Has anyone used “Proheader” casting heads?
Thread Starter
Joined: May 2011
Posts: 8,478
Likes: 1,022
From: Wichita, KS
Has anyone used “Proheader” casting heads? Has anyone used “Proheader” casting heads?
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I cleaned up a set of 243’s and I figure by the time I mill them and install a decent set of springs on them... I’d be into these heads for more than these which claim pretty good flow numbers and have SS valves. Are these similar to (if not the same) as the procomps everyone hates? Or are these something different? I spoke to the seller and he said they have a .450 deck on them as well.
Non-Sponsor Soliciting Policy
I cleaned up a set of 243’s and I figure by the time I mill them and install a decent set of springs on them... I’d be into these heads for more than these which claim pretty good flow numbers and have SS valves. Are these similar to (if not the same) as the procomps everyone hates? Or are these something different? I spoke to the seller and he said they have a .450 deck on them as well.
1.575" one piece swirl polished stainless steel severe duty exhaust valves (Qualcast) .312 stems
2.020" one piece swirl polished stainless steel severe duty intake valves (Qualcast) .312 stems
1.320" OD X 2.235 True Double Springs (Qualcast)
New Hardened 1.300 Retainers 7°
New Hardened 312 Valve Locks
New 312 Positive Control Seals
New .015" Valve Shim
Springs,
Engine: LS1 LS2 LS6
Number Of Coils: Dual Spring
Damper Spring: No
Overall Diameter: 1.320" OD
Inside Diameter: .676" ID
Spring Height: 1.800"
Seat Pressure: 145 lbs @ 1.800"
Open Pressure: 385 lbs
. @ 1.150"Flow @ 28" H20
Lift Intake Exhaust
.200 144 109
.300 202 154
.400 254 187
.500 290 205
.600 313 214
Coil Bind: 1.100"
Spring Rate (lbs./in.): 375 lbs/in
Max Lift: .680"
2.020" one piece swirl polished stainless steel severe duty intake valves (Qualcast) .312 stems
1.320" OD X 2.235 True Double Springs (Qualcast)
New Hardened 1.300 Retainers 7°
New Hardened 312 Valve Locks
New 312 Positive Control Seals
New .015" Valve Shim
Springs,
Engine: LS1 LS2 LS6
Number Of Coils: Dual Spring
Damper Spring: No
Overall Diameter: 1.320" OD
Inside Diameter: .676" ID
Spring Height: 1.800"
Seat Pressure: 145 lbs @ 1.800"
Open Pressure: 385 lbs
. @ 1.150"Flow @ 28" H20
Lift Intake Exhaust
.200 144 109
.300 202 154
.400 254 187
.500 290 205
.600 313 214
Coil Bind: 1.100"
Spring Rate (lbs./in.): 375 lbs/in
Max Lift: .680"
Last edited by KCS; Mar 21, 2017 at 03:47 PM. Reason: Removed Non Sponsor Link & Pricing
They look decent but for that cheap you just gotta be suspicious
I'm sure the tech members unanimously vote you to be the first to put them on a three HP per cube application and let us know......
I'm sure the tech members unanimously vote you to be the first to put them on a three HP per cube application and let us know......
Thread Starter
Joined: May 2011
Posts: 8,478
Likes: 1,022
From: Wichita, KS
It’s tempting! I’m sure I can sell these ported 243’s w springs for enough to cover them. Just heard so many horror stories about the COMP stuff that I didn’t want to be the guinea pig!
Joined: Mar 2007
Posts: 1,141
Likes: 47
From: Saskatchewan, Canada - where arguing "DA" is for the slow and weak...
TECH Enthusiast
Joined: Nov 2017
Posts: 661
Likes: 91
From: S.F. East bay
Has anyone used “Proheader” casting heads?
Non-Sponsor Soliciting Policy
I cleaned up a set of 243’s and I figure by the time I mill them and install a decent set of springs on them... I’d be into these heads for more than these which claim pretty good flow numbers and have SS valves. Are these similar to (if not the same) as the procomps everyone hates? Or are these something different? I spoke to the seller and he said they have a .450 deck on them as well.
Non-Sponsor Soliciting Policy
I cleaned up a set of 243’s and I figure by the time I mill them and install a decent set of springs on them... I’d be into these heads for more than these which claim pretty good flow numbers and have SS valves. Are these similar to (if not the same) as the procomps everyone hates? Or are these something different? I spoke to the seller and he said they have a .450 deck on them as well.
TECH Enthusiast
Joined: Nov 2017
Posts: 661
Likes: 91
From: S.F. East bay
These are the ls3 version he sells.....what is that washer supposed to do besides bring the valvespring closer to the seal.....to eat it!!!!
After with ls6 springs and tophat valve seals.....
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TECH Enthusiast
Joined: Nov 2017
Posts: 661
Likes: 91
From: S.F. East bay
For the record clewho valvesprings must always be replaced, or corrected......at the least, and always thougholy blow out all the passages for excess machining waste......he usually leaves a mess behind...bottom line you get what you pay for......
Launching!
Joined: Oct 2016
Posts: 248
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hey how are you, i have the same heads but im using the dual springs that it came with do to the cam im using .. i have a shim thats .015 as well but not sure how i would get a spring seat locator thats that .015? any ideas .. i really would like to use the top hot seals but i cant with the dual springs.. any help would be appreciated... thank you in advance
TECH Enthusiast
Joined: Nov 2017
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From: S.F. East bay
Remove the shims and remove the inner springs , just run the outer springs with the top hats......I used blue ls6 springs and top hats....but definitely toss those shims and install the correct locators.....easiest route would be top hats ,and remove inner springs to clear top hats
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From: S.F. East bay
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These are what i used for my clewho ls6 cathedral ports....just had to swap valve locks and retainers
Last edited by KCS; Jul 5, 2018 at 02:12 PM.
Launching!
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These are what i used for my clewho ls6 cathedral ports....just had to swap valve locks and retainers
https://www.texas-speed.com/p-1148-t...-camshaft.aspx
Last edited by KCS; Jul 5, 2018 at 02:12 PM.
TECH Senior Member
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From: Central Cal.
If you remove the inner spring, the outer might not be strong enough to do its proper job. Check the spring rates for the inner and outer separately before doing it.
Last edited by G Atsma; Jul 5, 2018 at 05:06 PM.
TECH Enthusiast
Joined: Nov 2017
Posts: 661
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From: S.F. East bay
Yeah you'd have to check like G said, but the e bay seller claims you can remove the spring for them too work that way....he has the spring ratings on his listing fine print.....I just tossed all of his springs and installed beehives on both sets just cause after seeing that washer/shim bs. I simply didn't trust his work....I suggest u do the same regardless what spring route you go!
Teching In
Joined: Jul 2018
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Now that's a true saying you do Get what you pay for !!! and there is a reason things are cheap . I would never touch a pair of those heads I think there made out of recycled beer cans
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From: Central Cal.
https://ls1tech.com/forums/generation-iii-internal-engine/455077-non-sponsor-soliciting-policy.html"]Non-Sponsor Soliciting Policy[/url]
These are what i used for my clewho ls6 cathedral ports....just had to swap valve locks and retainers
Proheader Performance is a new company, started in 2010. But they have an extensive line of components with their name on them. I smell chinese food. https://www.coloradospeed.com/speedmaster79-ezp-88.html
Never use cheap parts, they're too expensive.
Never use cheap parts, they're too expensive.