BTR 2 or 3 ?
Thread Starter
Safety Car
Joined: Aug 2017
Posts: 4,243
Likes: 1,133
From: North Myrtle Beach SC
BTR 2 or 3 ?
Doing Speed Engineering headers and midpipe. Have a Borla S on car now but also have a NPP axle back to use.
putting in a Yank SS3600 converter.
want to do a cam at same time, either the BTR2 or 3
here is the question. For people who have used the BTR2, how is the idle with LT’s and off-road mid pipe? With a NPP and the valves closed, could it possibly pass for a stock cam (with a 700-750 rpm idle)? If not, I’ll probably go with the BTR3 cam or something similar.
I have the exhaust parts and the converter is supposed to be here in 3 weeks so I need to get the cam parts.
car is a 2012 LS3 A6 car with 48k miles.
putting in a Yank SS3600 converter.
want to do a cam at same time, either the BTR2 or 3
here is the question. For people who have used the BTR2, how is the idle with LT’s and off-road mid pipe? With a NPP and the valves closed, could it possibly pass for a stock cam (with a 700-750 rpm idle)? If not, I’ll probably go with the BTR3 cam or something similar.
I have the exhaust parts and the converter is supposed to be here in 3 weeks so I need to get the cam parts.
car is a 2012 LS3 A6 car with 48k miles.
Melting Slicks
Joined: Oct 2015
Posts: 3,299
Likes: 769
From: Mead Wash
2020 C6 of the Year Finalist - Modified
C6 of Year Finalist (appearance mods) 2019
The only cam that is going to idle like a stock cam is a stock cam. Stage 1 cam is no where near as choppy as a 2 or 3. You should think more about your goals for your car first.
Thread Starter
Safety Car
Joined: Aug 2017
Posts: 4,243
Likes: 1,133
From: North Myrtle Beach SC
I had a 224-.600 cam in a LS1 Z28. It was only 5.7 litres. It was hard to tell it had a cam.
the BTR 2 is a 235@.050 cam in 6.2 litres.
I’d prefer a little stealth, but would never go smaller, cam wise. Hoping with a closed NPP will help.
like to hear from someone who actually has a similar set up not someone who is just guessing.
the BTR 2 is a 235@.050 cam in 6.2 litres.
I’d prefer a little stealth, but would never go smaller, cam wise. Hoping with a closed NPP will help.
like to hear from someone who actually has a similar set up not someone who is just guessing.
Melting Slicks
Joined: Oct 2015
Posts: 3,299
Likes: 769
From: Mead Wash
2020 C6 of the Year Finalist - Modified
C6 of Year Finalist (appearance mods) 2019
Not guessing. I have a TSP stage one cam with Corsa Sports. Definitely not stock sounding. Go to Texas Speed website and listen to Stage one clip. 225-236 114 LSA.
Last edited by 2008 Corvette; Nov 14, 2021 at 04:47 PM.
Le Mans Master
Joined: Jun 2011
Posts: 8,049
Likes: 329
From: Charlotte NC
St. Jude Donor '14-'15
I have a BTR stage1 with a stock converter and it bucks a little. With the stall your going with you should be ok. With everything you'll need with the cam of your choice don't forget about the rocker arms. I found needle bearings in my oil change and did them after the build was done. Kinda pissed me off. 
Melting Slicks
Joined: Feb 2017
Posts: 3,285
Likes: 1,282
From: Phoenix, AZ to Quakertown, PA.
C6 of Year Finalist (appearance mods) 2019
Not guessing. I have a TSP stage one cam with Corsa Sports. Definitely not stock sounding. Go to Texas Speed website and listen to Stage one clip. 225-236 114 LSA.
Pro
Joined: Nov 2013
Posts: 552
Likes: 58
From: western NC, USA
I did a BTR Stage 2 a few years ago (10,000 miles ago) and it's doing just fine. I also did the trunnion upgrade on the rockers. It does have a lope and might be an issue for a stock torque converter in slow traffic, but if you're doing a higher stall that should not be a problem. My trans is an M6 so I don't feel any kind of jerking unless my rpm drops below 1400.
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Melting Slicks
Joined: Oct 2010
Posts: 3,017
Likes: 791
From: Tollesboro Kentucky
I have Speed Engineering headers and x pipe,Borla Atak and a BTR stage 2 cam in my 2008 automatic.DEFINITELY doesn't sound anywhere near stock.I still have the stock converter with no driveability problems.the guy who did the install also did the trunnion upgrade while installing the cam.You will love either cam you choose.I went with the stage 2 as I didn't want to change the converter.No regrets at all.