Canted valve heads
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Teching In
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Originally Posted by dAgent
Tony, do you think you'll be working with the new BTR canted valve castings in the future when they come out?
More than likely....at this point it sounds interesting on paper and we go from there.
It's been in development quite a long time but it has been on my radar
-Tony
TECH Enthusiast
Joined: Feb 2018
Posts: 636
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From: Michigan
getting them from GPI .
Going on my 416
12-1 compression btr cathedral heads
Btr 246/260 111
Holley Split single plane
ATM 1050 carb
holley term x
Flt lvl5 4l60
Yank 4000ss
4.10 gears
3050-3100lb race weight.
I went with the canted valve heads for several reasons. 1 i have dished pistons and needed the 61cc to retain my 12-1 compression. 2 powered metal guides. 3 hollow intake valves. 4 i already have a cathedral intake manifold.
Going on my 416
12-1 compression btr cathedral heads
Btr 246/260 111
Holley Split single plane
ATM 1050 carb
holley term x
Flt lvl5 4l60
Yank 4000ss
4.10 gears
3050-3100lb race weight.
I went with the canted valve heads for several reasons. 1 i have dished pistons and needed the 61cc to retain my 12-1 compression. 2 powered metal guides. 3 hollow intake valves. 4 i already have a cathedral intake manifold.
11 Second Club
Joined: Sep 2015
Posts: 271
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Quote:
Originally Posted by dAgent
Tony, do you think you'll be working with the new BTR canted valve castings in the future when they come out?
More than likely....at this point it sounds interesting on paper and we go from there.
It's been in development quite a long time but it has been on my radar
-Tony
Originally Posted by dAgent
Tony, do you think you'll be working with the new BTR canted valve castings in the future when they come out?
More than likely....at this point it sounds interesting on paper and we go from there.
It's been in development quite a long time but it has been on my radar
-Tony
I’ve been in talks with Tony for months about this, but I was never sure if we would actually ever see a set…especially after Brian sold out. I’ll keep you guys posted.
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11 Second Club
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I follow you now, good to hear he’s willing to check them out….hes got a set of PRC heads I sent him for some work right now, looking forward to getting them and a custom cam from him.
I'm curious what he could do with them, especially the Cathedral ports but I don't know how much gains there will be over his current offerings. I am probably better off going to his 243cc head.
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From: Franconia, PA
Porters Castings are currently $899 a piece from BTR, so its anyone's guess what assembled As Cast versions will cost. Figure $900 * 2 + $400 for a spring kit and $300 for lightweight valves.
That puts my As Cast version estimate at $2500. That would be a pretty solid deal if they work as well as advertised.
Last edited by Abs; Apr 16, 2026 at 04:05 PM.
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time will tell but he might not be able to beat them with current offerings. Brian describes these as a cheat code with respect to how the air flows without even having to use large ports. These have a designed advantage, and they will be offered As Cast pretty soon. I heard Brian say on a podcast that the As Cast offerings will only be like 10CFM different than ported versions. He said that the porters of the current castings requested that the As Cast versions not be so close to what can be achieved via porting, and Brian said that's not how they roll, so expect the As Cast versions to be pretty damn good.
Porters Castings are currently $899 a piece from BTR, so its anyone's guess what assembled As Cast versions will cost. Figure $900 * 2 + 300 for springs. How much are LT1 lightweight valves and locks?
Maybe the As Cast versions will be $2500? That would be a pretty solid deal if they work as well as advertised.
Porters Castings are currently $899 a piece from BTR, so its anyone's guess what assembled As Cast versions will cost. Figure $900 * 2 + 300 for springs. How much are LT1 lightweight valves and locks?
Maybe the As Cast versions will be $2500? That would be a pretty solid deal if they work as well as advertised.
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From: Franconia, PA
Hopefully this gets these young guys some more views. An 80 minute interview with Brian should have a lot more than 231 views, so we will see what posting it here will take it to. This should have thousands of views if people knew it was out there.
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From: Alaska
"An 80 minute interview with Brian............................."
Ain't NOBODY got time fo' Dat.
You got cylinder heads?
How about you show us a picture of the combustion chamber, and a FLOW chart?
. Take ya 2 minutes.
Ain't NOBODY got time fo' Dat.
You got cylinder heads?
How about you show us a picture of the combustion chamber, and a FLOW chart?
. Take ya 2 minutes.
Guys the flow numbers from GPI aren’t promising….Tonys 243 heads flow more than the BTR rectangle ports do. This endeavor isn’t a whole lot different from a GM LT head. Me and Tony have been been discussing this….I’m not sure this is going to be everything we hoped for. Time will tell. Hopefully I’m terribly wrong here.
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Teching In
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Guys the flow numbers from GPI aren’t promising….Tonys 243 heads flow more than the BTR rectangle ports do. This endeavor isn’t a whole lot different from a GM LT head. Me and Tony have been been discussing this….I’m not sure this is going to be everything we hoped for. Time will tell. Hopefully I’m terribly wrong here.
Watched that podcast, I think I heard Brian saying something about GPI not selling any more of their best aftermarket LS3 heads (which would be their Brodix heads I think) because these were 20hp better so Idk. Also said these were 10-20 hp below Frankenstein LS7 heads on a 427" but 100 foot pounds better in the midrange. Either Brian is one hell of a salesman or ...... It's really hard not to believe the guy, I give him that. Also, it's really hard not to agree with the guy on a lot of his durability, reliability and efficiency views.
Last edited by dAgent; Apr 16, 2026 at 09:52 PM.
Guys the flow numbers from GPI aren’t promising….Tonys 243 heads flow more than the BTR rectangle ports do. This endeavor isn’t a whole lot different from a GM LT head. Me and Tony have been been discussing this….I’m not sure this is going to be everything we hoped for. Time will tell. Hopefully I’m terribly wrong here.
I have seen a company called GROOM Racing in Northern California also advertise they were doing some sets as well. I have not seen there numbers posted anywhere yet.
I am curious why Brian didn't release his own version. Supposedly he developed a port and they did some testing. But flow numbers were never posted.
In one of the podcast interviews he claimed nearly 100 HP gain with the heads they used for testing.
Last edited by 1FastBrick; Apr 17, 2026 at 02:06 AM. Reason: Clarification on Kuntz who is owned by GPI but run as a stand alone.
i believe gpi uses the kuntz side of the business for doing the actual port work. Same place where eric weingarten does his dyno testing at. https://kuntzpower.com/about/
i have seen a company called groom racing in northern california also advertise they were doing some sets as well. I have not seen there numbers posted anywhere yet.
I am curious why brian didn't release his own version. Supposedly he developed a port and they did some testing. But flow numbers were never posted.
In one of the podcast interviews he claimed nearly 100 hp gain with the heads they used for testing.
i have seen a company called groom racing in northern california also advertise they were doing some sets as well. I have not seen there numbers posted anywhere yet.
I am curious why brian didn't release his own version. Supposedly he developed a port and they did some testing. But flow numbers were never posted.
In one of the podcast interviews he claimed nearly 100 hp gain with the heads they used for testing.
gromm*
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Guys the flow numbers from GPI aren’t promising….Tonys 243 heads flow more than the BTR rectangle ports do. This endeavor isn’t a whole lot different from a GM LT head. Me and Tony have been been discussing this….I’m not sure this is going to be everything we hoped for. Time will tell. Hopefully I’m terribly wrong here.
