6310_2.png) [@tdi\_logik](https://forums.speedlife.net/u/tdi_logik)\ **Post date:** [March 29, 2009, 11:20am UTC](https://forums.speedlife.net/t/heads/243145/6 "2009-03-29T11:20:46Z")
your always makin a big stink and makin it harder on yourself. get the heads, bolt em up and go. ---
**Author:** ![Mk4\_30R\_Ban](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/mk4_30r_ban/32/6347_2.png) [@Mk4\_30R\_Ban](https://forums.speedlife.net/u/Mk4_30R_Ban)\ **Post date:** [March 29, 2009, 11:22am UTC](https://forums.speedlife.net/t/heads/243145/7 "2009-03-29T11:22:35Z")
> [@so i found a dog...](https://forums.speedlife.net/t/so-i-found-a-dog/16343/33): > > your always makin a big stink and makin it harder on yourself. get the heads, bolt em up and go. oh man, and this is coming from petard… paul you better do work FAST. ---
**Author:** ![PJB](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/pjb/32/6389_2.png) [@PJB](https://forums.speedlife.net/u/PJB)\ **Post date:** [March 29, 2009, 11:24am UTC](https://forums.speedlife.net/t/heads/243145/8 "2009-03-29T11:24:55Z")
I just want to get the right shit this time around. I dont want mismatched parts like before. I just found this: 58cc 60cc 64cc 4cc Flat Top10.7:110.4:110.0:1 ---
**Author:** ![PJB](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/pjb/32/6389_2.png) [@PJB](https://forums.speedlife.net/u/PJB)\ **Post date:** [March 29, 2009, 11:26am UTC](https://forums.speedlife.net/t/heads/243145/9 "2009-03-29T11:26:30Z")
> [@Mk4 30R"](#): > > oh man, and this is coming from petard… > > paul you better do work FAST. Im trying to. Ive got a little motivation again but I need heads. Cam isnt a big deal because Ill just buy an off the shelf Comp (fuck custom shit) but Ive got a budget for heads. I need 58cc heads with 3/8" studs for rockers since Ive got good rockers now. ---
**Author:** ![94Gt5.0](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/94gt5.0/32/6377_2.png) [@94Gt5.0](https://forums.speedlife.net/u/94Gt5.0)\ **Post date:** [March 29, 2009, 11:26am UTC](https://forums.speedlife.net/t/heads/243145/10 "2009-03-29T11:26:31Z")
You’ll have to check PTVC once the heads are on, no just slapping them on. Id call teh Co. you got the shortblock from and ask them about the PTVC with different heads, they should lead you in the right direction. ---
**Author:** ![94Gt5.0](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/94gt5.0/32/6377_2.png) [@94Gt5.0](https://forums.speedlife.net/u/94Gt5.0)\ **Post date:** [March 29, 2009, 11:27am UTC](https://forums.speedlife.net/t/heads/243145/11 "2009-03-29T11:27:04Z")
> [@so i found a dog...](https://forums.speedlife.net/t/so-i-found-a-dog/16343/35): > > Im trying to. Ive got a little motivation again but I need heads. Cam isnt a big deal because Ill just buy an off the shelf Comp (fuck custom shit) but Ive got a budget for heads. > > I need 58cc heads with 3/8" studs for rockers since Ive got good rockers now. You HAD good rockers, Harland Sharpes are tits! ---
**Author:** ![PJB](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/pjb/32/6389_2.png) [@PJB](https://forums.speedlife.net/u/PJB)\ **Post date:** [March 29, 2009, 11:29am UTC](https://forums.speedlife.net/t/heads/243145/12 "2009-03-29T11:29:25Z")
> [@so i found a dog...](https://forums.speedlife.net/t/so-i-found-a-dog/16343/36): > > You’ll have to check PTVC once the heads are on, no just slapping them on. Id call teh Co. you got the shortblock from and ask them about the PTVC with different heads, they should lead you in the right direction. with those idiots theyll tell me somebody stole their computer and they cant check anything. And what can be done with clearance after I bought everything? Would I be as fucked as the last time? > [@NY Zero Tolerance Speeding?](https://forums.speedlife.net/t/ny-zero-tolerance-speeding/16316/45): > > You HAD good rockers, Harland Sharpes are tits! No, I HAVE good rockers. I never sold them. ---
**Author:** ![94Gt5.0](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/94gt5.0/32/6377_2.png) [@94Gt5.0](https://forums.speedlife.net/u/94Gt5.0)\ **Post date:** [March 29, 2009, 11:30am UTC](https://forums.speedlife.net/t/heads/243145/13 "2009-03-29T11:30:06Z")
> [@BAAHHHH!!! Pissed about a car](https://forums.speedlife.net/t/baahhhh-pissed-about-a-car/16346/5): > > No, I HAVE good rockers. I never sold them. Oh ok, good lol ---
