Cam-only LS1 BTR Stage 4 Dyno Results!
#41
TECH Enthusiast
iTrader: (5)
Join Date: Oct 2005
Location: Central, NJ
Posts: 741
Likes: 0
Received 0 Likes
on
0 Posts
I have the graph and time slip I guess that isn't too bad but I need to actually put tire on the car and get it to hook so I can see where I'm at. I might try short shifting into 4th next time to see if I can get the car to go a little faster since I make more torque a little lower in the power band. I think even with 3.42 gears (which are probably hurting my times) I can trap a little faster.
#42
TECH Apprentice
Thread Starter
iTrader: (5)
Join Date: Jul 2010
Location: Pasadena, Maryland
Posts: 320
Likes: 0
Received 0 Likes
on
0 Posts
Just to see if I can squeeze more MPH out of the car without gear. The torque drops almost 60 from 5500 rpm onward. I'm going through the traps at the top of third at around 6500 rpm right now.
#44
Moderator
iTrader: (4)
Join Date: Jul 2014
Location: My own internal universe
Posts: 10,452
Received 1,851 Likes
on
1,152 Posts
If you're 360 pounds of torque at 5500 and 300 at 6500, if you're in third that's 400 at the tire and 360 at the tire in fourth
Set your valve train up to rev to 7300 and ride your gears.
My car, at 7300 in first I have more pavement torque than I do in second at 5200 on the upshift, which is where my torque peaks! Torque at the tire is king, which means maximizing your power curve not your torque curve.
#48
S60 is very strong and cheap but you are stuck with a 3.54 gear being the lowest numerical available.
I think i've about decided myself to go with the 9" probably a Moser setup, because of my T400 transmission I can throw in a 2.75 or even 2.50 center section easily and go cruising and still have more than enough power for the street plus top end speed, then just throw together another spooled center section with whatever ratio I need optimum for the track.
#49
TECH Apprentice
Thread Starter
iTrader: (5)
Join Date: Jul 2010
Location: Pasadena, Maryland
Posts: 320
Likes: 0
Received 0 Likes
on
0 Posts
I doubt one is more overkill than the other. The 9" gives you endless gear ratio and easy ratio swaps. S60 ring gear setup apparently chews a bit less HP than a 9" but I think that is arguable given it's weight and size. From memory they both about equal each other out in a 1/4 run.
S60 is very strong and cheap but you are stuck with a 3.54 gear being the lowest numerical available.
I think i've about decided myself to go with the 9" probably a Moser setup, because of my T400 transmission I can throw in a 2.75 or even 2.50 center section easily and go cruising and still have more than enough power for the street plus top end speed, then just throw together another spooled center section with whatever ratio I need optimum for the track.
S60 is very strong and cheap but you are stuck with a 3.54 gear being the lowest numerical available.
I think i've about decided myself to go with the 9" probably a Moser setup, because of my T400 transmission I can throw in a 2.75 or even 2.50 center section easily and go cruising and still have more than enough power for the street plus top end speed, then just throw together another spooled center section with whatever ratio I need optimum for the track.
#51
Finally got my car to the tuner Friday for a tuning session, I'm very pleased with the results! The final numbers were 407 HP / 370 TQ in 90*+ weather. The low numbers on the chart were my bolt-on/tune baseline before the cam swap. How are the numbers comparing to other cam-only cars? It pulls so much harder now even with my 3.42 gears, I can't wait to change them to 4.11 or 4.30s/4.56s
Mods:
BTR Stage 4 cam
BTR .660 Springs
LS6 intake (stock)
TSP 1-7/8" headers + 3" Y pipe to a cutout
K&N FIPK
Mods:
BTR Stage 4 cam
BTR .660 Springs
LS6 intake (stock)
TSP 1-7/8" headers + 3" Y pipe to a cutout
K&N FIPK