Btr v3 truck cams!
Thread Starter
TECH Regular
Joined: May 2023
Posts: 419
Likes: 139
From: Franconia, PA
Btr v3 truck cams! I saw Brian reference these in a post a month ago and was eager to see the new specs. They dont disappoint. Lower intake durations and lsa (ICL) to make them strong in the low to mid range and a decent exhaust split to help them carry up top. Modeled similar to the truck norris cam, which hasnt been updated and doesn't need to be. These out perform the v2 cams everywhere, including the stage 1 beating the torque cam, and higher lift compared to the torque cam.
Now you have these truck cams for the street or if you value low and mid range over top end. And you have the ls1/ls2/ls3 cams plus the red hot and hot rod cams if you prefer top end or have a drag or street/strip car.
For my 5.7L GTO, I like the stage 3. Similar to the truck norris but exchanging a small amount of low and mid range to pull a little better up top. Stage 4 looks tasty too but I feel like that would be best in 6.0s and 6.2s
https://briantooleyracing.com/new-products.html
Now you have these truck cams for the street or if you value low and mid range over top end. And you have the ls1/ls2/ls3 cams plus the red hot and hot rod cams if you prefer top end or have a drag or street/strip car.
For my 5.7L GTO, I like the stage 3. Similar to the truck norris but exchanging a small amount of low and mid range to pull a little better up top. Stage 4 looks tasty too but I feel like that would be best in 6.0s and 6.2s
https://briantooleyracing.com/new-products.html
I don’t understand why Brian doesn’t post the full exhaust duration spec. 210 vs 219 degrees is huge…I won’t buy a cam from him because of this. What is he trying to hide? If another cam manufacturer doesn’t know the lobe family, it can’t be duplicated, regardless of what is known. Silly.
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From: TX
I know BTR knows way more about cams than most of us here, no doubt. But Im not a big fan of their wide splits in duration. Ive been looking for a mild cam for one of my LS1 cars. Specs on their V2 stage 1 LS1 cam are 217/23X .615/636 113. Even if the exhaust duration is 230, thats about -2.5 degrees of overlap. Which will idle smooth I guess. But thats also a lot of lift for a mild "stage 1" cam.
I may have to pick a truck cam from either them, TSP or the other major manufacturers. Which is fine, I try to overlook the cam of the week marketing and just concentrate on the valve events
I may have to pick a truck cam from either them, TSP or the other major manufacturers. Which is fine, I try to overlook the cam of the week marketing and just concentrate on the valve events
Thread Starter
TECH Regular
Joined: May 2023
Posts: 419
Likes: 139
From: Franconia, PA
I know BTR knows way more about cams than most of us here, no doubt. But Im not a big fan of their wide splits in duration. Ive been looking for a mild cam for one of my LS1 cars. Specs on their V2 stage 1 LS1 cam are 217/23X .615/636 113. Even if the exhaust duration is 230, thats about -2.5 degrees of overlap. Which will idle smooth I guess. But thats also a lot of lift for a mild "stage 1" cam.
I may have to pick a truck cam from either them, TSP or the other major manufacturers. Which is fine, I try to overlook the cam of the week marketing and just concentrate on the valve events
I may have to pick a truck cam from either them, TSP or the other major manufacturers. Which is fine, I try to overlook the cam of the week marketing and just concentrate on the valve events
My gto is a street car so i will likely go with the stage 3 v3 truck cam. 213 intake duration and 109 lsa should be nice and strong in the low to mid range and better than the truck norris cam up top.
Last edited by Abs; Oct 19, 2025 at 08:11 PM.
I'm also not a big fan of intake to exhaust splits. I have a mildly built LS7. The last cam I had was 232° intake, 250° exhaust. Most know the LS7 has a weaker exhaust as compared to the intake side. An example would be the Tony Mamo designed AFR 225 heads. The cam for the engine that ran his 225's also had a 232° intake lobe. But the exhaust was only 236°, a far cry from 250°. That 232/236 engine was a torque monster!!
Thread Starter
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Joined: May 2023
Posts: 419
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From: Franconia, PA
I'm also not a big fan of intake to exhaust splits. I have a mildly built LS7. The last cam I had was 232° intake, 250° exhaust. Most know the LS7 has a weaker exhaust as compared to the intake side. An example would be the Tony Mamo designed AFR 225 heads. The cam for the engine that ran his 225's also had a 232° intake lobe. But the exhaust was only 236°, a far cry from 250°. That 232/236 engine was a torque monster!!
I know BTR has said that they have done a lot of dyno testing. It could be that his lobes benefit more from the bigger exhaust? I know that TSP has said that extending the exhaust duration from an even split to a 4 split yields like 5 hp. Maybe giving another 4 can give another 5? I also know that bumping intake duration has a much bigger effect on a cam and manners, whereas it doesn't cause a lot of issues to extend the exhaust only. The impact is less.
I will say that BTRs new v3 truck cams do better basically everywhere than the v2 cams that only had a 6 degree split. Based on the truck norris and ls1/2/3 v2 cam results, I was expecting a big split here and sure enough it came, but that seems to be the recent theme with BTR.
Same car, 2 different 427s. The first one 20 years ago used the CNC ported (by Tony/AFR) 225 heads, and the 232/236 cam. The 225 heads had a much better exhaust port. The current 427 has LS7 heads, which have a rather inefficient exhaust port, relatively speaking. The reason Tony's newer cam picked up so much is because it doesn't have an 18° split. It's only 12°. Other reason is Tony's newer cam has a 2° less on lobe separation, with more lift. Most engines will pick up low end to midrange torque by going with more lift and less duration, up to a point, of course. Tonys new cam has more lift. But more lift with less duration also has more aggressive ramp rates on the lobes. Which can make it harder on the valvetrain at some unknown point. The new cam has 3° more intake duration, and 3° less exhaust duration. Hope this helps clear it up a little, lol......
Last edited by grinder11; Oct 23, 2025 at 08:01 AM.
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Thread Starter
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Joined: May 2023
Posts: 419
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From: Franconia, PA
Same car, 2 different 427s. The first one 20 years ago used the CNC ported (by Tony/AFR) 225 heads, and the 232/236 cam. The 225 heads had a much better exhaust port. The current 427 has LS7 heads, which have a rather inefficient exhaust port, relatively speaking. The reason Tony's newer cam picked up so much is because it doesn't have an 18° split. It's only 12°. Other reason is Tony's newer cam has a 2° less on lobe separation, with more lift. Most engines will pick up low end to midrange torque by going with more lift and less duration, up to a point, of course. Tonys new cam has more lift. But more lift with less duration also has more aggressive ramp rates on the lobes. Which can make it harder on the valvetrain at some unknown point. The new cam has 3° more intake duration, and 3° less exhaust duration. Hope this helps clear it up a little, lol......
You said the first one 20 years ago had the afr 225s and the 232/236 cam that had more torque? I bet the afr heads contributed there too because of the 225cc intake and fast velocity compared to the huge ls7 rectangle port.
So now you have the big port which likely loses some velocity? And a 12 degree split now you said? Or is it 18? You've mentioned both. and you said it has less duration but i thought both are 232 so its only less exhaust duration?
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