BTR Stage 2 vs GPI Stage 2
Thread Starter
Racer
Joined: Mar 2018
Posts: 279
Likes: 35
BTR Stage 2 vs GPI Stage 2
I ready to add a cam to my Auto fbo lt4,and stuck on which cam to order. BTR2 or Gpi stage 2
Anyone got any ideas how these cams perform. the exhaust side on the gpi is 250 how does that help compared to the btr2 242?
also would the GPi have more chop?
btr2
227 int./242 exh. Duration, 0.638 in./626 in. Lift, 115+6 LSA,
GPi
226/250 LIFT .639"/.639" 116LSA +3
Anyone got any ideas how these cams perform. the exhaust side on the gpi is 250 how does that help compared to the btr2 242?
also would the GPi have more chop?
btr2
227 int./242 exh. Duration, 0.638 in./626 in. Lift, 115+6 LSA,
GPi
226/250 LIFT .639"/.639" 116LSA +3
Last edited by twostep361; Feb 13, 2020 at 12:20 AM.
Racer
Joined: Jan 2018
Posts: 371
Likes: 55
From: Cleveland, OH
I have the BTR stage 2 cam. I made the mistake of going with the phase limiter not the lockout. For a whole year my tuner after 3 retunes they can't tune out the 1800-2100 rpm surge which is caused from VVT. the lockout would have solved that. Its in getting swamped to a lockout now, but I decided to go with the new BTR stage 3 since its tore apart again. the specs of that are 231 / 244. Personally I would stay away from the 250 exhaust lift simply because it will increase upper hp and torque at the expense of low end hp & torque.
Racer
Joined: Jan 2018
Posts: 371
Likes: 55
From: Cleveland, OH
the stage 3 cam will give approx 18-20 wheel horse more than the stage 2. Im switching it because my car is a street car and I’m keeping it setup with a Pd blower. This means with street tires I already have more than enough torque and the loss in lower hp/torque to be Increased on the top will only help me with traction.
Team Owner
Joined: Jan 2007
Posts: 29,065
Likes: 1,839
From: cookeville tennessee
ttt
from the # here if you want a more sounding cam that BTR on the 115 +6 deg of timing in it will sound better as far a more cam sound. I have this same cam in my all forged A/A TI set up but I did go with a CIRCLE D converter in my car but my converter was a small one...It works great. Robert
Team Owner
Joined: Jan 2007
Posts: 29,065
Likes: 1,839
From: cookeville tennessee
Ttt
Here is a video of the BTR Stage 2 Cam, with the limiter, ARH 2" long tubes, high flow cats and Corsa extreme mufflers
https://youtu.be/MJWf02mjFNs
https://youtu.be/MJWf02mjFNs
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Racer
Joined: Jan 2018
Posts: 371
Likes: 55
From: Cleveland, OH
Melting Slicks
Joined: Aug 2015
Posts: 2,889
Likes: 66
Originally Posted by Tortugas12
If you can have Ryan tune it I would go with the GPI. Those guys know what they are doing
Drifting
Joined: Jul 2005
Posts: 1,646
Likes: 188
VVT changes even in stock form make gains.. something I rarely see other “pro” tuners do
Thread Starter
Racer
Joined: Mar 2018
Posts: 279
Likes: 35
i spoke with Brian tooley about this and they said you could do either the limiter or lockout on the stage 2. However all of their testing is done with it locked out. On the stage 3 it’s required to have the lockout. The cam is too big to allow it to change timing.
the stage 3 cam will give approx 18-20 wheel horse more than the stage 2. Im switching it because my car is a street car and I’m keeping it setup with a Pd blower. This means with street tires I already have more than enough torque and the loss in lower hp/torque to be Increased on the top will only help me with traction.
the stage 3 cam will give approx 18-20 wheel horse more than the stage 2. Im switching it because my car is a street car and I’m keeping it setup with a Pd blower. This means with street tires I already have more than enough torque and the loss in lower hp/torque to be Increased on the top will only help me with traction.
BTR has a max effort blower cam also did you look in to that one also?
Racer
Joined: Jan 2018
Posts: 371
Likes: 55
From: Cleveland, OH
Burning Brakes
Joined: Nov 2016
Posts: 769
Likes: 88
From: Ewa Beach Hawaii
I am sure you will need a TC with the BTR Stage III pretty aggressive cam. Rode in a buddies C7 with a Stage II and he had some noticeable surging at low RPM's didn't bother me that much but suspect it to be a little more noticeable with their Stage III. I even think their site has a note about changing the TC.