**Author:** ![TurboTravis](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/turbotravis/32/6406_2.png) [@TurboTravis](https://forums.speedlife.net/u/TurboTravis)\ **Post date:** [March 29, 2009, 4:45pm UTC](https://forums.speedlife.net/t/heads/243145/14 "2009-03-29T16:45:42Z")
Checking the PTV clearance on your engine will be fairly easy on an engine stand. Basically, all you do is assemble the engine with very lightweight valve springs on the #1 cylinder, rotate the engine by hand, and check the valve clearance at the tightest spot on each valve with a dial indicator. You can easily replace the valve springs with the originals by filling the cylinder with compressed air on TDC of the compression stroke. Clay=junk, don’t let anyone con you into doing it that ‘dark’ way. ---
**Author:** ![TurboTravis](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/turbotravis/32/6406_2.png) [@TurboTravis](https://forums.speedlife.net/u/TurboTravis)\ **Post date:** [March 29, 2009, 4:46pm UTC](https://forums.speedlife.net/t/heads/243145/15 "2009-03-29T16:46:55Z")
Oh, and I would not bother worrying about .4 compression points. Put the money into something else. ---
**Author:** ![PJB](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/pjb/32/6389_2.png) [@PJB](https://forums.speedlife.net/u/PJB)\ **Post date:** [March 29, 2009, 5:51pm UTC](https://forums.speedlife.net/t/heads/243145/16 "2009-03-29T17:51:49Z")
I found a good deal on a set of new Canfield heads but Im waiting to find out what size the rocker studs are. Theyre 54cc so the compression will be even higher. What happens if I buy heads and a cam and the ptvc isnt right? ---
**Author:** ![TurboTravis](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/turbotravis/32/6406_2.png) [@TurboTravis](https://forums.speedlife.net/u/TurboTravis)\ **Post date:** [March 29, 2009, 6:07pm UTC](https://forums.speedlife.net/t/heads/243145/17 "2009-03-29T18:07:25Z")
> [@The new Muscle Car Wars begin](https://forums.speedlife.net/t/the-new-muscle-car-wars-begin/16354/21): > > I found a good deal on a set of new Canfield heads but Im waiting to find out what size the rocker studs are. Theyre 54cc so the compression will be even higher. > > What happens if I buy heads and a cam and the ptvc isnt right? Thicker head gasket, and/or flycut/change pistons. As I recall you want .080 on the intake side and .100 on the exhaust side, min. A good engine builder can give you a close estimate on your PTV clearance with cam/block/head/etc specs. ---
**Author:** ![Mk4\_30R\_Ban](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/mk4_30r_ban/32/6347_2.png) [@Mk4\_30R\_Ban](https://forums.speedlife.net/u/Mk4_30R_Ban)\ **Post date:** [March 29, 2009, 11:38pm UTC](https://forums.speedlife.net/t/heads/243145/18 "2009-03-29T23:38:55Z")
> [@The new Muscle Car Wars begin](https://forums.speedlife.net/t/the-new-muscle-car-wars-begin/16354/23): > > Thicker head gasket, and/or flycut/change pistons. > > As I recall you want .080 on the intake side and .100 on the exhaust side, min. > > A good engine builder can give you a close estimate on your PTV clearance with cam/block/head/etc specs. :thumbup ---
**Author:** ![PJB](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/pjb/32/6389_2.png) [@PJB](https://forums.speedlife.net/u/PJB)\ **Post date:** [March 30, 2009, 1:15am UTC](https://forums.speedlife.net/t/heads/243145/19 "2009-03-30T01:15:12Z")
I definately hope I wouldnt have to change pistons or cut them. Theyre brand new Probe flat tops. So what do you think of Canfield heads with 54cc chambers? Is that too much? Theyre $1050 shipped and new in the box. ---
**Author:** ![plaf713](https://avatars.discourse-cdn.com/v4/letter/p/439d5e/32.png) [@plaf713](https://forums.speedlife.net/u/plaf713)\ **Post date:** [March 30, 2009, 2:00pm UTC](https://forums.speedlife.net/t/heads/243145/20 "2009-03-30T14:00:34Z")
if you have bad ptvc wouldnt the motor not turn over all the way? or atleast give you a hard time? [Next page](https://forums.speedlife.net/t/heads/243145.md?page=2)