Cam swap and vacuum - LS3
Thread Starter
Teching In
Joined: Jun 2019
Posts: 15
Likes: 0
Cam swap and vacuum - LS3 Thinking about a cam swap in my 1970 Nova. Car currently has a LS3 “hot cam”, TKO600, 3.91s (440whp/400wtq). I drive the car everywhere any chance I get. While the car is definitely fun it’s fairly tame. Looking for something a little more aggressive (470-480whp/430wtq) along the lines of a stage 3 Brian Tooley, Gwatney, TSP, etc..... The tuner will custom spec the cam.
Anyone have a similar set up or can comment on vacuum with a fairly aggressive cam swap? Car has factory power discs up front/rear drums. Any Potential vacuum issues with the new cam....? I’d prefer not to Hydro-Boost.
Thanks!!
Anyone have a similar set up or can comment on vacuum with a fairly aggressive cam swap? Car has factory power discs up front/rear drums. Any Potential vacuum issues with the new cam....? I’d prefer not to Hydro-Boost.
Thanks!!
H/C LS3 in my '95 Impala. My cam is just a tiny bit less aggressive than the BTR stage 3 cam....and I have no vacuum issues at all.
Car is my daily driver....currently, to the wheels it's in the 495hp/445tq range.
FWIW.
KW
Car is my daily driver....currently, to the wheels it's in the 495hp/445tq range.
FWIW.
KW
Staging Lane
Joined: Jan 2011
Posts: 59
Likes: 19
I had the BTR Stage 2 in the LS3 in my 67 Camaro. No issues. I dont think that the BTR Stage 3 would be an issue either. I switched to a different cam due to my single plane intake set up 228/238, 621/604, 111+4. (10* overlap) I have 14" of vacuum at idle. My brakes work fine. I am running a 9" dual diaphragm booster. They are the best for lower vacuum It is an easy swap. You could also add a separate reservoir.
