[6spdhyperblue]

Originally Posted by Joey Soul

I have my engine apart now and planning for a cam, I need the durability also because this car only sees road course. 20-30 min at full throttle. I was leaning on the gpi stage 3.

These days I am only considering spintron validated cams as a minimum requirement. Despite other cams/packages that I am drooling over the results, I am sticking to that

Katech and now btr would be the only ones I’d consider
I don’t care how much less power they make.

Otherwise I’d give up more power and use a lt5 cam so I can delete the dod

IMO, GPI and Texas speed grinds are at the bottom of my list fwiw

[Joey Soul]

Originally Posted by 6spdhyperblue

These days I am only considering spintron validated cams as a minimum requirement. Despite other cams/packages that I am drooling over the results, I am sticking to that

Katech and now btr would be the only ones I’d consider
I don’t care how much less power they make.

Otherwise I’d give up more power and use a lt5 cam so I can delete the dod

IMO, GPI and Texas speed grinds are at the bottom of my list fwiw

Hm yea texas speed was a 100% no after seeing how bad they beat up valve seats, i didnt hear that from gpi but ill look into spintron. I haven't heard of it before this thread really.

[s346k]

the btr220 really punches above its weight class. it is larger than everyone thinks and utilizes a 4* vvt limiter. i've seen dynos of that cam with several different combos, its impressive. i think that camshaft with a set of cids and carbon r or hi ram would be the best of both worlds. providing great tq and top end power as well. all while retaining cooperative lobes and basically unprecedented (at this point) gen v testing.

edit: on stock heads the btr220 & 225, make within 10 hp of each other and the 225 gave up a little bit of tq.

[cmitchell17]

I like to see how they are trying with VVT and not just "deleting" it because people think "deleting" things is cool, but I hope they aren't just using it as a marketing technique.

[KingLT1]

Not sure...I recall other companies were selling 4-degree limiter cams before the lock/out delete was the new thing. Then we started seeing stock LT1 head valve seat failure and the heads were blamed. It appears now we are finding out that the stock seats are failing because the valves were bouncing off the seats using dual springs with most of the high lift cams on the market.

It almost seems like companies took lobes that worked on LS stuff and used them on LT and hoped for the best. I am wondering if the 1.8 rocker arm ratio is some of the culprit. As I mentioned before the only other GM small block that used 1.8 rockers was the LS7 and it was plagued with valve issues...even in stock form. The LS3 was solid.

Mr. Tooley invested a lot of money bringing a Spintron machine in house to sort that issue out. And he redesigned all of their cam lobes based on that research and development.

So, it's hard to really say what is marketing and what is not. But I was right all along when I said a lot of these companies are selling cam kits without any regards to longevity. It's all about power numbers regardless of if you only get 10k miles out of your top end.

[70ls1nova]

I just had the BTR stage 3 put in mine. While it was apart, I figured i'd do heads too. Went with Frankenstein heads and upgraded the low side to lt4 pump and injectors.

https://youtube.com/shorts/ie0iQVB4RHk

[LloydK]

I run GPI stage 1 cam and ported heads, I’ve got almost 39 thousand miles on my build, no issues, I ran 11.2 full weight and stuff in the trunk, Camarofest, Tail of the dragon a few times, 300-400 mile trips, beat on it, drive back knock out 22-25 miles a gallon averaging 80mpg, GPI has it going on ��

[17camaroSS]

Originally Posted by 6spdhyperblue

These days I am only considering spintron validated cams as a minimum requirement. Despite other cams/packages that I am drooling over the results, I am sticking to that

Katech and now btr would be the only ones I’d consider
I don’t care how much less power they make.

Otherwise I’d give up more power and use a lt5 cam so I can delete the dod

IMO, GPI and Texas speed grinds are at the bottom of my list fwiw

Ryan posted a video a few weeks back about their lobes and the different ones they’ve got and what they’re used for. They’ve got a lobe specifically for people who want reliability.

[6spdhyperblue]

Originally Posted by 17camaroSS

Ryan posted a video a few weeks back about their lobes and the different ones they’ve got and what they’re used for. They’ve got a lobe specifically for people who want reliability.

Yeah I just don’t see that they’re validated by a spintron. that’s what should show close to what’s happening. Sounds like there’s multiple variations of the cam to validate

You can pick a lobe with less lift and less aggressive ramps but how that all works at the seat can be still to simple.

[BMEP]

The new Gen V BTR cams developed with a Spintron and engine dyno are a great choice. BTR told me that their dyno engine has only OEM LS7 lifters. Other high lift cams recommend GM racing lifters or Johnsons, so that says something about the smooth, controlled valve actuation.

The Gen V 230 is about 14 deg overlap @0.050” lift. Max effort VVT.
225 about 8 deg
220 is 0 deg
217 is negative 4 deg. Largest cam for 5.3 without flycutting pistons.

I’m selecting either the 220 or 217 for my daily driver build, NA, E85, GPI ported heads, 13:1, MSD intake, 95mm Soler TB, SW Long Tubes. Targeting 550-600 whp.

[Bud357]

Agreed. BTR just released a video explaining in detail their development and testing on cams using the Spintron. Very interesting, they seem to be the leaders in development with gen V engine camshaft design. I’m thinking on going with the 220.

[6spdhyperblue]

Originally Posted by KingLT1

I think the v220 would likely be ok with manifolds and ca pipes. A local shop really likes that cam far as performance and drivability...also works great with stock converter.

Yeah I’ve been thinking on this more. I am going btr220.
Mill the heads .010
either prays std port or katech
Ca pipes
Keeping the lt2 intake so don’t need a cam to go past 6800

Still not sure if it’ll go in the a10 or the 1le at this point

[KingLT1]

Originally Posted by 6spdhyperblue

Yeah I’ve been thinking on this more. I am going btr220.
Mill the heads .010
either prays std port or katech
Ca pipes
Keeping the lt2 intake so don’t need a cam to go past 6800

Still not sure if it’ll go in the a10 or the 1le at this point

That should be a nice setup for the street!

[6spdhyperblue]

Just heard a cammed car on YouTube with stock exhaust and I’m not sure I like it. I’m confused how it changed the tone so much. Seems like the canned cars sound better with headers, unless someone can disprove that.
If that is so, it is coming down to an exhaust decision for me. Do I want to keep stock exhaust or go back to long tubes. Shame it’s coming down to this but there’s a good chance I change location and need the exhaust untouched